Using microcontact printing (μCP) and micromolding techniques, we have prepared micropatterns of carbon nanotubes aligned in a direction normal to the substrate surface. While the μCP process involves the regionspecific transfer of self-assembling monolayers (S AMs) of alkylsiloxane onto a quartz substrate and subsequent adsorption of polymer chains in the SAM-free regions, the micromolding method allows the formation of polymer patterns through solvent evaporation from a precoated thin layer of polymer solution confined between a quartz plate and a poly(dimethylsiloxane) (PDMS) elastomer mold. The polymer patterns formed in both cases were then carbonized into carbon black for region-specific growth of the aligned nanotubes in the polymer-free regions by pyrolysis of iron(II) phthalocyanine (FePc) under Ar/H 2 atmosphere at 800-1100 °C. Micropatterns of aligned nanotubes thus prepared have resolutions down to 0.8 μm, suitable for fabrication of various electronic and photonic devices.
|Number of pages||2|
|Journal||Journal of Physical Chemistry B|
|Publication status||Published - 16 Mar 2000|