Submission Date

7-21-2023

Document Type

Paper- Restricted to Campus Access

Department

Chemistry

Faculty Mentor

Mark Ellison

Student Contributor

Liana Davis

Comments

Presented during the 25th Annual Summer Fellows Symposium, July 21, 2023 at Ursinus College.

Project Description

The objective of this experiment was to investigate the transport of dopamine ions through single-walled carbon nanotubes (SWCNTs). During the experiment, voltages were applied to the dopamine solution to encourage movement through the nanotube while the current was monitored for pore blocking events. The pore-blocking events were analyzed to determine the average time the ions were traveling though the nanotube. From that data, the mobility, (µ) of the ions was determined using solutions with four different hydrogen ion concentrations, [H+]. The data collected for dopamine ion transport showed that the mobility was not dependent on the hydrogen ion concentration. This result differed from previous studies using choline chloride and sodium chloride at various pH levels which determined that as hydrogen ion concentration increased, the mobility increased. We hypothesize that this difference is due to the larger size of the dopamine ion compared to the previous ions tested.

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