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Electrode microchamber for noninvasive perturbation of mammalian cells with nanosecond pulsed electric fields

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5 Author(s)
Yinghua Sun ; Mater. Sci. Dept., Univ. of Southern California, Los Angeles, CA, USA ; Vernier, P.T. ; Behrend, M. ; Marcu, Laura
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Nanosecond pulsed electric fields can pass through the external membrane of biological cells and disturb fast-responding intracellular structures and processes. To enable real-time imaging and investigation of these phenomena, a microchamber with integral electrodes and optical path for observing individual cells exposed to ultrashort electric pulses was designed and fabricated utilizing photolithographic and microelectronic methods. SU-8 photoresist was patterned to form straight sidewalls from 10 to 30 μm in height, with gold film deposited on the top and sidewalls for conductive, nonreactive electrodes and a uniform electric field. Channel dimensions (10-30 μm×100 μm×12000 μm) are suitable for observations of mammalian cells during nanosecond, megavolt-per-meter pulsed electric field exposure. Experimental studies utilizing the electrode microchamber include live-cell imaging of nanoelectropulse-induced intracellular calcium bursts and membrane phospholipid translocation.

Published in:

NanoBioscience, IEEE Transactions on  (Volume:4 ,  Issue: 4 )

Date of Publication:

Dec. 2005

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