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Online since: May 2014
Authors: Lei Guo
Characterization of MgxZn1-xO films grown by electrochemical deposition
Lei Guo*
School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, China
* cqglei@163.com
Keywords: electrodeposition, MgxZn1-xO thin films, photoluminescence
Abstract.
These films crystallized in hexagonal wurtzite structure with a preferential (002) orientation, i.e. c-axis orientation, along which the density of surface energy per plane is minimal.
There are E2 vibration modes with both thin films (Fig.3), this results show clearly that they are still wurtzite structure.
Cong, et al., Synthesis and structures of morphology-controlled ZnO nano- and microcrystals, Cryst.
Shi, et al., Electronic structure of ZnO and its defects, Sci.
These films crystallized in hexagonal wurtzite structure with a preferential (002) orientation, i.e. c-axis orientation, along which the density of surface energy per plane is minimal.
There are E2 vibration modes with both thin films (Fig.3), this results show clearly that they are still wurtzite structure.
Cong, et al., Synthesis and structures of morphology-controlled ZnO nano- and microcrystals, Cryst.
Shi, et al., Electronic structure of ZnO and its defects, Sci.
Online since: June 2010
Authors: Seiji Yokoyama, Nik Hisyamudin Muhd Nor, Shunsuke Hirano
So far, there are many studies of the
mechanochemistry for CaCO3, but those studies put a emphasis on the change in its crystal structure
[1-7].
The sample was observed by a SEM, and its crystal structure was analyzed by a XRD.
The crystal structures of the as received and the preheated CaCO3were calcite.
Summary The aragonite appeared in the CaCO3 of the calcite structure as the grinding proceeded.
Turkdogan: Physical Chemistry of High Temperature Technology(Academic Press, New York, NY (1980)), p.8.
The sample was observed by a SEM, and its crystal structure was analyzed by a XRD.
The crystal structures of the as received and the preheated CaCO3were calcite.
Summary The aragonite appeared in the CaCO3 of the calcite structure as the grinding proceeded.
Turkdogan: Physical Chemistry of High Temperature Technology(Academic Press, New York, NY (1980)), p.8.
Online since: October 2012
Authors: Ti Feng Jiao, Yuan Yuan Xing, Jing Xin Zhou, Adan Li
This suggested an organized structure of double molecules may be fabricated in the transferred LB films.
The introduction of different substituted groups into the present functional compound can lead to larger conjugated structures and new properties are expected.
Chemical structure of luminol derivative Lu-Ch.
In order to investigate the characteristic cholesteryl substituted groups in molecular structures, we have measured the FT-IR spectra of Lu-Ch multilayer films.
This suggested an organized structure of double molecules may be fabricated in the transferred LB films.
The introduction of different substituted groups into the present functional compound can lead to larger conjugated structures and new properties are expected.
Chemical structure of luminol derivative Lu-Ch.
In order to investigate the characteristic cholesteryl substituted groups in molecular structures, we have measured the FT-IR spectra of Lu-Ch multilayer films.
This suggested an organized structure of double molecules may be fabricated in the transferred LB films.
Online since: July 2013
Authors: Ji Huan He, Liang Wang, Lan Xu, Lu Feng Mo
As a result the Coulomb force might become big enough to dilate the jet to cause nanoporous structure on the surface.
The desired porous structure could be obtained by varying the applied voltage.
Experimental Poly(Butylenes Succinate-co-bytylene Terephthalate)(PBST) with a molecular weight of 20,000g/mol was supplied by Shanghai Institute of Organic Chemistry.
As a result the jet is dilated suddenly to cause nanoporous structure on the surface.
Tuan, F.K .Ko, Electrospun nanofibrous structure: A novel scaffold for tissue engineering, Journal of Biomedical Materials Research. 60 (2002) 613-621
The desired porous structure could be obtained by varying the applied voltage.
Experimental Poly(Butylenes Succinate-co-bytylene Terephthalate)(PBST) with a molecular weight of 20,000g/mol was supplied by Shanghai Institute of Organic Chemistry.
As a result the jet is dilated suddenly to cause nanoporous structure on the surface.
Tuan, F.K .Ko, Electrospun nanofibrous structure: A novel scaffold for tissue engineering, Journal of Biomedical Materials Research. 60 (2002) 613-621
Online since: May 2016
Authors: Ahmed El-Ghannam
The precipitation of the hydroxyapatite on the walls of the inner pores may block the nano pores and regulate drug diffusion from the core to the surface through the hierarchal porous structure.
In addition, previous studies have shown that the phase composition of the SCPC50 is in the form of solid solution due to point defects within the crystalline structure.
Cisplatin release kinetics from bioinert Cris ceramic is controlled by the porous structure and surface area of the carrier.
On the other hand, the surface chemistry of bioactive Rhe overruled the effect of surface area.
[2] Ahmed El-Ghannam, “Advanced Bioceramic Composite for Bone Tissue Engineering: Design Principles and Structure-Bioactivity Relationship”, Journal of Biomedical Materials Research, 1;69A(3):490-501 (2004) [3] Pacheco H, Vedantham K, Aniket, Young A, Marriott I, El-Ghannam A., “Tissue engineering scaffold for sequential release of vancomycin and rh-BMP2 to treat bone infections”.
In addition, previous studies have shown that the phase composition of the SCPC50 is in the form of solid solution due to point defects within the crystalline structure.
Cisplatin release kinetics from bioinert Cris ceramic is controlled by the porous structure and surface area of the carrier.
On the other hand, the surface chemistry of bioactive Rhe overruled the effect of surface area.
[2] Ahmed El-Ghannam, “Advanced Bioceramic Composite for Bone Tissue Engineering: Design Principles and Structure-Bioactivity Relationship”, Journal of Biomedical Materials Research, 1;69A(3):490-501 (2004) [3] Pacheco H, Vedantham K, Aniket, Young A, Marriott I, El-Ghannam A., “Tissue engineering scaffold for sequential release of vancomycin and rh-BMP2 to treat bone infections”.
Online since: January 2005
Authors: Stan Veprek, K. Moto
Veprek2
1
Jurusan Fisika FMIPA, Universitas Indonesia
Kampus Baru Depok, 16424, Jawa Barat, Indonesia
2
Institute for Chemistry of Inorganic Materials, Technical University Munich,
Lichtenbergstrasse 4, D-85747 Garching b.
Only the NaCl structure of (Ti1-xAlx)N is observed when x is less than 0.8.
Only for x ≥ 0.9 (i. e. for the stoichiometry (Ti0.1Al0.9)N) the würzite structure of AlN was also formed in addition to the NaCl one (see the upper diffraction pattern in Fig. 2).
This decrease of hardness found by Jarms et al as well as by others [4] was explained by structural change from the NaCl structure of TiN to the hexagonal würzite structure of AlN [5].
Only the NaCl structure of (Ti1-xAlx)N is observed when x is less than 0.8.
Only for x ≥ 0.9 (i. e. for the stoichiometry (Ti0.1Al0.9)N) the würzite structure of AlN was also formed in addition to the NaCl one (see the upper diffraction pattern in Fig. 2).
This decrease of hardness found by Jarms et al as well as by others [4] was explained by structural change from the NaCl structure of TiN to the hexagonal würzite structure of AlN [5].
Online since: February 2008
Authors: Rui Qing Chu, Zhi Jun Xu, S.C. Cui, Jin Son Zhang, Long Zhi Zhao
It has been proved that SrFeCo0.5Oy is multiphase
structure, and among them the perovskite phase is propitious to the oxygen permeability [5].
Our group [6, 7] prepared the material by using microwave heating and microwave mixed heating method, and found that the material exhibited different phase structures under the microwave field heating and normal heating.
The perovskite phase was the main phase in the multiphase structure.
In order to discover why the phase structure is different when synthesized by different methods using same reagent, rectangular cavity perturbation method combined with XRD was adopted to study the relationship between phase transition and MDL in the synthetic process of oxide SrFeCo0.5Oy.
Dai: Chemistry of Microwave, (Science Press, Beijing, China, 1999)
Our group [6, 7] prepared the material by using microwave heating and microwave mixed heating method, and found that the material exhibited different phase structures under the microwave field heating and normal heating.
The perovskite phase was the main phase in the multiphase structure.
In order to discover why the phase structure is different when synthesized by different methods using same reagent, rectangular cavity perturbation method combined with XRD was adopted to study the relationship between phase transition and MDL in the synthetic process of oxide SrFeCo0.5Oy.
Dai: Chemistry of Microwave, (Science Press, Beijing, China, 1999)
Online since: May 2014
Authors: Jie Wu, Li Liu, Zai Xing Jiang, Bo Jiang, Zhen Hu, Jie Hui Jing, Yu Dong Huang
Huang1,a
1School of Chemical Engineering and Technology, State Key Laboratory of Urban Water Resource and Environment Department of Applied Chemistry, Harbin Institute of Technology, China
2Heilongjiang University of Science and Technology, China
aydhuang.hit1@aliyun.com, b35692106@qq.com
Keywords: Coatings, Print quality, Inkjet material
Abstract.
The coatings thickness of inkjet materials was 25μm, 50μm, 75μm and 100μm, respectively (named as S_1, S_2, S_3 and S_4.).The basic structure of inkjet recording materials was shown in Fig. 1.
The basic structure of inkjet materials.
Fig. 4 shows the surface structure of the substrate and inkjet materials from the AFM images.
Bousfield, Print gloss development with controlled coating structures, J.
The coatings thickness of inkjet materials was 25μm, 50μm, 75μm and 100μm, respectively (named as S_1, S_2, S_3 and S_4.).The basic structure of inkjet recording materials was shown in Fig. 1.
The basic structure of inkjet materials.
Fig. 4 shows the surface structure of the substrate and inkjet materials from the AFM images.
Bousfield, Print gloss development with controlled coating structures, J.
Online since: June 2012
Authors: Bing Liu, Ai Min Li, Ming Fang Xia, Zhao Lian Zhu
They exhibit type I isotherms according, indicating the existence of microporous structure.
There is a sharp and intense peak at about 2θ =26°, which is identified with the typical spectrum of β-MnO2 phase (JCPDS, 24-0735)[6], besides two basic diffraction peaks(2θ=24° and 2θ=43°) on carrier [7]. β-MnO2 is the most stable structure in a variety of manganese (IV) oxides structural forms at low temperatures[8].
There are significant instrumental noises, indicating the MnOx on surface is of amorphous structure.
Manganese modification alters the physical and chemical structure of GAC, causing homogeneous manganese-containing active phase distribution.
Lu: submitted to Industrial and Engineering Chemistry Research (1997)
There is a sharp and intense peak at about 2θ =26°, which is identified with the typical spectrum of β-MnO2 phase (JCPDS, 24-0735)[6], besides two basic diffraction peaks(2θ=24° and 2θ=43°) on carrier [7]. β-MnO2 is the most stable structure in a variety of manganese (IV) oxides structural forms at low temperatures[8].
There are significant instrumental noises, indicating the MnOx on surface is of amorphous structure.
Manganese modification alters the physical and chemical structure of GAC, causing homogeneous manganese-containing active phase distribution.
Lu: submitted to Industrial and Engineering Chemistry Research (1997)
Online since: April 2014
Authors: Sharipah Nadzirah, Uda Hashim, N. Malihah
Thus, the aim of this study is to investigate the electrical properties of and the nanostructural features in two different TiO2 thin films in order to predict the structures based on electrical properties-nanostructure relationships.
In the XRD spectrum, “A” represents the anatase structure, “R” the rutile structure and “Si” for silicon substrate.
Both synthesized anatase and rutile structures at 500 oC.
Physical Chemistry Chemical Physics 11 (2009) 534-542
In the XRD spectrum, “A” represents the anatase structure, “R” the rutile structure and “Si” for silicon substrate.
Both synthesized anatase and rutile structures at 500 oC.
Physical Chemistry Chemical Physics 11 (2009) 534-542