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Online since: July 2011
Authors: Fu Wang, Wen Bin Cao, Yi Wei
Fig. 7(c) shows the TEM image and selected area diffraction (SAED) pattern (inserted in the image) of the individual SiC nanowire described in Fig. 2(a), which indicates a single crystalline structure of the nanowires.
Shi, Synthesis of silicon carbide nanowires by CVD without using a metallic catalyst Materials Chemistry and Physics, 100 (2006) 108-112
Shi, Synthesis of silicon carbide nanowires by CVD without using a metallic catalyst Materials Chemistry and Physics, 100 (2006) 108-112
Online since: October 2012
Authors: Lai Jun Lu, Ya Hong Sun, Xue Wang, Shu Hai Sun, Guo Qiang Chen
Introduction
Fluorine is one of the trace chemistry elements with wide distribution in the natural environment and with the close relevance to the health of human body.
A Pan-Kriging method was used for the analysis of the research areas, and the correlations and spatial structure was obtained.
A Pan-Kriging method was used for the analysis of the research areas, and the correlations and spatial structure was obtained.
Online since: November 2013
Authors: Shou Zhi Pu, Hong Jing Jia, Hong Liang Liu
Synthesis and Property of 1-(2,4-dimethoxyl-5-pyrimidinyl)-2-[2-methyl-5-(2-fluorophenyl)-3-thienyl]perfluorocyclopentene
Hongliang Liu, Hongjing Jia and Shouzhi Pu*
Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University
Nanchang 330013, P.R.China
pushouzhi@tsinghua.org.cn
Keywords: Diarylethene, Pyrimidine, Photochromism, Fluorescence
Abstract.
The structures of diarylethenes 1o were confirmed by 1H NMR (400 MHz, CDCl3, TMS): δ 2.29 (s, 3H, -CH3), 3.75 (s, 3H, -OCH3), 4.01 (s, 3H, -OCH3), 7.15-7.19 (m, 3H, benzene-H), 7.33 (s, 1H, thiophene-H), 7.53-7.54 (m, 1H, benzene-H), 8.35 (s, 1H, pyrimidine-H).
The structures of diarylethenes 1o were confirmed by 1H NMR (400 MHz, CDCl3, TMS): δ 2.29 (s, 3H, -CH3), 3.75 (s, 3H, -OCH3), 4.01 (s, 3H, -OCH3), 7.15-7.19 (m, 3H, benzene-H), 7.33 (s, 1H, thiophene-H), 7.53-7.54 (m, 1H, benzene-H), 8.35 (s, 1H, pyrimidine-H).
Online since: September 2014
Authors: Yukifumi Yoshida, Masayuki Otsuji, Hiroaki Takahashi, Jim Snow, Farid Sebaai, Frank Holsteyns, Paul W. Mertens, Masanobu Sato, Hajime Shirakawa, Hirofumi Uchida
Another issue is the formation of voids in the Ge substrate, at the interface of the spacer and the NiGe region, during the removal of the unreacted Ni using dilute HCl chemistry [4, 5].
(Around 60 samples were observed) Figure 6: X-TEM of the recess into the doped extension (=“trenching”) and spacer edge of the RMG structures after filling with the final gate stack materials.
(Around 60 samples were observed) Figure 6: X-TEM of the recess into the doped extension (=“trenching”) and spacer edge of the RMG structures after filling with the final gate stack materials.
Online since: July 2010
Authors: Hong Jie Wang, Lei Fan, Jian She Yue
The high-temperature properties are
influenced strongly by the chemistry constitution and microstructure of the grain-boundary phase.
As a result oxygen from the ambient oxidation and thermal oxidation diffuse into amorphous silicon nitride, the local amorphous SiOxNy is formed at the crystallization temperature and this amorphous structure appears to be formed by a random mixture of silicon atoms bonded to oxygen and nitrogen [5, 7, 8].
As a result oxygen from the ambient oxidation and thermal oxidation diffuse into amorphous silicon nitride, the local amorphous SiOxNy is formed at the crystallization temperature and this amorphous structure appears to be formed by a random mixture of silicon atoms bonded to oxygen and nitrogen [5, 7, 8].
Online since: June 2014
Authors: Zbyněk Keršner, Pavla Rovnaníková, Pavel Schmid
Effect of Cement Replacement by Zeolite on the Basic Mechanical Fracture Properties of Concrete: a Parametric Study
Pavla Rovnaníková1,a*, Pavel Schmid2,b and Zbyněk Keršner3,c
1Brno University of Technology, Civil Engineering Faculty, Institute of Chemistry, Veveří 331/95,
602 00 Brno, Czech Republic
2ditto, Institute of Building Testing
3ditto, Institute of Structural Mechanics
arovnanikova.p@fce.vutbr.cz, bschmid.p@fce.vutbr.cz, ckersner.z@fce.vutbr.cz
Keywords: concrete, zeolite, fracture test
Abstract.
[6] RILEM TC-50 FMC (Recommendation, 1985) Determination of the fracture energy of mortar and concrete by means of three-point bend test on notched beams, Materials & Structures, Vol. 18, 285-290.
[6] RILEM TC-50 FMC (Recommendation, 1985) Determination of the fracture energy of mortar and concrete by means of three-point bend test on notched beams, Materials & Structures, Vol. 18, 285-290.
Online since: January 2013
Authors: Erik Janzén, Anne Henry, Xun Li, Henrik Jacobson
Structural investigation of heteroepitaxial 3C-SiC grown on 4H-SiC substrates
Henrik Jacobson1,a, Xun Li2,b, Erik Janzén2,b, Anne Henry2,b
1 ISV, Linköping University, SE-601 74 Norrköping, Sweden
2 Department of Physics, Chemistry and Biology, Linköping University,
SE-581 83 Linköping, Sweden
a) henrik.jacobson@liu.se, b) xunli@ifm.liu.se, c) erija@ifm.liu.se, d) anhen@ifm.liu.se
Keywords: heteropepitaxy, 3C-SiC, XRD,
Abstract. 3C-SiC epilayers grown on Si-face nominally on-axis 4H-SiC substrate are characterized with X-ray diffraction techniques.
The structure of the 4H-SiC substrate has the repetition of ABCBA..ABCBA.
The structure of the 4H-SiC substrate has the repetition of ABCBA..ABCBA.
Online since: October 2013
Authors: Gang Liu, Xue Li, Jun Jie Song
Synthesis and Properties Study of 1-(2-cyano-1,5-dimethyl-4-pyrryl)-2-[2-methyl-5-(10-phen -anthrenyl)-3-thienyl]Perfluorocyclopentene
Xue Li, Junjie Song and Gang Liu*
Jiangxi Key Laboratory of Organic Chemistry Jiangxi Science and Technology Normal University
Nanchang 330013, P.R.China
Liugang0926@163.com
Keywords: Diarylethene; Phenanthrene; Photochromism; Fluorescence
Abstract.
The structures of diarylethenes 1a were confirmed by 1H NMR (400 MHz, CDCl3, TMS): δ 1.91 (s, 3H, -CH3), 2.09 (s, 3H, -CH3), 3.67 (s, 3H, -CH3), 6.99 (s, 1H, pyrrole-H), 7.20 (s, 1H, thiophene-H), 7.80 (s, 1H, phenanthrene-H ), 7.60-7.65 (m, 2H, phenanthrene-H), 7.68-7.73 (m, 2H, phenanthrene-H), 7.89 (d, 1H, J = 8.0, Hz phenanthrene-H), 8.12 (d, 1H, J = 8.0, phenanthrene-H), 8.70 (d, 1H, J = 8.0, phenanthrene-H), 8.77 (d, 1H, J = 8.0, phenanthrene-H).
The structures of diarylethenes 1a were confirmed by 1H NMR (400 MHz, CDCl3, TMS): δ 1.91 (s, 3H, -CH3), 2.09 (s, 3H, -CH3), 3.67 (s, 3H, -CH3), 6.99 (s, 1H, pyrrole-H), 7.20 (s, 1H, thiophene-H), 7.80 (s, 1H, phenanthrene-H ), 7.60-7.65 (m, 2H, phenanthrene-H), 7.68-7.73 (m, 2H, phenanthrene-H), 7.89 (d, 1H, J = 8.0, Hz phenanthrene-H), 8.12 (d, 1H, J = 8.0, phenanthrene-H), 8.70 (d, 1H, J = 8.0, phenanthrene-H), 8.77 (d, 1H, J = 8.0, phenanthrene-H).