Ultra violet sensors based on nanostructured ZnO spheres in network of nanowires: a novel approach

Hullavarad, SS; Hullavarad, NV; Karulkar, PC; Luykx, A; Valdivia, P

doi:10.1007/s11671-007-9048-6

Nano Express
Open Access
Published: 03 March 2007

Ultra violet sensors based on nanostructured ZnO spheres in network of nanowires: a novel approach

SS Hullavarad¹,
NV Hullavarad¹,
PC Karulkar¹,
A Luykx² &
…
P Valdivia²

Nanoscale Research Letters volume 2, Article number: 161 (2007) Cite this article

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Abstract

The ZnO nanostructures consisting of micro spheres in a network of nano wires were synthesized by direct vapor phase method. X-ray Photoelectron Spectroscopy measurements were carried out to understand the chemical nature of the sample. ZnO nanostructures exhibited band edge luminescence at 383 nm. The nanostructure based ZnO thin films were used to fabricate UV sensors. The photoresponse measurements were carried out and the responsivity was measured to be 50 mA W⁻¹. The rise and decay time measurements were also measured.

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Acknowledgements

SSH is thankful to Dr. Diane Pugel and Dr. R.D. Vispute for fruitful discussions. Authors would like to acknowledge the support from Defense Micro Electronic Agency (DMEA) at University of Alaska, Fairbanks.

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Authors and Affiliations

Office of Electronic Miniaturization, University of Alaska Fairbanks, Fairbanks, AK, 99701, USA
SS Hullavarad, NV Hullavarad & PC Karulkar
Center for Superconductivity Research, University of Maryland, College Park, MD, 20742, USA
A Luykx & P Valdivia

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SS Hullavarad
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NV Hullavarad
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PC Karulkar
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A Luykx
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P Valdivia
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Correspondence to SS Hullavarad.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Hullavarad, S., Hullavarad, N., Karulkar, P. et al. Ultra violet sensors based on nanostructured ZnO spheres in network of nanowires: a novel approach. Nanoscale Res Lett 2, 161 (2007). https://doi.org/10.1007/s11671-007-9048-6

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Received: 03 December 2006
Accepted: 09 February 2007
Published: 03 March 2007
DOI: https://doi.org/10.1007/s11671-007-9048-6

Keywords

UV Sensor
Nano structures
Micro-spheres
Nanowire network
Rise/Decay time
Photoresponse
Photoluminescence