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Online since: October 2022
Authors: Zhen Yu Guan, Hua Ping Wang, Yu Mei Zhang
Acs Sustainable Chemistry & Engineering, 2017, 5(3):2181-2195
Applied Organometallic Chemistry, 2016
Russian Journal of Inorganic Chemistry, 2008,53(7):1146–1151
Structure and properties of liquid crystalline naphthalenediol copolyesters.
Structure and properties of liquid crystalline naphthalenediol copolyesters.
Online since: September 2011
Authors: Bin Yang, Tao Xu, Ming Zhe Shen
In our study, a new type of Pt/C membrane electrodes, PtCuLaOx heterogeneous structure, in which with developing different La content homogeneously dispersed on the surface of carbonaceous substrates was manufactured by Ion Beam Sputtering (IBS) technology, and also was treated by different annealing temperature in muffle furnace.
In our study, we would raises a new type of Pt/C membrane electrodes, PtCuLaOx heterogeneous structure, in which with developing different La content homogeneously dispersed on the surface of carbonaceous substrates was manufactured by IBS.
It could be seen that Pt(111), Pt(200) and Pt(220) were main diffraction peak of PtCuLaOx membrane, and could mean that the phase composition in these samples was all fcc crystal structure.
Anniyev, et al.: Nature Chemistry. 2 (2010), p. 454 [4] M.
Online since: September 2013
Authors: Aurelia Mandes, Rodica Vladoiu, Gabriel Prodan, Virginia Dinca
Growth and Characterization of the High Purity C-Mg Thin Films Obtained by Thermionic Vacuum Arc (TVA) Technology MANDES Aurelia1, a, VLADOIU Rodica1, b, DINCA Virginia1, c, and Prodan Gabriel1, d 1 Dep. of Plasma Physics, Faculty of Physics, Chemistry, Electronics and Oil Technology, Ovidius University, Mamaia 124, Constanta, 900527, Romania a amandes@univ-ovidius.ro, b rvladoiu@univ-ovidius.ro, c vdinca@univ-ovidius.ro, dgprodan@univ-ovidius.ro Keywords: Thermionic Vacuum Arc (TVA), C-Mg Thin Films, TEM, Wettability.
We investigated the growth and structure properties of C-Mg thin films obtained for the first time by Thermionic Vacuum Arc (TVA) deposition.
We use for indexing hexagonal structure for Mg [14], and cubic structure for MgO [15].
Online since: November 2016
Authors: Sigurd Schrader, Mauro Casalboni, Fabio de Matteis, Paolo Prosposito, Matteo Ciocci, Paolo di Nardo, Slava Ksenzov, Federico Mochi, Sonia Melino, Roberto Francini
We use an innovative composite material consisting of hydrogel with different molecular weight and with suitable accordion-like and woodpile structures in order to tailor stiffness and elasticity conferred to the final structure.
Tissue engineering approach consists in a combination of techniques, developed in the recent past in different scientific fields (medicine, biology, chemistry, physics and engineering) aimed to produce, starting from stem cells, portion of tissue, endowed with specific functionalities, able to restore, maintain, or improve damaged tissues or even whole organs.
We fabricated 3D structures exploiting a commercial overhead projector.
A 2PP 3D accordion-like structure is shown in Fig. 1b.
Figure 1: Optical images of a PEGda based structure synthesized by (a) 1PP process and (b) 2PP process.
Online since: May 2020
Authors: D.E. Zhivulin, Vladimir E. Zhivulin, O.V. Zaitseva
Soon there appeared works devoted to the study of high-entropic oxide systems with a more complex crystal structure.
The authors of [16-19] presented the results of the high-entropy phases creation with a perovskite structure.
A multicomponent (high-entropy) oxide phase with a spinel structure was obtained in [20].
It was assumed that the formation of phases with the structure of M-type hexaferrites is most likely for these systems.
Dragoe, Room temperature lithium superionic conductivity in high entropy oxides, Journal of Materials Chemistry A, 4 (2016) 9536-9541
Online since: October 2011
Authors: Jun Hong Liu, Ming Dou, Li Xiao Zhou, Kang Xie
Study on Optimized Conditions of Cellulose Degradation of Bermuda grass Junhong Liu 1,a, Ming Dou 2,Lixiao Zhou 1, Kang Xie 1 1Bio-engineering Department of Henan University of Urban Construction, Pingdingshan, Henan 467044, China 2Faculty of Chemical and material engineering of Hebi Vocational and Technical College,Hebi, Henan 458030, China aemail:ljhwtl@126.com Key words:Bermuda grass, cellulose, degradation, pretreatment Abstract: Biomass plays unprecedented role in energy structure, whose study focuses on technology reform, the study on exploring raw material is limited.
Chemistry and bioengineering Vol. 5 ( 2003) ,p.8-9
Online since: January 2018
Authors: Roger Borges, Juliana Marchi, Renata Deliberato Aspasio, Jairo Freitas da Silva Jr.
Sol-Gel Synthesis of Amorphous Silica Nanoparticles: Study of the Process Parameters Influence on Structure and Particle Size Distribution Renata Deliberato Aspasioa, Jairo Freitas da Silva Júnior, Roger Borges, Juliana Marchib Naturals and Humans Science Centre, Federal University of ABC Santo André –SP, Brazil arenata.aspasio@ufabc.edu.br, bjuliana.marchi@ufabc.edu.br Keywords: nanoparticles, amorphous silica, sol-gel synthesis Abstract.
Introduction The studies of silica particles nucleation and growth by sol-gel method started in the 1800s, noting that the hydrolysis of tetraethylorthosilicate (TEOS) in an acidic medium resulted in glass structure materials [1].
Ganguli: Journal of Materials Chemistry Vol. 10 (2000), p. 2289.
Online since: July 2012
Authors: Yue Liu, Ying Liu, Ting Jin Wang, Ying Liu, Xiao Jie Li
Mechanism for synthesizing barium hexagonal ferrite by sol-gel method Yue Liua, Tingjin Wangb, Ying Liu c, Xiaojie Lid, and Ying Liue, * College of Chemistry and Life Science, Shenyang Normal University, Shenyang 110034, PR China ayueliusd@163.com, b122816654@qq.com, c614324567@qq.com (Undergraduate), dxiaojie1322@126.com, eyingliusd@163.com Keywords: Sol-gel; barium ferrite; mechanism; synthesis.
The mechanism takes account of the structure of barium hexaferrite and the least structure change principle.
Sankaranarayanan et al [22] note that if a Ba2+ ion from the Ba layer together with an O2- ion (for charge compensation) are removed from the M-type structure, BaFe12Ol9 becomes Fe12O18, i.e.
They reasoned that the absence of Ba2+ ions would make the structure appear as a spinel-like structure (g-Fe2O3) since the M-type structure contains a hexagonal Ba layer sandwiched between spinel blocks.
Eq. 4 can be excluded as a rate determining step since the reactants and products have similar structures.
Online since: September 2014
Authors: Tan Wang, Yue Yu, Xi Wen Zhang, Dong Yu Zhao
Cu–Ni alloy nanoparticles supported on multiwalled carbon nanotubes composites with pre-treated multiwalled carbon Tan Wang 2,a, Yue Yu2,b, Xiwen Zhang2,c, Dongyu Zhao1,2,c 1 Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion, College of Heilongjiang Province, Harbin, China 2 School of Chemistry and Materials Science, Heilongjiang University, Harbin, China awt314177548@126.com, czhaody@aliyun.com Keywords: Carbon nanotubes; Cu-Ni alloy nanoparticles; Nanocomposite Abstract.Carbon nanotubes (CNTs) have aroused widespread concern for their unique structure and excellent properties in physical, chemical and mechanical.
The two distinct diffraction peaks for graphitic structure at 2θ=25º and 43º corresponding to the hkl reflections (002) and (101), respectively.
These peaks indicate that the intact graphitic structure wasn’t undestroyed after oxidized by strong acid.
Online since: February 2014
Authors: Hong Cheng Pan, Yan Bin Ren, Lin Chen
Synthesis and characterization of nanosized inorganic–organic hybrid between phosphotungstic acid and rhodamine 6G Yanbin Rena, Lin Chenb, and Hongcheng Panc College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, P.
The Keggin structure of PTA is maintained in the PTA-R6G hybrid nanoparticles, as demonstrated by FT-IR.
The IR spectrum of the PTA-R6G hybrid material also indicated the similar characteristic peaks to the Keggin structure of PTA[15-17].
Four characteristic IR absorption bands of PTA were also observed in the PTA-R6G nanoparticles, which demonstrate that the Keggin structure of PTA is maintained in the PTA-R6G nanoparticles.