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Study of single element chemical sensor devices based on semiconducting metal oxide materials

Grant number: 17/26219-0
Support type:Regular Research Grants
Duration: May 01, 2018 - April 30, 2020
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
Principal Investigator:Marcelo Ornaghi Orlandi
Grantee:Marcelo Ornaghi Orlandi
Home Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
Assoc. researchers:Anderson André Felix ; Mario Cilense ; Pedro Henrique Suman ; Ranilson Angelo da Silva


A detailed study of the gas sensor response of sensor devices based on 1D nanostructures is proposed in this project. For this, different stoichiometries of tin oxide (SnO2, SnO and Sn3O4) nanobelts, synthesized by the carbothermal reduction method, will be used as sensor elements. The materials will be characterized by X-ray diffraction (XRD), high-resolution transmission (TEM) and scanning (SEM) electron microscopy, atomic force microscopy (AFM) and X-ray and ultraviolet photoelectron spectroscopy (XPS and UPS). Sputtering and dual-beam microscopy (focused ion beam, FIB) will be used to assemble the sensor devices composed only of (a) an n-type semiconductor nanostructure (b) a p-type semiconductor nanostructure and (c) two crossed semiconductor nanostructures (one n-type and one p-type) in order to create p-n junctions. Gas sensor response of the sensor will be analyzed after exposure to low concentrations (in ppm range) of oxidizing and reducing gases at different operating temperatures. The major challenge of this work will be to build and characterize a "3-in-1" gas sensor device with a special design that allows simultaneous study of the sensor properties of each channel (p-channel, n-channel and p-n-channel) independently in a single device. The focus will be to understand how to optimize gas sensor performance that could enable the development of unique low power and high-performance gas sensor devices with great potential for future technological applications within the nanotechnology field. (AU)

Scientific publications (6)
(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)
FELIX, A. A.; SILVA, R. A.; ORLANDI, M. O. Layered alpha-MoO3 nanoplates for gas sensing applications. CrystEngComm, v. 22, n. 27, p. 4640-4649, JUL 21 2020. Web of Science Citations: 0.
FREIRE, RAFAEL L. H.; MASTEGHIN, MATEUS G.; DA SILVA, JUAREZ L. F.; ORLANDI, MARCELO O. Sn3O4 exfoliation process investigated by density functional theory and modern scotch-tape experiment. COMPUTATIONAL MATERIALS SCIENCE, v. 170, DEC 2019. Web of Science Citations: 0.
MASTEGHIN, MATEUS G.; GODOI, DENIS R. M.; ORLANDI, MARCELO O. Heating Method Effect on SnO Micro-Disks as NO2 Gas Sensor. FRONTIERS IN MATERIALS, v. 6, JUL 16 2019. Web of Science Citations: 0.
HUDA, A.; SUMAN, P. H.; TORQUATO, L. D. M.; SILVA, BIANCA F.; HANDOKO, C. T.; GULO, F.; ZANONI, M. V. B.; ORLANDI, M. O. Visible light-driven photoelectrocatalytic degradation of acid yellow 17 using Sn3O4 flower-like thin films supported on Ti substrate (Sn3O4/TiO2/Ti). JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, v. 376, p. 196-205, MAY 1 2019. Web of Science Citations: 4.
RODRIGUES, ALINE V.; ORLANDI, MARCELO O. Study of intense photoluminescence from monodispersed beta-Ga2O3 ellipsoidal structures. CERAMICS INTERNATIONAL, v. 45, n. 4, p. 5023-5029, MAR 2019. Web of Science Citations: 1.
MASTEGHIN, MATEUS G.; ORLANDI, MARCELO O. A Gas Sensor Based on a Single SnO Micro-Disk. SENSORS, v. 18, n. 10 OCT 2018. Web of Science Citations: 4.

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