Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session Y12: Advances in Microscopy Techniques and Instrumentation
8:00 AM–9:48 AM,
Friday, March 8, 2024
Room: M100C
Sponsoring
Unit:
GIMS
Chair: Yulia Maximenko, Assistant Professor, Department of Physics, Colorado State University
Abstract: Y12.00008 : Very High Frequency Electrochemical Reflectance Spectroscopy for Bulk Analyte in Aqueous Solutions
9:24 AM–9:36 AM
Presenter:
Derek A Johnston
(Texas Tech University)
Authors:
Gordon Christopher
(Texas Tech University)
Dimitri Pappas
(Texas Tech University)
Derek A Johnston
(Texas Tech University)
Within its linear operating range, the experimental apparatus is capable of distinguishing bulk salt concentrations over 5 orders of magnitude, and distinguishing between different salts based on anion size, cation size, as well as valency. Observed changes in both magnitude and peak frequency of response were observed, making identifying of these various salts possible best on these measurements possible in the future. Additionally, the device was capable of measuring he concentration change in 5 nm sized Carbon dots and 10-micron latex particles. However, variations in the signals between these particles were difficult to elucidate. We believe with better design of testing cells to create larger linear measurement ranges, the system performance can be improved to better identify these targets.
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