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Construction of carbon electrodes in paper-based analytical devices using nanomaterials

Grant number: 12/04075-2
Support type:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): June 01, 2012
Effective date (End): November 30, 2012
Field of knowledge:Physical Sciences and Mathematics - Chemistry
Principal Investigator:Lauro Tatsuo Kubota
Grantee:Murilo Santhiago
Supervisor abroad: Charles Sherman Henry
Home Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Local de pesquisa : Colorado State University, United States  
Associated to the scholarship:10/00226-0 - Construction and application of analytical microdevices based on chromatographic paper with amperometric detection, BP.DR

Abstract

This research project aims the construction of carbon electrodes using nanomaterials for the electrochemical detection of parathion in samples of environmental interest.Porous materials such as paper are excellent substrates for the construction of low cost microfluidic devices. Hydrophobic walls will be constructed to control the transport of the solutions. These walls works as barriers to avoid sample spread on the paper as well as to define the path of samples and standard solutions. The path length will be evaluated in order to minimize the effect of possible interferences. In the detection system, the electrodes will be designed in the hydrophilic portion while the contact pads will be established in the hydrophobic part. After the design of the device, graphene or carbon nanotubes-based conductive inks will be used for the fabrication of the nanostructured electrodes.Hydrophilic microzones will be constructed to receive the enzyme acetyl cholinesterase and its substrate (acetyl thiocholine). The product of the enzymatic reaction (thiocholine) will be monitored by chronoamperometry. (AU)