122nd General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation of Young Analytical Chemists II
Room No. Room 321
Time FRI 10:25-:
Code ANAL2.O-14
Subject Support Effect of Plasmonic Nanoparticles on Carbon Nanotubes at Single-molecule Level
Authors Yingying Cao, Seong Ho Kang1,*
Chemistry, Kyung Hee University, Korea
1Department of Applied Chemistry, Kyung Hee University, Korea
Abstract Supported catalysts were synthesized with gold nanoparticles deposited on the outer surface (Au/CNTs-out) and inner surface (Au/CNTs-in) of CNTs by wet chemistry method. Single-molecule nanocatalysis measurements were carried out using a lab-built prism-type total internal reflection fluorescence microscope (TIRFM) by detecting the fluorescence from the reduction reaction catalyzed over Au/CNTs-out and Au/CNTs-in. The results indicated the support effect of CNTs in both product formation process and product dissociation process. For the product formation process, Au/CNTs-out showed higher catalytic activity than Au/CNTs-in because gold nanoparticles on the exterior of CNTs have relatively enriched electrons compared to those on the interior walls. For the product dissociation process, Au/CNTs-out exhibited the faster product molecules dissociation rate than Au/CNTs-in. Moreover, same dissociation pathway was observed. Product molecules on both Au/CNTs-out and Au/CNTs-in preferred the reactant-assisted dissociation pathway. Our research advances the traditional single-molecule method to provide insights into the supported catalysts.
E-mail caoying0514@gmail.com