| Full text | |
| Author(s): |
Canevari, T. C.
;
Cincotto, F. H.
;
Nakamura, M.
;
Machado, S. A. S.
;
Toma, H. E.
Total Authors: 5
|
| Document type: | Journal article |
| Source: | ANALYTICAL METHODS; v. 8, n. 39, p. 7254-7259, 2016. |
| Web of Science Citations: | 3 |
| Abstract | |
A new hybrid nanomaterial based on single-walled carbon nanotubes incorporating nanocrystalline carbon quantum dots (SWCNT/C-dots) was developed and characterized by means of high resolution transmission electron microscopy, atomic force microscopy, Raman spectroscopy and electrochemical techniques. A glassy carbon electrode modified with SWCNT/C-dots exhibited an enhanced electrocatalytic response for 17 alpha-ethynylestradiol, reflecting an increase of the active area of the hybrid material, promoted by the C-dots. However, the best activity was observed for laccase immobilized on CGE/SWCNT/C-dots, suggesting that the nanocrystalline C-dots improve the electron transport between the substrate, SWCNTs and the copper ions in the enzyme active sites. Such an association provided a very efficient bioelectrochemical sensor for the 17 alpha-ethynylestradiol endocrine interfering agent, with a detection limit of 4.0 nmol L-1 in real samples. (AU) | |
| FAPESP's process: | 13/24725-4 - Supramolecular chemistry and nanotechnology |
| Grantee: | Henrique Eisi Toma |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 12/18339-1 - Detection of endocrine disruptors testosterone and estradiol in environmental samples utilizing modified electrodes with graphene, the gold nanoparticles and quantum dots. |
| Grantee: | Fernando Henrique Cincotto |
| Support Opportunities: | Scholarships in Brazil - Doctorate |