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引言贵金属纳米簇(MNCs)是由几个到几十个贵金属原子构成的相对稳定的纳米结构,其尺寸一般为几个纳米。当金属颗粒尺寸与电子的费米波长相当时,量子尺寸效应使能级变得不连续,电子在基态和激发态之间发生跃迁,形成贵金属纳米团簇的可见荧光。与传统的有机荧光染料和量子点相比,MNCs尺寸小,荧光性能稳定可调,无毒性,生物相容性好,在荧光检测、细胞成像、生物标记等领域均体现出巨大的应用价值。目前,MNCs荧光材料的研究刚刚起步,其光学性质的优
Introduction Precious metal nanoclusters (MNCs) are relatively stable nanostructures composed of several to several dozen noble metal atoms, typically several nanometers in size. When the size of the metal particles is comparable to the Fermi wavelength of electrons, the quantum size effect makes the order of discontinuity, and the electrons undergo a transition between the ground state and the excited state to form the visible fluorescence of the noble metal nanoclusters. Compared with traditional organic fluorescent dyes and quantum dots, MNCs have small size, stable and adjustable fluorescence, non-toxicity, good biocompatibility and great application value in the fields of fluorescence detection, cell imaging and biomarker. At present, the study of MNCs fluorescent material has just started, its excellent optical properties