| Texto completo | |
| Autor(es): |
Ferreira, Davi M.
;
Paschoarelli, Mayra, V
;
de Lima, Lucas F.
;
de Araujo, William R.
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Talanta; v. 295, p. 11-pg., 2025-12-01. |
| Resumo | |
A wearable plant sensor, developed on an eco-friendly substrate, is designed for non-destructive, in-situ, and realtime pesticide analysis on plants and fruits. In this study, we introduce a wearable plant sensor fabricated on a paper substrate using the laser-scribed graphene (LSG) technique for the detection of the pesticide paraquat (PQ) in crops. A synergistic effect was observed from the combination of colorless nail polish and the chemically treated paper substrate, leading to the formation of porous, high-performance, conductive graphene-based electrodes via the LSG fabrication process. The device detects PQ by square wave voltammetry (SWV) at concentrations ranging from 0.5 to 100.0 mu mol L-1 in a 0.1 mol L-1 Britton-Robinson (BR) buffer (pH 9.0), with a limit of detection (LOD) of 0.082 mu mol L-1. The wearable plant sensor demonstrated excellent mechanical durability under repeated bending cycles, simulating real-world conditions on crops. Furthermore, it showed remarkable selectivity in the presence of commonly used pesticides and molecules typically found in natural beverage samples derived from fruits. As proof of applicability, the flexible and sustainable non-enzymatic wearable sensor was applied directly to the surfaces of fruits and leaves to detect PQ using a portable potentiostat and a smartphone. The results confirm its suitability for on-site pesticide detection, making it an effective tool for precision agriculture (PA) applications. (AU) | |
| Processo FAPESP: | 23/12589-0 - Fabricação de um arranjo de (bio)sensores eletroquímicos por gravação a laser de CO2 visando o desenvolvimento de dispositivo wearable |
| Beneficiário: | Lucas Felipe de Lima |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 22/03250-7 - Desenvolvimento de biossensores portáteis e acessíveis para diagnósticos clínicos de infecções bacterianas e virais |
| Beneficiário: | William Reis de Araujo |
| Modalidade de apoio: | Auxílio à Pesquisa - Projeto Inicial |
| Processo FAPESP: | 23/00246-1 - Dispositivos miniaturizados visando à produção em larga escala: fabricação, caracterização e aplicações in-situ |
| Beneficiário: | Mauro Bertotti |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |