The optical response of ZnO nanorods induced by oxygen chemisorption and desorption

Sanjaya Brahma, Chi Wei Yang, Chiu Hsin Wu, Feng Ming Chang, Tsung Jhe Wu, Chien Sheng Huang, Kuang Yao Lo

研究成果: Article

9 引文 (Scopus)

摘要

We demonstrate a strategic approach to realize the oxygen chemisorption and desorption over ZnO nanorods (ZNRs) by second harmonic generation (SHG), X-ray photoelectron spectroscopy (XPS) and a strong correlation is established in order to illustrate the quality of the top surface properties. A detailed investigation is carriedout with the variation of annealing temperature and oxygen flow rate for the optimization of the oxygen adsorption/desorption behavior. Oxygen species ionosorbed on ZNRs create a built-in electric field beneath the surface of ZNRs at room temperature and this directly reflects on the changes in the electric field induced SHG. The trend of decrease/increase in the intensity of SHG due to Ultraviolet irradiation and under rich oxygen atmosphere depends strongly on the quality of ZnO surface after post-annealing treatment. SHG is used extensively to indicate the dynamic chemisorption and desorption of oxygen on ZNRs in ambient atmosphere, which can assist the related research of oxygen adsorption in XPS under high vacuum.

原文English
頁(從 - 到)900-907
頁數8
期刊Sensors and Actuators, B: Chemical
259
DOIs
出版狀態Published - 2018 四月 15

指紋

Chemisorption
Nanorods
chemisorption
nanorods
Desorption
desorption
Oxygen
Harmonic generation
oxygen
harmonic generations
X ray photoelectron spectroscopy
Electric fields
photoelectron spectroscopy
Annealing
Adsorption
atmospheres
annealing
adsorption
electric fields
high vacuum

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

引用此文

Brahma, Sanjaya ; Yang, Chi Wei ; Wu, Chiu Hsin ; Chang, Feng Ming ; Wu, Tsung Jhe ; Huang, Chien Sheng ; Lo, Kuang Yao. / The optical response of ZnO nanorods induced by oxygen chemisorption and desorption. 於: Sensors and Actuators, B: Chemical. 2018 ; 卷 259. 頁 900-907.
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The optical response of ZnO nanorods induced by oxygen chemisorption and desorption. / Brahma, Sanjaya; Yang, Chi Wei; Wu, Chiu Hsin; Chang, Feng Ming; Wu, Tsung Jhe; Huang, Chien Sheng; Lo, Kuang Yao.

於: Sensors and Actuators, B: Chemical, 卷 259, 15.04.2018, p. 900-907.

研究成果: Article

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AU - Brahma, Sanjaya

AU - Yang, Chi Wei

AU - Wu, Chiu Hsin

AU - Chang, Feng Ming

AU - Wu, Tsung Jhe

AU - Huang, Chien Sheng

AU - Lo, Kuang Yao

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AB - We demonstrate a strategic approach to realize the oxygen chemisorption and desorption over ZnO nanorods (ZNRs) by second harmonic generation (SHG), X-ray photoelectron spectroscopy (XPS) and a strong correlation is established in order to illustrate the quality of the top surface properties. A detailed investigation is carriedout with the variation of annealing temperature and oxygen flow rate for the optimization of the oxygen adsorption/desorption behavior. Oxygen species ionosorbed on ZNRs create a built-in electric field beneath the surface of ZNRs at room temperature and this directly reflects on the changes in the electric field induced SHG. The trend of decrease/increase in the intensity of SHG due to Ultraviolet irradiation and under rich oxygen atmosphere depends strongly on the quality of ZnO surface after post-annealing treatment. SHG is used extensively to indicate the dynamic chemisorption and desorption of oxygen on ZNRs in ambient atmosphere, which can assist the related research of oxygen adsorption in XPS under high vacuum.

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