Microfluidic device fabrication with serigraphy technique

Abstract

This article provides the design and fabrication details of a new technique to build a microfluidic device with two parallel substrates and a silicone gasket. The fabrication process uses screen printing technology offering fast and low-cost microdevices without the need for high-cost fabrication equipment and special photoresist processes. Hermetic microfluidic channels of 300 mm width and 50 mm height having parallel facing electrodes on two substrates are made with simple serigraphy technique using silicone rubber. The fabricated devices were experimentally tested for detection and characterization of polystyrene particles and living cells by negative and positive dielectrophoresis. The reported technique enables simple manipulation, centering, detection and characterization of living cells at low and high frequencies.

Rapid CO2 laser processing technique for fabrication of micro-optics and micro-structures on fused silica materials

“…Micro-optics and micro-structures are widely used in optical communication, micro-opto-electro-mechanical systems, lab-on-a-chip devices sensor applications and other fields. 1–3 Also, there are many kinds of micro-optics and micro-structures, such as microfluidic channels, 4–6 micro-lens arrays, 1,7,8 optical fiber, 9,10 diffractive optics, 11 holographic structures 12 and laser-induced periodic surface structures (LIPSSs). 13 Compared with micro-optics and micro-structures made of polymers, those micro-optics and micro-structures made of glass have been widely and reliably used in harsh environments due to their stable thermal, chemical and physical properties.…”