Described are an apparatus and method of moving micro-droplets. A surface has a liquid phase thereon. In the liquid phase is a droplet. Focused at an edge of the droplet is a beam of light. The light beam produces a thermal gradient sufficient to induce the droplet to move according to the Marangoni...http://www.google.com/patents/US7582858?utm_source=gb-gplus-sharePatent US7582858 - Apparatus and method of moving micro-droplets using laser-induced thermal gradients
