Title :
Wirelessly actuated microvalve system using induction heating and its thermal effect on the microfluidic system
Author :
Seung-Ki Baek ; Yoon, Yong-Kyu YK ; Park, Jung-Hwan
Author_Institution :
Electr. Eng., Kyungwon Univ., Seongnam, South Korea
Abstract :
A wirelessly heated paraffin based disposable microvalve system has been implemented in a microfluidic system. Paraffin changes its phase from solid to liquid by inductively heated adjacent heating elements, turning on the valve. Copper and nickel discs with a diameter of 2.5mm and various thicknesses of 50μm, 100μm, and 200μm have been used as heating elements. A high frequency induction heating system (300kHz ~ 400kHz) has been used for the valve actuation, where the copper disc with a thickness of 50μm shows most effective heating performance. The compliance of the thermally actuated valve with the enzymatic activity has been studied. No significant thermal degradation of the enzyme due to the generated heat by induction heating has been observed.
Keywords :
induction heating; microfluidics; microvalves; copper discs; enzymatic activity; frequency 300 kHz to 400 kHz; high frequency heating system; microfluidic system; nickel discs; paraffin; size 100 mum; size 2.5 mm; size 200 mum; size 50 mum; thermal effect; valve actuation; wirelessly actuated microvalve system; Copper; Degradation; Electromagnetic heating; Nickel; Wireless communication; Induction heating; disposable microvalve system; enzymatic activity; paraffin valve; thermal degradation;
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems Conference (TRANSDUCERS), 2011 16th International
Conference_Location :
Beijing
Print_ISBN :
978-1-4577-0157-3
DOI :
10.1109/TRANSDUCERS.2011.5969443
