Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: December 2010
Authors: Tao Feng, Dan Yu Jiang, Qiang Li, Hao Wu, Cheng Chen
Li1,b 1Department of Chemistry, East China Normal University, Shanghai 200062, PR China 2Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, PR China awuhao@mail.sic.ac.cn bQli@chem.ecnu.edu.cn Keywords: mechanochemical synthesis, Pb(Mg1/3Nb2/3)O3, aggregation Abstract.
As we know, the synthesis procedure of a material determines its structure and properties.
In view of that, some soft chemistry methods have been developed to synthesize Pb(Mg1/3Nb2/3)O3 materials, such as chemical co-precipitation [6,7] and sol-gel.
This paper reports this novel mechanochemical technique for synthesis of fine-grained perovskite structured PMN powders.
Conclusions This novel mechanochemical reaction procedure activated due to extrusion and shearing force, instead of collision and comminution, can directly prompt a rapid solid-state reaction to form the desired perovskite structured PMN powders.
Online since: July 2006
Authors: B.J. Drakulić, N. Katsaros, S.P. Sovilj, D.Lj. Stojić
Katsaros4,d 1 Faculty of Chemistry, P.O.
Box 158, 11001 Belgrade, Serbia and Montenegro 2 ICTM, Center of Chemistry, P.O.
Probe was the structure of the complex (2) optimized by the semi-empirical PM3 method.
The obtained optimized structures of the (1) and (3) complex are presented in Figs. 1-2.
Docking study between crystal structure of human serum-albumin (taken from the PDB) and optimized structure of complex (2) was performed in order to exemplify such an approach.
Online since: May 2020
Authors: Li Hui Zhang, Zhen Fa Liu, Sha Sha Wang, Yue Long Xu
The pore structure of the CAs was investigated by low-temperature N2 adsorption measurements.
The samples were imaged with SEM to evaluate their porous structure.
CA700 and CA800 were composed of spherical particles that aggregate together forming more compact, denser structure.
Structure of carbon aerogels were compared at different carbonization temperature.
Materials Chemistry and Physics. 138 (2013) 870
Online since: March 2010
Authors: Xiao Hui Wang, Ai Li Cui, Long Tu Li, Tie Yu Sun, Xiao Quan Zhang
Unusual Reuniting of Barium Titanate Nanoparticles Xiaoquan Zhang1,a, Xiaohui Wang1,b, Tieyu Sun1, Aili Cui2 and Longtu Li 1 1 State Key Lab of Advanced Ceramics & Fine Processing, Department of Materials Sciences & Engineering, Tsinghua University, Beijing, China, 100084 2 Department of Chemistry, Tsinghua University, Beijing, China, 100084 a zhang-xq04@mails.tsinghua.edu.cn, b wxh@mail.tsinghua.edu.cn Keywords: Barium titanate, unusual reuniting, oleic acid, self- assembly Abstract.
Barium titanate has perovskite structure[1].
And the structure of Barium titanate will change from cubic, tetragonal, orthorhombic and rhombohedra[2] as the temperature decreases.
The crystal structures of the particles were determined by X-ray diffraction (XRD) on a Rigaku 2500 X-ray diffractometer (CuKαradiation; Rigaku, Japan).
Davies, et al.: Supramolecular Chemistry, Vol. 18 (2006), p. 435-443.
Online since: December 2011
Authors: Tie Sheng Li, Wen Jian Xu, Yang Jie Wu, Tokuji Miyashita, Gong Zhao
Photolithography and Photochemical Reaction of Copolymer Containing Anthracene in Langmuir-Blodgett Films Wenjian Xu1,a, Tiesheng Li1,b*, Gong Zhao1c,Yangjie Wu1,d*, Tokuji Miyashita2,e 1Department of chemistry, Zhengzhou University; Henan Key Laboratory of Chemistry Biology and Organic Chemistry, Key Lab of Advanced Information Nano-Materials of Zhengzhou, Zhengzhou 450052, PR China 2Institute of multidisciplinary research for advanced materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan aemail:wjxu@zzu.edu.cn, bemail:lts34@zzu.edu.cn, cemail:410395942@qq.com, demail:wyj@zzu.edu.cn, eemail:miya@tagen.tohoku.c.jp Keywords: Photolithography; Langmuir–Blodgett (LB) films; Copolymer; Photochemical Reaction; photoresist Abstract.
The result showed that the irradiation with difference light wavelength leaded to changes of copolymer LB films in their chemical structure, concerning only the anthracence unit.
Maybe the new cycle with rather complicated structure attributed to the formation of photodimmers between anthracene.
Online since: October 2014
Authors: Yan Fang Hu, Xiao Dong Zhang, Ya Cheng Xing, Bo Qun Lin, Li Li Song, Zhao Guang Nie
The structure of the oxidized corn starch was characterized by IR.
The result of the analysis for the IR spectra showed the carboxyl was success introduced on the structure of the production.
Xidation of Primary Alcohol Groups of Naturally Occurring Polysaccharides with 2,2,6,6-Tetramethyl-1-Piperidine Oxoammonium Ion, Journal of Carbohydrate Chemistry,15 (1996) 819-830
[7] W.X.Han, W.Wang, W.J.Xu, Study on the selective oxidation of chitosan by TEMPO-NaOCl- NaBr and the structure of its productsSynthetic Technology and Application, 26. (2011), 8-10
[8] W.L.Qiu, Z.F.Wang, L.J.Huang, Progress on 2,2,6,6-Tetramethylpiperineoxyl-mediated Oxidation of the Primary Alcohol of Carbohydrate Chemistry, 70(2007) 29-33.
Online since: January 2000
Edited by: S. Hampshire, M.J. Pomeroy
Preparation and Crystal Chemistry of Nitrides and Oxynitrides. 2.
Online since: July 2015
Authors: Walter Krenkel, Florian Reichert, Nico Langhof
It was shown, that XPS is a surface selective method to determine the chemistry of carbon surfaces.
The carbon fiber surfaces and the change of surface chemistry were examined by XPS measurements (PHI 5600).
The carbon fibers were stored in nitrogen to prevent a change in surface chemistry between the pretreatment and the XPS measurement.
Rand, The effect of fibre–matrix interactions on structure and property changes during the fabrication of unidirectional carbon/carbon composites, Carbon 40 (2002) 817–834
Surface structure and chemistry, Carbon 34 (1996) 983–998
Online since: May 2021
Authors: Desmond E. Ighravwe, Daniel O. Aikhuele, Ojo Sunday Issac Fayomi, Godwin Akande
The molecular structure of the prepared inhibitor is shown in Figure 1 and its molecular mass is 347.389g/mol.
Chemistry Africa, 2(3), 463-470
Oriental Journal of Chemistry, 32(1), 295-304
International Journal of Industrial Chemistry, 8(4), 363-372
American Journal of Chemistry and Materials Science, 1(1), 1-6
Online since: January 2010
Edited by: Yuan Ming Huang
The information contained in this special volume will serve both as an educational aid and as a technical guide for anyone involved with liquid crystals from the viewpoint of materials science, physics, chemistry and information display.