This review introduces the THz spectral imaging technique for moisture detection, the Debye relaxation model, and other related theories, reviews the research progress of the terahertz wave detection of water, and finally discusses the challenges faced by the terahertz wave detection of water and gives a positive outlook, which provides ...

2020年8月4日 · Here, we use an intense and ultrabroadband THz pulse (peak electric field strength of 14.9 MV/cm, centre frequency of 3.9 THz, and bandwidth of 1–10 THz) to resonantly excite intermolecular...

THz water, derived from natural minerals, escalates solvation and biological activity via resonating water molecules. Its bactericidal version exploits alkalinity and electrical properties to dissolve microbial cell membranes.

2023年6月30日 · The frequency range of terahertz waves (THz waves) is between 0.1 and 10 THz and they have properties such as low energy, penetration, transients, and spectral fingerprints, which are especially sensitive to water. Terahertz, as a frontier technology, have great potential in interpreting the structure of water molecules and detecting biological ...

Here we performed open aperture z-scan transmission experiments on static liquid cells, and detect the THz fields with electro-optical techniques. We show that it is possible to quantify the nonlinear response of liquid water at ~1 THz even when large signals originate from the sample holder windows.

采用分子动力学模拟方法, 本文研究了不同水模型在常温常压下的太赫兹吸收谱, 并且进一步基于温度研究了水的太赫兹吸收谱对氢键网络强弱的依赖性, 发现温度的升高会使氢键网络的太赫兹吸收谱发生红移, 这表明氢键网络的太赫兹吸收谱的中心频率与氢键相互作用的强弱具有强关联, 更进一步的研究表明水中氢键网络的氢键寿命与氢键网络振动的吸收峰的中心频率之间存在线性关系. 这一现象背后的物理能够通过将氢键网络中的氢键类比为弹簧借助弹簧振子模型加以描述. 本文 …

THz spectroscopy was used to probe changes that occur in the dynamics of the hydrogen bond network upon solvation of alcohol chains. The THz spectra can be decomposed into the spectrum of bulk water, tetrahedral hydration water, and more disordered (or interstitial) hydration water.

In order to address this problem, we need intense THz radiation able to drive the liquid into the nonlinear response regime. Firstly, in this study, we summarize the available brilliant THz sources and compare their emission properties.

5 天之前 · In recent decades, researchers have intended to employ terahertz time-domain spectroscopy (THz-TDS) in the field of cancer detection, leveraging the high water content in cancerous tissues as a potential marker for malignant tumors.

5 天之前 · Owing to its broadband nature, unique spectral fingerprint, safety, and penetration capabilities, terahertz (THz) waveband (0.1 to 10 THz) holds promise for diverse applications, including biomedical effects [1,2], nondestructive testing [3,4], communications [], and aerospace technologies [6,7].Despite extensive research being conducted on various strategies for room-temperature (RT) THz ...