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.

Abstracts
 1. 서 론
 2. 실험 방법
 3. 실험결과 및 고찰
 4. 결 론
 References

• 소호진(동의대학교 대학원 신소재공학과) | Ho-Jin So (Department of Advanced Materials Engineering, Graduate School, Dong-eui University)
• 이근형(동의대학교 대학원 신소재공학과/동의대학교 신소재공학부 전기전자소재공학전공) | Geun-Hyoung Lee (Department of Advanced Materials Engineering, Graduate School, Dong-eui University/Electrical & Electronic Materials Engineering Major, Division of Advanced Materials Engineering, Dong-eui University) Corresponding author