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Au@Ag核壳纳米粒子由于具有优异的局部等离子共振性质(LSPR),近年来引起人们极大的关注,目前,在成像、催化、信息存储、生化传感等领域已经得到了广泛的应用。在制备Au@Ag核壳纳米粒子的方法中,种子生长法的应用最为广泛,因为它可以实现对Ag壳尺寸及形貌的有效控制。本文综述了影响Au@Ag核壳纳米粒子核壳结构尺寸、形貌、Ag壳厚度以及覆盖均匀程度的一些主要因素,包括Au种子的形貌和浓度、Ag NO3浓度、封端剂、还原剂以及其他一些影响因素。研究发现,Au@Ag核壳纳米粒子在表面增强拉曼光谱(SERS)方面具有广泛的应用前景。
Due to its excellent local plasmon resonance (LSPR), Au @ Ag core-shell nanoparticles have drawn great attention in recent years. At present, Au @ Ag core-shell nanoparticles have been widely used in imaging, catalysis, information storage and biochemical sensing. In the method of preparing Au @ Ag core-shell nanoparticles, the seed growth method is the most widely used method because it can effectively control the size and morphology of the Ag shell. This review summarizes some of the major factors affecting the size, morphology, shell thickness, and uniformity of the core-shell structure of Au @ Ag core-shell nanoparticles, including the morphology and concentration of Au seed, the concentration of AgNO3, the capping agent, And other factors. The study found that Au @ Ag core-shell nanoparticles have wide application prospects in the surface-enhanced Raman spectroscopy (SERS).