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Online since: May 2011
Authors: Bing Chen, Shao Qian Liu
Synthesis and Property of a New Symmetry Diarylethene
Bearing Benzene
Shaoqian Liu, Bing Chen*
1Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, P.
In this article, we simulated the structural features of left-handed material and designed a conjugate-structure organic molecular that is able to provide free-electron (Fig. 1).
The structure of DT was characterized by 1H NMR. 1H NMR (400 MHz, CDCl3, TMS): δ 7.35 (m, 10H, benzene-H), 7.51 (m, 8H, benzene-H).
Its molecular structure is in Fig. 2.
In this article, we simulated the structural features of left-handed material and designed a conjugate-structure organic molecular that is able to provide free-electron (Fig. 1).
The structure of DT was characterized by 1H NMR. 1H NMR (400 MHz, CDCl3, TMS): δ 7.35 (m, 10H, benzene-H), 7.51 (m, 8H, benzene-H).
Its molecular structure is in Fig. 2.
Online since: March 2007
Authors: Li Na Xu, Sheng Li Xie, Ning Gu
Fabrication of One-Dimensional Magnetic Particles Chain of
Polycrystalline Nickel under Magnetic Field
Xie.Shengli1,2,a, Xu.Lina
1,b
and Gu.Ning
1,c¶
1
Jiangsu Laboratory for Biomaterial and device, National Laboratory of Molecular and Biomolecular
Electronics, Research Center for Nano-scale Science and Technology, Southeast University;
Nanjing 210096, China
2
Department of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096, China
a
xshl1694@163.com, bxulina@seu.edu.cn, cguning@seu.edu.cn
Keywords: one-dimensional chain; nickel; magnetic field; reduction reaction
Abstract.
But it can also be concluded that the product was crystalline structure.
Figure 5.a presents the applied field parallel to the lengthwise direction of the self-assembled structure.
The magnetic field would be a determinant to the nanowires' structure, magnetic properties.
But it can also be concluded that the product was crystalline structure.
Figure 5.a presents the applied field parallel to the lengthwise direction of the self-assembled structure.
The magnetic field would be a determinant to the nanowires' structure, magnetic properties.
Online since: October 2006
Authors: Rositza Yakimova, Mikael Syväjärvi, Tangali S. Sudarshan, Arul Arjunan, Eugene Toupitsyn, Gholam Reza Yazdi
Sudarshan
2,f
1
Department of Physics, Chemistry and Biology, Linköping University, S-581 83 Linköping,
Sweden
2
Electrical Engineering Department, University of South Carolina, South Carolina, USA
a
msy@ifm.liu.se, broy@ifm.liu.se, cyazdi@ifm.liu.se, darjunan@engr.sc.edu,
e
evgueni@engr.sc.edu, f
sudarsha@engr.sc.edu
Keywords: Growth, Epitaxy, Non-conventional Surfaces, Thick Layers.
The understanding of interface states and carrier channel mobility are matters of great need in MOS structures to resolve the fundamental physical nature influencing the results.
The structure is composed of many elongated steps which are straight.
Since there is no off-cut in the substrate, one may not expect a similar hill-and-valley structure as in step-flow growth on offoriented )0001( substrates.
The understanding of interface states and carrier channel mobility are matters of great need in MOS structures to resolve the fundamental physical nature influencing the results.
The structure is composed of many elongated steps which are straight.
Since there is no off-cut in the substrate, one may not expect a similar hill-and-valley structure as in step-flow growth on offoriented )0001( substrates.
Online since: May 2004
Authors: E. Günister, S. İşçi, N. Öztekin, N. Güngör, F.B. Erim
Erim
2
1
Department of Physics, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey
2
Department of Chemistry, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey
Keywords:Bentonite,rheology,polyethyleneimine,polydimethyldiallylammonium chloride,polybrene,
cationic polymer.
The cationic structure polymers have been tied electrostaticly on the negative loaded surfaces of the clay particles and when the polymer covered particles approach each other sufficiently, their extending extensions to the environment have been wrapped around.
Thus the particles that have been tied each other by polymer bridges have formed pile structures in the environment.
The continuous increase is an indicator of a growing net structure in the environment. 0,01 0,1 2,8 3,0 3,2 3,4 3,6 3,8 4,0 4,20 PB PDDA PEI plastic viscosity ηpl (mPa.s) Concentrations (gr/l) Figure 1.
The cationic structure polymers have been tied electrostaticly on the negative loaded surfaces of the clay particles and when the polymer covered particles approach each other sufficiently, their extending extensions to the environment have been wrapped around.
Thus the particles that have been tied each other by polymer bridges have formed pile structures in the environment.
The continuous increase is an indicator of a growing net structure in the environment. 0,01 0,1 2,8 3,0 3,2 3,4 3,6 3,8 4,0 4,20 PB PDDA PEI plastic viscosity ηpl (mPa.s) Concentrations (gr/l) Figure 1.
The Preparation of TiO2 Nanoparticles and Wastewater in Paper Mill Treatment with TiO2 Nanoparticles
Online since: July 2011
Authors: Yan Zhu, Tao Lu, Hao Meng, Shuai Yuan
The crystal structure of the samples was analyzed by a D/MAX 2400 X-ray diffraction (XRD) made by Japan Physical Company.
1.4 TiO2 nanoparticles treated Wastewater in paper mill
The wastewater was obtained from Xi’an Wanlong paper mill.
Multicrystal ring in the XRD image indicated that the structure of TiO2 nanoparticles is multicrystal.
The peaks appeared at 25.45, 38.03 and 48.058 reflected for TiO2 nanoparticles which can be indexed to a pure anatase type structure TiO2 nanoparticles.
Soc, Vol. 99(14)(1977),p.4667-4675 [4] L Baorang, X H Wang, M Y Yan, et al.: Chemistry and Physics, Vol. 78 ( 1, 3) (2003),p.184-188 [5] Y H Chen, A Lin, F X Gan: Powder Technology, Vol.167(3)(2006),p.109-116 [6] K J Anal, K Prasad, A R Kulkarni, Colloids and Surfaces B: Biointerfaces, Vol.71(2)( 2009), p.226-229
Multicrystal ring in the XRD image indicated that the structure of TiO2 nanoparticles is multicrystal.
The peaks appeared at 25.45, 38.03 and 48.058 reflected for TiO2 nanoparticles which can be indexed to a pure anatase type structure TiO2 nanoparticles.
Soc, Vol. 99(14)(1977),p.4667-4675 [4] L Baorang, X H Wang, M Y Yan, et al.: Chemistry and Physics, Vol. 78 ( 1, 3) (2003),p.184-188 [5] Y H Chen, A Lin, F X Gan: Powder Technology, Vol.167(3)(2006),p.109-116 [6] K J Anal, K Prasad, A R Kulkarni, Colloids and Surfaces B: Biointerfaces, Vol.71(2)( 2009), p.226-229
Online since: April 2014
Authors: Ming Li, Guang Hui Wang, Jing Liu, Peng Fei Zhao
The contact stiffness is given by the following formula:
(7)
where is the body force per unit volume, A is average area of the structure elements connected to the structure node, K is bulk modulus and V is volume of the fluid material in the coupling containing the slave structure node.
Materials Chemistry and Physics, 2O02, 74: 132-l42
Materials Chemistry and Physics, 2O02, 74: 132-l42
Online since: April 2013
Authors: Na Zhang, Min Jie Zhou
Synthesis of SnO2 nanotubes as high performance energy storage material for photocathodic protection of metals
Na Zhang1, a and Minjie Zhou2 ,b
1School of Physics and Electronics, Hunan Institute of Science and Technology,
Yueyang, Hunan 414006, China
2School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, Hunan 414006, China
azn811218@163.com, bzmj0104@126.com
Keywords: SnO2 nanotubes; energy storage; photocathodic protection
Abstract.
Characterization The XRD patterns obtained on a D/max-Ш X-ray diffractometer were used to determine phase structure.
Results and Discussion 3.1 Phase structure The XRD pattern of the as-synthesized SnO2 nanotubes is shown in fig. 1.
This phenomenon shows that the SnO2 nanotubes possess the main characteristic of the tetragonal rutile structure.
Characterization The XRD patterns obtained on a D/max-Ш X-ray diffractometer were used to determine phase structure.
Results and Discussion 3.1 Phase structure The XRD pattern of the as-synthesized SnO2 nanotubes is shown in fig. 1.
This phenomenon shows that the SnO2 nanotubes possess the main characteristic of the tetragonal rutile structure.
Online since: April 2016
Authors: Rong Liu, Yi Fan Xu, Ling Chen Ji, Fei Ye, Hao Guan, Ming Yang
The results of XRD, BET and H2-TPR showed that surface structure of loaded catalyst was good for oxidation-reduction and denigration.
It is well known that ZrO2 exists mainly in three polymorphs with monoclinic (m-ZrO2), tetragonal (t-ZrO2) and (c-ZrO2) cubic structures[11].
The crystalline phase of ZrO2 has a great effect on the structure, activity and selectivity of catalysts.
[8] Reddy B M, Khan A, Yamada Y, et al: Journal of Physical Chemistry B, 2003, 107(22): 5162-5167
[9] Baidya T, Gupta A, Deshpandey P A, et al: Journal of Physical Chemistry C, 2009, 113(10): 4059-4068
It is well known that ZrO2 exists mainly in three polymorphs with monoclinic (m-ZrO2), tetragonal (t-ZrO2) and (c-ZrO2) cubic structures[11].
The crystalline phase of ZrO2 has a great effect on the structure, activity and selectivity of catalysts.
[8] Reddy B M, Khan A, Yamada Y, et al: Journal of Physical Chemistry B, 2003, 107(22): 5162-5167
[9] Baidya T, Gupta A, Deshpandey P A, et al: Journal of Physical Chemistry C, 2009, 113(10): 4059-4068
Online since: September 2012
., the study of the physical, chemical and electronic
structure of thin samples and near-surface regions by Doppler broadening of positron annihilation
radiation.
The latter gives a review of large-scale user facilities worldwide and the development of intense pulsed beams of positrons with which to measure lifetimes and thus gain information, with some depth sensitivity, on the atomic-scale structure of thin layers and samples.
The importance of understanding defect structures in steels used or proposed for use in nuclear plant applications is underlined by two articles in this volume (by Kögler et al. and Butterling et al.), the former focusing on FeCrAl alloy strengthened by oxide dispersion, and the latter to irradiated FeCr alloys.
Metallic and compound oxides are currently candidates for many new applications, and positrons are again being used to probe their atomic, electronic and chemical structure with the view to understanding how these factors can influence their properties and hence performance.
Positron and Ps chemistry of polymers, extended to functional polymeric materials, is discussed in this volume by Kobayashi.
The latter gives a review of large-scale user facilities worldwide and the development of intense pulsed beams of positrons with which to measure lifetimes and thus gain information, with some depth sensitivity, on the atomic-scale structure of thin layers and samples.
The importance of understanding defect structures in steels used or proposed for use in nuclear plant applications is underlined by two articles in this volume (by Kögler et al. and Butterling et al.), the former focusing on FeCrAl alloy strengthened by oxide dispersion, and the latter to irradiated FeCr alloys.
Metallic and compound oxides are currently candidates for many new applications, and positrons are again being used to probe their atomic, electronic and chemical structure with the view to understanding how these factors can influence their properties and hence performance.
Positron and Ps chemistry of polymers, extended to functional polymeric materials, is discussed in this volume by Kobayashi.
Online since: May 2012
Authors: Fu Quan Guo, Zhi Yuan Hu, Bin Guo, Hao Liang
Three-photon Induced Optical Limiting of a Novel Multibranched Nonlinear Chromophore Containing Carbazole Moiety
Zhiyuan Hu1, a, Fuquan Guo1, Bin Guo2 and Hao Liang3
1Department of Materials Science and Engineering, Luoyang Institute of Science and Technology, Luoyang, Henan, 471023, China
2Department of Chemistry and Materials, Nanjing Forestry University, Nanjing,Jiangsu, 210037, China
3Department of Chemical Engineering, Huizhou University, Huizhou, Guangdong, 516007,China
afqgzl@163.com
Keywords: Three-photon Absorption, Carbazole, Multibranched Chromophore, Optical Limiting
Abstract.
It is essential to explore the chemical structure-nonlinear optical property relationship for this optical process which is fundamental to provide the basis for molecular engineering to maximize the strength of 3PA cross sections and is the key to the practical applications of 3PA technology.
Organic nonlinear optical materials are promising for their short response time and easily tailored structures which can be designed to respond to certain range of laser wavelengths.
From the structure-property relationship of nonlinear organic materials, the delocalization of π-electrons occurring in the conjugated molecules can lead to significant enhancement of the third-order optical nonlinearities.
Intramolecular symmetric charge transfer in the extended conjugated molecular structure of donor-π-donor should account for the large σ3 value.
It is essential to explore the chemical structure-nonlinear optical property relationship for this optical process which is fundamental to provide the basis for molecular engineering to maximize the strength of 3PA cross sections and is the key to the practical applications of 3PA technology.
Organic nonlinear optical materials are promising for their short response time and easily tailored structures which can be designed to respond to certain range of laser wavelengths.
From the structure-property relationship of nonlinear organic materials, the delocalization of π-electrons occurring in the conjugated molecules can lead to significant enhancement of the third-order optical nonlinearities.
Intramolecular symmetric charge transfer in the extended conjugated molecular structure of donor-π-donor should account for the large σ3 value.