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摘要
A new microreactor with surface acoustic wave (SAW) heating system was presented. The microreactor is comprised of surface acoustic wave heating source, a PDMS micro-vessel and a metal micro-vessel. An interdigital transducer (IDT) and a reflector were fabricated on a 1280 degrees yx-LiNbO3 piezoelectric substrate by microelectric technology. A RF signal with 27.5 MHz frequency was applied to the IDT to generate surface acoustic wave. When hitting a glycerin microfluid in the PDMS micro-vessel on the piezoelectric substrate, SAW radiated into the glycerin microfluid and heated it. Then, the temperature of the reactants in the metal micro-vessel was raised by heating transfer. The experiments of melting solid paraffin and color development reaction have been examined using the microreactor. The results show that the temperature of the reactants in the metal micro-vessel can be raised at least 42 degrees C, which is enough for lots of biochemical reactions. The results also show that the microreactor can greatly improve the reaction velocity of color development reaction due to SAW radiation. This work is valuable for biochemical analysis on microfluidic device.
- 出版日期2012
- 单位宁波大学
