Effect of THz spectra of L-Arginine molecules by the combination of water molecules

Wang, Haiqing; Shi, Wei; Hou, Lei; Wang, Zhiquan; Wu, Meilin; Li, Chaofan; Li, Chunhui

doi:10.1016/j.isci.2022.103788

Cited by 6 publications

(4 citation statements)

References 21 publications

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“…At present, there are mainly several detection methods in the field of aqueous sample detection, such as sample cell, 2 , 3 , 4 attenuated total reflection technology (ATR), and microfluidic chip. 5 , 6 Among them, ATR, which is widely used in infrared spectrum research, is mainly used to overcome the problems that are difficult to be solved by transmission detection method.…”

Section: Introductionmentioning

confidence: 99%

Quantitative detection of THz-ATR spectra of aqueous samples under strong-field terahertz wave

Shi

Wang

et al. 2023

iScience

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Section: Introductionmentioning

confidence: 99%

Quantitative detection of THz-ATR spectra of aqueous samples under strong-field terahertz wave

Shi

Wang

et al. 2023

iScience

Self Cite

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“…Impurities [1][2][3], such as isomers [4][5][6] or water molecules [7,8], have always co-existed with organic substances [9], which cannot be excluded totally during the isolating and storing processes [10], resulting in an immense research challenge and material cost burden to scientists. Furthermore, some hydrophilic substances can be contaminated by trace water even during storage [11].…”

Section: Introductionmentioning

confidence: 99%

Water contaminant: Use it but do not shield it to synthesize co‐polymers with multiple emission colours

Yang,

Dong,

et al. 2023

Luminescence

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Due to the high affinity with water molecules, amide compounds are easily contaminated by moisture; therefore, the water interference effect cannot be totally excluded from the amide‐involved reactions. Thus, the perfect solution is to use the interference effect but not shield it in a real application. In this work, we introduced different contents of sodium acrylate (AAS) to scavenge water from the monomers of N‐isopropylacrylamide (NIPAm) when copolymerized with TPA‐Vinyl‐4CN. Herein, water molecules play a role as nucleophilic reagents to attack highly active functional groups as –C=C–CN from TPA‐Vinyl‐4CN, leading to a blue emissive TPA‐Vinyl‐2CHO. From this study, we made a deep awareness of the interactions between three reaction partners of AAS and NIPAm as well as TPA‐Vinyl‐4CN. Our results clearly demonstrated the fact that water can be perfectly used and controlled by the water absorbent of AAS, developing a new approach to synthesizing multiple emission‐coloured polymers by using only one luminogen of TPA‐Vinyl‐4CN.

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“…Terahertz time-domain spectroscopy (THz-TDS) is a comprehensive technology that can reveal structural information based on inter- or intramolecular vibrational modes while providing the benefits of low photon energy (about a few meV) and broad bandwidth, bridging the gap between microwave and infrared . THz-TDS has been employed to detect or identify substances at the molecular level including proteins, DNA, and organic molecules owing to its advantages of being nonionizing and label-free, as well as its high signal-to-noise ratio (SNR). Metamaterials (meta), artificial electromagnetic materials with periodic subwavelength structures, can considerably enhance the interaction between THz radiation and matter by exciting localized electromagnetic fields, thus overcoming the limitation due to the sensitivity of typical THz-TDS systems.…”

Section: Introductionmentioning

confidence: 99%

Sensitive and Specific Detection of Carcinoembryonic Antigens Using Toroidal Metamaterial Biosensors Integrated with Functionalized Gold Nanoparticles

Niu

Zhong

et al. 2022

Anal. Chem.

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Carcinoembryonic antigen (CEA) is a biomarker that is highly expressed in cancer patients. Label-free, highly sensitive, and specific detection of CEA biomarkers can therefore greatly aid in the early detection and screening of cancer. This study presents a toroidal metamaterial biosensor integrated with functionalized gold nanoparticles (AuNPs) that demonstrated highly sensitive and specific detection of CEA using terahertz (THz) time-domain spectroscopy. In the biosensor, a closed-loop magnetic field formed an electrical confinement, resulting in a high sensitivity (287.8 GHz/RIU) and an ultrahigh quality factor (15.04). In addition, the integrated AuNPs with high refractive indices significantly enhanced the sensing performance of the biosensor. To explore the quantitative and qualitative detection of CEA, CEA biomarkers with various concentrations and four types of proteins were measured by the designed biosensor, achieving a limit of detection of 0.17 ng and high specificity. Even more significant, the proposed AuNP-integrated THz toroidal metamaterial biosensor demonstrates exceptional potential for use in technologies for cancer diagnosis and monitoring.

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Effect of THz spectra of L-Arginine molecules by the combination of water molecules

Cited by 6 publications

References 21 publications

Quantitative detection of THz-ATR spectra of aqueous samples under strong-field terahertz wave

Quantitative detection of THz-ATR spectra of aqueous samples under strong-field terahertz wave

Water contaminant: Use it but do not shield it to synthesize co‐polymers with multiple emission colours

Sensitive and Specific Detection of Carcinoembryonic Antigens Using Toroidal Metamaterial Biosensors Integrated with Functionalized Gold Nanoparticles

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