Self-assembly templates, consisting of micro-patterned hydrophobic and hydrophilic regions, are fabricated using a plasma surface modification technique. With exposure to O2 plasma, photoresist, silicon, and glass can be modified to hydrophilic surfaces. When followed by SF6 or CF4 plasma, the surface of photoresist can be modified to hydrophobic while silicon and glass surfaces are not affected. The difference in surface energy between the hydrophilic and hydrophobic regions is large, as indicated by the differential contact angle of 120° between the two regions for wetting with water. Photonic crystals are made from colloidal solutions and protein patterning is demonstrated using self-assembly templates made by selective plasma surface modification. The maximized surface energy difference between substrate and template patterning allows an ideal self-assembly of photonic crystals and selective attachment of proteins.
|Number of pages||4|
|State||Published - 2002|
|Event||15th IEEE International Conference on Micro Electro Mechanical Systems MEMS 2002 - Las Vegas, NV, United States|
Duration: 20 Jan 2002 → 24 Jan 2002
|Conference||15th IEEE International Conference on Micro Electro Mechanical Systems MEMS 2002|
|City||Las Vegas, NV|
|Period||20/01/02 → 24/01/02|