Author/Authors :
Cringus، نويسنده , , Dan and Lindner، نويسنده , , Jِrg and Milder، نويسنده , , Maaike T.W. and Pshenichnikov، نويسنده , , Maxim S. and Vِhringer، نويسنده , , Peter and Wiersma، نويسنده , , Douwe A. Wiersma، نويسنده ,
Abstract :
Vibrational energy relaxation and ultrafast thermalization following impulsive excitation of the OH-stretching band of water nanodroplets confined to reverse micelles is studied by infrared pump–probe spectroscopy with sub-100 fs time resolution. The self-consistent analysis of experimental data for micelles diameters ranging from 1 to 10 nm as well as for bulk water reveals distinctly different vibrational lifetimes for the water molecules in the bulk-like core (270 fs) and in the surfactant vicinity (800 fs), which is a direct proof of a strongly disturbed hydrogen-bond network.
