Detection of herbicides atrazine and prometryn via Raman amplified surface (SERS)

• Grant number: 14/00244-0
• Support Opportunities: Scholarships in Brazil - Master
• Start date: May 01, 2014
• End date: July 31, 2016
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Carlos José Leopoldo Constantino
• Grantee: Rafael Jesus Gonçalves Rubira
• Host Institution: Faculdade de Ciências e Tecnologia (FCT). Universidade Estadual Paulista (UNESP). Campus de Presidente Prudente. Presidente Prudente , SP, Brazil
• Associated scholarship(s): 14/16693-8 - Detection of atrazine and prometryn via surface-enhanced Raman scattering (SERS) using silver nanoparticles with different morphologies, BE.EP.MS

Abstract

In this master's project the detection of the herbicides atrazine and prometryn will be investigated using the surface-enhanced Raman scattering (SERS) technique. In this case, the herbicides will be dissolved at different concentrations in silver colloids (AgNPs: silver nanoparticles), being the development of sensors the broader goal of this project. The herbicides atrazine and prometryn belong to the class of s-triazines owing properties classified as toxic agents that may cause harm to humans. Alternatively, the detection of atrazine and prometryn will also be performed by impedance spectroscopy. In this case the sensing units, composed by Layer-by-Layer (LbL) films of lipid/AgNPs deposited onto interdigitated electrodes, are immersed in aqueous solutions containing different concentrations of prometryn or atrazine. SERS measurements will be also carried out directly from the sensing units after impedance measurements, thus allowing complementary analysis. The limits for drinking water associated with these pesticides are about 10-10 mol/L. Therefore, detection of such concentration is a challenge that requires the use of techniques of high sensitivity and selectivity, which is the case of SERS, besides impedance spectroscopy.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

RUBIRA, Rafael Jesus Gonçalves. Detection of herbicides atrazine and prometryn via Raman amplified surface (SERS). 2016. Master's Dissertation - Universidade Estadual Paulista (Unesp). Faculdade de Ciências. Bauru Bauru.