银纳米结构的电化学制备及表面增强拉曼效应

利用电化学沉积的方法在氧化铟锡(ITO,Indium Tin Oxide)导电玻璃表面成功地制备出了形貌均一的银纳米结构.所制备银纳米结构的形貌和密度与前驱体AgNO₃的浓度、沉晶种电位、生长电位以及柠檬酸钠的加入均有着重要的关系,只有合理地设置这些参数才能制得形貌和密度均较为理想的银纳米粒子.此外以对巯基苯胺(p-ATP,p-aminothiophenol)为探针分子,在633 nm的激光激发下对银纳米结构进行了表面增强拉曼效应(SERS,Surface Enhanced Raman Scattering)的研究,结果表明其在SERS领域有着潜在的应用价值.

Electrochemical preparation of Ag nanostructures and their surface enhanced Raman scattering effects

Ag nanostructures were successfully prepared on indium tin oxide(ITO) surfaces through electrochemical deposition. These nanostructures possessed uniform morphology. The concentration of AgNO₃, the nucleation potential, the growth potential and the addition of sodium citrate greatly affected the morphology and density of the as-prepared Ag nanostructures. Only when these parameters were reasonably set could Ag nanostructures with well-defined morphology and considerable density be obtained. Investigation on surface enhanced Raman scattering(SERS) activities of the as-prepared Ag nanostructures was also carried out under 633 nm excitation, using p-aminothiophenol (p-ATP) as the probe molecule. The results show that they can serve as potential SERS substrates.