Search results

The enhanced microwave absorption properties are also believed to be due to the unique core–shell structure.All results indicate that these Ni@TiO2 microspheres may be attractivecandidate materials for electromagnetic wave absorption applications.
The good EM wave absorption properties of the target products are attributed to efficient complementarities between the dielectric loss and magnetic loss, unique core-shell structure.
Summary In summary, the core-shell structures with Ni cores and amorphous TiO2 shell were successfully synthesized via a facile one-pot and mildsolvothermalreduction process.
Jin, Porous Fe3O4/SnO2 core/shell nanorods: Synthesis and electromagnetic properties, The Journal of Physical Chemistry C 113 (23) (2009) 10061-10064
Che, et al., Hierarchical magnetic yolk-shell microspheres with mixed barium silicate and barium titanium oxide shells for microwave absorption enhancement, Journal of Materials Chemistry 22 (18) (2012) 9277-9284

By further extending this strategy, it should be possible to control the number and location of metal ions incorporated into dendrimer structures, which might and uses as tailored catalysts or building blocks for advanced materials.
Dendritic macromolecules having a sphere-like and rigid structure make it easy to prepare a homogeneous film by casting.
TPM-DPAG4 undergoes a stepwise radial complexation from the inner imines, allowing perfect control of the number of metallic components encapsulated in the cage-like structure.
Sonoi
, Nature Chemistry, 1, 397-402 (2009) [Highlighted in C&En (ACS), Chemistry World (RSC)]
　 [3] K.

Fig. 1 shows the topological structure of KIII network, in accordance with the anatomic architecture of olfactory neural system.
The topological structure of the KIII network The parameters in KIII network, such as connection strength values between different nodes, were optimized to fulfill features observed in lots of electro-physiological experiments Combination of KIII Model and SVM .
Different from the BP neural network whose structure has to be artificially designed, SVM automatically determines the required number of hidden units (the number of support vectors, SV).
[3] Karunakaran C., Jayas D.S., White N.D.G.: Cereal Chemistry Vol. 80 (2003), p. 553-557
[9] Martí M.P., Busto O., Guasch J., Boqué R.: TrAC Trends in Analytical Chemistry Vol. 24 (2005), p. 57-66

Synthesis of "Main - Chain" Type Polyimide Matrix with a Chemically Bound Azo Group Anton Georgiev1, a , Velichka Strijkova2, b , Dean Dimov2,c , Erinche Spassova2.d , Jacob Assa2,e , Gencho Danev2,f 1 University of Chemical Technology and Metallurgy, Department of Organic Chemistry, Blvd.
Such a structure accounts for the flat configuration of the σ- skeleton at the functional group and an angular situation of the substitutes to it.
The structure and the spectral properties of the obtained Azo-PI polymer present promising and attractive prerequisites for their successful usage as polymer matrices in the formation of nanostructured layers with a possibility for optical recording and other optical devices [5].
Rochon: Pure Applied Chemistry Vol. 76 (2004), p. 1479
Spassova: Journal of Molecular Structure Vol. 888 (2008), p. 214

Preparation and Crystallization of modifed Talc/Poly(L-Lactic acid) composites Lina Wang1, a and Fengjie Deng*,2,b 1 Department of Sciences, Nanchang institute of Technology, Nanchang, China 2, Department of Chemistry, Nanchang University, Nanchang, China aemail: echo.wwei@163.com. b email: 32838426@qq.com Keywords: composite; Talc; poly(L-lactic acid); crystallization Abstract.
Talc was the structure of trioctahedral phyllosilicate, because of its low cost, Talc was usually used as inorganic fillers to improve the mechanical properties of polymers [5].
Ltd., L-lactic acid was purchased from Aladdin chemistry Co.
This is mainly because the crystalline structure is not uniform.
During the heating process, the crystalline with less perfect structure will melt easily, and then the perfect crystalline melt in a higher temperature.

Synthesis of Carbon/Carbon Core/shell Nanofibers by Co-pyrolysis of Tetrahydrofuran and Ferrocene Wenjun Kang1,a, Haibo Li1,2,b, Yan Yan1,c and Yitai Qian1,d,* 1Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P.
China 2Department of Chemistry, Liaocheng University, Liaocheng, Shandong 252059, P.
According to the stacking orientation of graphite sheets, carbon nanofibers can be divided into herringbone, tubular, and platelet structure, and their configuration strongly depends on the synthesis conditions.
Insets of (c) and (d) show a schematic structure and an electron diffraction (ED) pattern of a typical nanofiber, repectively.
The HRTEM image in Fig. 2c reveals that the as-prepared carbon nanofibers exhibit a novel core/shell structure, which originates from the different stacking orientation of graphene layers (inset of Fig. 2c).

Curing Process of epoxy Resin Using Low Molecular Polyamide 651 as Curing Agent Chunhua Han2, a, Lin Wang2, b, Dongyu Zhao1, 2,C,* 1 Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion, College of Heilongjiang Province, Harbin, China 2 School of Chemistry and Materials Science, Heilongjiang University, Harbin, China ahanchunhua11@163.com, b973196253@qq.com, czhaodyu@aliyun.com Keywords: Epoxy resin; Low molecular polyamide 651 (PA651); Curing time; Curing agent content; Dynamic mechanical behavior Abstract.
Epoxy resin can form three-dimensional network structure when adds the second component (curing agent), and become insoluble and infusible high polymer, and it appears excellent electrical insulation, chemical resistance, adhesion and a series of excellent performances.
The structure of epoxy resin cured by PA651 contains long carbon chain fatty acid and amino，and allows the cured product having high elasticity and adhesive strength and water resistance.
Line a, line b and line c corresponding Tg gradually increased and the internal friction peak is gradually reduced, this shows in the process of thermal curing and post-curing treatment that there are chemical reactions resulting thermosetting compound three-dimensional network structure has changed and a small amount of residual epoxy groups react with the curing agent.
[4] R.K Puri, V Kumar, M.P Mahajan, Mercury(II) ion recognition by newly synthesized oxadiazaphosphepine based receptors: coated graphite and polymeric membrane electrodes, inclusion phenomena and macrocyclic chemistry, 2011, 69(1-2):263-271

Synthesis of Dendritic Silver Nanostructures on Al foil by Galvanic Displacement for Catalytic Degradation of Methylene Blue Li Fu1a, Mika Matsunaka Sokiransky1 and Aimin Yu1 1 Department of Chemistry and Biotechnology, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn VIC 3122, Australia alifu@swin.edu.au Keywords: Silver dendrites; Reduced graphene oxide; Catalytic degradation; Methylene Blue Abstract.
Introduction Recently, much effort has been put to the synthesis of noble metal nanostructures, especially the silver hierarchical nanostructures consisting fractal dendritic structures have attracted considerable attention due to their unique optical, electronic and catalytic properties.
This asymmetric and long tailed absorption peak could indicate the formation of a supermolecular structure [2].
The crystalline structure of as-prepared Ag dendrites was anaylized by XRD and presents in Fig. 1b.
Kiani: Journal of Materials Chemistry A, 1 (2013), p. 9966

Introduction The olivine-structured LiFePO4 has a relatively large theoretical capacity of 170 mAh/g and has a moderate flat potential at 3.45 V versus Li+/Li.
Several approaches have been proven effective in improving the conductivity of the olivine-structured materials, including carbon coating of the LiFePO4[[].Kim J K, Cheruvally G, Ahn J H, et al.
Journal of Physics and Chemistry of Solids, 2008, 69: 2371-2377. ], doped with dispersed metal powders[[].Chung S Y , Jason TB, Chiang YM.
Progress in Chemistry. 2004，16（3）:335-342. ].
The peaks of the all kind of composites were corresponding to an olivine orthorhombic structure type (space group: Pnma).

Influence of Oxygen Plasma Pretreatment on Fabricating PEI/TiO2/SiO2 Multilayer Films Yanrong JIA1, 2, a, Jianzhong SHAO2, b and Qinguo FAN3, c 1Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China 2Engineering Research Center for Eco-Dyeing & Finishing of Textiles, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China 3Department of Bioengineering, University of Massachusetts Dartmouth, North Dartmouth, MA 02747, USA ajiayr102518@yahoo.com.cn, bjshao@zstu.edu.cn (corresponding author), cqfan@umassd.edu Keywords: Multilayer film; PEI/TiO2/SiO2; Plasma pretreatment; Structural color Abstract.
The results showed that this technique could be used in fabricating multilayer films from dilute solutions. 1 Introduction Structural colors are the result of the interaction of light with physical structures.
Some butterflies have multilayer thin films in their scales [2], and the structural color is manly produced by the interaction of light with certain quasi-periodic arrangements of subwavelength diffractive structures made of weakly conducting material [3].
(b) (a) Fig.5 Taping-mode AFM images (a) sample 2 (b) sample 1 4 Conclusions The special arrangement of the nanoparticle in a multilayer structure wound lead to the distinct optical phenomenon.
Acknowledgments The authors are grateful for the financial support provided by the National Natural Science Foundation of China (51073142), Key Laboratory of Advanced Textile Materials and Manufacturing Technology (ZSTU), Ministry of Education of China (2007QN07), Zhejiang Provincial Top Key Academic Discipline of Applied Chemistry and Eco-Dyeing & Finishing Engineering, and Zhejiang Provincial Key Innovation Team (2010R50038).