Terahertz spectral nondestructive detection of amino acid molecules in aqueous solution

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

“…However, these methods are not used widely because of their relatively poor operability, integration limitations, and high cost. Recently, our team designed a horn-shaped tapered parallel plate waveguide (HSTPPW), which can enhance the electrical field of the incident THz wave at its central position ( Hou et al., 2021 ; Shi et al., 2021 ). Based on HSTPPW, the THz spectral information of substances in an aqueous solution can be obtained by the THz time-domain spectroscopy (THz-TDS) system with high accuracy, although the method is expensive and it is a little difficult to control the thickness of the sample dropped into the waveguide.…”

Terahertz spectroscopic detection of amino acid molecules under magnetic field

“…Most biomolecules can only maintain biological activity in a liquid environment [ 8 ],so detecting liquid biomolecules is critical. Studies have shown that the use of derivatization methods allows real-time monitoring of changes in the plasma amino acid profile of patients with malignant hematological diseases.…”