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Title: Plasmonic photocatalytic reactions enhanced by hot electrons in a one-dimensional quantum well

The plasmonic endothermic oxidation of ammonium ions in a spinning disk reactor resulted in light energy transformation through quantum hot charge carriers (QHC), or quantum hot electrons, during a chemical reaction. It is demonstrated with a simple model that light of various intensities enhance the chemical oxidization of ammonium ions in water. It was further observed that light illumination, which induces the formation of plasmons on a platinum (Pt) thin film, provided higher processing efficiency compared with the reaction on a bare glass disk. These induced plasmons generate quantum hot electrons with increasing momentum and energy in the one-dimensional quantum well of a Pt thin film. The energy carried by the quantum hot electrons provided the energy needed to catalyze the chemical reaction. The results indicate that one-dimensional confinement in spherical coordinates (i.e., nanoparticles) is not necessary to provide an extra excited state for QHC generation; an 8 nm Pt thin film for one-dimensional confinement in Cartesian coordinates can also provide the extra excited state for the generation of QHC.
Authors:
; ;  [1] ;  [2]
  1. Instrument Technology Research Center, National Applied Research Laboratories, Hsinchu, 300, Taiwan (China)
  2. National Center for High-performance Computing, Hsinchu 300, Taiwan and Department of Physics, National Chung Hsing University, Taichung 402, Taiwan (China)
Publication Date:
OSTI Identifier:
22492202
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 11; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CARTESIAN COORDINATES; CHARGE CARRIERS; COMPARATIVE EVALUATIONS; ELECTRONS; EXCITED STATES; GLASS; ILLUMINANCE; NANOPARTICLES; OXIDATION; PHOTOCATALYSIS; PLASMONS; PLATINUM; QUANTUM WELLS; THIN FILMS; TRANSFORMATIONS; VISIBLE RADIATION; WATER