| Texto completo | |
| Autor(es): |
Komorizono, Amanda Akemy
;
Leite, Ramon Resende
;
de la Flor, Silvia
;
Llobet, Eduard
;
Mastelaro, Valmor Roberto
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING; v. 188, p. 13-pg., 2024-12-21. |
| Resumo | |
In recent decades, there has been extensive research into sensors for detecting toxic gases and volatile organic compounds (VOCs). However, creating a gas sensor that combines high sensitivity, selectivity, and stability at room temperature (RT) remains challenging. Additionally, there is a growing need for flexible gas sensors that can monitor environmental conditions in real-time, suitable for use in accessories like bracelets and watches or even integrated into clothing. This study focuses on developing a flexible rGO-ZnO-based gas sensor deposited on a polyethylene terephthalate (PET) substrate for detecting NO2 at room temperature using a fast, simple, and cost-effective methodology. Scanning Electron Microscopy (SEM) images reveal that the rGO-ZnO sensor consists of rGO sheets adorned with ZnO nanoparticles. Measurements show that the formation of rGO-ZnO heterostructures significantly enhances the sensor's response to NO2 at RT compared to pure ZnO. The rGO provides a conductive pathway for efficient charge transport, while ZnO increases the number of active sites available for NO2 molecule adsorption, leading to improved sensor performance. Moreover, the rGO-ZnO sensor exhibits high selectivity for NO2 compared to other tested gases and demonstrates minimal change in response even after multiple bending cycles. In conclusion, our findings suggest that the rGO-ZnO flexible sensor offers excellent response, stability, flexibility, and selectivity, highlighting its potential for integration into clothing and accessories for real-time NO2 monitoring at room temperature. (AU) | |
| Processo FAPESP: | 19/22076-5 - Nanocompósitos a base de grafeno reduzido (rGO) e óxidos semicondutores metálicos (MOS) para aplicação como sensores de gases tóxicos |
| Beneficiário: | Valmor Roberto Mastelaro |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais |
| Beneficiário: | Elson Longo da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 23/00913-8 - Desenvolvimento de sensores de gases flexíveis a base de tintas condutoras de rGO e rGO/ZnO para detecção de NO2 e NH3 |
| Beneficiário: | Amanda Akemy Komorizono |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |
| Processo FAPESP: | 22/03325-7 - Desenvolvimento de sensores de gases flexíveis a base de tintas condutoras de rGO e rGO/ZnO para detecção de NO2 e NH3 |
| Beneficiário: | Amanda Akemy Komorizono |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |