以簡易金屬配位系統製備銀微/奈米結構及聚苯胺/銀複合材料

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以簡易金屬配位系統製備銀微/奈米結構及聚苯胺/銀複合材料

Synthesis of Ag Micro/Nano Structure and Polyaniline/Ag Complexes by Simple Metallic Coordination System

鍾承恩 , Masters　　Advisor：郭紹偉　　

繁體中文

PEDOT/PSS ；導電薄膜；多元醇法；鹼基；配位；銀奈米線；聚苯胺； Composite film ； Polyol process ； Bases ； Polyaniline ； Coordination ； Silver nanowire ； PEDOT/PSS

Abstract │ Reference (47) │ Altmetrics

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In this study, A method to synthesize silver nanowires at relatively low temperature is demonstrated by using bases to attract silver ions and help silver ions to reduce to silver  in polyol process. Here different bases in polyol process are asisted to the growth of silver nanowires, where bases play a role of the coordinate ion which grasp silver ions. In this case, ethylene glycol(EG) reduce silver ions to silver seeds first, then adding polyvinylpyrrolidone(PVP) to prevent silver seeds aggregating, finally adding bases to coordinate silver ions to help silver nanowires growing. SEM images indicate the different structures of silver in different bases. And XRD datas prove no other silver compounds is generated in the experiment. Silver nanostructures can be determined by UV-vis spectra because the surface plasmon resonance. We can see the UV-vis spectra of silver nanowires at 350 nm, and silver nanoparticle at 410~440 nm. The TEM images show the growth process of silver after adding the bases.
Because of the reductive ability of –NH and the ligand bond between lone pair of nitrogen and silver ions, we can obtain nano- and microstructure of silver with special morphologies by synthesizing polyaniline and Ag at the same time. We developed a simple self-assembly polymerization method for the synthesis of Polyaniline/Ag composite without doping any acid reagent. SEM images indicate that the morphology of Ag depended on concerntration of Ag is wire or sheet. And SEM images also show that the morphology of Ag is micro-particle when the system of polymerization is under rapid stirring. XRD images indicate that the peaks of polyanilne become lower as the amount of Ag+ increase, which means Ag+ inhibit the polymerization of polyaniline. XPS images indicate that the oxidation of –NH- to –N= proves the connection between Polyaniline and Ag+.
By blending the polyaniline/silver composite with PEDOT/PSS. We can obtain a recyclable conductive film of PEDOT/PSS where the polyaniline and silver are dispersed. The conductivity of the PEDOT/PSS is about 1~100 S/cm which is contributed by polyaniline.

Reference ( 47 ) 〈TOP〉

1. Chen, C. L.; Furusho, H.; Mori, H. Nanotechnology, 2009, 20, 405605
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3. Hochbaum, A. I.; Gargas, D.; Hwang, Y. J.; Yang, P. Nano Lett. 2009, 9, 3550-3554
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5. Xu, X. J.; Fei, G. T.; Wang, X. W.; Jin, Z.; Yu, W. H.; Zhang, L. D. Mater. Lett. 2007, 61, 19
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6. Zhang, D.; Qi, L.; Ma, J.; Cheng, H. Chem. Mater. 2001, 13, 2753
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7. Zhou, Y.; Yu, S. H.; Cui, X. P.; Wang, C. Y.; Chen, Z. Y. Chem. Mater. 1999, 11, 545-546
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