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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.)

Manioc starch thin film as support of reduced graphene oxide: A novel architecture for electrochemical sensors

Full text
Author(s):
Orzari, Luiz O. [1] ; Santos, Fabricio A. [2] ; Janegitz, Bruno C. [1]
Total Authors: 3
Affiliation:
[1] Univ Fed Sao Carlos, Dept Nat Sci Math & Educ, BR-13600970 Araras, SP - Brazil
[2] Univ Sao Paulo, Inst Phys, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF ELECTROANALYTICAL CHEMISTRY; v. 823, p. 350-358, AUG 15 2018.
Web of Science Citations: 0
Abstract

The manioc starch (MS) product extracted of many Manihot species, presents low cost and film formation capability. In this work, we report the decoration of MS thin film with reduced graphene oxide to form a novel composite, which we used to modify a glassy carbon electrode for phenolic compounds detection. The characterization of the nanostructured biopolymeric film was performed by scanning electron and atomic force microscopy, electrochemical impedance, ultraviolet-visible and Fourier transform infrared spectroscopies, dynamic light scattering and cyclic voltammetry techniques. Under optimal experimental conditions, the peak currents were independently studied in the concentration range of 0.5 to 200 mu mol L-1 and 0.5 to 74 mu mol L-1 with a limit of detection of 0.07 mu mol L-1 and 0.04 mu mol L-1, for dopamine and catechol, respectively, as proof of concept. MS proved to be a great asset for supporting thin film for electroanalytical devices, which were tested in water and synthetic urine samples, with satisfactory results. (AU)

FAPESP's process: 17/21898-6 - New conductive devices for application in electrochemical sensing and biosensing
Grantee:Bruno Campos Janegitz
Support Opportunities: Regular Research Grants
FAPESP's process: 15/19099-2 - Development of electrochemical sensors and biosensors for different analytical purposes
Grantee:Bruno Campos Janegitz
Support Opportunities: Regular Research Grants
FAPESP's process: 16/12697-4 - Nanostructured sensors modified with graphene and tapioca for determination of phenolics compounds and nitrogenous bases
Grantee:Luiz Otávio Orzari
Support Opportunities: Scholarships in Brazil - Scientific Initiation