{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,9]],"date-time":"2026-10-09T22:10:28Z","timestamp":1791583828642,"version":"4.3.4"},"reference-count":48,"publisher":"IOP Publishing","issue":"15","license":[{"start":{"date-parts":[[2020,1,23]],"date-time":"2020-01-23T00:00:00Z","timestamp":1579737600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/publishingsupport.iopscience.iop.org\/iop-standard\/v1"},{"start":{"date-parts":[[2020,1,23]],"date-time":"2020-01-23T00:00:00Z","timestamp":1579737600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/info\/page\/text-and-data-mining"}],"content-domain":{"domain":["iopscience.iop.org"],"crossmark-restriction":false},"short-container-title":["Nanotechnology"],"published-print":{"date-parts":[[2020,4,10]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Internet of Things applications require ultra-low power, integrable into electronic circuits and mini-sized chemical sensors for automated remote air quality monitoring system. In this work, a highly sensitive and selective detection of nitrogen dioxide (NO\n                    <jats:sub>2<\/jats:sub>\n                    ) has been demonstrated by functionalizing gallium nitride (GaN) submicron wire with titania (TiO\n                    <jats:sub>2<\/jats:sub>\n                    ) nanoclusters. The two-terminal GaN\n                    <jats:italic>\/<\/jats:italic>\n                    TiO\n                    <jats:sub>2<\/jats:sub>\n                    sensor device was fabricated by top-down approach. The photo-enabled sensing makes it possible to operate this sensor at room-temperature, resulting in a significant reduction in operating power. The GaN\n                    <jats:italic>\/<\/jats:italic>\n                    TiO\n                    <jats:sub>2<\/jats:sub>\n                    sensor was able to detect NO\n                    <jats:sub>2<\/jats:sub>\n                    concentrations as low as 10 ppb in air at room temperature (20 \u00b0C) with a quick response-recovery process. The sensor was found highly selective toward NO\n                    <jats:sub>2<\/jats:sub>\n                    against other interfering gases, such as ethanol (C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>5<\/jats:sub>\n                    OH), ammonia (NH\n                    <jats:sub>3<\/jats:sub>\n                    ), sulfur dioxide (SO\n                    <jats:sub>2<\/jats:sub>\n                    ), methane (CH\n                    <jats:sub>4<\/jats:sub>\n                    ) and carbon dioxide (CO\n                    <jats:sub>2<\/jats:sub>\n                    ). Furthermore, principal component analysis has been performed to address the cross-sensitive nature of TiO\n                    <jats:sub>2<\/jats:sub>\n                    . The sensor device exhibited excellent long-term stability at room temperature and humidity and was quite stable and reliable at various environmental conditions. Continuous exposure of the device to siloxane for a one-month period has shown a very small degradation in sensor response to NO\n                    <jats:sub>2<\/jats:sub>\n                    . Finally, interaction of NO\n                    <jats:sub>2<\/jats:sub>\n                    gas molecules with the GaN\n                    <jats:italic>\/<\/jats:italic>\n                    TiO\n                    <jats:sub>2<\/jats:sub>\n                    sensor has been modeled and explained under the light of energy band diagram. The photoinduced oxygen desorption and subsequent charge transfer between TiO\n                    <jats:sub>2<\/jats:sub>\n                    nanoclusters and NO\n                    <jats:sub>2<\/jats:sub>\n                    molecules modulate the depletion region width within the GaN, thus contributing to a high performance NO\n                    <jats:sub>2<\/jats:sub>\n                    gas sensing.\n                  <\/jats:p>","DOI":"10.1088\/1361-6528\/ab6685","type":"journal-article","created":{"date-parts":[[2019,12,31]],"date-time":"2019-12-31T17:30:15Z","timestamp":1577813415000},"page":"155504","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":32,"title":["Reliable anatase-titania nanoclusters functionalized GaN sensor devices for UV assisted NO\n                    <sub>2<\/sub>\n                    gas-sensing in ppb level"],"prefix":"10.1088","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0070-8872","authenticated-orcid":false,"given":"Md Ashfaque Hossain","family":"Khan","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brian","family":"Thomson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ratan","family":"Debnath","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Asha","family":"Rani","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abhishek","family":"Motayed","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mulpuri V","family":"Rao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"266","published-online":{"date-parts":[[2020,1,23]]},"reference":[{"key":"nanoab6685bib1","article-title":"Acute toxicity of nitrogen dioxide","author":"National Research Council Subcommittee on Rocket-Emission Toxicants","year":"1998","type":"book"},{"key":"nanoab6685bib2","doi-asserted-by":"publisher","first-page":"467","DOI":"10.1038\/nature22086","type":"journal-article","article-title":"Impacts and mitigation of excess diesel-related NOx emissions in 11 major vehicle markets","volume":"545","author":"Anenberg","year":"2017","journal-title":"Nature"},{"key":"nanoab6685bib3","doi-asserted-by":"publisher","first-page":"1677","DOI":"10.1016\/0004-6981(89)90052-8","type":"journal-article","article-title":"Domestic air pollution from biomass burning in Kenya","volume":"23","author":"Boleij","year":"1967","journal-title":"Atmos. 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All rights, including for text and data mining, AI training, and similar technologies, are reserved.","name":"copyright_information","label":"Copyright Information"},{"value":"2019-10-09","name":"date_received","label":"Date Received","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2019-12-31","name":"date_accepted","label":"Date Accepted","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2020-01-23","name":"date_epub","label":"Online publication date","group":{"name":"publication_dates","label":"Publication dates"}}]}}