Week 4 – Sharon Obaisi

This week I was given the task of performing three cyclic voltammetry measurements using three different CNT threads; the purpose of repetition is to obtain consistent results. What I thought was going to be a smooth process actually presented with a lot of challenges. While the basic measurements went well, the process of trying to achieve a redox peak in my reading proved difficult. I suppose I will have to do some research on the results I obtained to understand why they are occurring and how I can achieve my desired results. Today, I got so far as collecting results on the first sample; my plan for tomorrow is to test out the polymer coated CNT to determine if I can obtain a redox peak in my measurement.

After performing the reading with PEDOT:PSS coated CNT, I have come to the conclusion that carbon nanotubes are not the most efficient materials for electrodes. While their synthesis offers many incentives, their inability to perform redox reactions limits their application. Regardless, the process of learning about electrochemistry has been fascinating, and it has prepared me for the classes I am yet to take.

While I have not finished collecting data on my Cyclic Voltammetry (CV) readings, I am to move onto learning how to collect data from OECTs, which is one of my second mentor’s projects.

A CV reading of a PEDOT:PSS coated CNT thread showing the slight reduction and oxidation peaks.
My 3-electrode setup using Ag/AgCl, CNT, and platinum wire.