07/07/2021
By Matthew Gage

The Kennedy College of Science, Department of Chemistry, invites you to attend a doctoral dissertation defense by W.P.M. Dhanushka Wickramasinghe entitled “Electrochemical effects of depositing iridium oxide nanoparticles onto conductive flexible substrates.” The defense will be held on July 26 at 1 p.m. by Zoom. Please contact Dr. Gage for meeting information if you are interested in attending. The committee will be composed of Kwok-Fan Chow (chair), David K. Ryan, Long Chiang, and Michael Ross. A brief abstract is provided below.

Abstract: This talk highlights electrochemical effects of depositing iridium oxide nanoparticles (IrOx NP) onto conductive flexible substrates. Two main topics will be discussed in this presentation. The first topic covers the electrochemical energy storage capability of IrOx NP deposited woven and nonwoven conductive fabric materials. The specific capacitance values of the resultant fabric materials increased over 150 percent. The NPs bind strongly to the materials and are electrochemically stable for over 1000 charge-discharge cycles. The second topic covers the permselectivity properties of IrOx NP deposited carbon nanotube (CNT) membrane under different applied potentials. When IrOx NPs are in their 3+ oxidation state, small metal ions (i.e. Li+, Na+, and K+) can pass through an IrOx NP deposited CNT membrane. However, when the IrOx NPs are in their 4+ oxidation state, the same metal ions cannot pass through the membrane. The permselectivity of an IrOx deposited CNT membrane can be modulated by applying an electrochemical potential to the membrane.

All interested students and faculty members are invited to attend.