Pandey, P;
Sui, M;
Li, M-Y;
Zhang, Q;
Kunwar, S;
Wu, J;
Wang, ZM;
... Lee, J; + view all
(2016)
Nanoparticles to Nanoholes: Fabrication of Porous GaN with Precisely Controlled Dimension via the Enhanced GaN Decomposition by Au Nanoparticles.
Crystal Growth and Design
, 16
(6)
pp. 3334-3344.
10.1021/acs.cgd.6b00302.
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Abstract
Porous GaN exhibits unique optoelectronic, chemical, and physical properties such as shift of band gap, increased surface area ratio, excellent chemical, mechanical, and thermal stability as well as efficient luminescence as compared to its bulk counterpart. Herein, we demonstrate a precise, efficient, and still cost-effective method of the fabrication of porous GaN through the enhanced GaN decomposition by using Au nanoparticles (NPs) as a catalyst, in which the size, density, and shape of the pores (nanoholes, NHs) can be precisely controlled. By the thermal annealing assisted with the Au NPs, the NHs are successfully fabricated, and the existence of Au NPs significantly accelerate the GaN decomposition at the interface between the NPs and GaN due to the Ga absorption by the Au NPs. We systematically study the formation mechanism of NHs assisted by the Au NPs by means of annealing temperature, duration, and Au deposition amount, and the results are systematically analyzed and discussed.
| Type: | Article |
|---|---|
| Title: | Nanoparticles to Nanoholes: Fabrication of Porous GaN with Precisely Controlled Dimension via the Enhanced GaN Decomposition by Au Nanoparticles |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acs.cgd.6b00302 |
| Publisher version: | http://dx.doi.org/10.1021/acs.cgd.6b00302 |
| Language: | English |
| Additional information: | © 2016 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Crystal Growth and Design, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/ipdf/10.1021/acs.cgd.6b00302 |
| Keywords: | Science & Technology, Physical Sciences, Technology, Chemistry, Multidisciplinary, Crystallography, Materials Science, Multidisciplinary, Chemistry, Materials Science, THERMAL-DECOMPOSITION, GOLD NANOPARTICLES, OPTICAL-PROPERTIES, EVOLUTION, GROWTH, LAYERS, SHAPE, LUMINESCENCE, DEPOSITION, MORPHOLOGY |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1522549 |
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