Catalyst-Free Direct Vapor-Phase Growth of Hexagonal ZnO Nanowires on α-Al2O3

被引：1

作者：

Hullavarad, S. S. ^{[1
]}

Hullavarad, N. V. ^{[1
]}

Vispute, R. D. ^{[2
]}

Venkatesan, T. ^{[2
]}

Kilpatrick, S. J. ^{[3
]}

Ervin, M. H. ^{[3
]}

Nichols, B. ^{[3
]}

Wickenden, A. E. ^{[3
]}

机构：

[1] Univ Alaska, Off Elect Miniaturizat, Fairbanks, AK 99701 USA

[2] Univ Maryland, Ctr Nanophys & Appl Mat, College Pk, MD 20742 USA

[3] USA, Res Lab, Adelphi, MD 20783 USA

来源：

JOURNAL OF ELECTRONIC MATERIALS | 2010年 / 39卷 / 08期

关键词：

Nanowires; ZnO; catalyst free; PL; CL; ZINC-OXIDE; THIN-FILMS; OPTICAL-PROPERTIES; EPITAXIAL-GROWTH; DEPOSITION; NANOSTRUCTURES; LUMINESCENCE; NANOTUBES; MECHANISM; EMISSION;

D O I：

10.1007/s11664-010-1251-z

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The evolution of ZnO nanowires has been studied under supersaturation of Zn metal species with and without a ZnO thin-film buffer layer on alpha-Al2O3 deposited by the pulsed laser ablation technique. The nanowires had diameters in the range of 30 nm to 50 nm and lengths in the range of 5 mu m to 10 mu m with clear hexagonal shape and [000 (1) over bar], [10 (1) over bar1], and [10 (1) over bar0] facets. X-ray diffraction (XRD) measurements indicated crystalline properties for the ZnO nanostructures grown on pulsed laser deposition (PLD) ZnO nucleation layers. The optical properties were analyzed by photoluminescence (PL) and cathodoluminescence (CL) measurements. The ZnO nanowires were found to emit strong ultraviolet (UV) light at 386 nm and weak green emission as observed by PL measurements. The stoichiometry of Zn and O was found to be close to 1 by x-ray photoelectron spectroscopy (XPS) measurements. The process-dependent growth properties of ZnO nanostructures can be harnessed for future development of nanoelectronic components including optically pumped lasers, optical modulators, detectors, electron emitters, and gas sensors.

引用

页码：1209 / 1217

页数：9

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