Date of Graduation
5-2023
Document Type
Thesis
Degree Name
Bachelor of Science in Chemistry
Degree Level
Undergraduate
Department
Chemistry & Biochemistry
Advisor/Mentor
He, Maggie
Committee Member/Reader
Heyes, Colin
Committee Member/Second Reader
Nakamura, Hiro
Committee Member/Third Reader
Wheeler, Jill
Abstract
This paper presents the development of a nitrogen dioxide (NO2) sensor that utilizes the phenomenon of graphene-enhanced Raman scattering (GERS). The sensor consists of monolayer graphene on a silicon wafer, functionalized noncovalently with Copper(II) 2,9,16,23-tetra-tert-butyl-29H,31H-phthalocyanine (CuTTPc) via the solution soaking method. A custom sensing chamber was constructed to enable Raman spectra to be collected during NO2 exposure. The response of the sensor was found to be linear between 10 and 100 ppm NO2, indicating that it could be used for both detection and quantification. Furthermore, the sensor was shown to be reusable after exposure to 10 ppm NO2. These results demonstrate the potential of GERS-based NO2 sensors for practical applications in environmental monitoring and safety management.
Keywords
graphene-enhanced Raman scattering, nitrogen dioxide sensor, Copper(II)tetra-tert-butyl-phthalocyanine, copper phthalocyanine, graphene, Raman spectroscopy
Citation
Hazeslip, S. (2023). Detection of Nitrogen Dioxide via Graphene-Enhanced Raman Scattering. Chemistry & Biochemistry Undergraduate Honors Theses Retrieved from https://scholarworks.uark.edu/chbcuht/45
Included in
Analytical Chemistry Commons, Environmental Monitoring Commons, Materials Chemistry Commons, Physical Chemistry Commons