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An electromagnetically-actuated polymer micro-pen for picoliter biological assay patterning

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4 Author(s)
Maesoon Im ; Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea ; Il-Joo Cho ; Kwang-Seok Yun ; Euisik Yoon

This paper reports a polymer micro-pen with an integrated microchannel and a sample reservoir, which can be actuated by Lorentz force induced on an integrated metal actuator for biological assay patterning. The length, width and thickness of the micro-pen are 500μm, 120μm and 6μm, respectively. The fabricated micro-pen is successfully deflected by electromagnetic force from external permanent magnets which generates a magnetic field of 0.2T. Spring constant of the micro-pen is analytically estimated as 1.9N/m and the measured resonance frequency is about 7.3 kHz. The microchannel formed on this polymer micro-pen is 15μm wide and the sample reservoir is 500μm thick in the area of 300μm×300μm. Red ink is pulled up to the end point of the microchannel from the reservoir by capillary force. A red-ink-dot in diameter of 11 μm has been placed on paper by the fabricated micro-pen. This demonstrates a sub-picoliter patterning of biological assay is possible.

Published in:

Solid-State Sensors, Actuators and Microsystems, 2005. Digest of Technical Papers. TRANSDUCERS '05. The 13th International Conference on  (Volume:2 )

Date of Conference:

5-9 June 2005