Implementation of microfluidic devices at a transparency

Abstract

We have developed a scanning laser manufacturing technique to produce microfluidic structures directly on photocopy transparency films. The reasons for the selection of transparency include (i) its insignificant water diffusion and vapor loss characteristics, (ii) its reduced viscoelastic behavior and (iii) its very low cost. The stiffness of the transparency membrane can be carefully tailored by adjusting laser ablation power. To show the feasibility of the approach, we have fabricated membrane valves on the transparency, and demonstrated a peristaltic micro-pumping system. Our investigation offers the potential for developing new types of very low-cost disposable devices including flexible microfluidic systems.