| Texto completo | |
| Autor(es): |
Muniz Jr., W.
;
Alves, R. T.
;
Braga, L. M.
;
Terceiro, P. S.
;
Barros, V. P. O.
;
Landell, M. F.
;
Mastelaro, V. R.
;
de Oliveira, I. N.
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY; v. 469, p. 10-pg., 2025-12-01. |
| Resumo | |
The presence of toxic residues in water and food is a constant concern that requires the development of fast and low-cost analytical methods for controlling and monitoring environmental conditions and physicochemical processes. In this context, the current study examines the physical and chemical properties of carbon dots (CD-ANS) produced through hydrothermal synthesis using 5-amino-2-naphthalenesulfonic acid (ANS) as a precursor. Different experimental techniques are used to characterize CD-ANS's shape and photoluminescent properties. Our results show that such carbon dots are co-doped with nitrogen and sulfur, displaying a broad emission spectrum sensitive to small environmental changes. In particular, CD-ANS exhibits an activated fluorescence in the presence of certain organic pollutants, thus being suitable for various chemosensing applications, including ratiometric sensing of pH, methanol, and a carbamate pesticide (methomyl). Thermal effects on the nanoparticle's photoluminescence are also analyzed, where the occurrence of a thermally-activated mechanism is identified. The possibility of using CD-ANS in staining yeast cells has also been investigated. These findings suggest that the carbon dots derived from ANS can be a versatile fluorescent platform for various physical, chemical, and biological applications. (AU) | |
| 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: | 14/50983-3 - INCT 2014: fluidos complexos |
| Beneficiário: | Antonio Martins Figueiredo Neto |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |