Fabrication and characterization of tetrapod-like ZnO nanostructures prepared by catalyst-free thermal evaporation

Journal Article · Fri Jan 15 04:00:00 EST 2010 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2009.10.011· OSTI ID:22066176

Libing, Feng ^[1]; Mei, Liu; Yuying, Ma; Jing, Wei; Baoyuan, Man ^[1]

---

1. College of Physics and Electronics, Shandong Normal University, Jinan 250014 (China)

Tetrapod-like ZnO nanostructures were fabricated on ZnO-coated sapphire (001) substrates by two steps: pulsed laser deposition (PLD) and catalyst-free thermal evaporation process. First, the ZnO films were pre-deposited on sapphire (001) substrates by PLD. Then the ZnO nanostructures grew on ZnO-coated sapphire (001) substrate by the simple thermal evaporation of the metallic zinc powder at 900 deg. C in the air without any catalysts. The pre-deposited ZnO films by PLD on the substrates can provide growing sites for the ZnO nanostructures. The as-synthesized ZnO nanostructures were characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and Fourier transform infrared spectrum (FTIR). The results show that the tetrapod-like ZnO nanostructures are highly crystalline with the wurtzite hexagonal structure. Photoluminescence (PL) spectrum of as-synthesized nanostructures exhibits a UV emission peak at {approx} 389 nm and a broad green emission peak at {approx} 513 nm. In addition, the growth mechanism of ZnO nanostructures is also briefly discussed.

• OSTI ID: 22066176
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Journal Issue: 1 Vol. 61; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
CATALYSTS
CRYSTAL GROWTH
ENERGY BEAM DEPOSITION
EVAPORATION
FABRICATION
FOURIER TRANSFORMATION
INFRARED SPECTRA
LASER RADIATION
NANOSTRUCTURES
PHOTOLUMINESCENCE
PULSED IRRADIATION
SAPPHIRE
SCANNING ELECTRON MICROSCOPY
SUBSTRATES
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
ZINC
ZINC OXIDES