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The measurements were performed on Р- Р-- Р+ experimental structures.
The mesa-structures with a diameter 100 µm were made by dry etching.
Another type of structures in two planar parallel stripes divided in 50mkm were fabricated on the surface of epitaxial P(Al)-layer with thick about 2 mkm and Na -Nd ~ 5х1018 см-3.
On the such structures investigations of Al impurity electrical breakdown were conducted at 77 K (Fig.3).
J-F characteristics of 6H-SiC P-P--P+ structure at different temperatures. 0 10 20 30 40 50 60 0,0 0,5 1,0 1,5 2,0 2,5 Current [A] Electrical field [kV/cm] 300K 77K Fig.3.

Introduction The wetting behavior of a solid surface is important for various industrialization applications and strongly depends on both the surface energy or chemistry and the surface roughness [1-6].
Li et al [9], Hohne et al [10], Li et al [11] have reported the formation of rough structures on an aluminum alloy surface by anodic oxidation.
After the surface free energy was decreased by self-assembly fabrication of the siloxane or cathodically adsorption of the chitosan or the modification of fluoroalkyl silanes on the rough structures surface, respectively.
Kim et al [13] reported the multiple-scaled structures by using a simple batch process based on an anisotropic chemical silicon etching process and a subsequent time-controlled anodic aluminum oxide technique.
Scanning electron microscopy (SEM, HITACHI-3000) at 20 kV was used to detect the surface structure.

Meanwhile, precise control of the chemical composition, crystal structure, size, shape of ternary chalcogenides might improve their unique properties or tune their chemical and physical properties as desired.
The microspheres with an open and puffy structure are expected to provide reactive sites and subsequently improve their visible light photocatalytic activities for the degradation of organic pullutants.
The pore size distribution curve (Fig. 4 ) calculated from the desorption branch of the nitrogen isotherm by the BJH method shows a narrow range of 3-11 nm, indicating the as-synthesized AgIn5S8 powders with mesoporous structures.
On the basis of the morphology and the pore size distribution analysis, the pompon-like structure of AgIn5S8 microspheres probably play a critical role in improving photocatalytic activity, for which may be the reactive sites and beneficial for the electron migration between the target pollutant and the photocatalyst.
Conclusions The pompon-like AgIn5S8 microspheres with cubic phase structure have been synthesized successfully via a simple, one-step solution route at low-temperature by using mercaptoacetic acid as capping agent and thioacetamide as sulfur source.

Micro phase separation structure between soft and hard segment in PU and strong hydrogen bonding between urethanes give PU many advantages.
Water-based PU 100W (soft segment) and 600WF (hard segment), ZhongDa Chemistry Technology CO., LTD.; Nano alumina, HangZhou WanJingXin material CO.
Microscopic structure was observed by SEM, and transmittance was measured by UV-visible spectrophotometer.
Microscopic structure of coating with different content of nano alumina.
Microscopic structure of coating with different content of nano alumina was observed under the magnification of 4000 times with SEM, gaining the pictures below.

Dimeric Liquid Crystalline Epoxy Resins Containing Azo Group: Mesogenic Behavior and Curing with Anhydride Zhou Dewen1,2,a, Liang Liyan1,b and Lu Mangeng1,c Correspondence to Lu Mangeng (mglu@gic.ac.cn) 1 Guangzhou Institute of Chemistry, Chinese Academy of Science, Guangzhou, People's Republic of China 2 Journal of the Graduate School of the Chinese Academy of Sciences, Beijing, People's Republic of China a zhoudewen@gic.ac.cn, b lyliang@gic.ac.cn, c mglu@gic.ac.cn Keywords: Liquid Crystalline Polymer, Azo, Mesogenic Behavior, Epoxy, Curing kinetics.
The chemical structure of liquid crystalline monomers Tetrahydrophthalic anhydride (THPA) was employed as the harder.
Like other twin LC compounds [10], the dimeric LC glycidylic monomers containing azobenzene also exhibit smectic structures.
The monomer E5E has an intercalated structure rather than a monolayer structure.
This kind of motion has to disturb the arrangement of intercalated structure, which need much higher energy.

Introduction Gas sensors for VOCs are a key technology in chemistry industry and food industry, and nanoscale semiconductor-based gas sensors have been widely investigated due to the excellent sensing properties [1-6].
All the diffraction peaks can be indexed to the tetragonal SnO2 with a rutile structure, belonging to the space group of P42/mnm according to the JCPDS file no. 41-1445.
According to Figs. 1b-c, the SnO2 nanocrystals obtained with SDS are of a hierarchical structure.
Summary SnO2 nanocrystals with a hierarchical structure (H-SnO2) have been synthesized via an SDS-aided hydrothermal method.
The hierarchical structure is more favorable in gas-sensing applications than the particle aggregations.

An open structure with corner shared tungstate polyhedra and ferric polyhedra can accommodate for the transverse thermal vibration and this results in NTE property in corner shared tungstates compared to the edge shared tungstates in monoclinic structure of Fe2Mo3O12 [14].
Cheng et al. found that substitution Er for Fe can decrease the phase transition temperature (344℃ for Er0.2Fe1.8Mo3O12 [16]), however, the substitution Er result in hydrate structure.
(2) Fe2Mo3O12 adopts monoclinic structure and shows positive thermal expansion from room temperature to about 500℃
Molecular Structure, Vol. 283-288 (2005), p. 744
Solid State Chemistry Vol. 173 (2003), p. 442 [8] X.L.

This scientific field investigates the relationship between the structure of materials at atomic or molecular scales and their macroscopicproperties.
It incorporates elements of applied physics and chemistry.
This article is motivated from the observation that standard methods in sa-mpling theory provide examples of multirsolution structure which are not FMRAs.
Inspired by [3] and [5], we introduce the notion of a generalized multiresolution structure (GMRS) of generated by several functions of inte ger translates in space.
We say that and generates a pair of dual wavelet frame if each of them generates a wavelet frame and , (6) The concept of trivariate generalized multiresolution structure Let be a positive integer, and be a finite index set.

The structure was shown by the Raman spectrum (Renieshaw invia) with the excitation wavelength 632.8nm and the power 35mw and X-ray diffraction (SHIMADZU XRD-6000).
The porous silicon structure was fabricated by electrochemical etching with different current density and the SEM images of samples surface are shown in Fig.1.
The porous layer has a loose structure compared to the bulk silicon.
SEM micrographs of sample surface:(a) reference sample, porous silicon structure fabricated by electrochemical etching with different current density (b) J=20mA/cm2 (c) J=30mA/cm2 (d) J=40mA/cm2.
There are no peaks of amorphous silicon near 480 cm-1 were observed in Raman spectrum, indicating that the crystalline structure of silicon remain unchanged.

Preparation of a Novel Chitosan-based Composite Nanofibers by Electrospinning Yin Zhang 1,a, Junfeng Li 1,2,b,*, Kehui Qiu1,c, Liangzhao Zhong1,d, Guanyu Li2,e, Xuefei Lai3,f, Peicong Zhang1, 2, g 1Institute of Material Science and Technology, Chengdu University of Technology, Chengdu 610059, China; 2Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, Chengdu University of Technology, Chengdu 610059, China; 3College of Chemical Engineering, Sichuan University, Chengdu 610065, China.
Furthermore, chitosan has a chemical structure similar to glycosaminoglycans in the extracellular matrices and possesses hemostatic activity, contributing to faster wound healing processes [4-6].
However, the electro spinnability of chitosan is limited mainly because of its polycationic nature in solution, rigid chemical structure and specific inter and intra-molecular interactions [7].Currently most chitosan-based of the electrospinning fibers are prepared by blending systems [8].
X-ray diffraction (XRD) was utilized to reveal the crystal structure of fibers.
The chemical structure of the nanofibers was characterized using Fourier Transform infrared spectroscopy (FITR) with wave number range of 600-4000cm-1.