Role of the surface polarity in governing the luminescence properties of ZnO nanoparticles synthesized by Sol-gel route
DSpace at IIT Bombay
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Title |
Role of the surface polarity in governing the luminescence properties of ZnO nanoparticles synthesized by Sol-gel route
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Creator |
SHARMA, A
DHAR, S SINGH, BP |
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Subject |
ZnO
Photoluminescence Hydroxyl groups Surface charge OPTICAL-PROPERTIES NANOROD GROWTH DEVICE SENSOR CELLS |
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Description |
ZnO nanoparticle samples, which are synthesized by a sol-gel route and collected after various stages of a washing procedure, are systematically investigated using a variety of experimental techniques. The study shows that while the surface charge polarity is positive for the as-grown (unwashed) particles, the surface turns negatively charged when the particles are sufficiently washed. This dissimilar surface charge polarity has been found to result in markedly different luminescence characteristics for the two cases (washed and unwashed). Our study of the luminescence properties under different surrounding conditions furthermore reveals that the major source for the GL emission for these nanoparticles is the hydroxyl groups, which are physisorbed on the surface. (C) 2013 Elsevier B. V. All rights reserved.
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Publisher |
ELSEVIER SCIENCE BV
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Date |
2014-10-15T08:33:52Z
2014-10-15T08:33:52Z 2013 |
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Type |
Article
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Identifier |
APPLIED SURFACE SCIENCE, 273144-149
http://dx.doi.org/10.1016/j.apsusc.2013.01.215 http://dspace.library.iitb.ac.in/jspui/handle/100/14694 |
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Language |
en
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