ArticleBiomedical optics express2020
Identifying different types of microorganisms with terahertz spectroscopy.
Article in Biomedical optics express, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed.
- Research Progress of Terahertz Technology in Microbiology.Biosensors · 2026Review
- A Ratiometric pH Sensor for Gram-Positive and Gram-Negative Bacteria.Journal of the American Chemical Society · 2026Article
- Article
- Metasurface-Assisted Terahertz Sensing.Sensors (Basel, Switzerland) · 2023Review
- Developing a Novel Terahertz Fabry-Perot Microcavity Biosensor by Incorporating Porous Film for Yeast Sensing.Sensors (Basel, Switzerland) · 2023Article
- Low-THz Vibrations of Biological Membranes.Membranes · 2023Article
- Terahertz virus-sized gold nanogap sensor.Nanophotonics (Berlin, Germany) · 2023Article
- Terahertz thermal curve analysis for label-free identification of pathogens.Nature communications · 2022Article
- THz-ATR Spectroscopy Integrated with Species Recognition Based on Multi-Classifier Voting for Automated Clinical Microbial Identification.Biosensors · 2022Article
- Moxa Wool in Different Purities and Different Growing Years Measured by Terahertz Spectroscopy.Plant phenomics (Washington, D.C.) · 2022Article
Corrections and comments
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Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Most microbial detection techniques require pretreatment, such as fluorescent labeling and cultivation processes. Here, we propose novel tools for classifying and identifying microorganisms such as molds, yeasts, and bacteria based on their intrinsic dielectric constants in the THz frequency range. We first measured the dielectric constant of films that consisted of a wide range of microbial species, and extracted the values for the individual microbes using the effective medium theory. The dielectric constant of the molds was 1.24-1.85, which was lower than that of bacteria ranging from 2.75-4.11. The yeasts exhibited particularly high dielectric constants reaching 5.63-5.97, which were even higher than that of water. These values were consistent with the results of low-density measurements in an aqueous environment using microfluidic metamaterials. In particular, a blue shift in the metamaterial resonance occurred for molds and bacteria, whereas the molds have higher contrast relative to bacteria in the aqueous environment. By contrast, the deposition of the yeasts induced a red shift because their dielectric constant was higher than that of water. Finally, we measured the dielectric constants of peptidoglycan and polysaccharides such as chitin,
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Registered trials
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