期刊
APPLIED SURFACE SCIENCE
卷 254, 期 16, 页码 5134-5140出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2008.02.018
关键词
PDMS; microwells; self-assembly; micro-contact printing; gold nanopattern; colloidal crystal
A new constructive method of fabricating a nanoparticle self-assembly on the patterned surface of a poly(dimethylsiloxane) (PDMS) relief nanostructure was demonstrated. Patterned PDMS templates with close-packed microwells were fabricated by molding against a self-assembled monolayer of polystyrene spheres. Alkanethiol-functionalized gold nanoparticles with an average particle size of 2.5 nm were selectively deposited onto a hydrophobic self-assembled monolayer printed on the substrate by the micro-contact printing (mu CP) of the prepared PDMS microwell, in which the patterned gold nanoparticles consisted of close-packed hexagons with an average diameter of 370 nm. In addition, two-dimensional colloidal crystals derived from PMMA microspheres with a diameter of 380 nm and a negative surface charge were successfully formed on the hemispherical microwells by electrostatic force using positively charged PAH-coated PDMS as a template to produce multidimensional nanostructures. (C) 2008 Elsevier B.V. All rights reserved.
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