标题： 二元流体相分离的纳秒动力学研究，结合激光诱导温度跳跃和福斯特共振能量转移探测 显示英文标题

标题： Nanosecond kinetics of phase separation in binary fluid studied by a combination of Laser-induced temperature jump and Forster Resonant Excitation Transfer probing

摘要： 一种用于在纳秒时间分辨率和纳米空间分辨率下研究二元流体相分离的新技术得到了展示。 通过结合激光诱导温度跳跃和福斯特共振能量转移技术，研究了水/2,6- lutidine混合物相分离初始阶段的纳秒动力学。 一对发色团： 8-羟基-1,3,6-芘三磺酸盐（HPTS）和香豆素480在混合物的均匀相中形成FRET对，并在非均匀相中分离成混合物的组分。 将混合物带入非均匀相的温度跳跃是通过中红外激光脉冲实现的。 相分离的指数增长阶段在5到20纳秒范围内。 所展示的技术可以应用于广泛的化学和生物系统。 显示英文摘要

摘要： A novel technique for studying the demixing of binary fluids with nanosecond time resolution at nanometer spatial resolution is demonstrated. Nanosecond kinetics of phase separation initial stages in the water/2,6-lutidine mixture studied through the combination of a laser-induced temperature jump, and Forster Resonant Excitation Transfer techniques. A pair of chromophores: 8-hydroxy-1,3,6-pyrenetrisulfonate (HPTS) and Coumarin 480 form a FRET pair in the uniform phase of the mixture and separate into the components of the mixture in the nonuniform phase. The temperature jump that brings the mixture into a nonuniform phase is performed by the mid-infrared laser pulse. The exponential growth stage of phase separation is in the 5 to 20 nanoseconds range. The demonstrated technique can be applied to a broad range of chemical and biological systems.