Data Trends in Solution-Gated Monolayer Graphene Field-Effect Transistors
Open Access
Author:
Robbins, Jackson
Graduate Program:
Engineering Science and Mechanics
Degree:
Master of Science
Document Type:
Master Thesis
Date of Defense:
June 22, 2022
Committee Members:
Albert Segall, Program Head/Chair Saptarshi Das, Thesis Advisor/Co-Advisor Mark William Horn, Committee Member Sahin K Ozdemir, Committee Member
Keywords:
Graphene FET Salinity Sensor Electrolyte Gating
Abstract:
The ability to detect the concentration of salt is crucial for the study of Earth’s
oceans and monitoring the marine environment. Furthermore, biological activity
can be monitored through salinity in surrounding fluid, which changes as cellular
activity occurs. Salt solutions at varying concentrations were used for solution
gating in monolayer graphene field-effect transistors (FET’s). These devices were
fabricated from CVD-grown graphene film which was transferred to a 285-nm silicon
dioxide/p++-silicon substrate. The goal of this analysis is to develop a machine
learning approach that can utilize these trends to determine the concentration
and type of salt used to gate a device. The device itself is envisioned either as
a flexible and implantable biosensor for health monitoring, or as a platform for
sample analysis by field researchers studying ocean environments.
