| Full text | |
| Author(s): |
Paschoalin, Rafaella T.
;
Gomes, Nathalia O.
;
Almeida, Gabriela F.
;
Bilatto, Stanley
;
Farinas, Cristiane S.
;
Machado, Sergio A. S.
;
Mattoso, Luiz H. C.
;
Oliveira Jr, Osvaldo N.
;
Raymundo-Pereira, Paulo A.
Total Authors: 9
|
| Document type: | Journal article |
| Source: | BIOSENSORS & BIOELECTRONICS; v. 199, p. 7-pg., 2022-03-01. |
| Abstract | |
On-site monitoring the presence of pesticides on crops and food samples is essential for precision and postharvest agriculture, which demands nondestructive analytical methods for rapid, low-cost detection that is not achievable with gold standard methods. The synergy between eco-friendly substrates and printed devices may lead to wearable sensors for decentralized analysis of pesticides in precision agriculture. In this paper we report on a wearable non-enzymatic electrochemical sensor capable of detecting carbamate and bipyridinium pesticides on the surface of agricultural and food samples. The low-cost devices (<US$ 0.08 per unit) contained threeelectrode systems deposited via screen-printing technology (SPE) on solution-blow spinning mats of poly (lactic acid) (PLA). The flexible PLA/SPE sensors can be used on flat, curved and irregular surfaces of leaves, vegetables and fruits. Detection was performed using differential pulse voltammetry and square wave voltammetry with detection limits of 43 and 57 nM for carbendazim and diquat, respectively. The wearable non-enzymatic sensor can discriminate and quantify carbendazim and diquat on apple and cabbage skins with no interference from other pesticides. The use of such wearable sensors may be extended to other agrochemicals, including with incorporation of active bio (sensing) layers for online monitoring of any type of agricultural products and foods. (AU) | |
| FAPESP's process: | 20/09587-8 - Development of electrochemical devices based on carbon and silver nanostructures to detect endocrine disruptors in quantities of water supply |
| Grantee: | Nathalia Oezau Gomes |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 16/10636-8 - From the cell factory to the Biodiesel-Bioethanol integrated biorefinery: a systems approach applied to complex problems in micro and macroscales |
| Grantee: | Roberto de Campos Giordano |
| Support Opportunities: | Program for Research on Bioenergy (BIOEN) - Thematic Grants |
| FAPESP's process: | 19/01777-5 - Manufacture of disposable electrochemical devices composed of hollow carbon nanospheres and carbon nanowires decorated with silver nanoparticles for the quantification of endocrine disruptors in supply water samples |
| Grantee: | Sergio Antonio Spinola Machado |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 18/22214-6 - Towards a convergence of technologies: from sensing and biosensing to information visualization and machine learning for data analysis in clinical diagnosis |
| Grantee: | Osvaldo Novais de Oliveira Junior |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 18/10899-4 - Utilization of residual lignocellulosic biomass from 2G ethanol processing to obtain nanocellulose via enzymatic route |
| Grantee: | Stanley Endrigo Bilatto Rodrigues |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 16/01919-6 - Design and fabrication of nanostructured flexible devices for biomarkers detection |
| Grantee: | Paulo Augusto Raymundo Pereira |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 17/18725-2 - Hybrid core-shell and Janus nanofibers obtained by solution blow spinning |
| Grantee: | Rafaella Takehara Paschoalin |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |