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 - Analytical Chemistry
• Principal researcher: 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
• Research place: 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)