Gas sensor response of thin films: impact of p-n junctions

• Grant number: 14/50725-4
• Support Opportunities: Regular Research Grants
• Start date: March 01, 2015
• End date: May 31, 2016
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Agreement: MIT
• Principal Investigator: José Arana Varela
• Grantee: José Arana Varela
• Principal researcher abroad: Harry Louis Tuller
• Institution abroad: Massachusetts Institute of Technology (MIT), United States
• Host Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
• Associated research grant: 13/07296-2 - CDMF - Center for the Development of Functional Materials, AP.CEPID

Abstract

In 2010, we began an international cooperation with the Massachusetts Institute of Technology (MIT), with the group of Prof. Tuller, funded by MISTI MIT and FAPESP (proc. Nº 10/51959-8) and we have had both student and faculty exchanges between both Universities. In 2012, we received another cooperation project MIT-FAPESP (proc. Nº 12/51195-3) and again we achieved student and faculty exchange between our universities. Both projects were funded to study the sensor properties of pure and doped nanostructured semiconductors. During this cooperation we obtained impressive results that were published in high impact journals in the sensor and materiais science field (Sensors & Actuators B, 2014, submitted; Sensors & Actuators B, 186, 103, 2013; Adv. Func. Mater., 23, 1759, 2013). Moreover, based on our discovery that SnO rnicro-disks exhibit exceptional sensor response to NO2 gas, we have obtained a provisional patent via the MIT- Technology Licensing Office. Based on this previous successful cooperation, now we are proposing to continue the cooperation, by studying the role that p-n junctions can play in further enhancing gas senso r sensitivity and selectivity to different gaseous analytes. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BARBOSA, MARTIN S.; SUMAN, PEDRO H.; KIM, JAE J.; TULLER, HARRY L.; VARELA, JOSE A.; ORLANDI, MARCELO O.. Gas sensor properties of Ag- and Pd-decorated SnO micro-disks to NO2, H-2 and CO: Catalyst enhanced sensor response and selectivity. SENSORS AND ACTUATORS B-CHEMICAL, v. 239, p. 253-261, FEB 2017. (13/18511-1, 12/51195-3, 13/08734-3, 14/50725-4)

BARBOSA, MARTIN S.; SUMAN, PEDRO H.; KIM, JAE J.; TULLER, HARRY L.; ORLANDI, MARCELO O.. Investigation of electronic and chemical sensitization effects promoted by Pt and Pd nanoparticles on single-crystalline SnO nanobelt-based gas sensors. SENSORS AND ACTUATORS B-CHEMICAL, v. 301, DEC 12 2019. (13/18511-1, 12/51195-3, 13/08734-3, 14/50725-4)