eprintid: 17101
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/71/01
datestamp: 2023-12-19 03:23:33
lastmod: 2023-12-19 03:23:33
status_changed: 2023-12-19 03:07:28
type: article
metadata_visibility: show
creators_name: Gupta, M.
creators_name: Hawari, H.F.
creators_name: Kumar, P.
creators_name: Burhanudin, Z.A.
title: Copper Oxide/Functionalized Graphene Hybrid Nanostructures for Room Temperature Gas Sensing Applications
ispublished: pub
note: cited By 17
abstract: Oxide semiconductors are conventionally used as sensing materials in gas sensors, however, there are limitations on the detection of gases at room temperature (RT). In this work, a hybrid of copper oxide (CuO) with functionalized graphene (rGO) is proposed to achieve gas sensing at RT. The combination of a high surface area and the presence of many functional groups in the CuO/rGO hybrid material makes it highly sensitive for gas absorption and desorption. To prepare the hybrid material, a copper oxide suspension synthesized using a copper acetate precursor is added to a graphene oxide solution during its reduction using ascorbic acid. Material properties of the CuO/rGO hybrid and its drop-casted thin-films are investigated using Raman, FTIR, SEM, TEM, and four-point probe measurement systems. We found that the hybrid material was enriched with oxygen functional groups (OFGs) and defective sites, along with good electrical conductivity (Sheet resistance~1.5 kΩ/�). The fabricated QCM (quartz crystal microbalance) sensor with a thin layer of the CuO/rGO hybrid demonstrated a high sensing response which was twice the response of the rGO-based sensor for CO2 gas at RT. We believe that the CuO/rGO hybrid is highly suitable for existing and future gas sensors used for domestic and industrial safety. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
date: 2022
publisher: MDPI
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124814584&doi=10.3390%2fcryst12020264&partnerID=40&md5=0228db483fb33b614b164479b44cda84
id_number: 10.3390/cryst12020264
full_text_status: none
publication: Crystals
volume: 12
number: 2
refereed: TRUE
issn: 20734352
citation:   Gupta, M. and Hawari, H.F. and Kumar, P. and Burhanudin, Z.A.  (2022) Copper Oxide/Functionalized Graphene Hybrid Nanostructures for Room Temperature Gas Sensing Applications.  Crystals, 12 (2).   ISSN 20734352