121st General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code MAT.P-546
Subject Synthesis of core-shell nanoparticle clusters with synergistic effect between plasmonic and catalytic functions
Authors Seunghoon Lee, Sang Woo Han*
Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
Abstract Designing controlled hybrid nanoarchitectures between plasmonic and catalytic materials is of paramount importance to fully exploit each function of constituent materials. Here we report a new synthetic strategy for the realization of colloidal clusters of core-shell nanoparticles with plasmonic cores and catalytically active shells. The Au@M (M = Pd or Pt) nanoparticle clusters (NPCs) with a high density of sub-1 nm interparticle gaps were successfully prepared by the deposition of M shells onto thermally activated Au NPCs. NPCs with other metal, metal sulfide, and metal oxide shells could also be synthesized by using the present approach. The prepared Au@M NPCs showed remarkably enhanced plasmonic performance compared to their Au@M nanoparticle counterparts due to the localization of a strong electromagnetic field at the interparticle gaps, while the inherent catalytic function of shells was intact. In situ real-time Raman spectroscopy and plasmon-enhanced electrocatalysis experiments demonstrated that the controlled assembly of core-shell nanoparticles is a very effective route for the synergistic integration of plasmonic and catalytic functions in a single platform.
E-mail soenghoon@kaist.ac.kr