| Title: | Silver Enhances Hematite Nanoparticles Based Ethanol Sensor Response and Selectivity at Room Temperature |
| Author(s): | Garcia-Osorio D; Hidalgo-Falla P; Peres HEM; Goncalves JM; Araki K; Garcia-Segura S; Picasso G; |
| Address: | "Laboratory of Physical Chemistry Research, Faculty of Sciences, National University of Engineering, Av. Tupac Amaru 210, 15333 Lima, Peru. Laboratory of Nanotechnology, Faculty of Gama, Area Especial de Industria Projecao A, UNB-DF-480, University of Brasilia, Gama Leste, 72444-240 Brasilia, Brazil. Department of Electronic System Engineering, EPUSP, University of Sao Paulo, Av. Prof. Luciano Gualberto, 158, Trav. 3, 05508-900 Sao Paulo, Brazil. Department of Fundamental Chemistry, Institute of Chemistry, University of Sao Paulo, Av. Prof. Lineu Prestes 748, Butanta, 05508-000 Sao Paulo, Brazil. 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" |
| ISSN/ISBN: | 1424-8220 (Electronic) 1424-8220 (Linking) |
| Abstract: | "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 degrees C) measurements based on hematite (alpha?ª╡Fe(2)O(3))/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 2-35 mg L(-1) range with an excellent linear relationship. In addition, the alpha-Fe(2)O(3)/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" |
| Keywords: | alcohol sensor hematite (alpha-Fe2O3) metal oxide gas sensors nano-enabled gas sensors silver decorated hematite; |
| Notes: | "PubMed-not-MEDLINEGarcia-Osorio, Daniel Hidalgo-Falla, Pilar Peres, Henrique E M Goncalves, Josue M Araki, Koiti Garcia-Segura, Sergi Picasso, Gino eng 237-2015/Fondo Nacional de Desarrollo Cientifico, Tecnologico y de Innovacion Tecnologica/ 2013/924725-4/Fundacao de Amparo a Pesquisa do Estado de Sao Paulo/ 2018/16896-7/Fundacao de Amparo a Pesquisa do Estado de Sao Paulo/ 401581/2016-0/Conselho Nacional de Desenvolvimento Cientifico e Tecnologico/ 141853/2015-8/Conselho Nacional de Desenvolvimento Cientifico e Tecnologico/ 131863/2016-9/Conselho Nacional de Desenvolvimento Cientifico e Tecnologico/ Switzerland 2021/01/14 Sensors (Basel). 2021 Jan 9; 21(2):440. doi: 10.3390/s21020440" |
