Detection of Low-Concentration Biological Samples Based on a QBIC Terahertz Metamaterial Sensor Article Swipe
Bing Dong
,
Bo Wei
,
Dongshan Wei
,
Zhilin Ke
,
Dongxiong Ling
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.3390/s24113649
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.3390/s24113649
Quasi-bound state in the continuum (QBIC) can effectively enhance the interaction of terahertz (THz) wave with matter due to the tunable high-Q property, which has a strong potential application in the detection of low-concentration biological samples in the THz band. In this paper, a novel THz metamaterial sensor with a double-chain-separated resonant cavity structure based on QBIC is designed and fabricated. The process of excitation of the QBIC mode is verified and the structural parameters are optimized after considering the ohmic loss by simulations. The simulated refractive index sensitivity of the sensor is up to 544 GHz/RIU, much higher than those of recently reported THz metamaterial sensors. The sensitivity of the proposed metamaterial sensor is confirmed in an experiment by detecting low-concentration lithium citrate (LC) and bovine serum albumin (BSA) solutions. The limits of detection (LoDs) are obtained to be 0.0025 mg/mL (12 μM) for LC and 0.03125 mg/mL (0.47 μM) for BSA, respectively, both of which excel over most of the reported results in previous studies. These results indicate that the proposed THz metamaterial sensor has excellent sensing performances and can well be applied to the detection of low-concentration biological samples.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3390/s24113649
- https://www.mdpi.com/1424-8220/24/11/3649/pdf?version=1717515270
- OA Status
- gold
- Cited By
- 2
- References
- 49
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4399358146
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- OpenAlex ID
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https://openalex.org/W4399358146Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.3390/s24113649Digital Object Identifier
- Title
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Detection of Low-Concentration Biological Samples Based on a QBIC Terahertz Metamaterial SensorWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2024Year of publication
- Publication date
-
2024-06-04Full publication date if available
- Authors
-
Bing Dong, Bo Wei, Dongshan Wei, Zhilin Ke, Dongxiong LingList of authors in order
- Landing page
-
https://doi.org/10.3390/s24113649Publisher landing page
- PDF URL
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https://www.mdpi.com/1424-8220/24/11/3649/pdf?version=1717515270Direct link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
-
goldOpen access status per OpenAlex
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https://www.mdpi.com/1424-8220/24/11/3649/pdf?version=1717515270Direct OA link when available
- Concepts
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Terahertz radiation, Metamaterial, Materials science, Ohmic contact, Sensitivity (control systems), Refractive index, Optoelectronics, Metamaterial absorber, Excitation, Tunable metamaterials, Nanotechnology, Electronic engineering, Physics, Layer (electronics), Engineering, Quantum mechanicsTop concepts (fields/topics) attached by OpenAlex
- Cited by
-
2Total citation count in OpenAlex
- Citations by year (recent)
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2025: 2Per-year citation counts (last 5 years)
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49Number of works referenced by this work
- Related works (count)
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10Other works algorithmically related by OpenAlex
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