Modulating the profile of nanoscopic water films with low level laser light

Water films are omnipresent in nature. They control unspecific interactions at biochip surfaces, functional coatings, and charge transfer processes in thunderclouds. Here we demonstrate how the profile of nanoscopic water films could be modulated by laser light and simultaneously visualized by near-field optical analysis. Most importantly, the intensity and the energy density of the modulating laser light were at low levels shown to increase the survival rate of stressed cells, in vitro and in vivo, and to accelerate the healing of wounds in low intensity laser activated biostimulation.