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  XPS study of triangular GaN nano/micro-needles grown by MOCVD technique

Kumar, M., Kumar, A., Thapa, S. B., Christiansen, S., & Singh, R. (2014). XPS study of triangular GaN nano/micro-needles grown by MOCVD technique. MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS, 186, 89-93. doi:10.1016/j.mseb.2014.03.010.

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 Creators:
Kumar, Mukesh1, Author
Kumar, Ashish1, Author
Thapa, S. B.1, Author
Christiansen, S.2, 3, Author              
Singh, R.1, Author
Affiliations:
1external, ou_persistent22              
2Christiansen Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society, ou_2364716              
3Micro- & Nanostructuring, Technology Development and Service Units, Max Planck Institute for the Science of Light, Max Planck Society, ou_2364725              

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Free keywords: LIGHT-EMITTING-DIODES; NANOWIRES; OXYGEN; NANOSTRUCTURES; SURFACES; NANORODSMaterials Science; Physics; GaN; Nano/micro-needles; MOCVD; XPS;
 Abstract: Triangular GaN nano/micro scale needles (TGN) grown on nickel coated c-plane sapphire substrate with highly dense ensemble of TGN and low dense ensemble of TGN have been investigated in the present work. The observed morphology of these TGN is in the form of triangular faceted needle like structures with average length in the order of fifty micrometres and cross-sections range from 500 nm to 3 mu m near the base of TGN. X-ray diffraction spectra illustrate the wurtzite crystal structure of TGN and better crystalline nature of the highly dense ensemble of TGN. Analysis of the X-ray photoelectron spectroscopy core level spectra shows that surfaces with highly dense ensemble of TGN and low dense ensemble of TGN interact differently with the unintended impurities (such as oxygen and carbon) and these impurities exhibit low reactivity (chemical modifications) to the surface of highly dense ensemble of TGN. (c) 2014 Elsevier B.V. All rights reserved.

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Language(s): eng - English
 Dates: 2014
 Publication Status: Published in print
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Degree: -

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Title: MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Source Genre: Journal
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Publ. Info: PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS : ELSEVIER SCIENCE BV
Pages: - Volume / Issue: 186 Sequence Number: - Start / End Page: 89 - 93 Identifier: ISSN: 0921-5107