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Entree

Modeling effects of sensor response of semiconducting oxide with functionalized nanoparticles

Processo: 12/51195-3
Linha de fomento:Auxílio à Pesquisa - Regular
Vigência: 01 de janeiro de 2013 - 28 de fevereiro de 2015
Área do conhecimento:Engenharias - Engenharia de Materiais e Metalúrgica - Materiais Não-metálicos
Convênio/Acordo: MIT
Pesquisador responsável:José Arana Varela
Beneficiário:José Arana Varela
Pesq. responsável no exterior: Harry L. Tuller
Instituição no exterior: Massachusetts Institute of Technology (MIT), Estados Unidos
Instituição-sede: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brasil
Vinculado ao auxílio:98/14324-0 - Multidisciplinary Center for Development of Ceramic Materials, AP.CEPID
Assunto(s):Semicondutores  Sensores  Propriedades elétricas  Pós nanométricos 

Resumo

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)

Publicações científicas (4)
(Referências obtidas automaticamente do Web of Science e do SciELO, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores)
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. Citações Web of Science: 0.
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. Citações Web of Science: 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. Citações Web of Science: 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. Citações Web of Science: 20.

Por favor, reporte erros na lista de publicações científicas escrevendo para: cdi@fapesp.br.