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Novel micro-resonator design for electron paramagnetic resonance spectroscopy for volume-limited sample
Aregbesola, Ayodimeji Emmanuel
Aregbesola, Ayodimeji Emmanuel
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t24036s_Aregbesola.pdf
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2024-07
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Electron Paramagnetic Resonance (EPR) is a powerful tool for analyzing the detailed properties of electron spins in paramagnetic samples. The efficiency of an EPR spectrometer is largely determined by its resonator, which acts as the sensing element. The resonator’s ability to store, transmit, and receive microwave signals is characterized by its quality factor and fill factor. Optimization of the quality factor and fill factor is crucial for the detected signal by the resonator.
In this study, I simulated a novel resonator using Femtet Murata Software, one of the commercially available and cost-effective finite element analysis tools. This software provides comprehensive details about absorption spectra, as well as electric and magnetic field plots of simulated geometries.
Using this simulation tool, three different resonator structures were developed to be manufactured: First a resonator on a Quartz Wafer. This design achieved a quality factor (Q-factor) of 8949 and a sample volume of 0.0012 nL. Second a resonator on a PCB substrate. This design achieved a Q-factor of 3000 and also a sample volume of 0.0012 nL. Lastly a liquid sample resonator. This design was optimized to accommodate liquid samples, achieving a Q-factor of 1774 and a sample volume of 0.0006 nL.
These results demonstrate the potential of each resonator design for various applications in EPR spectroscopy, with significant implications for the analysis of both solid and liquid samples.
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Thesis (M.S.)-- Wichita State University, College of Liberal Arts and Sciences, Dept. of Mathematics, Statistics, and Physics
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Wichita State University
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