Microcontact printing technique

FIGURE 35. A schematic illustration of microcontact printing technique. Reprinted with permission from Reference 508. Copyright (1995) American Chemical Society... 

We are combining the selective deposition of polypyrrole and polyaniline on hydrophilic/hydrophobic surfaces as described in the preceeding section with the recent microcontact printing technique (18-20) to produce patterned conducting polymer films which we have demonstrated can be used in PDLC display-type devices. 

Geometrical lab chips with micropattemed surfaces are used to geometrically control the cell attachment to the matrix materials, which provide opportunities to explore the fundamental effect of geometrical-driven ceU morphology changes to stem cell differentiation. Microcontact printing techniques are widely used to pattern the shapes of individual cells on a substrate (Fig. 1). Briefly, the procedure involves the transfer of extracellular matrix proteins from the microfabricated polydimethylsiloxane (PDMS) stamp with micropattems onto the substrate. The nonpattemed... 

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