Dual length-scale nanotip arrays with controllable morphological features for highly sensitive SERS applications

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Hexagonally ordered, dual length-scale nanotip arrays were fabricated using a combination of prism holographic lithography, reactive ion etching, and electron-beam evaporation. Double layered, face-centered cubic structures were prepared using prism holographic lithography and were used as templates for the nanotip arrays. The morphological features of the nanotip arrays were easily controlled in the subsequent etching process by varying the etching time and etchant gases. The surfaces of the nanotips were covered with, and roughened by, small protrusions. The nanotip arrays showed tunable surface-enhanced Raman scattering activities that depended on the sharpness, shape, and surface roughness. The simple tunability and high sensitivity of these nanotip arrays make them very promising as a high-fidelity sensing platform.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2012-11
Language
English
Article Type
Article
Keywords

ENHANCED RAMAN-SCATTERING; HOLOGRAPHIC LITHOGRAPHY; INTERFERENCE LITHOGRAPHY; PHOTONIC CRYSTALS; ORDERED ARRAYS; FABRICATION; NANOSTRUCTURES

Citation

JOURNAL OF MATERIALS CHEMISTRY, v.22, no.44, pp.23650 - 23654

ISSN
0959-9428
DOI
10.1039/c2jm34470j
URI
http://hdl.handle.net/10203/104564
Appears in Collection
CBE-Journal Papers(저널논문)
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