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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.)

Layer-by-Layer Films of Graphene Nanoplatelets and Gold Nanoparticles for Methyl Parathion Sensing

Full text
Author(s):
Rodrigues, Gustavo H. S. [1] ; Miyazaki, Celina M. [1] ; Rubira, Rafael J. G. [2] ; Constantino, Carlos J. L. [2] ; Ferreira, Marystela [1]
Total Authors: 5
Affiliation:
[1] Univ Fed Sao Carlos, CCTS, BR-18052780 Sao Paulo - Brazil
[2] Univ Estadual Paulista, BR-19060900 Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: ACS APPLIED NANO MATERIALS; v. 2, n. 2, p. 1082-1091, FEB 2019.
Web of Science Citations: 2
Abstract

The wide use of pesticides in agriculture makes necessary the development of cost-effective, easy, and rapid methods aiming for environmental and health protection. We propose the fabrication and investigation of layer-by-layer (LbL) films composed of reduced graphene oxide stabilized in polyelectrolytes in the presence and absence of gold nanoparticles (AuNPs) toward methyl parathion (MP) detection. In addition to the film assembly and sensing application, we performed a systematic investigation of the influence of MP distribution on the limit of detection and linear range of the sensor. Indium tin oxide (ITO) electrodes modified with the LbL films were applied by differential pulse voltammetry achieving an LOD and a linear range of 0.226 ppm and 0.25-40 ppm in the absence of AuNPs, while in the their presence, a wider linear range was achieved (0.5-60 ppm, with LOD of 0.770 ppm). Real sample analysis indicated potential application in water, ground, and vegetables, with recovery varying from 92% to 113%. (AU)

FAPESP's process: 14/15093-7 - Study of nanostructured systems by surface plasmon resonance (SPR): applications in biosensing
Grantee:Celina Massumi Miyazaki
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 16/09634-0 - Interaction between biomembrane models based on Langmuir films and giant unilamellar vesicles (GUVs) with triazine herbicides and detection via SERS spectroscopy.
Grantee:Rafael Jesus Gonçalves Rubira
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 16/19387-0 - LbL (LAYER-BY-LAYER) and Langmuir-Blodgett (LB) nanostructured films with emodin for systems carriers.
Grantee:Marystela Ferreira
Support Opportunities: Regular Research Grants
FAPESP's process: 17/03523-5 - Electrochemical sensor based on graphene oxide reduced and functionalized with gold nanoparticles for the detection of methyl parathion
Grantee:Gustavo Henrique Sousa Rodrigues
Support Opportunities: Scholarships in Brazil - Scientific Initiation