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Thermally stable polyimide/silica hybrid: synthesis, characterization and optical nonlinearity Guangyu Wu1, Cheng Yao2, and Fengxian Qiu3 Corresponding to: Guangyu Wu (gywuchem@163.com) 1 College of Food Science And Light Industry, Nanjing University of Technology, Nanjing 211816, China e-mail: gywuchem@163.com 2 College of Science, Nanjing University of Technology, Nanjing 210009, China e-mail: yaochengchem@163.com 3 School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China e-mail: fxqiuchem@163.com Keywords: Nonlinear optical; polyimide; hybrid material; electro-optic property Abstract.
FT-IR spectroscopy and 29Si NMR were used to characterize the structure of the hybrid.
The results revealed that Q 3, Q 4 and T 3 are the major microstructure elements in forming a network structure.
Results revealed that Q 3, Q 4 and T 3 were the major microstructures forming a network structure.
The Q 3, Q 4 and T 3 of the hybrid are the major microstructures forming the network structure.

Synthesis, Film Morphology and Performance of a functional polysiloxane containing polyether, epoxy and trifluoropropyl side groups Lifen Hao a, Qiufeng An, Wei Xu The Key Laboratory for Aids Chemistry and Technology of Light Chemical Industry of Ministry of Education, Shaanxi University of Science and Technology, Xian, 710021, P.
The chemical structure of PSA-PFMS was characterized by infrared spectrum (IR) and proton nuclear magnetic resonance (1H NMR).
Results show that PSA-PFMS can form an inhomogeneous and hydrophobic polysiloxane film with rough, scraggly and microscopic phase separation structures.
As is well known to us that the coarse and nano-micro grade structure like the aforesaid morphology will help a hydrophobic interface engender higher contact angles, furthermore, hydrophilic polyether and reactive epoxy groups imported into the polysiloxane molecule will improve its emulsifying and conjoint capacity.
PSA-PFMS can form an inhomogeneous and hydrophobic polysiloxane film with rough, scraggly and microscopic phase separation structures and possesses quite higher roughness and phase-separated morphology in its AFM images under microanalysis (Rq, 1.197 nm within the scanning 2μm×2μm areas).

The prepared powders have been characterized using transmission electron microscopy, Raman and FT-IR spectroscopy and x-ray diffraction in order the structure and the morphology of magnetite to be examined.
Magnetite (Fe3O4) belongs to the transition metal oxides and has an inverse cubic spinel structure where O2- ions are cubic close packed, the Fe2+ ions are in octahedral sites, and the Fe3+ ions are half in octahedral and half in tetrahedral sites [5].
XRD is an effective characterization to confirm the crystal structure of magnetite nanoparticles.
Chemical structure and homogeneity of the samples were evaluated by the FTIR spectra obtained in a Perkin Elmer GX-1 spectrophotometer.
Hristoforou, Cyclodextrin inclusion complexes as novel MOCVD precursors for potential cobalt oxide deposition, Applied Organometallic Chemistry, 24, pp. 112-121, 2010 [8] Z.

The layers were found to be nanocrystalline and have a nanoscale grain structure with parameters depending on the experimental conditions.
Introduction New physicochemical methods developed for the deposition of nanodimensional metal structures on solid substrates offer a basis for the future progress in microelectronic technology, heterogeneous catalysis, synthesis of novel optoelectronic materials, etc. [1–6].
The chemical composition and structure of deposited layers are illustrated by the data in Fig. 4.
These reflections correspond to a cubic structure with a lattice constant of a = 3.615 Å, which is characteristic of copper in the metallic state.
As the analysis the layers are nanocrystalline and have a nanoscale grain structure with parameters depending on the experimental conditions, and chemical composition with a predominant content of copper in the metallic state Cu0.

Basically, ceramic foam contains about 70 percent to 95 percent of open porosity and has a gyroid pore network structure [2].
In fact, gyroid structures have a high pore interconnectivity and large surface area [3].
A gyroid structures with the interconnected pores were observed.
As explained by Yasmin et.al [11], the ceramic foam has a hierarchical pore structure.
Huang, Novel method to optimize the structure of reticulated porous ceramics, J.

However, the structure of MoOx material prepared by sputtering techniques is strongly depending process condition and thus far there has been no systematic investigation of the sputtering parameters on MoOx structure.
The crystal structure of molybdenum oxide thin films are revealed in X-Ray diffractograms as shown in Fig. 2.
It can be seen that crystal structures of the films contain the orthorhombic phase of MoO3 with the expected peaks at 12.7°, 23.3°, 25.7° and 27.3°.
The structure of molybdenum oxide film are highly crystalline with MoO3 Orthorhombic crystal phase with oxygen to argon ratio are higher.
Rao: Materials Chemistry and Physics, Vol. 80 (2003), pp. 638–646

Referring to the values reported in standard card SS-NNNN 03-0888 the zinc oxide compound structure is wurtzite structure (hexagonal symmetry) with lattice parameters are a = b = 3.2488Ǻ, and c = 5.2054Ǻ.
That’s implied the structure of ZnO 1 before annealing process is monoclinic cubic.
Atom-atom zinc has been able to occupy at their own lattice to build a single phase structure.
Nanoparticles that have been formed show the elongated structure.
Journal of photochemistry and photobiology A: Chemistry 148. (2002) 177 – 182

The degree of crystallinity, skeleton structure and particles morphology of zeolite 4A samples were characterized by XRD,FT-IR,SEM,respectively.The results show that synthesized zeolite 4A samples were identical with commodity zeolite 4A.
Zeolite 4A is aluminosilicate based on the structures of SiO4 and AlO4[3],due to the uniform pore sizes and large surface areas, zeolites are very useful materials for a wide range of applications such as ion exchanger, molecular sieves, gas adsorbents and catalysts[4],etc.
Consequently,from the information presented here,we can confirmed the synthesized zeolite 4A samples were obtained from silicon tetrachloride in high purity, single structure,high crystallinity degree and intact crystal structure.
These samples featured high purity, single structure and excellent crystallinity degree.
[3] X.Querol,N.Moreno:submitted to International Journal of Coal Geology (2002) [4] K.S.Hui,C.Y.H.Chao:submitted to Microporous and Mesoporous Materials (2005) [5] Norihiro Murayama,Hideki Yamamoto,Junji Shibata:submitted to International Journal of Mineral Processing (2001) [6] Miki Inada,Yukari Eguchi,Naoya Enomoto:submitted to Fuel (2004) [7] Yang-Dong Wang,Le-Feng Fu,Da-Ming Jin, Jia-Lu Dong,Qin-Hua Xu:submitted to Chinese Journal of Inorganic Chemistry (2002),in chinese

Departments of Chemistry and Materials Science, University of Halle; Max Planck Institute, Mainz; Leibniz Institute of Polymer Research, Dresden.
From the nature of the correlation between free volume hole size and the specific volume in or close to the rubbery state (‘equilibrium specific volume – straight line in fig 1(b)) and in the glassy state (metastable structure), one may infer about the nature of packing density in the corresponding matrices (see also [2]).

The way by which corrosion proceeds in a given alloy is strongly dependent on both alloy chemistry and oxygen/sulphur partial pressures in the exposure environment.
Results As a result of preparing method the cobalt layer exhibited typical surface welding solidification structures.