skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: An optimal thermal evaporation synthesis of c-axis oriented ZnO nanowires with excellent UV sensing and emission characteristics

Abstract

Highlights: • c-Axis alignment of ZnO nanowires was optimized using self-seeding thermal evaporation method. • Influence of purified air on the morphology and optoelectronic properties were studied. • Nanowires grown under optimal conditions exhibit strong UV emission peak in PL spectrum. • Optimized growth condition establish nanowires of excellent UV sensing characteristics - Abstract: Well-aligned (c-axis oriented) ZnO nanowire arrays were successfully synthesized on Si (1 0 0) substrates through an optimized self-seeding thermal evaporation method. An open-ended chemical vapor deposition (CVD) setup was used in the experiment, with argon and purified air as reaction gases. Epitaxial growth of c-axis oriented ZnO nanowires was observed for 5 sccm flow rate of purified air, whereas Zn/Zn suboxide layers and multiple polycrystalline layers of ZnO were obtained for absence and excess of purified air, respectively. Ultraviolet (UV) sensing and emission properties of the as-grown ZnO nanostructures were investigated through the current–voltage (I–V) characteristics of the nanowires under UV (λ = 365 nm) illumination of 8 mW/cm{sup 2} and using photoluminescence spectra. Nanowires grown under optimum flow of air emitted four times higher intensity of 380 nm UV light as well as exhibited 34 times higher UV radiation sensitivity compared to that ofmore » other nanostructures synthesized in this study.« less

Authors:
 [1];  [1];  [2];  [2];  [1]
  1. Electrical and Computer Systems Engineering, School of Engineering, Monash University Malaysia, 47500 (Malaysia)
  2. Mechanical Engineering, School of Engineering, Monash University Malaysia, 47500 (Malaysia)
Publication Date:
OSTI Identifier:
22581535
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 77; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AIR; ARGON; CHEMICAL VAPOR DEPOSITION; COMPARATIVE EVALUATIONS; CRYSTAL STRUCTURE; ELECTRIC CONDUCTIVITY; EPITAXY; EVAPORATION; MORPHOLOGY; NANOWIRES; OPTICAL PROPERTIES; PHOTOLUMINESCENCE; POLYCRYSTALS; SILICON; SUBSTRATES; ULTRAVIOLET RADIATION; VAPORS; X-RAY DIFFRACTION; ZINC OXIDES

Citation Formats

Saha, Tridib, E-mail: tridib.saha@monash.edu, Achath Mohanan, Ajay, E-mail: ajay.mohanan@monash.edu, Swamy, Varghese, E-mail: varghese.swamy@monash.edu, Guo, Ningqun, E-mail: anthony.guo@monash.edu, and Ramakrishnan, N., E-mail: ramakrishnan@monash.edu. An optimal thermal evaporation synthesis of c-axis oriented ZnO nanowires with excellent UV sensing and emission characteristics. United States: N. p., 2016. Web. doi:10.1016/J.MATERRESBULL.2016.01.034.
Saha, Tridib, E-mail: tridib.saha@monash.edu, Achath Mohanan, Ajay, E-mail: ajay.mohanan@monash.edu, Swamy, Varghese, E-mail: varghese.swamy@monash.edu, Guo, Ningqun, E-mail: anthony.guo@monash.edu, & Ramakrishnan, N., E-mail: ramakrishnan@monash.edu. An optimal thermal evaporation synthesis of c-axis oriented ZnO nanowires with excellent UV sensing and emission characteristics. United States. doi:10.1016/J.MATERRESBULL.2016.01.034.
Saha, Tridib, E-mail: tridib.saha@monash.edu, Achath Mohanan, Ajay, E-mail: ajay.mohanan@monash.edu, Swamy, Varghese, E-mail: varghese.swamy@monash.edu, Guo, Ningqun, E-mail: anthony.guo@monash.edu, and Ramakrishnan, N., E-mail: ramakrishnan@monash.edu. Sun . "An optimal thermal evaporation synthesis of c-axis oriented ZnO nanowires with excellent UV sensing and emission characteristics". United States. doi:10.1016/J.MATERRESBULL.2016.01.034.
@article{osti_22581535,
title = {An optimal thermal evaporation synthesis of c-axis oriented ZnO nanowires with excellent UV sensing and emission characteristics},
author = {Saha, Tridib, E-mail: tridib.saha@monash.edu and Achath Mohanan, Ajay, E-mail: ajay.mohanan@monash.edu and Swamy, Varghese, E-mail: varghese.swamy@monash.edu and Guo, Ningqun, E-mail: anthony.guo@monash.edu and Ramakrishnan, N., E-mail: ramakrishnan@monash.edu},
abstractNote = {Highlights: • c-Axis alignment of ZnO nanowires was optimized using self-seeding thermal evaporation method. • Influence of purified air on the morphology and optoelectronic properties were studied. • Nanowires grown under optimal conditions exhibit strong UV emission peak in PL spectrum. • Optimized growth condition establish nanowires of excellent UV sensing characteristics - Abstract: Well-aligned (c-axis oriented) ZnO nanowire arrays were successfully synthesized on Si (1 0 0) substrates through an optimized self-seeding thermal evaporation method. An open-ended chemical vapor deposition (CVD) setup was used in the experiment, with argon and purified air as reaction gases. Epitaxial growth of c-axis oriented ZnO nanowires was observed for 5 sccm flow rate of purified air, whereas Zn/Zn suboxide layers and multiple polycrystalline layers of ZnO were obtained for absence and excess of purified air, respectively. Ultraviolet (UV) sensing and emission properties of the as-grown ZnO nanostructures were investigated through the current–voltage (I–V) characteristics of the nanowires under UV (λ = 365 nm) illumination of 8 mW/cm{sup 2} and using photoluminescence spectra. Nanowires grown under optimum flow of air emitted four times higher intensity of 380 nm UV light as well as exhibited 34 times higher UV radiation sensitivity compared to that of other nanostructures synthesized in this study.},
doi = {10.1016/J.MATERRESBULL.2016.01.034},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 77,
place = {United States},
year = {2016},
month = {5}
}