Research on specific identification method of substances through terahertz metamaterial sensors

Zhao, Rui; Ye, Yunxia; Dai, Zijie; Mu, Tonglin; Ren, Xudong

doi:10.1016/j.rinp.2022.106055

Cited by 9 publications

(2 citation statements)

References 20 publications

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“…However, until now, the experiments on metasurface sensors based on two resonance modes in the terahertz range have remained in the stages of sensing tests with different proportions of mixed solutions and testing on the dried samples after spraying or incubating samples [26][27][28][29][30][31][32]. The main reason is that the strong polarity of aqueous solutions signi cantly inhibits terahertz waves, and the absorption characteristics of solutes are also severely inhibited.…”

Section: Introductionmentioning

confidence: 99%

Terahertz sensing of L-Valine and L- Phenylalanine solutions

Shu,

Zhou,

Hao

et al. 2024

Preprint

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An asymmetric folded double-open ring of metasurface sensor based on the Fano resonance has been designed, with its resonant frequency matching the absorption peak of L-Valine at 1.7 THz. A mixture of water and glycerol in a volume ratio of 2:8 was proposed as a solvent to reduce the absorption of terahertz waves by water. A sample chamber with a controlled liquid thickness of (15 μm) was fabricated. A vertical incidence of terahertz time-domain spectrometer (THz-TDS) was constructed to allow solutions to be placed horizontally, and two different concentrations of amino acid solutions were subsequently measured. As the concentration of L-Valine solution varied from 0 to 20mM, the resonance peak of sensor shifted from 1.39 THz to 1.58 THz, demonstrating a concentration sensitivity of 9.98GHz/mM. The resonance peak shift in the L-Phenylalanine solution was not pronounced. It is speculated that the coupling enhancement between the solute absorption peak and the sensor resonance peak in the solution leads to an increased frequency shift, highlighting the distinctive sensing detection.

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Section: Introductionmentioning

confidence: 99%

Terahertz sensing of L-Valine and L- Phenylalanine solutions

Shu,

Zhou,

Hao

et al. 2024

Preprint

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“…This is primarily due to the strong polarity of water solutions, which severely inhibits terahertz waves, and the absorption characteristics of solutes are also severely inhibited, which puts forward the requirement that the tested materials are supposed to be thin enough or even dehydrated. Moreover, recent works often focus on pursuing the sensing performance of the sensor itself, as well as requiring consideration of the differentiation and identification of different substances in sensing experiments [ 32 , 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Terahertz Sensing of L-Valine and L-Phenylalanine Solutions

Shu,

Zhou,

Hao

et al. 2024

Sensors

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To detect and differentiate two essential amino acids (L-Valine and L-Phenylalanine) in the human body, a novel asymmetrically folded dual-aperture metal ring terahertz metasurface sensor was designed. A solvent mixture of water and glycerol with a volume ratio of 2:8 was proposed to reduce the absorption of terahertz waves by reducing the water content. A sample chamber with a controlled liquid thickness of 15 μm was fabricated. And a terahertz time-domain spectroscopy (THz-TDS) system, which is capable of horizontally positioning the samples, was assembled. The results of the sensing test revealed that as the concentration of valine solution varied from 0 to 20 mmol/L, the sensing resonance peak shifted from 1.39 THz to 1.58 THz with a concentration sensitivity of 9.98 GHz/mmol∗L−1. The resonance peak shift phenomenon in phenylalanine solution was less apparent. It is assumed that the coupling enhancement between the absorption peak position of solutes in the solution and the sensing peak position amplified the terahertz localized electric field resonance, which resulted in the increase in frequency shift. Therefore, it could be shown that the sensor has capabilities in performing the marker sensing detection of L-Valine.

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Antibody-modified integrated microfluidic terahertz biosensor for detection of breast cancer biomarkers

Liu

2024

Optoelectron. Lett.

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Research on specific identification method of substances through terahertz metamaterial sensors

Cited by 9 publications

References 20 publications

Terahertz sensing of L-Valine and L- Phenylalanine solutions

Terahertz sensing of L-Valine and L- Phenylalanine solutions

Terahertz Sensing of L-Valine and L-Phenylalanine Solutions

Antibody-modified integrated microfluidic terahertz biosensor for detection of breast cancer biomarkers

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