Journal
ACS NANO
Volume 5, Issue 10, Pages 8288-8294Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn202967f
Keywords
spatially modulated electrostatic potential; multiplexed one-dimensional arrays; plasmonic nanoparticle; patterning; surface-enhanced Raman scattering
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Funding
- SERC-TSRP [1021520015]
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We report a new strategy to pattern plasmonic nanoparticles into multiplexed one-dimensional arrays based on the spatially modulated electrostatic potential. The 32 nm Au nanoparticles can be simultaneously deposited on one chip with tunable interparticle distance by solely adjusting the width of the grooves. Furthermore, 32 and 13 nm Au nanoparticles can be selectively deposited in grooves of different widths on one chip. As a result, the surface plasmon absorption bands on the chip can be tuned depending on the interparticle distance or the particle size of multiplex 1D arrays, which could enhance the Raman scattering cross section of the adsorbed molecules and result in multiplex surface-enhanced Raman scattering (SERS) response on the chip. This strategy provides a general method to fabricate 1D multiplex arrays with different particle sizes and interparticle distances on one chip.
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