Probing gas response of pure and Au modified ZnO nanowires network using work function measurements

Preetam K. Sharma; Niranjan S. Ramgir; N. Datta; M. Kaur; C. P. Goyal; S. Kailasaganapathi; A. K. Debnath; D. K. Aswal; S. K. Gupta

doi:10.1063/1.4791053

Probing gas response of pure and Au modified ZnO nanowires network using work function measurements

Preetam K. Sharma, Niranjan S. Ramgir, N. Datta, M. Kaur, C. P. Goyal, S. Kailasaganapathi, A. K. Debnath, D. K. Aswal, S. K. Gupta

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Citations (Scopus)

Abstract

Work function of the material is a strong indicator of the state of a surface and its surrounding. Au being an excellent promoter for H2S, work function changes of pure and Au modified ZnO network films upon exposure to gas have been investigated using Kelvin probe method. Au modified ZnO sample exhibited a work function of 5.42 eV which is ∼320 meV higher than that of pure ZnO sample (5.10 eV). This increase could be attributed to the nano-Schottky type of barrier junction formed between Au and ZnO nanowires. Exposure to H₂S resulted in decrease of work function for both pure and Au modified ZnO NWs network films. H₂S being reducing in nature, this decrease can be accounted on the basis of Fermi level shift due to large number of electrons that the gas donates to the matrix upon interaction with adsorbed oxygen species.

Original language	English
Title of host publication	Solid State Physics - Proceedings of the 57th DAE Solid State Physics Symposium 2012
Publisher	American Institute of Physics Inc.
Pages	346-347
Number of pages	2
Volume	1512
ISBN (Print)	9780735411333
DOIs	https://doi.org/10.1063/1.4791053
Publication status	Published (in print/issue) - 15 Mar 2013
Event	57th DAE Solid State Physics Symposium 2012 - Bombay, Mumbai, India Duration: 3 Dec 2012 → 7 Dec 2012

Conference

Conference	57th DAE Solid State Physics Symposium 2012
Country/Territory	India
City	Bombay, Mumbai
Period	3/12/12 → 7/12/12

Keywords

Au
HS
nanowire
work function
ZnO

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10.1063/1.4791053

Cite this

Sharma, P. K., Ramgir, N. S., Datta, N., Kaur, M., Goyal, C. P., Kailasaganapathi, S., Debnath, A. K., Aswal, D. K., & Gupta, S. K. (2013). Probing gas response of pure and Au modified ZnO nanowires network using work function measurements. In Solid State Physics - Proceedings of the 57th DAE Solid State Physics Symposium 2012 (Vol. 1512, pp. 346-347). American Institute of Physics Inc.. https://doi.org/10.1063/1.4791053

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title = "Probing gas response of pure and Au modified ZnO nanowires network using work function measurements",

abstract = "Work function of the material is a strong indicator of the state of a surface and its surrounding. Au being an excellent promoter for H2S, work function changes of pure and Au modified ZnO network films upon exposure to gas have been investigated using Kelvin probe method. Au modified ZnO sample exhibited a work function of 5.42 eV which is ∼320 meV higher than that of pure ZnO sample (5.10 eV). This increase could be attributed to the nano-Schottky type of barrier junction formed between Au and ZnO nanowires. Exposure to H2S resulted in decrease of work function for both pure and Au modified ZnO NWs network films. H2S being reducing in nature, this decrease can be accounted on the basis of Fermi level shift due to large number of electrons that the gas donates to the matrix upon interaction with adsorbed oxygen species.",

keywords = "Au, HS, nanowire, work function, ZnO",

author = "Sharma, {Preetam K.} and Ramgir, {Niranjan S.} and N. Datta and M. Kaur and Goyal, {C. P.} and S. Kailasaganapathi and Debnath, {A. K.} and Aswal, {D. K.} and Gupta, {S. K.}",

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doi = "10.1063/1.4791053",

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isbn = "9780735411333",

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pages = "346--347",

booktitle = "Solid State Physics - Proceedings of the 57th DAE Solid State Physics Symposium 2012",

publisher = "American Institute of Physics Inc.",

note = "57th DAE Solid State Physics Symposium 2012 ; Conference date: 03-12-2012 Through 07-12-2012",

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Sharma, PK, Ramgir, NS, Datta, N, Kaur, M, Goyal, CP, Kailasaganapathi, S, Debnath, AK, Aswal, DK & Gupta, SK 2013, Probing gas response of pure and Au modified ZnO nanowires network using work function measurements. in Solid State Physics - Proceedings of the 57th DAE Solid State Physics Symposium 2012. vol. 1512, American Institute of Physics Inc., pp. 346-347, 57th DAE Solid State Physics Symposium 2012, Bombay, Mumbai, India, 3/12/12. https://doi.org/10.1063/1.4791053

Probing gas response of pure and Au modified ZnO nanowires network using work function measurements. / Sharma, Preetam K.; Ramgir, Niranjan S.; Datta, N. et al.

Solid State Physics - Proceedings of the 57th DAE Solid State Physics Symposium 2012. Vol. 1512 American Institute of Physics Inc., 2013. p. 346-347.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Sharma, Preetam K.

AU - Ramgir, Niranjan S.

AU - Datta, N.

AU - Kaur, M.

AU - Goyal, C. P.

AU - Kailasaganapathi, S.

AU - Debnath, A. K.

AU - Aswal, D. K.

AU - Gupta, S. K.

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N2 - Work function of the material is a strong indicator of the state of a surface and its surrounding. Au being an excellent promoter for H2S, work function changes of pure and Au modified ZnO network films upon exposure to gas have been investigated using Kelvin probe method. Au modified ZnO sample exhibited a work function of 5.42 eV which is ∼320 meV higher than that of pure ZnO sample (5.10 eV). This increase could be attributed to the nano-Schottky type of barrier junction formed between Au and ZnO nanowires. Exposure to H2S resulted in decrease of work function for both pure and Au modified ZnO NWs network films. H2S being reducing in nature, this decrease can be accounted on the basis of Fermi level shift due to large number of electrons that the gas donates to the matrix upon interaction with adsorbed oxygen species.

AB - Work function of the material is a strong indicator of the state of a surface and its surrounding. Au being an excellent promoter for H2S, work function changes of pure and Au modified ZnO network films upon exposure to gas have been investigated using Kelvin probe method. Au modified ZnO sample exhibited a work function of 5.42 eV which is ∼320 meV higher than that of pure ZnO sample (5.10 eV). This increase could be attributed to the nano-Schottky type of barrier junction formed between Au and ZnO nanowires. Exposure to H2S resulted in decrease of work function for both pure and Au modified ZnO NWs network films. H2S being reducing in nature, this decrease can be accounted on the basis of Fermi level shift due to large number of electrons that the gas donates to the matrix upon interaction with adsorbed oxygen species.

KW - Au

KW - HS

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BT - Solid State Physics - Proceedings of the 57th DAE Solid State Physics Symposium 2012

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T2 - 57th DAE Solid State Physics Symposium 2012

Y2 - 3 December 2012 through 7 December 2012

ER -

Probing gas response of pure and Au modified ZnO nanowires network using work function measurements

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