ZnO-based oxygen sensor assisted by UV light

• Grant number: 19/03934-0
• Support Opportunities: Scholarships in Brazil - Master
• Start date: July 01, 2019
• End date: August 31, 2021
• Field of knowledge: Engineering - Materials and Metallurgical Engineering
• Principal Investigator: Neri Alves
• Grantee: Mayk Rodrigues do Nascimento
• Host Institution: Faculdade de Ciências e Tecnologia (FCT). Universidade Estadual Paulista (UNESP). Campus de Presidente Prudente. Presidente Prudente , SP, Brazil

Abstract

Printed electronics presents great potential for sensors developing that can be manufactured directly in personal adornments, cards, packaging and others. Zinc oxide (ZnO) films, obtained by printing organic precursor solutions or by printing nanoparticles dispersion, have been widely studied as UV radiation and gas sensor. Among the various gases that can be detected by ZnO-based sensors the oxygen stands out. Indeed, there is great interest in oxygen sensors operating at low temperatures for different concentrations. For example, its detection is so important in environments that contain high oxygen concentration because of the risk of explosion, and also in low concentration because the harmful to health. The goal of this project is to use ZnO films deposited by spray pyrolysis as an oxygen sensor assisted by UV radiation, that is, to obtain a sensor whose thermal activation is replaced by UV radiation operating at low temperatures. The main focus is the relaxation times and the responsivity studies of photoresistors, and transistors with different gate polarizations. The response of these devices will be characterized in an atmosphere with differents oxygen and humidity concentrations, and also, will be evaluated the possibility of moisture independent oxygen detection. (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)

NASCIMENTO, MAYK RODRIGUES; VIEIRA, DOUGLAS HENRIQUE; NOGUEIRA, GABRIEL LEONARDO; ALVES, NERI. Low-Cost, Printed Memristor or Using Indigo and a Dispersion of Colloidal Graphite Deposited by Spray Coating. IEEE ELECTRON DEVICE LETTERS, v. 42, n. 10, p. 1468-1471, OCT 2021. (19/03934-0)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

NASCIMENTO, Mayk Rodrigues do. Gas sensor ZnO-based assisted by UV light. 2022. Master's Dissertation - Universidade Estadual Paulista (Unesp). Faculdade de Ciências e Tecnologia. Presidente Prudente Presidente Prudente.