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陈 葳,副教授

 

Email: weichen@nju.edu.cn

Tel: (025)83686136

陈葳 教授

Associate Prof. Wei Chen

2005-present                Associate Professor, Nanjing University

2003-2005                    Lecturer, Nanjing University

1998-2003                    Doctoral candidate in Polymer Science, Nanjing University

1994-1998                    B.Sc. in School of Chemistry and Chemical Engineering , Nanjing University

         陈葳 副教授、硕士生导师。1998年和2003年分别获得南京大学高分子专业学士和博士学位,2003年至今在南京大学化学化工学院高分子系工作。2005年起任南京大学化学化工学院副教授,主要从事导电高分子的设计合成及功能高分子复合材料的制备及其性能研究;采用表面增强拉曼散射技术(SERS)研究金属表面的化学反应以及有机分子和高分子在金属表面的吸附与取向;进行高分子/金属界面相的分子设计等。

 

Research Interests

Controllable synthesis and performance study of conducting polymers and corresponding functional composites

Synthesis conducting polymers with special nanostructure controllably is the base of applications. The existing methods for synthesis conducting polymers with two dimensional nanostructures need special instruments or complex preparation and post processing. We processed in situ polymerizing reaction in the presence of  precipitated surfactant crystallites. The conducting polymers grew along the screw dislocations of surfactant crystallites and replicated the planar spiral morphology. The surfactant crystallites templates have both the high stability of hard templates, and the merits of soft templates such as good controllability and facile post treatment. We controllably synthesized a series of two dimensional nanostructured conducting polymers from planar spirals to clips by choosing appropriate polymerization system and polymerization conditions.

We also achieved controllable synthesis of polypyrrole/gold composites with three dimensional nanostructures by using surfactant architecture as soft templates.

The interaction between reaction intermediate and surfactants makes polypyrrole and gold nanopartiles selective deposit and orientated grow simultaneously. The resulted polypyrrole/gold composites have surface enhanced raman scattering effect. The sensors made from such composites have good application prospects in the fields of transduction, detection and catalysis.

Characterization of absorption and orientation of ligands and polymers on metal surface

The surface of gold nano materials is normally covered by a layer of protective ligands which influence the surface behavior of gold directly. Obtaining information from surface ligands is one of the research focus. We applied surface enhanced raman scattering (SERS) technology to study the absorption and orientation of ligands and polymers on the surface of gold nanoparticles. By comparing the SERS difference of diphenyl disulfide on different size of gold nano particles, we found the curvature radius of gold nanoparticles influence the orientation of ligands directly. The plane of benzene ring of adsorbed ligands is inclined to be parallel with SERS substrate when the gold nanoparticles have smaller curvature radius . On the contrary, ligands is inclined to be vertical with SERS substrate when the gold nanoparticles have bigger curvature radius.

 

Selected Publications

1.   Confinement-Induced Deviation of Chain Mobility and Glass Transition Temperature for Polystyrene/Au Nanoparticles,  Lili Zhu, Xiaoliang Wang, Qiang Gu, Wei Chen, Pingchuan Sun, and Gi Xue, Macromolecules, 2013, 46 (6), 2292–2297.

2.   Synthesis of ordered spiral and ring-like polypyrrole nanowires in cetyltrimethylammounium bromide crystalline suspension, Yong Wang, Chunhong Yu, Zhen Li, Dongshan Zhou, Wei Chen, Gi Xue, Colloid Polymer Sci., 2009, 287 ( 11 ): 1325-1330. 

3.   Synthesis of Conducting Polymer Spiral Nanostructures Using a Surfactant Crystallite Template, Yong Wang, Wei Chen, Dongshan Zhou, Gi Xue, Macromolecular Chemistry and Physics, 2009, 210( 11) 936-941.

4.   Structural relaxation of polystyrene glasses with dis-interpenetrated chains studied by differential scanning calorimetry, Wei Chen, Wei Jiang, Fangfang Tao, Gi Xue, Xiaoning Liu, J. Macromolecular Sci. B-Phys, 2008,  47(4),794-799.

5.   Preparation of Size Controllable Polypyrrole Submicro-Capsules Using SEBS Copolymer as the Building Blocks, Shuangjun Chen, Wei Chen, Zhihuai Si, Dongshan Zhou, Gi Xue, Macromolecular Rapid Communication., 2006, 27(5), 328-332.

6.   Low Potential Electrochemical Syntheses of Heteroaromatic Conducting Polymers in a Novel Solvent System Based on Trifluroborate-Ethyl Ether, Wei Chen, Gi Xue, Progress in Polymer Science., 2005, 30(7),783-811.

7.   Ordered Conducting Polypyrrole Doped with Sulfopropyl ether of β-cyclodextrin, Wei Chen, Xiaobo Wan, Ning Xu, Gi Xue, Macromolecules., 2003, 36, 276-278.



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