Reorientation of the H2O cage studied by terahertz time-domain spectroscopy
Reorientation of the H2O cage studied by terahertz time-domain spectroscopy
复制标题
太赫兹时域光谱研究 H2O 笼的重新定向
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
R. Alfano
中科院分区：
文献类型：
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作者：
B. L. Yu;Y. Yang;F. Zeng;X. Xin;R. Alfano
厚度为1.14 μm的液态H2O薄膜的太赫兹吸收光谱在1.56THz（1.53cm −1）处显示出清晰的吸收模式。这种模式归因于水笼中分子间氢键坐标的弯曲运动。采用双德拜介质模型，测量了慢τ1 ~<$9ps和快τ2 ~<$0.2ps（0.4-2.0THz）的介电弛豫时间，测量了1.56THz（1.53cm-1）的THz吸收谱。这种模式归因于水笼中分子间氢键坐标的弯曲运动。用双德拜介质模型计算了慢τ1 = 9 ps和快τ2 = 0.2ps（0.4-2.0THz）的介电弛豫时间。
The terahertz absorption spectrum of a thin film of liquid H2O of ∼14μm thickness showed a clear absorption mode at 1.56THz(∼53cm−1). This mode is attributed to the bending motion of the intermolecular hydrogen-bond coordinate in a water cage. The dielectric relaxation times of a slow τ1∼9ps and a fast τ2∼0.2ps component (0.4–2.0THz) were determined using a double Debye dielectric model.The terahertz absorption spectrum of a thin film of liquid H2O of ∼14μm thickness showed a clear absorption mode at 1.56THz(∼53cm−1). This mode is attributed to the bending motion of the intermolecular hydrogen-bond coordinate in a water cage. The dielectric relaxation times of a slow τ1∼9ps and a fast τ2∼0.2ps component (0.4–2.0THz) were determined using a double Debye dielectric model.