Institut for Forretningsudvikling og Teknologi

Role of the Exposed Polar Facets in the Performance of Thermally and UV Activated ZnO Nanostructured Gas Sensors

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Role of the Exposed Polar Facets in the Performance of Thermally and UV Activated ZnO Nanostructured Gas Sensors. / Alenezi, Mohammad R.; Alshammari, Abdullah S.; Jayawardena, K.D.G. Imalka; Beliatis, Michail; Henley, Simon J.; Silva, S.R.P.

I: The Journal of Physical Chemistry Part C, Bind 117, 2013, s. 17850−17858.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

Alenezi, MR, Alshammari, AS, Jayawardena, KDGI, Beliatis, M, Henley, SJ & Silva, SRP 2013, 'Role of the Exposed Polar Facets in the Performance of Thermally and UV Activated ZnO Nanostructured Gas Sensors', The Journal of Physical Chemistry Part C, bind 117, s. 17850−17858. https://doi.org/10.1021/jp4061895

APA

Alenezi, M. R., Alshammari, A. S., Jayawardena, K. D. G. I., Beliatis, M., Henley, S. J., & Silva, S. R. P. (2013). Role of the Exposed Polar Facets in the Performance of Thermally and UV Activated ZnO Nanostructured Gas Sensors. The Journal of Physical Chemistry Part C, 117, 17850−17858. https://doi.org/10.1021/jp4061895

CBE

Alenezi MR, Alshammari AS, Jayawardena KDGI, Beliatis M, Henley SJ, Silva SRP. 2013. Role of the Exposed Polar Facets in the Performance of Thermally and UV Activated ZnO Nanostructured Gas Sensors. The Journal of Physical Chemistry Part C. 117:17850−17858. https://doi.org/10.1021/jp4061895

MLA

Vancouver

Alenezi MR, Alshammari AS, Jayawardena KDGI, Beliatis M, Henley SJ, Silva SRP. Role of the Exposed Polar Facets in the Performance of Thermally and UV Activated ZnO Nanostructured Gas Sensors. The Journal of Physical Chemistry Part C. 2013;117:17850−17858. https://doi.org/10.1021/jp4061895

Author

Alenezi, Mohammad R. ; Alshammari, Abdullah S. ; Jayawardena, K.D.G. Imalka ; Beliatis, Michail ; Henley, Simon J. ; Silva, S.R.P. / Role of the Exposed Polar Facets in the Performance of Thermally and UV Activated ZnO Nanostructured Gas Sensors. I: The Journal of Physical Chemistry Part C. 2013 ; Bind 117. s. 17850−17858.

Bibtex

@article{17922031ded14dff8b02e401d41ab1e8,
title = "Role of the Exposed Polar Facets in the Performance of Thermally and UV Activated ZnO Nanostructured Gas Sensors",
abstract = "ZnO nanostructures with different morphologies (nanowires, nanodisks, and nanostars) were synthesized hydrothermally. Gas sensing properties of the asgrown nanostructures were investigated under thermal and UV activation. The performance of the ZnO nanodisk gas sensor was found to be superior to that of other nanostructures (Sg ∼ 3700% to 300 ppm ethanol and response time and recovery time of 8 and 13 s). The enhancement in sensitivity is attributed to the surface polarities of the different structures on the nanoscale. Furthermore, the selectivity of the gas sensors can be achieved by controlling the UV intensity used to activate these sensors. The highest sensitivity value for ethanol, isopropanol, acetone, and toluene are recorded at the optimal UV intensity of 1.6, 2.4, 3.2, and 4 mW/cm2, respectively. Finally, the UV activation mechanism for metal oxide gas sensors is compared with the thermal activation process. The UV activation of analytes based on solution processed ZnO structures pave the way for better quality gas sensors.",
author = "Alenezi, {Mohammad R.} and Alshammari, {Abdullah S.} and Jayawardena, {K.D.G. Imalka} and Michail Beliatis and Henley, {Simon J.} and S.R.P. Silva",
note = "CC-BY",
year = "2013",
doi = "10.1021/jp4061895",
language = "English",
volume = "117",
pages = "17850−17858",
journal = "The Journal of Physical Chemistry Part C",
issn = "1932-7447",
publisher = "American Chemical Society",

}

RIS

TY - JOUR

T1 - Role of the Exposed Polar Facets in the Performance of Thermally and UV Activated ZnO Nanostructured Gas Sensors

AU - Alenezi, Mohammad R.

AU - Alshammari, Abdullah S.

AU - Jayawardena, K.D.G. Imalka

AU - Beliatis, Michail

AU - Henley, Simon J.

AU - Silva, S.R.P.

N1 - CC-BY

PY - 2013

Y1 - 2013

N2 - ZnO nanostructures with different morphologies (nanowires, nanodisks, and nanostars) were synthesized hydrothermally. Gas sensing properties of the asgrown nanostructures were investigated under thermal and UV activation. The performance of the ZnO nanodisk gas sensor was found to be superior to that of other nanostructures (Sg ∼ 3700% to 300 ppm ethanol and response time and recovery time of 8 and 13 s). The enhancement in sensitivity is attributed to the surface polarities of the different structures on the nanoscale. Furthermore, the selectivity of the gas sensors can be achieved by controlling the UV intensity used to activate these sensors. The highest sensitivity value for ethanol, isopropanol, acetone, and toluene are recorded at the optimal UV intensity of 1.6, 2.4, 3.2, and 4 mW/cm2, respectively. Finally, the UV activation mechanism for metal oxide gas sensors is compared with the thermal activation process. The UV activation of analytes based on solution processed ZnO structures pave the way for better quality gas sensors.

AB - ZnO nanostructures with different morphologies (nanowires, nanodisks, and nanostars) were synthesized hydrothermally. Gas sensing properties of the asgrown nanostructures were investigated under thermal and UV activation. The performance of the ZnO nanodisk gas sensor was found to be superior to that of other nanostructures (Sg ∼ 3700% to 300 ppm ethanol and response time and recovery time of 8 and 13 s). The enhancement in sensitivity is attributed to the surface polarities of the different structures on the nanoscale. Furthermore, the selectivity of the gas sensors can be achieved by controlling the UV intensity used to activate these sensors. The highest sensitivity value for ethanol, isopropanol, acetone, and toluene are recorded at the optimal UV intensity of 1.6, 2.4, 3.2, and 4 mW/cm2, respectively. Finally, the UV activation mechanism for metal oxide gas sensors is compared with the thermal activation process. The UV activation of analytes based on solution processed ZnO structures pave the way for better quality gas sensors.

U2 - 10.1021/jp4061895

DO - 10.1021/jp4061895

M3 - Journal article

C2 - 24009781

VL - 117

SP - 17850−17858

JO - The Journal of Physical Chemistry Part C

JF - The Journal of Physical Chemistry Part C

SN - 1932-7447

ER -