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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Efficient electrochemical biosensors for ethynylestradiol based on the laccase enzyme supported on single walled carbon nanotubes decorated with nanocrystalline carbon quantum dots

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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