Characteristics of GaN-core/Au-shell hetere-nanowires: Effects of thermal annealing on the structural and photoluminescence properties

被引：3

作者：

Kim, Hyoun Woo ^{[1
]}

Kebede, Mesfin Abayneh ^{[1
]}

Kim, Hyo Sung ^{[1
]}

机构：

[1] Inha Univ, Div Mat Sci & Engn, Inchon 402751, South Korea

来源：

VACUUM | 2009年 / 84卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

GaN; Core-shell nanowires; Au; Sputtering; Thermal annealing; Photoluminescence; ENHANCED RAMAN-SPECTROSCOPY; COLLOIDAL CRYSTALS; RED LUMINESCENCE; DOPED GAN; GOLD; NANODEVICES; PHOTONICS; SUBSTRATE; METAL; FILMS;

D O I：

10.1016/j.vacuum.2009.04.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

GaN-core/Au-shell nanowires were fabricated and the effects of thermal annealing on the structural and photoluminescence (PL) properties were investigated. The surfaces of hetero-nanowires became rough due to the thermal annealing which could be attributed to the agglomeration of Au-shell layers into the cluster-like structures. X-ray diffraction indicated that the thermal annealing enhanced the crystallinity of the Au shell. From Gaussian deconvolution studies, we observed that the Au coating added a green band to the PL spectrum, whereas the thermal annealing enhanced the ultraviolet band. We have discussed the possible emission mechanisms. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：254 / 257

页数：4

共 32 条

[1] Programming a gold nanocrystal to recognize and selectively bind a molecular substrate in solution [J].

Aherne, D ;

Rao, SN ;

Fitzmaurice, D .

JOURNAL OF PHYSICAL CHEMISTRY B, 1999, 103 (11) :1821-1825

[2]

Cullity B. D., 1978, ELEMENTS XRAY DIFFRA

[3] Metal film over nanosphere (MFON) electrodes for surface-enhanced Raman spectroscopy (SERS): Improvements in surface nanostructure stability and suppression of irreversible loss [J].

Dick, LA ;

McFarland, AD ;

Haynes, CL ;

Van Duyne, RP .

JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (04) :853-860

[4] Semiconductor nanowire laser and nanowire waveguide electro-optic modulators [J].

Greytak, AB ;

Barrelet, CJ ;

Li, Y ;

Lieber, CM .

APPLIED PHYSICS LETTERS, 2005, 87 (15) :1-3

[5] Growth of nanowire superlattice structures for nanoscale photonics and electronics [J].

Gudiksen, MS ;

Lauhon, LJ ;

Wang, J ;

Smith, DC ;

Lieber, CM .

NATURE, 2002, 415 (6872) :617-620

[6] Electrophoretic assembly of colloidal crystals with optically tunable micropatterns [J].

Hayward, RC ;

Saville, DA ;

Aksay, IA .

NATURE, 2000, 404 (6773) :56-59

[7]

Hofmann DM, 2000, PHYS STATUS SOLIDI A, V180, P261, DOI 10.1002/1521-396X(200007)180:1<261::AID-PSSA261>3.0.CO

[8]

2-2

[9] Gallium nitride nanowire nanodevices [J].

Huang, Y ;

Duan, XF ;

Cui, Y ;

Lieber, CM .

NANO LETTERS, 2002, 2 (02) :101-104

[10] Origin of defect-related photoluminescence bands in doped and nominally undoped GaN [J].

Kaufmann, U ;

Kunzer, M ;

Obloh, H ;

Maier, M ;

Manz, C ;

Ramakrishnan, A ;

Santic, B .

PHYSICAL REVIEW B, 1999, 59 (08) :5561-5567

← 1 2 3 4 →