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以聚丙烯酰胺(PAM)为模板,在液相中通过不同浓度的抗坏血酸还原硝酸银能够得到缠结的线状和树枝状银纳米结构.该方法合成条件温和(常温常压)、产率高、成本低、操作简单,并且得到了特殊形貌的缠结收光在谱一对起线的状线和状树银枝纳状米银结纳构.米通结过构透的射形电貌子和显性微质镜进(T行E了M)表,扫征描.研电究子表显明微,镜PA(SMEM对)线、拉形曼产光物谱的和形紫成外起?可了见决吸定性作用.在反应初期,大量新生成的银核被PAM链吸附,小颗粒逐渐长大,进而相连,导致生成了缠结的线状银纳米结构.另外,抗坏血酸的浓度越高,越不利于线状结构的生成.利用对巯基苯胺(PATP)为探针分子研究了银纳米结构的表面增强拉曼散射(SERS)活性,结果表明线状银纳米结构具有较强的表面增强拉曼散射效果.
Using polyacrylamide (PAM) as a template, tangled linear and dendritic silver nanostructures can be obtained by reducing silver nitrate with different concentrations of ascorbic acid in the liquid phase.The method has the advantages of mild conditions (room temperature and normal pressure), high yield , Low cost, simple operation, and got a special morphology of entangled light received in the spectrum of a pair of starting line and the shape of the silver tree nanometer silver nanostructure nanometer structure. Appearance and dominant micromirror into the (T line E M) of the table, sweep the scan. The electric research sub-table shows micro, mirror PA (SMEM) line, In the beginning of the reaction, a large number of newly formed silver nuclei were adsorbed on the PAM chains, and the small particles grew up and connected with each other, resulting in the formation of an intertwined linear silver nanostructure.In addition, ascorbic acid , The more detrimental to the formation of linear structures.The surface enhanced Raman scattering (SERS) activity of silver nanostructures was investigated by using p-AMPA as a probe molecule.The results showed that the linear silver nanostructures had more Strong surface enhanced Raman scattering effect.