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Effect of Al-doping on the structure and optical properties of electrospun zinc oxide nanofiber films.
MedLine Citation:
PMID:  21621791     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Electrospun ZnO precursor nanofibers of average diameters 122±64nm, 117±44nm and 110±39nm were fabricated by controlling the Al concentration of a polymeric solution. The resulting nanofibers were characterized by the XRD, SEM, EDS, TEM, XPS and PL. The electrospun Al-doped ZnO nanofiber films were polycrystalline and composed of densely packed grains, with crystallite size ranging from 28.7nm, 25.7nm, 25.4nm to 20.4nm corresponding to the atomic concentration of aluminum from 0, 1.6, 2.5 to 5.8at.%. The incorporation of aluminum resulted in a decrease trend in the grain size and lattice parameter of the ZnO nanofiber films. The room temperature PL spectra of all samples show three different emissions, including UV (ultraviolet) emission with an obvious blue shift, Vis (visible) emission and NIR (near infrared) emission, the intensity of which decreases monotonically as the doping concentration is increased except for the highest doping level. The impurity content correlates with changes in the PL spectra, and the appropriate Al doping can improve the optical properties of ZnO nanofibers. The small size effect and Al-doping or the impurity incorporation should be responsible for the blue shift observation in Al-doped ZnO nanofiber films.
Authors:
Sining Yun; Sangwoo Lim
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-5-15
Journal Detail:
Title:  Journal of colloid and interface science     Volume:  -     ISSN:  1095-7103     ISO Abbreviation:  -     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-5-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0043125     Medline TA:  J Colloid Interface Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Elsevier Inc. All rights reserved.
Affiliation:
School of Material Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
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