American scientists have demonstrated a new way of distilling alcohol & ndash; by light. It requires less energy than distillation.
Naomi Halas and her colleagues at the University of Rice was added to a mixture of water and ethyl alcohol nanoparticles of gold and silicon oxide, after which the suspension was sent to the top of the laser beam. When light falls on a nanoparticle, it absorbs photons simultaneously (and heated) and scatters them — neighboring nanoparticles absorb photons that raises and their temperature. As a result, light « caught » solution at the surface, causing the heating and pushing the most volatile component of the mixture (ethyl alcohol).