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-532
Subject Clustering of Au@Pd Core-Shell Nanoparticles Enhances Hydrogen Sensing Ability in Aqueous Solution
Authors Younghyun Wy, Seunghoon Lee, Dae Han Wi, Sang Woo Han*
Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
Abstract Developing sensitive and stable hydrogen sensors is of great importance for sustainable energy development. Here, we describe a novel hydrogen sensing platform based on colloidal clusters of Au@Pd core-shell nanoparticles (Au@Pd NPCs) with characteristic localized surface plasmon resonance (LSPR) properties. Au@Pd NPCs with well-controlled topologies exhibited highly pronounced sensitivity for LSPR-based hydrogen sensing in aqueous solution in comparison to their nanoparticle counterparts and previously reported Au-Pd bimetallic nanostructures, which can be attributed to highly promoted plasmonic field resulting from the cluster formation. Furthermore, Au@Pd NPCs showed stable sensing capability for repeated hydrogen sensing cycles. The present strategy for devising high-performance LSPR-based hydrogen sensors via the controlled assembly of bimetallic nanoparticles can be applied to the development of efficient plasmonic platforms for various sensing applications.
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