Document Detail


Application of in situ measurement of photo-induced variations in electron work function for in-depth understanding of the photocatalytic activity of TiO(2) nanotubes.
MedLine Citation:
PMID:  22705558     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
The electron work function (EWF) is the minimum energy required to move an electron at the Fermi level from inside a conducting material to its surface with zero kinetic energy. This fundamental parameter is directly related to many chemical, physical, and mechanical properties of materials. In this work, variations in EWF of TiO(2) nanotube arrays under light illumination were monitored in situ using a Kelvin probe in order to study the photon-induced electron excitation in the TiO(2) nanotubular arrays upon illumination. It was shown that the EWF could be used to investigate the electron-hole separation and recombination, helping us to better understand the photo-activity of the photocatalytic material. This study has demonstrated that EWF provides an effective parameter for understanding of semiconductors' photo-activities with different views that may not be achieved using traditional techniques, such as diffuse reflection spectroscopy and photoelectrochemical measurement.
Authors:
Ning Fu; Xinhu Tang; Dongyang Li
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Publication Detail:
Type:  Journal Article     Date:  2012-06-18
Journal Detail:
Title:  Nanotechnology     Volume:  23     ISSN:  1361-6528     ISO Abbreviation:  Nanotechnology     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-06-19     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101241272     Medline TA:  Nanotechnology     Country:  England    
Other Details:
Languages:  eng     Pagination:  275704     Citation Subset:  IM    
Affiliation:
Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2V4, Canada.
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