Journal of East China Normal University(Natural Science) ›› 2022, Vol. 2022 ›› Issue (1): 43-51.doi: 10.3969/j.issn.1000-5641.2022.01.006

• Phisics and Electronic Science • Previous Articles     Next Articles

Preparation and characterization of Ag@Au bimetallic nanoparticles

Tianchen ZHAO, Xiaolei ZHANG*(), Shitao LOU   

  1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200241, China
  • Received:2020-03-26 Online:2022-01-25 Published:2022-01-18
  • Contact: Xiaolei ZHANG


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.

Key words: localized surface plasmon, metallic nanoparticles, strong coupling

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