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ISSN : 1225-0562(Print)
ISSN : 2287-7258(Online)
Korean Journal of Materials Research Vol.29 No.7 pp.432-436
DOI : https://doi.org/10.3740/MRSK.2019.29.7.432

ZnO Micro/Nanocrystals Synthesized by Thermal Evaporation Method using Mn Powder as the Reducing Agent

Ho-Jin So1,Geun-Hyoung Lee1,2†
1Department of Advanced Materials Engineering, Graduate School, Dong-eui University, 176 Eomgwangno, Busanjin-gu, Busan 47340, Republic of Korea
2Electrical & Electronic Materials Engineering Major, Division of Advanced Materials Engineering, Dong-eui University, 176 Eomgwangno, Busanjin-gu, Busan 47340, Republic of Korea
Corresponding author
E-Mail : hplee@deu.ac.kr (G.-H. Lee, Dong-eui Univ.)

Abstract

Zinc oxide(ZnO) micro/nanocrystals are grown via thermal evaporation of ZnO powder mixed with Mn powder, which is used as a reducing agent. The ZnO/Mn powder mixture produces ZnO micro/nanocrystals with diverse morphologies such as rods, wires, belts, and spherical shapes. Rod-shaped ZnO micro/nanocrystals, which have an average diameter of 360 nm and an average length of about 12 μm, are fabricated at a temperature as low as 800 °C due to the reducibility of Mn. Wireand belt-like ZnO micro/nanocrystals with length of 3 μm are formed at 900 °C and 1,000 °C. When the growth temperature is 1,100 °C, spherical shaped ZnO crystals having a diameter of 150 nm are synthesized. X-ray diffraction patterns reveal that ZnO had hexagonal wurtzite crystal structure. A strong ultraviolet emission peak and a weak visible emission band are observed in the cathodoluminescence spectra of the rod- and wire-shaped ZnO crystals, while visible emission is detected for the spherical shaped ZnO crystals.

Mn 분말을 환원제로 사용하여 열증발법에 의해 생성된 ZnO 마이크로/나노결정

소호진1,이근형1,2†
1동의대학교 대학원 신소재공학과,2동의대학교 신소재공학부 전기전자소재공학전공

초록

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