Preparation and characterization of Ag@Au bimetallic nanoparticles
Received date: 2020-03-26
Online published: 2022-01-18
赵天琛 , 张晓磊 , 楼柿涛 . Ag@Au双金属纳米颗粒的制备和表征[J]. 华东师范大学学报(自然科学版), 2022 , 2022(1) : 43 -51 . DOI: 10.3969/j.issn.1000-5641.2022.01.006
Ag nanoparticles were first prepared using a seed-based thermal synthetic procedure. The monometallic particles were then transformed into bimetallic particles via a galvanic replacement reaction. A transmission electron microscope (TEM), scanning transmission electron microscope (STEM), and absorption spectrum were subsequently used for characterization. By controlling the amount of seed added, the ultrasonic exposure, and the centrifugal time, we can effectively tune the size of the particles and the localized surface plasmon resonance peak positions. The TDBC film can be wrapped on the surface of the metallic nanostructures by a ligand exchange reaction to achieve strong coupling between surface plasmon and molecular excitons.
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