대기 분위기의 알루미나 도가니 내에서 Zn 분말의 산화에 의해 합성된 ZnO 나노분말

• Published in: 대한금속·재료학회지, 48(9) Vol. 48; no. 9; pp. 861 - 866
• Main Authors: 이근형, Gun Hyoung Lee
• Format: Journal Article
• Language: Korean
• Published: 대한금속재료학회 20.09.2010; 대한금속·재료학회
• Subjects: nanostructured materials; optical properties; scanning electron microscopy; SEM; vapor deposition; ZnO tetrapod; 재료공학
• ISSN: 1738-8228; 2288-8241

Tetrapod-shaped ZnO crystals were synthesized through a simple oxidation of metallic Zn powder in air without the presence of any catalysts or substrates. X-ray diffraction data revealed that the ZnO crystals had wurtzite structure. It is supposed that the growth of the tetrapod proceeded in a vapor-solid growth mechanism. As the amount of the source powder increased, the size of the tetrapod decreased. The tip morphology of the tetrapod changed from a needle-like shape to a spherical shape with the oxidation time. ZnO crystals with rod shape were fabricated via the oxidation of Zn and Sn mixture. Sn played an important role in the formation of ZnO crystals with different morphology by affecting the growth mode of ZnO crystals. The cathodoluminescent properties were measured for the samples. The strongest green emission was observed for the rod-shaped ZnO crystals, suggesting that the crystals had the high density of oxygen vacancies.