Fig. 1 (a) Snapshot of the arrangement of water molecules in the liquid (IMAGE)
Caption
(red: oxygen atoms, grey; hydrogen atoms). The dotted lines indicate hydrogen bonds between the molecules. Each water molecule possesses an electric dipole moment d which generates an electric field in its environment. The molecular arrangement fluctuates in the femtosecond time domain. (b) Fluctuating electric field of the liquid. The blue line shows the momentary electric field acting on the molecular orbital 3a1 (inset) as a function of time (in femtoseconds). The strongest peaks induce the process of tunnel ionization by which an electron e- can leave the orbital.
Credit
MBI
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