toggle visibility
Search within Results:
Display Options:

Select All    Deselect All
 |   | 
Details
   print
  Records Links
Author He, Z.; Ke, X.; Bals, S.; Van Tendeloo, G. pdf  doi
openurl 
  Title Direct evidence for the existence of multi-walled carbon nanotubes with hexagonal cross-sections Type A1 Journal article
  Year 2012 Publication Carbon Abbreviated Journal (up) Carbon  
  Volume 50 Issue 7 Pages 2524-2529  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract Carbon nanotubes (CNTs) with a polygonal cross-section have been paid increasing attention since their three-dimensional structure is related to specific physical properties, which are found to be different in comparison to CNTs with a circular cross-section. Here, we report the existence of novel multi-walled CNTs yielding walls with a rounded-hexagonal configuration. This structure was directly confirmed for the first time by both cross-sectional transmission electron microscopy and electron tomography. The morphology of the Fe catalytic particle also exhibits hexagonal characteristics, and is proposed as the origin of the formation of the rounded-hexagonal walls of the CNT. This observation is of great importance with respect to the design of polygonal (such as pentagonal or hexagonal) cross-sectional CNTs. By controlling the morphology of the catalytic nanoparticles it will be possible to grow CNTs with desired electronic and mechanical properties.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Oxford Editor  
  Language Wos 000303038400015 Publication Date 2012-02-06  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0008-6223; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.337 Times cited 8 Open Access  
  Notes Fwo Approved Most recent IF: 6.337; 2012 IF: 5.868  
  Call Number UA @ lucian @ c:irua:96956 Serial 711  
Permanent link to this record
 

 
Author Afanasov, I.M.; Shornikova, O.N.; Avdeev, V.V.; Lebedev, O.I.; Van Tendeloo, G.; Matveev, A.T. pdf  doi
openurl 
  Title Expanded graphite as a support for Ni/carbon composites Type A1 Journal article
  Year 2009 Publication Carbon Abbreviated Journal (up) Carbon  
  Volume 47 Issue 2 Pages 513-518  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract Expanded graphite decorated with nickel oxide particles (EGNiO) has been synthesized through electrochemical oxidation of natural graphite in an aqueous nickel nitrate solution followed by a heat treatment. EGNiO was used to prepare nickel/carbon composites using two techniques: (a) hydrogen reduction of nickel oxide particles loaded on the expanded graphite surface and (b) pyrolysis of coal tar pitch-impregnated EGNiO blocks. The EGNiO as well as the nickel/carbon composites have been characterized by X-ray diffraction, scanning and transmission electron microscopy, energy dispersive X-ray spectroscopy and selected area electron diffraction.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Oxford Editor  
  Language Wos 000262558300018 Publication Date 2008-11-11  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0008-6223; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.337 Times cited 45 Open Access  
  Notes Iap-Vi Approved Most recent IF: 6.337; 2009 IF: 4.504  
  Call Number UA @ lucian @ c:irua:76033 Serial 1132  
Permanent link to this record
 

 
Author Afanasov, I.M.; Shornikova, O.N.; Kirilenko, D.A.; Vlasov, I.I.; Zhang, L.; Verbeeck, J.; Avdeev, V.V.; Van Tendeloo, G. pdf  doi
openurl 
  Title Graphite structural transformations during intercalation by HNO3 and exfoliation Type L1 Letter to the editor
  Year 2010 Publication Carbon Abbreviated Journal (up) Carbon  
  Volume 48 Issue 6 Pages 1862-1865  
  Keywords L1 Letter to the editor; Electron microscopy for materials research (EMAT)  
  Abstract Expandable graphite of two types was synthesized by (1) hydrolysis of graphite nitrate of II stage and (2) anodic polarization of graphite in 60% HNO3. Exfoliated graphite samples were produced by thermal shock of expandable graphite samples in air at 900 °C. A comparative study of microstructural distinctions of both expandable and exfoliated graphite samples was carried out using X-ray diffraction, Raman spectroscopy, electron energy loss spectroscopy and high resolution transmission electron microscopy.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Oxford Editor  
  Language Wos 000276132800021 Publication Date 2010-02-02  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0008-6223; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.337 Times cited 43 Open Access  
  Notes Approved Most recent IF: 6.337; 2010 IF: 4.896  
  Call Number UA @ lucian @ c:irua:82315UA @ admin @ c:irua:82315 Serial 1379  
Permanent link to this record
 

 
Author Zhang, X.F.; Zhang, X.B.; Van Tendeloo, G.; Meijer, G. doi  openurl
  Title “Harmless” carbon tubes around “dangerous” asbestos fibres Type A1 Journal article
  Year 1994 Publication Carbon Abbreviated Journal (up) Carbon  
  Volume 32 Issue Pages 363-366  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Oxford Editor  
  Language Wos A1994NC96800026 Publication Date 2003-06-20  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0008-6223; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.196 Times cited 2 Open Access  
  Notes Approved MATERIALS SCIENCE, MULTIDISCIPLINARY 135/271 Q2 # PHYSICS, APPLIED 70/145 Q2 # PHYSICS, CONDENSED MATTER 40/67 Q3 #  
  Call Number UA @ lucian @ c:irua:10029 Serial 1411  
Permanent link to this record
 

 
Author Felten, A.; Bittencourt, C.; Colomer, J.-F.; Van Tendeloo, G.; Pireaux, J.-J. doi  openurl
  Title Nucleation of metal clusters on plasma treated multi wall carbon nanotubes Type A1 Journal article
  Year 2007 Publication Carbon Abbreviated Journal (up) Carbon  
  Volume 45 Issue 1 Pages 110-116  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Oxford Editor  
  Language Wos 000243583300017 Publication Date 2006-09-27  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0008-6223; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.337 Times cited 40 Open Access  
  Notes Approved Most recent IF: 6.337; 2007 IF: 4.260  
  Call Number UA @ lucian @ c:irua:63033 Serial 2389  
Permanent link to this record
 

 
Author Felten, A.; Ghijsen, J.; Pireaux, J.-J.; Whelan, C.M.; Liang, D.; Van Tendeloo, G.; Bittencourt, C. doi  openurl
  Title Photoemission study of CF4 rf-plasma treated multi-wall carbon nanotubes Type A1 Journal article
  Year 2008 Publication Carbon Abbreviated Journal (up) Carbon  
  Volume 46 Issue 10 Pages 1271-1275  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract Multi-wall carbon nanotubes (MWCNTs) were exposed to a CF4 rf-plasma. X-ray photoelectron spectroscopy analysis shows that the treatment effectively grafts fluorine atoms onto the MWCNTs. The fluorine atomic concentration and the nature of the CF bond (semi-ionic or covalent) can be tuned by varying the exposure time. Ultraviolet photoelectron spectroscopy analysis confirms that the valence electronic states are altered by the grafting of fluorine atoms. Characterization with high-resolution transmission electron microscopy reveals that while the plasma treatment does not induce significant etching impact on the CNT-surface, it does increase the number of active sites for gold cluster formation.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Oxford Editor  
  Language Wos 000258987500001 Publication Date 2008-05-16  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0008-6223; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.337 Times cited 21 Open Access  
  Notes Approved Most recent IF: 6.337; 2008 IF: 4.373  
  Call Number UA @ lucian @ c:irua:76481 Serial 2612  
Permanent link to this record
 

 
Author Afanasov, I.M.; Morozov, V.A.; Kepman, A.V.; Ionov, S.G.; Seleznev, A.N.; Van Tendeloo, G.; Audeev, V.V. pdf  doi
openurl 
  Title Preparation, electrical and thermal properties of new exfoliated graphite-based composites Type A1 Journal article
  Year 2009 Publication Carbon Abbreviated Journal (up) Carbon  
  Volume 47 Issue 1 Pages 263-270  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract Exfoliated graphite samples (EG) with different bulk densities were prepared by the exfoliation of expandable graphite under a thermal shock regime. As a conductive filler, EG has been incorporated successfully into the coal tar pitch matrix by mechanical mixing. The conducting behavior of the composite was interpreted based on the percolation theory. The percolation threshold of the EG/pitch conducting composites at room temperature was as low as 1.5 wt% and did not depend on the bulk density of the EG used. By means of thermogravimetry the improvement of thermal stability of the composites in comparison with pure pitches was detected. The phenomenon was ascribed to heat shielding effect of the EG particles evidenced by matrix-assisted laser desorption/ionization mass spectrometry.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Oxford Editor  
  Language Wos 000262143500032 Publication Date 2008-10-14  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0008-6223; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.337 Times cited 42 Open Access  
  Notes Iap-Vi Approved Most recent IF: 6.337; 2009 IF: 4.504  
  Call Number UA @ lucian @ c:irua:75767 Serial 2701  
Permanent link to this record
 

 
Author Suarez-Martinez, I.; Bittencourt, C.; Ke, X.; Felten, A.; Pireaux, J.J.; Ghijsen, J.; Drube, W.; Van Tendeloo, G.; Ewels, C.P. pdf  doi
openurl 
  Title Probing the interaction between gold nanoparticles and oxygen functionalized carbon nanotubes Type A1 Journal article
  Year 2009 Publication Carbon Abbreviated Journal (up) Carbon  
  Volume 47 Issue 6 Pages 1549-1554  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract The interaction between evaporated gold and pristine or oxygen plasma treated multi-walled carbon nanotubes (MWCNTs) is investigated. Experimental and theoretical results indicate that gold nucleation occurs at defect sites, whether initially present or introduced by oxygen plasma treatment. Uniform gold cluster dispersion is observed on plasma treated carbon nanotubes (CNTs) and associated with the presence of uniformly dispersed oxidized vacancy centres on the CNT surface.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Oxford Editor  
  Language Wos 000265518700018 Publication Date 2009-02-11  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0008-6223; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.337 Times cited 38 Open Access  
  Notes Pai Approved Most recent IF: 6.337; 2009 IF: 4.504  
  Call Number UA @ lucian @ c:irua:77267 Serial 2717  
Permanent link to this record
 

 
Author Van Tendeloo, G.; Bernaerts, D.; Amelinckx, S. doi  openurl
  Title Reduced dimensionality in different forms of carbon Type A1 Journal article
  Year 1998 Publication Carbon Abbreviated Journal (up) Carbon  
  Volume 36 Issue 5/6 Pages 487-493  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Oxford Editor  
  Language Wos 000074824600003 Publication Date 2002-07-25  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0008-6223; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.337 Times cited 4 Open Access  
  Notes Approved Most recent IF: 6.337; 1998 IF: 1.293  
  Call Number UA @ lucian @ c:irua:25662 Serial 2851  
Permanent link to this record
 

 
Author Cabana, L.; Ke, X.; Kepić, D.; Oro-Solé, J.; Tobías-Rossell, E.; Van Tendeloo, G.; Tobias, G. pdf  url
doi  openurl
  Title The role of steam treatment on the structure, purity and length distribution of multi-walled carbon nanotubes Type A1 Journal article
  Year 2015 Publication Carbon Abbreviated Journal (up) Carbon  
  Volume 93 Issue 93 Pages 1059-1067  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract Purification and shortening of carbon nanotubes have attracted a great deal of attention to increase the biocompatibility and performance of the material in several applications. Steam treatment has been employed to afford both purification and shortening of multi-walled carbon nanotubes (MWCNTs). Steam removes the amorphous carbon and the graphitic particles that sheath catalytic nanoparticles, facilitating their removal by a subsequent acidic wash. The amount of metal impurities can be reduced in this manner below 0.01 wt.%. The length distribution of MWCNTs after different steam treatment times (from 1 h to 15 h) was assessed by box plot analysis of the electron microscopy data. Samples with a median length of 0.57 μm have been prepared with the reported methodology while preserving the integrity of the tubular wall structure.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Oxford Editor  
  Language Wos 000360292100108 Publication Date 2015-06-23  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0008-6223; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.337 Times cited 17 Open Access  
  Notes 312483 Esteem2; 290023 Raddel; esteem2_ta Approved Most recent IF: 6.337; 2015 IF: 6.196  
  Call Number c:irua:127691 c:irua:127691 Serial 2921  
Permanent link to this record
 

 
Author Li, Y.; Zhang, X.B.; Tao, X.Y.; Xu, J.M.; Chen, F.; Shen, L.H.; Yang, X.F.; Liu, F.; Van Tendeloo, G.; Geise, H.J. pdf  doi
openurl 
  Title Single phase MgMoO4 as catalyst for the synthesis of bundled multi-wall carbon nanotubes by CVD Type L1 Letter to the editor
  Year 2005 Publication Carbon Abbreviated Journal (up) Carbon  
  Volume 43 Issue 6 Pages 1325-1328  
  Keywords L1 Letter to the editor; Electron microscopy for materials research (EMAT)  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Oxford Editor  
  Language Wos 000228676400026 Publication Date 2005-03-11  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0008-6223; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.337 Times cited 23 Open Access  
  Notes Iap V-1 Approved Most recent IF: 6.337; 2005 IF: 3.419  
  Call Number UA @ lucian @ c:irua:59055 Serial 3026  
Permanent link to this record
 

 
Author Corthals, S.; van Noyen, J.; Liang, D.; Ke, X.; Van Tendeloo, G.; Jacobs, P.; Sels, B. pdf  doi
openurl 
  Title A cyclic catalyst pretreatment in CO2 for high yield production of Carbon nanofibers with narrow diameter distribution Type A1 Journal article
  Year 2011 Publication Catalysis letters Abbreviated Journal (up) Catal Lett  
  Volume 141 Issue 11 Pages 1621-1624  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract This paper presents a cyclic catalyst pretreatment process to improve the CNF yield with narrow size distribution by sequentially feeding the CVD reactor with CH4/CO2 mixtures (carbon deposition) and CO2 (carbon removal) prior to the actual growth process. A mechanism based on a break-up of large Ni particles tentatively explains the beneficial effect of the cyclic carbon deposition/removal CVD procedure.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Basel Editor  
  Language Wos 000296471400006 Publication Date 2011-09-26  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1011-372X;1572-879X; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 2.799 Times cited 1 Open Access  
  Notes Iwt; Iap Approved Most recent IF: 2.799; 2011 IF: 2.242  
  Call Number UA @ lucian @ c:irua:91888 Serial 598  
Permanent link to this record
 

 
Author Filez, M.; Redekop, E.A.; Poelman, H.; Galvita, V.V.; Meledina, M.; Turner, S.; Van Tendeloo, G.; Detavernier, C.; Marin, G.B. pdf  doi
openurl 
  Title One-pot synthesis of Pt catalysts based on layered double hydroxides: an application in propane dehydrogenation Type A1 Journal article
  Year 2016 Publication Catalysis science & technology Abbreviated Journal (up) Catal Sci Technol  
  Volume 6 Issue 6 Pages 1863-1869  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract Simple methods for producing noble metal catalysts with well-defined active sites and improved performance are highly desired in the chemical industry. However, the development of such methods still presents a formidable synthetic challenge. Here, we demonstrate a one-pot synthesis route for the controlled production of bimetallic Pt–In catalysts based on the single-step formation of Mg,Al,Pt,In-containing layered double hydroxides (LDHs). Besides their simple synthesis, these Pt–In catalysts exhibit superior propane dehydrogenation activity compared to their multi-step synthesized analogs. The presented material serves as a showcase for the one-pot synthesis of a broader class of LDH-derived mono- and multimetallic Pt catalysts. The compositional flexibility provided by LDH materials can pave the way towards highperforming Pt-based catalysts with tunable physicochemical properties.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Wos 000372172800031 Publication Date 2015-10-23  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2044-4753 ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 5.773 Times cited 12 Open Access  
  Notes This work was supported by the Fund for Scientific Research Flanders (FWO: G.0209.11), the ‘Long Term Structural Methusalem Funding by the Flemish Government’, the IAP 7/05 Interuniversity Attraction Poles Programme – Belgian State – Belgian Science Policy, and the Fund for Scientific Research Flanders (FWO-Vlaanderen) by supplying financing of beam time at the DUBBLE beamline of the ESRF and travel costs and a post-doctoral fellowship for S. T. The authors acknowledge the assistance from the DUBBLE (XAS campaign 26-01-979) and SuperXAS staff (Proposal 20131191). E. A. Redekop acknowledges the Marie Curie International Incoming Fellowship granted by the European Commission (Grant Agreement No. 301703). The authors also express their gratitude to O. Janssens for performing ex situ XRD characterization. Approved Most recent IF: 5.773  
  Call Number c:irua:133167 Serial 4057  
Permanent link to this record
 

 
Author Martens, J.A.; Thybaut, J.W.; Denayer, J.F.M.; Sree, S.P.; Aerts, A.; Reyniers, M.-F.; van Speybroeck, V.; Waroquier, M.; Buekenhoudt, A.; Vankelecom, I.; Buijs, W.; Persoons, J.; Baron, G.V.; Bals, S.; Van Tendeloo, G.; Marin, G.B.; Jacobs, P.A.; Kirschhock, C.E.A. pdf  doi
openurl 
  Title Catalytic and molecular separation properties of Zeogrids and Zeotiles Type A1 Journal article
  Year 2011 Publication Catalysis today Abbreviated Journal (up) Catal Today  
  Volume 168 Issue 1 Pages 17-27  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract Zeogrids and Zeotiles are hierarchical materials built from assembled MFI zeolite precursor units. Permanent secondary porosity in these materials is obtained through self assembly of nanoparticles encountered in MFI zeolite synthesis in the presence of supramolecular templates. Hereon, the aggregated species are termed nanoslabs. Zeogrids are layered materials with lateral spacings between nanoslabs creating galleries qualifying as supermicropores. Zeotiles present a diversity of tridimensional nanoslab assemblies with mesopores. Zeotile-1, -4 and -6 are hexagonal mesostructures. Zeotile-1 has triangular and hexagonal channels; Zeotile-4 has hexagonal channels interconnected via slits. Zeotile-2 has a cubic structure with gyroid type mesoporosity. The behavior of Zeogrids and Zeotiles in adsorption, membrane and chromatographic separation and catalysis has been characterized and compared with zeolites and mesoporous materials derived from unstructured silica sources. Shape selectivity was detected via adsorption of n- and iso-alkanes. The mesoporosity of Zeotiles can be exploited in chromatographic separation of biomolecules. Zeotiles present attractive separation properties relevant to CO2 sequestration. Because of its facile synthesis procedure without hydrothermal steps Zeogrid is convenient for membrane synthesis. The performance of Zeogrid membrane in gas separation, nanofiltration and pervaporation is reported. In the Beckmann rearrangement of cyclohexanone oxime Zeogrids and Zeotiles display a catalytic activity characteristic of silicalite-1 zeolites. Introduction of acidity and redox catalytic activity can be achieved via incorporation of Al and Ti atoms in the nanoslabs during synthesis. Zeogrids are active in hydrocracking, catalytic cracking, alkylation and epoxidation reactions. Zeogrids and Zeotiles often behave differently from ordered mesoporous materials as well as from zeolites and present a valuable extension of the family of hierarchical silicate based materials.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Amsterdam Editor  
  Language Wos 000291033300003 Publication Date 2011-03-09  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0920-5861; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 4.636 Times cited 13 Open Access  
  Notes Fwo; Iap Sbo Approved Most recent IF: 4.636; 2011 IF: 3.407  
  Call Number UA @ lucian @ c:irua:88647 Serial 290  
Permanent link to this record
 

 
Author Peng, L.; Philippaerts, A.; Ke, X.; van Noyen, J.; de Cleppel, F.; Van Tendeloo, G.; Jacobs, P.A.; Sels, B.F. doi  openurl
  Title Preparation of sulfonated ordered mesoporous carbon and its use for the esterification of fatty acids Type A1 Journal article
  Year 2010 Publication Catalysis today Abbreviated Journal (up) Catal Today  
  Volume 150 Issue 1/2 Pages 140-146  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract Mesoporous carbon, which can be replicated from mesoporous silica and whose surface is hydrophobic, can be an ideal catalyst for the esterification of fatty acids. Here we report an easy and low cost way to prepare sulfonic acid group-functionalized mesoporous carbon. A sample of calcined mesoporous silica SBA-15 was added to an aqueous sucrose solution followed by drying and calcination at different temperatures. In contrast to existing procedures, the obtained hybrid Si/C material was then first sulfonated in H2SO4, before the final removal of the silica template in order to stabilize the porous structure towards the liquid phase sulfonation treatment. Thus the silicacarbon composites, instead of the mesoporous carbon, were successfully sulfonated to introduce SO3H groups, while keeping the ordered mesoporous structure intact. The influence of carbonization temperature was investigated, suggesting an optimum temperature of 873 K. The SO3H group-functionalized mesoporous carbon, denoted as CMK-3-873-SO3H, was characterized by means of XRD, N2 physisorption, SEM, FT-IR, elemental analysis and TEM. It followed that a uniform mesoporous carbon was obtained with an average pore size of 3.89 nm, a specific surface of 807 m2/g and a SO3H group loading of 0.39 meq/g of dry material. Compared with other solid acid catalysts, the resulting material shows enhanced activity in the acid-catalyzed esterification of oleic acid with methanol, and can be used repeatedly. The increased catalytic performance is attributed to the hydrophobic surface and larger pore size of the new catalyst. It can effectively accommodate long chain fatty acids and reject formed water, making the active sites easily accessible.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Amsterdam Editor  
  Language Wos 000275566700024 Publication Date 2009-09-04  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0920-5861; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 4.636 Times cited 132 Open Access  
  Notes Approved Most recent IF: 4.636; 2010 IF: 2.993  
  Call Number UA @ lucian @ c:irua:81739 Serial 2706  
Permanent link to this record
 

 
Author Özen, M.; Mertens, M.; Snijkers, F.; Van Tendeloo, G.; Cool, P. pdf  url
doi  openurl
  Title Texturing of hydrothermally synthesized BaTiO3 in a strong magnetic field by slip casting Type A1 Journal article
  Year 2016 Publication Ceramics international Abbreviated Journal (up) Ceram Int  
  Volume 42 Issue 42 Pages 5382-5390  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT); Laboratory of adsorption and catalysis (LADCA)  
  Abstract Barium titanate powder was processed by slip casting in a rotating strong magnetic field of 9.4 T. The orientation factor of the sintered compact was analyzed by the X-ray diffraction technique and the microstructure (grain-size) was analyzed by scanning electron microscope. The hydrothermally prepared barium titanate was used as matrix material and the molten-salt synthesized barium titanate, with a larger particle-size, was used as template for the templated grain-growth process. Addition of large template particles was observed to increase the orientation factor of the sintered cast (5 vol% loading). Template particles acted as starting grains for the abnormal grain-growth process and the average grain-size was increased after sintering. Increasing the solid loading (15 vol%) resulted in a similar orientation factor with a decrease of the average grain size by more than half. However, addition of templates to the 15 vol% cast had a negative effect on the orientation factor. The impingement of growing particles was stated as the primary cause of particle misorientation resulting in a low orientation factor after sintering. Different heating conditions were tested and it was determined that a slow heating rate gave the highest orientation factor, the smallest average grain-size and the highest relative density. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Barking Editor  
  Language Wos 000369460500098 Publication Date 2015-12-23  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0272-8842 ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 2.986 Times cited 11 Open Access  
  Notes Approved Most recent IF: 2.986  
  Call Number UA @ lucian @ c:irua:132228 Serial 4260  
Permanent link to this record
 

 
Author Colomer, J.-F.; Henrard, L.; Launois, P.; Van Tendeloo, G.; Lucas, A.A.; Lambin, P. pdf  doi
openurl 
  Title Bundles of identical double-walled carbon nanotubes Type A1 Journal article
  Year 2004 Publication Chemical communications Abbreviated Journal (up) Chem Commun  
  Volume Issue 22 Pages 2592-2593  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Wos 000225375100035 Publication Date 2004-09-30  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1359-7345;1364-548X; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.319 Times cited 13 Open Access  
  Notes Approved Most recent IF: 6.319; 2004 IF: 3.997  
  Call Number UA @ lucian @ c:irua:54875 Serial 263  
Permanent link to this record
 

 
Author Yalcin, A.O.; Goris, B.; van Dijk-Moes, R.J.A.; Fan, Z.; Erdamar, A.K.; Tichelaar, F.D.; Vlugt, T.J.H.; Van Tendeloo, G.; Bals, S.; Vanmaekelbergh, D.; Zandbergen, H.W.; van Huis, M.A.; url  doi
openurl 
  Title Heat-induced transformation of CdSe-CdS-ZnS coremultishell quantum dots by Zn diffusion into inner layers Type A1 Journal article
  Year 2015 Publication Chemical communications Abbreviated Journal (up) Chem Commun  
  Volume 51 Issue 51 Pages 3320-3323  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract In this work, we investigate the thermal evolution of CdSeCdSZnS coremultishell quantum dots (QDs) in situ using transmission electron microscopy (TEM). Starting at a temperature of approximately 250 °C, Zn diffusion into inner layers takes place together with simultaneous evaporation of particularly Cd and S. As a result of this transformation, CdxZn1−xSeCdyZn1−yS coreshell QDs are obtained.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication London Editor  
  Language Wos 000349325000004 Publication Date 2014-11-21  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1359-7345;1364-548X; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.319 Times cited 21 Open Access OpenAccess  
  Notes 262348 Esmi; Fwo; 246791 Countatoms; 335078 Colouratom; ECAS_Sara; (ROMEO:yellow; preprint:; postprint:restricted ; pdfversion:cannot); Approved Most recent IF: 6.319; 2015 IF: 6.834  
  Call Number c:irua:132582 Serial 1412  
Permanent link to this record
 

 
Author Kalidindi, S.B.; Wiktor, C.; Ramakrishnan, A.; Weßing, J.; Schneemann, A.; Van Tendeloo, G.; Fischer, R.A. pdf  doi
openurl 
  Title Lewis base mediated efficient synthesis and solvation-like host-guest chemistry of covalent organic framework-1 Type A1 Journal article
  Year 2013 Publication Chemical communications Abbreviated Journal (up) Chem Commun  
  Volume 49 Issue 5 Pages 463-465  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract N-Lewis base mediated room temperature synthesis of covalent organic frameworks (COFs) starting from a solution of building blocks instead of partially soluble building blocks was developed. This protocol shifts COF synthetic chemistry from sealed tubes to open beakers. Non-conventional inclusion compounds of COF-1 were obtained by vapor phase infiltration of ferrocene and azobenzene, and solvation like effects were established.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication London Editor  
  Language Wos 000312193100007 Publication Date 2012-11-06  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1359-7345;1364-548X; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.319 Times cited 17 Open Access  
  Notes 262348 Esmi Approved Most recent IF: 6.319; 2013 IF: 6.718  
  Call Number UA @ lucian @ c:irua:105953 Serial 1815  
Permanent link to this record
 

 
Author de Clippel, F.; Harkiolakis, A.; Ke, X.; Vosch, T.; Van Tendeloo, G.; Baron, G.V.; Jacobs, P.A.; Denayer, J.F.M.; Sels, B.F. pdf  doi
openurl 
  Title Molecular sieve properties of mesoporous silica with intraporous nanocarbon Type A1 Journal article
  Year 2010 Publication Chemical communications Abbreviated Journal (up) Chem Commun  
  Volume 46 Issue 6 Pages 928-930  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract Biporous carbonsilica materials (CSM) with molecular sieve properties and high sorption capacity were developed by synthesizing nano-sized carbon crystallites in the mesopores of Al-MCM-41.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication London Editor  
  Language Wos 000274070800024 Publication Date 2009-12-07  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1359-7345;1364-548X; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.319 Times cited 21 Open Access  
  Notes Fwo; Iap Approved Most recent IF: 6.319; 2010 IF: 5.787  
  Call Number UA @ lucian @ c:irua:80994 Serial 2182  
Permanent link to this record
 

 
Author Hadad, C.; Ke, X.; Carraro, M.; Sartorel, A.; Bittencourt, C.; Van Tendeloo, G.; Bonchio, M.; Quintana, M.; Prato, M. pdf  doi
openurl 
  Title Positive graphene by chemical design : tuning supramolecular strategies for functional surfaces Type A1 Journal article
  Year 2014 Publication Chemical communications Abbreviated Journal (up) Chem Commun  
  Volume 50 Issue 7 Pages 885-887  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract A diazonium based-arylation reaction was efficiently used for the covalent addition of 4-amino-N,N,N-trimethylbenzene ammonium to stable dispersions of few layer graphene (FLG) yielding an innovative FLG platform with positive charges to immobilize inorganic polyanions.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication London Editor  
  Language Wos 000328884500036 Publication Date 2013-11-08  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1359-7345;1364-548X; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.319 Times cited 19 Open Access  
  Notes Approved Most recent IF: 6.319; 2014 IF: 6.834  
  Call Number UA @ lucian @ c:irua:113733 Serial 2678  
Permanent link to this record
 

 
Author Meynen, V.; Beyers, E.; Cool, P.; Vansant, E.F.; Mertens, M.; Weyten, H.; Lebedev, O.I.; Van Tendeloo, G. pdf  doi
openurl 
  Title Post-synthesis deposition of V-Zeolitic nanoparticles in SBA-15 Type A1 Journal article
  Year 2004 Publication Chemical communications Abbreviated Journal (up) Chem Commun  
  Volume Issue Pages 898-890  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT); Laboratory of adsorption and catalysis (LADCA)  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Wos 000221124300084 Publication Date 2004-03-25  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1359-7345;1364-548X; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.319 Times cited 22 Open Access  
  Notes Approved Most recent IF: 6.319; 2004 IF: 3.997  
  Call Number UA @ lucian @ c:irua:44934 Serial 2684  
Permanent link to this record
 

 
Author Quintana, M.; Grzelczak, M.; Spyrou, K.; Kooi, B.; Bals, S.; Van Tendeloo, G.; Rudolf, P.; Prato, M. pdf  doi
openurl 
  Title Production of large graphene sheets by exfoliation of graphite under high power ultrasound in the presence of tiopronin Type A1 Journal article
  Year 2012 Publication Chemical communications Abbreviated Journal (up) Chem Commun  
  Volume 48 Issue 100 Pages 12159-12161  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract Under ultrasonication, the production of high quality graphene layers by exfoliation of graphite was achieved via addition of tiopronin as an antioxidant.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication London Editor  
  Language Wos 000311411100003 Publication Date 2012-10-09  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1359-7345;1364-548X; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.319 Times cited 39 Open Access  
  Notes This work was financially supported by the University of Trieste, INSTM, Italian Ministry of Education MIUR (cofin Prot. 20085M27SS) and by the "Graphene-based electronics'' research program of the Foundation for Fundamental Research on Matter (FOM). Part of this work was supported by funding from the ERC grant No 246791COUNTATOMS. MQ acknowledges the financial support from CONACyT CB-2011-01-166914 and FAI-UASLP. Approved Most recent IF: 6.319; 2012 IF: 6.378  
  Call Number UA @ lucian @ c:irua:105230 Serial 2724  
Permanent link to this record
 

 
Author Quintana, M.; Montellano, A.; Esau del Rio Castillo, A.; Van Tendeloo, G.; Bittencourt, C.; Prato, M. pdf  doi
openurl 
  Title Selective organic functionalization of graphene bulk or graphene edges Type A1 Journal article
  Year 2011 Publication Chemical communications Abbreviated Journal (up) Chem Commun  
  Volume 47 Issue 33 Pages 9330-9332  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract Graphene sheets have been functionalized with a PAMAM dendron, finding that graphene can be efficiently functionalized all over the surface, or only at the edges, depending on the reactions used in the functionalization process.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication London Editor  
  Language Wos 000293648200010 Publication Date 2011-07-20  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1359-7345;1364-548X; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.319 Times cited 84 Open Access  
  Notes Approved Most recent IF: 6.319; 2011 IF: 6.169  
  Call Number UA @ lucian @ c:irua:91892 Serial 2968  
Permanent link to this record
 

 
Author Verlooy, P.; Aerts, A.; Lebedev, O.I.; Van Tendeloo, G.; Kirschhock, C.; Martens, J.A. doi  openurl
  Title Synthesis of highly stable pure-silica thin-walled hexagonally ordered mesoporous material Type A1 Journal article
  Year 2009 Publication Chemical communications Abbreviated Journal (up) Chem Commun  
  Volume Issue 28 Pages 4287-4289  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract Hexagonally ordered mesoporous silica with a very narrow mesopore size distribution and exceptionally high stability paired with unusually thin pore walls was prepared using piperidine and cetyltrimethylammonium bromide.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication London Editor  
  Language Wos 000267808000040 Publication Date 2009-06-09  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1359-7345;1364-548X; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.319 Times cited 17 Open Access  
  Notes Approved Most recent IF: 6.319; 2009 IF: 5.504  
  Call Number UA @ lucian @ c:irua:77684 Serial 3457  
Permanent link to this record
 

 
Author Colomer, J.-F.; Bister, G.; Willems, I.; Konya, Z.; Fonseca, A.; Van Tendeloo, G.; Nagy, J.B. pdf  doi
openurl 
  Title Synthesis of single wall carbon nanotubes by catalytic decomposition of hydrocarbons Type A1 Journal article
  Year 1999 Publication Chemical communications Abbreviated Journal (up) Chem Commun  
  Volume Issue Pages 1343-1344  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Wos 000082398800037 Publication Date 2002-07-26  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1359-7345;1364-548X; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.319 Times cited 110 Open Access  
  Notes Approved Most recent IF: 6.319; 1999 IF: 3.477  
  Call Number UA @ lucian @ c:irua:29719 Serial 3459  
Permanent link to this record
 

 
Author Ying, J.; Hu, Z.-Y.; Yang, X.-Y.; Wei, H.; Xiao, Y.-X.; Janiak, C.; Mu, S.-C.; Tian, G.; Pan, M.; Van Tendeloo, G.; Su, B.-L. pdf  url
doi  openurl
  Title High viscosity to highly dispersed PtPd bimetallic nanocrystals for enhanced catalytic activity and stability Type A1 Journal article
  Year 2016 Publication Chemical communications Abbreviated Journal (up) Chem Commun  
  Volume 52 Issue 52 Pages 8219-8222  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract A facile high-viscosity-solvent method is presented to synthesize PtPd bimetallic nanocrystals highly dispersed in different mesostructures (2D and 3D structures), porosities (large and small pore sizes), and compositions (silica and carbon). Further, highly catalytic activity, stability and durability of the nanometals have been proven in different catalytic reactions.  
  Address State Key Laboratory Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122, Luoshi Road, Wuhan, 430070, China. xyyang@whut.edu.cn  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Wos 000378715400006 Publication Date 2016-05-16  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1359-7345 ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.319 Times cited 19 Open Access  
  Notes This work was supported by NFSC (51472190 and 51503166), ISTCP (2015DFE52870), PCSIRT (IRT15R52) of China, and the Integrated Infrastructure Initiative of EU (312483-ESTEEM2).; esteem2jra4 Approved Most recent IF: 6.319  
  Call Number c:irua:134660 c:irua:134660 Serial 4110  
Permanent link to this record
 

 
Author Wang, L.; Hu, Z.-Y.; Yang, X.-Y.; Zhang, B.-B.; Geng, W.; Van Tendeloo, G.; Su, B.-L. url  doi
openurl 
  Title Polydopamine nanocoated whole-cell asymmetric biocatalysts Type A1 Journal article
  Year 2017 Publication Chemical communications Abbreviated Journal (up) Chem Commun  
  Volume 53 Issue 49 Pages 6617-6620  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract Our whole-cell biocatalyst with a polydopamine nanocoating shows high catalytic activity (5 times better productivity than the native cell) and reusability (84% of the initial yield after 5 batches, 8 times higher than the native cell) in asymmetric reduction. It also integrates with titania, silica, and magnetic nanoparticles for multi-functionalization.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication London Editor  
  Language Wos 000403572100018 Publication Date 2017-05-25  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1359-7345; 1364-548x ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.319 Times cited 15 Open Access OpenAccess  
  Notes ; This work was supported by PCSIRT (IRT_15R52), NSFC (U1663225, U1662134, 51472190, 51611530672, 51503166), ISTCP (2015DFE52870), HPNSF (2016CFA033), CNPC (PPC2016007) and the China Scholarship Council (CSC). We thank Prof. Damien Hermand (URPhyM in UNamur) for help with cell culture, Ms Noelle Ninane (Narilis in UNamur) for help with CLSM characterization and Ms Siming Wu (WHUT) for help with magnetic property characterization. ; Approved Most recent IF: 6.319  
  Call Number UA @ lucian @ c:irua:144185 Serial 4681  
Permanent link to this record
 

 
Author Gholampour, N.; Chaemchuen, S.; Hu, Z.-Y.; Mousavi, B.; Van Tendeloo, G.; Verpoort, F. pdf  url
doi  openurl
  Title Simultaneous creation of metal nanoparticles in metal organic frameworks via spray drying technique Type A1 Journal article
  Year 2017 Publication Chemical engineering journal Abbreviated Journal (up) Chem Eng J  
  Volume 322 Issue Pages 702-709  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract In-situ fabrication of palladium(0) nanoparticles inside zeolitic imidazolate frameworks (ZIF-8) has been established via one-step facile spray-dry technique. Crystal structures and morphologies of the Pd@ZIF-8 samples are investigated by powder XRD, TEM, SAED, STEM, and EDX techniques. High angle annular dark field scanning transmission electron microscopy (HAAD-STEM) and 3D tomographic analysis confirm the presence of palladium nanoparticles inside the ZIF-8 structure. The porosity, surface area and N-2 physisorption properties are evaluated for Pd@ZIF-8 with various palladium contents. Furthermore, Pd@ZIF-8 samples are effectively applied as heterogeneous catalysts in alkenes hydrogenation. This straightforward method is able to speed up the synthesis of encapsulation of metal nanoparticles in metal organic frameworks. (C) 2017 Elsevier B.V. All rights reserved.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Lausanne Editor  
  Language Wos 000401594200069 Publication Date 2017-04-19  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1385-8947; 0300-9467 ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 6.216 Times cited 14 Open Access OpenAccess  
  Notes ; The authors would like to express their deep accolade to “State Key Laboratory of Advanced Technology for Materials Synthesis and Processing” for financial support. S.C. appreciates of the National Natural Science Foundation of China (303-41150231), the Fundamental Research Funds for the Central Universities (WUT: 2016IVA092) and the Research Fund for the Doctoral Program of Higher Education of China (471-40120222). N.G. thanks the Chinese Scholarship Council (CSC) for her Ph.D. study grant 2013GXZ985. Z.-Y. H and G. V.T. acknowledge the support from the EC Framework 7 program ESTEEM2 (Reference 312483). ; Approved Most recent IF: 6.216  
  Call Number UA @ lucian @ c:irua:144152 Serial 4686  
Permanent link to this record
 

 
Author Abakumov, A.M.; Batuk, D.; Hadermann, J.; Rozova, M.G.; Sheptyakov, D.V.; Tsirlin, A.A.; Niermann, D.; Waschowski, F.; Hemberger, J.; Van Tendeloo, G.; Antipov, E.V. doi  openurl
  Title Antiferroelectric (Pb,Bi)1-xFe1+xO3-y perovskites modulated by crystallographic shear planes Type A1 Journal article
  Year 2011 Publication Chemistry of materials Abbreviated Journal (up) Chem Mater  
  Volume 23 Issue 2 Pages 255-265  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract We demonstrate for the first time a possibility to vary the anion content in perovskites over a wide range through a long-range-ordered arrangement of crystallographic shear (CS) planes. Anion-deficient perovskites (Pb,Bi)1−xFe1+xO3−y with incommensurately modulated structures were prepared as single phases in the compositional range from Pb0.857Bi0.094Fe1.049O2.572 to Pb0.409Bi0.567Fe1.025O2.796. Using a combination of electron diffraction and high-resolution scanning transmission electron microscopy, we constructed a superspace model describing a periodic arrangement of the CS planes. The model was verified by refinement of the Pb0.64Bi0.32Fe1.04O2.675 crystal structure from neutron powder diffraction data ((3 + 1)D S.G. X2/m(α0γ), X = [1/2,1/2,1/2,1/2], a = 3.9082(1) Å, b = 3.90333(8) Å, c = 4.0900(1) Å, β = 91.936(2)°, q = 0.05013(4)a* + 0.09170(3)c* at T = 700 K, RP = 0.036, RwP = 0.048). The (Pb,Bi)1−xFe1+xO3−y structures consist of perovskite blocks separated by CS planes confined to nearly the (509)p perovskite plane. Along the CS planes, the perovskite blocks are shifted with respect to each other over the 1/2[110]p vector that transforms the corner-sharing connectivity of the FeO6 octahedra in the perovskite framework to an edge-sharing connectivity of the FeO5 pyramids at the CS plane, thus reducing the oxygen content. Variation of the chemical composition in the (Pb,Bi)1−xFe1+xO3−y series occurs mainly because of a changing thickness of the perovskite block between the interfaces, that can be expressed through the components of the q vector as Pb6γ+2αBi1−7γ−αFe1+γ−αO3−3γ−α. The Pb, Bi, and Fe atoms are subjected to strong displacements occurring in antiparallel directions on both sides of the perovskite blocks, resulting in an antiferroelectric-type structure. This is corroborated by the temperature-, frequency-, and field-dependent complex permittivity measurements. Pb0.64Bi0.32Fe1.04O2.675 demonstrates a remarkably high resistivity >0.1 T Ω cm at room temperature and orders antiferromagnetically below TN = 608(10) K.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Washington, D.C. Editor  
  Language Wos 000286160800018 Publication Date 2010-12-23  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0897-4756;1520-5002; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 9.466 Times cited 29 Open Access  
  Notes Approved Most recent IF: 9.466; 2011 IF: 7.286  
  Call Number UA @ lucian @ c:irua:88651 Serial 136  
Permanent link to this record
Select All    Deselect All
 |   | 
Details
   print

Save Citations:
Export Records: