Faculty Sponsor(s)
Jennifer Heath
Location
Jereld R. Nicholson Library: Grand Avenue
Subject Area
Physics/Applied Physics
Description
Two-dimensional materials exhibit properties unlike anything else seen in conventional substances. Electrons in these materials are confined to move only in the plane. In order to explore the effects of these materials, we have built apparatus and refined procedures with which to create two-dimensional structures. Two-dimensional devices have been made using exfoliated graphene and placed on gold contacts. Their topography has been observed using Atomic Force Microscopy (AFM) confirming samples with monolayer, bilayer, and twisted bilayer structure. Relative work functions of each have been measured using Kelvin Probe Force Microscopy (KPFM) showing that twisted bilayer graphene has a surface potential 20mV higher than that of monolayer graphene and 35 mV below bilayer graphene.
Recommended Citation
Shannon, William; Heath, Jennifer; Greenlee, Byron D.; Murphy, Joseph; and Toledo-Urena, Joel, "Exploring the Electrical Properties of Twisted Bilayer Graphene" (2019). Linfield University Student Symposium: A Celebration of Scholarship and Creative Achievement. Event. Submission 69.
https://digitalcommons.linfield.edu/symposium/2019/all/69
Exploring the Electrical Properties of Twisted Bilayer Graphene
Jereld R. Nicholson Library: Grand Avenue
Two-dimensional materials exhibit properties unlike anything else seen in conventional substances. Electrons in these materials are confined to move only in the plane. In order to explore the effects of these materials, we have built apparatus and refined procedures with which to create two-dimensional structures. Two-dimensional devices have been made using exfoliated graphene and placed on gold contacts. Their topography has been observed using Atomic Force Microscopy (AFM) confirming samples with monolayer, bilayer, and twisted bilayer structure. Relative work functions of each have been measured using Kelvin Probe Force Microscopy (KPFM) showing that twisted bilayer graphene has a surface potential 20mV higher than that of monolayer graphene and 35 mV below bilayer graphene.
