ZnO decorated luminescent graphene as a potential gas sensor at room temperature

Gaurav Singh, Anshul Choudhary, D. Haranath, Amish G. Joshi, Nahar Singh, Sukhvir Singh, Renu Pasricha

Research output: Contribution to journalArticle

Abstract

We present a simplistic single step synthesis and a detailed study of the remarkable room temperature gas sensing and photoluminescence (PL) properties of zinc oxide (ZnO) decorated graphene oxide sheets (GrO). Investigation of opto-electronic properties reveal near UV to blue PL and semiconducting behavior of ZnO-GrO sheets. ZnO nano-crystallites serve the dual purpose of acting as a nano-spacer between dried graphene sheets as well as a primary sensing transducer for the gas sensing applications. PL has been used as a tool to study the defects associated with the surface of the nanocrystallite's trap levels and/or acceptor-donor recombinations. Time-resolved PL was used to determine free carrier or exciton lifetimes, a vital parameter related to quality of composite and device performance. Results are presented for the detection of common industrial toxins like CO, NH3 and NO for concentrations as low as 1 ppm at room temperature. A large sensor response and quick recovery time was observed at room temperature with preferred selectivity towards electron donor gases like CO and NH3.

Original languageEnglish (US)
Pages (from-to)385-394
Number of pages10
JournalCarbon
Volume50
Issue number2
DOIs
StatePublished - Feb 1 2012

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Zinc Oxide
Graphite
Zinc oxide
Chemical sensors
Graphene
Photoluminescence
Gases
Carbon Monoxide
Oxides
Temperature
Crystallites
Excitons
Electronic properties
Transducers
Recovery
Defects
Electrons
Sensors
Composite materials

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Singh, G., Choudhary, A., Haranath, D., Joshi, A. G., Singh, N., Singh, S., & Pasricha, R. (2012). ZnO decorated luminescent graphene as a potential gas sensor at room temperature. Carbon, 50(2), 385-394. https://doi.org/10.1016/j.carbon.2011.08.050

ZnO decorated luminescent graphene as a potential gas sensor at room temperature. / Singh, Gaurav; Choudhary, Anshul; Haranath, D.; Joshi, Amish G.; Singh, Nahar; Singh, Sukhvir; Pasricha, Renu.

In: Carbon, Vol. 50, No. 2, 01.02.2012, p. 385-394.

Research output: Contribution to journalArticle

Singh, G, Choudhary, A, Haranath, D, Joshi, AG, Singh, N, Singh, S & Pasricha, R 2012, 'ZnO decorated luminescent graphene as a potential gas sensor at room temperature', Carbon, vol. 50, no. 2, pp. 385-394. https://doi.org/10.1016/j.carbon.2011.08.050
Singh G, Choudhary A, Haranath D, Joshi AG, Singh N, Singh S et al. ZnO decorated luminescent graphene as a potential gas sensor at room temperature. Carbon. 2012 Feb 1;50(2):385-394. https://doi.org/10.1016/j.carbon.2011.08.050
Singh, Gaurav ; Choudhary, Anshul ; Haranath, D. ; Joshi, Amish G. ; Singh, Nahar ; Singh, Sukhvir ; Pasricha, Renu. / ZnO decorated luminescent graphene as a potential gas sensor at room temperature. In: Carbon. 2012 ; Vol. 50, No. 2. pp. 385-394.
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