English  |  正體中文  |  简体中文  |  Items with full text/Total items : 28611/40649
Visitors : 510580      Online Users : 53
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/43205

Title: Boosted photocatalytic efficiency through plasmonic field confinement with bowtie and diabolo nanostructures under LED irradiation
Authors: Lee CH;Liao SC;Lin TR;Wang SH;Lai DY;Chiu PK;Lee JW;Wu WF
Contributors: 國立臺灣海洋大學:機械與機電工程學系
Date: 2016
Issue Date: 2017-06-09T02:20:47Z
Publisher: Opt Express
Abstract: Abstract:Photoresist and electron beam lithography techniques were used to fabricate embedded Ag bowtie and diabolo nanostructures with various apex angles on the surface of a TiO<sub>2</sub> film. The reinforced localized surface plasmon resonance (LSPR) and electric field generated at both the Ag/TiO<sub>2</sub> and air/TiO<sub>2</sub> interfaces enabled high light absorbance in the TiO<sub>2</sub> nanostructure. Results for both the bowtie and diabolo nanostructures showed that a reduction in the apex angle enhances both LSPR and Raman intensity. The maximum electric current density observed at the apex indicates that the strongest SPR confines at the tip gap of the bowtie and corners of the diabolo. In a long-wavelength region, as the apex angle increases, the resonant peak wavelength of the standing wave matches the increased length of the prism edges of the bowtie and diabolo to create a redshift. In a short-wavelength region, as the apex angle increases, the blueshift of the resonant peak wavelength is presumably attributable to the increase in the effective index of the local surface plasmon polariton standing wave mainly residing along both the bowtie and diabolo axes. The redshift and blueshift trend in the simulation results for the resonant peak wavelength agrees well with the experimental results. The fastest photocatalytic rate was obtained by placing the Ag/TiO<sub>2</sub> bowtie at an apex angle of 30° in the methylene blue solution, revealing that the plasmonic photocatalysis causes the highest degradation efficiency. This is because the Schottky junction and LSPR can stimulate many valid radicals for the environmental improvement.
Relation: 24(16) pp.17541-17552
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/43205
Appears in Collections:[機械與機電工程學系] 期刊論文

Files in This Item:

There are no files associated with this item.

All items in NTOUR are protected by copyright, with all rights reserved.


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback