Microfluidic elastomer composites with switchable vis-IR transmittance†
Abstract
We demonstrate a class of simple and versatile soft microfluidic materials that can be made optically transparent or coloured on demand. These materials are in the form of flexible sheets containing microchannel networks embedded in polydimethylsiloxane (PDMS). The channels are filled with liquids whose refractive index is matched with the one of the PDMS matrix. By pumping