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Modeling effects of sensor response of semiconducting oxide with functionalized nanoparticles

Grant number: 12/51195-3
Support type:Regular Research Grants
Duration: January 01, 2013 - February 28, 2015
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
Cooperation agreement: MIT
Principal Investigator:José Arana Varela
Grantee:José Arana Varela
Principal investigator abroad: Harry L. Tuller
Institution abroad: Massachusetts Institute of Technology (MIT), United States
Home Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
Associated research grant:98/14324-0 - Multidisciplinary Center for Development of Ceramic Materials, AP.CEPID


Compliance with ever more stringent emissions regulations requires the development of reliable, sensitive, selective, fast responding, and cost-effective sensors. Nanotechnoiogy, given its ability to offer large increases in effective active area and functional interfaces, promises to overcome many of the limitations of conventional sensor devices. Semiconducting oxides serve as the basis of highly sensitive, cost effective and harsh environment compatible gas sensors. However, they commonly suffer from aging and inadequate selectivity and reproducibility. Progress is hindered by an inadequate understanding of the relationship between gas chemisorption, on the one hand, and the electronic, crystal, defect and micro- structure of the semiconductor, on the other. In this project, the Brazilian team brings advanced capabilities in synthesizing and characterizing such materials with controlled size, shape, morphological characteristics and chemical composition while the MIT team brings to bear complementary methods of sensor characterization and modeling. The exchange of personnel serves to educate students from both institutions on the often complex issues that arise in applying basic science towards solve technological challenges. Efforts initiated in 2010, including extended exchange of personnel, have exceeded the expectations of the Brazil-MIT collaborators by leading to breakthroughs in sensor performance and characterization and publications in high visibility journals. The proposed research will build on this strong foundation. (AU)

Scientific publications (4)
(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.; 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. Web of Science Citations: 3.
FELIX, A. A.; SPREITZER, M.; VENGUST, D.; SUVOROV, D.; ORLANDI, M. O. Probing the effects of oxygen-related defects on the optical and luminescence properties in CaCu3Ti4O12 ceramics. Journal of the European Ceramic Society, v. 38, n. 15, p. 5002-5006, DEC 2018. Web of Science Citations: 1.
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. Web of Science Citations: 36.
FELIX, ANDERSON A.; BEZZON, VINICIUS D. N.; ORLANDI, MARCELO O.; VENGUST, DAMJAN; SPREITZER, MATJAZ; LONGO, ELSON; SUVOROV, DANILO; VARELA, JOSE A. Role of oxygen on the phase stability and microstructure evolution of CaCu3Ti4O12 ceramics. Journal of the European Ceramic Society, v. 37, n. 1, p. 129-136, JAN 2017. Web of Science Citations: 20.

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