|
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 |
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