Abstract
This paper describes a facile strategy for fabricating arrays of two- and three-dimensional gold nanostructures using PDMS-infiltrated polystyrene (PS) colloidal crystals. PDMS molding of colloidal crystal, gold vapor deposition, and subsequent calcination of PS produced gold thin layers over hexagonal PDMS microwell arrays with hemispherical air-voids of approximately 140 nm on glass substrates. Vapor deposition of perfluoroalkylsilane thin layers improved the thermal stability of the colloidal template over 100 °C, providing a route to preparation of hollow architectures with gold thin layers supported by PDMS nanostructures. Surface modification of the PDMS using poly(allylamine hydrochloride) induced two-dimensional colloidal crystals of PS and PMMA spheres through electrostatic interactions. Particle aggregation of 13 nm gold nanoparticles in the PDMS microwells demonstrated a surface plasmon resonance band red-shifted to 810 nm, in comparison with that on the flat surface at 720 nm.
| Original language | English |
|---|---|
| Pages (from-to) | 2066-2072 |
| Number of pages | 7 |
| Journal | Applied Surface Science |
| Volume | 256 |
| Issue number | 7 |
| DOIs | |
| State | Published - 15 Jan 2010 |
| Externally published | Yes |
Keywords
- Colloidal crystal
- Organic-inorganic hybrid
- Reinforced polymer
- Self-assembly
- Surface modification
- Thermal stability
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