Quantitative study of the electronic characteristics of metal-metal oxides nanowires contacts

• Grant number: 13/19692-0
• Support type: Regular Research Grants
• Duration: May 01, 2014 - April 30, 2016
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal researcher: Adenilson José Chiquito
• Grantee: Adenilson José Chiquito
• Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Assoc. researchers: Olivia Maria Berengue

Abstract

This proposal aims to study the electronic characteristics of metal-nanowire interfaces used in the definition of nanoscale devices, especially nanowires and nanobelts constructed from common metal oxides (SnO2, mainly). A singular point for these efforts is the definition of electrical contacts that allow access to the properties of the nanowires. The presence of surface disorder leading to the localization and charge redistribution is a factor that contributes decisively to the properties of the electrical contacts in the samples. Nevertheless, little experimental information on the formation of metal-semiconductor (nanowires) junctions are available and this research proposal intends to advance this area by synthesizing pure and doped SnO2 nanowires and investigate the transport characteristics in these samples and their relationship with the interface characteristics. As a contribution to the area it is expected to study the predominant transport mechanisms in metal-semiconductor heterojunctions considering the influence and source of interface states and non-uniformities in forming the Schottky barrier in these devices. The accumulated experience in manufacturing and studying metal oxides based nanostructured materials and the available infrastructure make the investment associated with this proposal remain low while the expected results can have a good impact on literature, if one takes into account the need for a quantitative study with respect to the formation of electrical contacts and their properties in nanowires. (AU)

Scientific publications

(7)

(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)

ARANTES, ADRYELLE N.; ARAUJO, ESTACIO P.; PELLEGRINI, MANUELA; PEDERSOLI, ANDRE A.; CHIQUITO, ADENILSON J. A simple band model for ultraviolet induced ambipolarity in single SnO2 nanowire devices. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, v. 128, APR 2021. Web of Science Citations: 0.

DE ARAUJO, ESTACIO P.; ARANTES, ADRYELLE N.; COSTA, IVANI M.; CHIQUITO, ADENILSON J. Reliable Tin dioxide based nanowire networks as ultraviolet solar radiation sensors. SENSORS AND ACTUATORS A-PHYSICAL, v. 302, FEB 1 2020. Web of Science Citations: 0.

COSTA, I. M.; COLMENARES, Y. N.; PIZANI, P. S.; LEITE, E. R.; CHIQUITO, A. J. Sb doping of VLS synthesized SnO2 nanowires probed by Raman and XPS spectroscopy. Chemical Physics Letters, v. 695, p. 125-130, MAR 2018. Web of Science Citations: 8.

BERENGUE, OLIVIA M.; CHIQUITO, ADENILSON J. Direct evidence of traps controlling the carriers transport in SnO2 nanobelts. JOURNAL OF SEMICONDUCTORS, v. 38, n. 12 DEC 2017. Web of Science Citations: 0.

COSTA, I. M.; BERNARDO, E. P.; MARANGONI, B. S.; LEITE, E. R.; CHIQUITO, A. J. Metal to insulator transition in Sb doped SnO2 monocrystalline nanowires thin films. Journal of Applied Physics, v. 120, n. 22 DEC 14 2016. Web of Science Citations: 6.

MELZI, A. L. R.; CHIQUITO, A. J. The interplay between Arrhenius and hopping conduction mechanisms in a percolating nanowire network. JOURNAL OF PHYSICS D-APPLIED PHYSICS, v. 49, n. 31 AUG 10 2016. Web of Science Citations: 1.

RIAMA COELHO GOUVEIA; HANAY KAMIMURA; RAFAEL MUNHOZ; ARIANO DE GIOVANNI RODRIGUES; EDSON ROBERTO LEITE; ADENILSON JOSÉ CHIQUITO. CARACTERIZAÇÃO DE NANOFIOS DE GERMÂNIO SINTETIZADOS UTILIZANDO COBRE COMO CATALISADOR. Química Nova, v. 38, n. 6, p. 777-780, Jul. 2015.