Senior Theses
Publication Date
5-24-2024
Document Type
Thesis (Open Access)
Degree Name
Bachelor of Science in Physics
Department
Physics
Faculty Advisor(s)
Michael Crosser
Subject Categories
Physics
Recommended Citation
Slifka, Jacob, "Optical Thickness Determination of Hexagonal Boron Nitride by Color" (2024). Senior Theses. 54.
https://digitalcommons.linfield.edu/physstud_theses/54
Comments
Hexagonal boron nitride (hBN) has shown great potential as a substrate or dielectric for graphene device applications. However, the common hBN production method of mechanical exfoliation leaves an array of hBN flakes of unknown thicknesses on a substrate that must be further investigated to pinpoint flakes of proper thickness for research. Quick identification by color vastly outperforms the speed of the AFM scans that are typically used to measure thickness of hBN, with the limitation of broader range estimates of these thicknesses. Through the interpretation of flake RGB color resulting from differences in optical contrast between hBN and the SiO! substrate on which the flakes are resting, relationships are identified to predict the thickness of hBN.