论文标题
在中红外脉冲照射下冷热冷界水的异常
Heating anomaly of cold interfacial water under irradiation of mid-infrared pulses
论文作者
论文摘要
使用非平衡分子动力学模拟研究了具有不同初始温度的界面水的中红外加热。发现在3360-3380 $ cm^{ - 1} $的脉冲照射下，在较低初始温度下，在亲水表面上的二维水单层可获得更大的温度跳跃。这种违反直觉现象下方的机制是由于水分子在较低初始温度下的特定方向构型而导致不对称OH拉伸振动的过渡效率提高。对异常现象的理解阐明了水分子对温度的界面特性的敏感性。
The mid-infrared heating of interfacial water with different initial temperatures is studied using non-equilibrium molecular dynamics simulation. It is found that under the irradiation of a pulse at 3360-3380 $cm^{-1}$ the two-dimensional water monolayer on a hydrophilic surface at a lower initial temperature acquires a much larger temperature jump. The mechanism beneath this counterintuitive phenomenon is the enhanced transition efficiency of the asymmetric OH stretching vibration due to the specific oriented configuration of water molecules at lower initial temperatures. The understanding of the anomalous phenomenon clarifies the sensitivity of the interfacial properties of water molecules to the temperature.
