{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,22]],"date-time":"2026-06-22T20:48:33Z","timestamp":1782161313233,"version":"3.54.5"},"reference-count":52,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2021,1,9]],"date-time":"2021-01-09T00:00:00Z","timestamp":1610150400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100010751","name":"Fondo Nacional de Desarrollo Cient\u00edfico, Tecnol\u00f3gico y de Innovaci\u00f3n Tecnol\u00f3gica","doi-asserted-by":"publisher","award":["237-2015"],"award-info":[{"award-number":["237-2015"]}],"id":[{"id":"10.13039\/501100010751","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001807","name":"Funda\u00e7\u00e3o de Amparo \u00e0 Pesquisa do Estado de S\u00e3o Paulo","doi-asserted-by":"publisher","award":["2013\/924725-4"],"award-info":[{"award-number":["2013\/924725-4"]}],"id":[{"id":"10.13039\/501100001807","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001807","name":"Funda\u00e7\u00e3o de Amparo \u00e0 Pesquisa do Estado de S\u00e3o Paulo","doi-asserted-by":"publisher","award":["2018\/16896-7"],"award-info":[{"award-number":["2018\/16896-7"]}],"id":[{"id":"10.13039\/501100001807","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003593","name":"Conselho Nacional de Desenvolvimento Cient\u00edfico e Tecnol\u00f3gico","doi-asserted-by":"publisher","award":["401581\/2016-0"],"award-info":[{"award-number":["401581\/2016-0"]}],"id":[{"id":"10.13039\/501100003593","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003593","name":"Conselho Nacional de Desenvolvimento Cient\u00edfico e Tecnol\u00f3gico","doi-asserted-by":"publisher","award":["141853\/2015-8"],"award-info":[{"award-number":["141853\/2015-8"]}],"id":[{"id":"10.13039\/501100003593","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003593","name":"Conselho Nacional de Desenvolvimento Cient\u00edfico e Tecnol\u00f3gico","doi-asserted-by":"publisher","award":["131863\/2016-9"],"award-info":[{"award-number":["131863\/2016-9"]}],"id":[{"id":"10.13039\/501100003593","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Gas sensors are fundamental for continuous online monitoring of volatile organic compounds. Gas sensors based on semiconductor materials have demonstrated to be highly competitive, but are generally made of expensive materials and operate at high temperatures, which are drawbacks of these technologies. Herein is described a novel ethanol sensor for room temperature (25 \u00b0C) measurements based on hematite (\u03b1\u2011Fe2O3)\/silver nanoparticles. The AgNPs were shown to increase the oxide semiconductor charge carrier density, but especially to enhance the ethanol adsorption rate boosting the selectivity and sensitivity, thus allowing quantification of ethanol vapor in 2\u201335 mg L\u22121 range with an excellent linear relationship. In addition, the \u03b1-Fe2O3\/Ag 3.0 wt% nanocomposite is cheap, and easy to make and process, imparting high perspectives for real applications in breath analyzers and\/or sensors in food and beverage industries. This work contributes to the advance of gas sensing at ambient temperature as a competitive alternative for quantification of conventional volatile organic compounds.<\/jats:p>","DOI":"10.3390\/s21020440","type":"journal-article","created":{"date-parts":[[2021,1,10]],"date-time":"2021-01-10T23:03:42Z","timestamp":1610319822000},"page":"440","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Silver Enhances Hematite Nanoparticles Based Ethanol Sensor Response and Selectivity at Room Temperature"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7108-9167","authenticated-orcid":false,"given":"Daniel","family":"Garcia-Osorio","sequence":"first","affiliation":[{"name":"Laboratory of Physical Chemistry Research, Faculty of Sciences, National University of Engineering, Av. Tupac Amaru 210, 15333 Lima, Peru"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pilar","family":"Hidalgo-Falla","sequence":"additional","affiliation":[{"name":"Laboratory of Nanotechnology, Faculty of Gama, Area Especial de Ind\u00fastria Proje\u00e7\u00e3o A, UNB\u2014DF-480, University of Brasilia, Gama Leste, 72444-240 Brasilia, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3427-8380","authenticated-orcid":false,"given":"Henrique E. M.","family":"Peres","sequence":"additional","affiliation":[{"name":"Department of Electronic System Engineering, EPUSP, University of S\u00e3o Paulo, Av. Prof. Luciano Gualberto, 158, Trav. 3, 05508-900 S\u00e3o Paulo, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0800-077X","authenticated-orcid":false,"given":"Josue M.","family":"Gon\u00e7alves","sequence":"additional","affiliation":[{"name":"Department of Fundamental Chemistry, Institute of Chemistry, University of S\u00e3o Paulo, Av. Prof. Lineu Prestes 748, Butanta, 05508-000 S\u00e3o Paulo, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Koiti","family":"Araki","sequence":"additional","affiliation":[{"name":"Department of Fundamental Chemistry, Institute of Chemistry, University of S\u00e3o Paulo, Av. Prof. Lineu Prestes 748, Butanta, 05508-000 S\u00e3o Paulo, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1417-6416","authenticated-orcid":false,"given":"Sergi","family":"Garcia-Segura","sequence":"additional","affiliation":[{"name":"Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287-3005, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gino","family":"Picasso","sequence":"additional","affiliation":[{"name":"Laboratory of Physical Chemistry Research, Faculty of Sciences, National University of Engineering, Av. 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