ArticleSensors (Basel, Switzerland)2023
Split-Ring Resonator Based Sensor for the Detection of Amino Acids in Liquids.
Article in Sensors (Basel, Switzerland), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 9 citations in OpenAlex.
- Beyond the 2D Plane: Interfacing Microwave Resonators with Bioreceptor-Functionalized Hydrogel Micropillars for Label-Free Enhanced Sensitivity Biosensing.ACS applied materials & interfaces · 2026Article
- Combined Dielectric Spectroscopy and Operando DRIFTS Analysis of Ba-Based NOSensors (Basel, Switzerland) · 2026Article
- Square Split-Ring Resonator as a Sensor for Detection of Nanoparticles in PVDF-Based Nanocomposites at Ultra-High Frequencies: MXenes and MoSSensors (Basel, Switzerland) · 2026Article
- Combined Use of Microwave Sensing Technologies and Artificial Intelligence for Biomedical Monitoring and Imaging.Biosensors · 2026Review
- Fabrication of mm-Scale Complementary Split Ring Resonators, for Potential Application as Water Pollution Sensors.Materials (Basel, Switzerland) · 2023Article
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Amino acids belong to the most important compounds for life. They are structural components of proteins and required for growth and maintenance of cells. Essential amino acids cannot be produced by the organism and must be ingested through the nutrition. Therefore, the detection of amino acids is of great interest when analyzing cell culture media and nutrition. In this work, we present a split-ring resonator as a simple but sensitive detector for amino acids. Split-ring resonators are RLC resonant circuits with a split capacitance and thus a resonance frequency that depends on the electromagnetic properties of a liquid sample at the split capacitance. Here, the split capacitance is an interdigital structure for highest sensitivity and covered with a fluidic channel for flow through experiments. First measurements with a vector network analyzer show detection limits in the range from 105 µM for glutamic acid to 1564 µM for isoleucine, depending on the electromagnetic properties of the tested amino acids. With an envelope detector for continuous recording of the resonance frequency, the split-ring resonator can be used in ion chromatography. At a flow rate of 0.5 mL/min, it reaches limits of detection of 485 µM for aspartic acid and 956 µM for lysine.
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