PHOTOLUMINESCENCE OF ZnO NANOSTRUCTURE PREPARED BY CATALYST - ASSISTED VAPOR - LIQUID - SOLID TECHNIQUE

Authors

Hoa Tran Thi Quynh
Canh Ta Dinh
Long Nguyen Ngoc
Tuyen Nguyen Viet
Phuong Nguyen Duy

Abstract

ZnO semiconductor nanostructures have been synthesized by thermal evaporation of mixture of ZnO and graphite powders. The thin layer of gold coated on Si substrates was used as a catalyst. The structure analysis shows high crystallinity of ZnO, their preferred orientation along the (0 02) plane of the wurtzite phase and their chemical purity. The scanning electron microscopy (SEM) images of products indicate that ZnO nanowires have a diameter of about 40 - 150 nm and a length of up to tens of micrometers. The morphology and structure of ZnO nanowires and nanorods depend on the thicknesses of the Au layers. The fact that Au nanoparticles are located at the tips of the nanowires represents a strong evidence for a growth process dominated by the vapor - liquid - solid mechanism. The low temperature photoluminescence spectra of the ZnO nanowires indicate a group of the ultraviolet narrow peaks and a blue - green very broad peak at 500 nm.

Publication Date

11-15-2017

Recommended Citation

Thi Quynh, Hoa Tran; Dinh, Canh Ta; Ngoc, Long Nguyen; Viet, Tuyen Nguyen; and Duy, Phuong Nguyen (2017) "PHOTOLUMINESCENCE OF ZnO NANOSTRUCTURE PREPARED BY CATALYST - ASSISTED VAPOR - LIQUID - SOLID TECHNIQUE," ASEAN Journal on Science and Technology for Development: Vol. 24: No. 1, Article 5.
DOI: https://doi.org/10.29037/ajstd.192
Available at: https://ajstd.ubd.edu.bn/journal/vol24/iss1/5