Rapid fabrication and piezoelectric tuning of micro- and nanopores in single crystal quartz

We outline the fabrication of piezoelectric through-pores in crystalline quartz using a rapid micromachining process, and demonstrate piezoelectric deformation of the pore. The single-step fabrication technique combines ultraviolet (UV) laser irradiation with a thin layer of absorbing liquid in cont...

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Bibliographic Details
Published in:Lab on a chip 2013-01, Vol.13 (1), p.156-160
Main Authors: Stava, Eric, Yu, Minrui, Shin, Hyun Cheol, Shin, Hyuncheol, Kreft, Dustin J, Blick, Robert H
Format: Article
Language:English
Subjects:
Chips
Craters
Lasers
Liquids
Nanostructure
Piezoelectricity
Porosity
Quartz
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Summary:We outline the fabrication of piezoelectric through-pores in crystalline quartz using a rapid micromachining process, and demonstrate piezoelectric deformation of the pore. The single-step fabrication technique combines ultraviolet (UV) laser irradiation with a thin layer of absorbing liquid in contact with the UV-transparent quartz chip. The effects of different liquid media are shown. We demonstrate that small exit pores, with diameters nearing the 193 nm laser wavelength and with a smooth periphery, can be achieved in 350 μm thick quartz wafers. Special crater features centring on the exit pores are also fabricated, and the depth of these craters are tuned. Moreover, by applying a voltage bias across the thickness of this piezoelectric wafer, we controllably contract and expand the pore diameter. We also provide a sample application of this device by piezoelectrically actuating alamethicin ion channels suspended over the deformable pore.
ISSN:1473-0197
1473-0189
DOI:10.1039/c2lc40925a