银纳米颗粒的化学还原法制备简介及其应用

Brief introduction and applications on synthesis of silvernanoparticles by chemical reduction

银纳米颗粒的光学性能,如局域表面等离子体共振(Localized Surface Plasmon Resonance,LSPR)特性可通过其形貌、尺寸、外部介电环境的调控而实现变化。不同形貌的银纳米颗粒具有强弱不同的局域表面等离子体共振效应,从而表现出独特的光学性质。综述了利用化学还原法制备不同形貌的银纳米颗粒,主要包括柠檬酸钠还原法、多元醇法以及种子介导生长法,分析了这3种合成方法的机理和特点,将近年来不同形貌银纳米颗粒的研究进展进行了综述。最后介绍了不同形貌银纳米颗粒在表面增强拉曼散射(Surface-Enhanced Roman scattering,SERS)基底、催化、抗菌领域上的应用研究,并总结和展望了银纳米颗粒在合成和相关应用领域的发展前景。

The localized surface plasmon resonance(LSPR)of silver nanoparticles can be varied by adjusting their morphology,size and external dielectric environment.Silver nanoparticles with different morphologies show the localized surface plasmon resonance with different strength,thus demonstrating the unique optical properties.In this review,a variety of silver nanoparticels was prepared via chemical reduction methods,which included citrate reduction method,polyol process method,and seed-mediated growth method.The mechanism and characteristics of these methods were discussed.The research progress of silver nanoparticles with different morphologies in recent years was reviewed.Finally,their applications in the surface enhanced roman scattering(SERS)substrate,antibacterial,and catalysis were introduced,and the future development of silver nanoparticles in synthesis and related application fields was summarized and prospected.