Synthesis and Optical Characterization of ZnO Quantum Dots and Nanorods

Reddy, J.P. and Kashyap, Sandeep and Paul, A.K. (2012) Synthesis and Optical Characterization of ZnO Quantum Dots and Nanorods. Advanced Science, Engineering and Medicine, 4 (3). pp. 222-224. ISSN 2164-6627(Print), 2164-6635(Online)

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ZnO quantum dots were synthesized via precipitation using millimolar solutions of zinc acetate and sodium hydroxide in methanol. The synthesized quantum dots were characterized via absorption and fluorescence measurements. The onset of absorption observed at a lower wavelength of ∼350 nm as compared to bulk (380 nm) indicates an increase in the band gap through quantum confinement and confirms the presence of quantum dots. In order to calculate the size and distribution of ZnO quantum dots, fluorescence measurements were made. The synthesized quantum dots were drop casted on gold coated silicon substrates and were used as seeds to grow nanorods by using aqueous solutions of zinc nitrate (hexahydrate) and hexamine. The FESEM micrographs revealed good quality hexagonal shaped nanorods with a relatively uniform diameter of ∼75 nm.

Item Type: Article
Uncontrolled Keywords: Zinc Oxide; Quantum Dots; Nanorods; Fluorescence
Subjects: CSIO > Nano Science and Nano Technology
Divisions: Photonics Instrumentation
Depositing User: Ms. J Shrivastav
Date Deposited: 25 Feb 2013 06:30
Last Modified: 25 Feb 2013 06:30

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