Tuning the band gap of ZnO nanoparticles by ultrasonic irradiation |
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Authors: | R S Yadav P Mishra A C Pandey |
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Affiliation: | (1) Centre of Excellence in Nanotechnology, School of Engineering and Technology, Asian Institute of Technology, P.O. Box 4, Klong Luang, Pathumthani, Thailand;; |
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Abstract: | In this present paper, we report the tunability of ZnO nanoparticles by ultrasonic irradiation. Different sized ZnO nanoparticles
viz. 2.58–2.97 nm have been synthesized with variation of ultrasonic irradiation time 75–270 min in presence of Histidine
as capping agent. UV and visible spectroscopy study revealed that as ultrasonic irradiation time increases, there is increase
in amount of formed ZnO nanoparticles and also there is red shift in absorption edge. This confirms the tunability of bandgap
of histidine capped ZnO nanoparticles with ultrasonic irradiation. Growth mechanism for controlling the size of ZnO nanoparticles
are also discussed. |
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