Effects of Substrate Pore Size on Stretchable Conductive Ink

Authors: Christine Ogundipe, Jessica Williams, Yanghyeon Kim

Advisor: Dr. Guna Selvaduray

Wearable technology is a rapidly growing field, fueled by the expanding market in health and fitness. Printed electronics have benefitted the wearable technology and medical industries by enabling the reduction of device sizes, and allowing the incorporation of flexibility into devices using materials of various pore sizes. The use of printed circuitry on flexible materials can result in inconsistent conductivity across similar devices. However, the way that conductivity of the circuit is affected in relation to substrate porosity is unknown. We will conduct an analysis of the absorption of a conductive silver ink by each printed substrate to determine the effect(s) that substrate pore size has on conductivity. The pore size will represent the absorbance of each material; the bigger the pore size, the more absorbent the material. This application is envisioned to have the ability to function in devices like a glucose monitor to convert a once invasive device into a discrete, non-invasive patch.