Ordered silver and copper nanorod arrays for enhanced Raman scattering created via guided oblique angle deposition on polymer

M. Keating, S. Song, G. Wei, D. Graham, Y. Chen, F. Placido

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We report the manufacture of ordered silver and copper nanorod arrays for surface-enhanced Raman scattering using oblique angle deposition (OAD) on prepatterned polymer sheets. It was found that the patterned polymer substrate defined nucleation sites which guided subsequent growth of nanorods. Enhanced surface-enhanced Raman spectroscopy (SERS) intensities of the Raman probe molecule trans-1,2-bis(4-pyridyl)ethylene (BPE) were found for Ag arrays on polymer, up to about 10 times that of the Ag-silica control. The SERS response of Ag nanorod arrays of different structures was investigated alongside results obtained from discrete dipole approximation simulations. This revealed that narrow gaps between nanorods, formed by guided nucleation during OAD, were responsible for this dramatic enhancement. Ordered Cu nanorod arrays were also successfully fabricated, producing a SERS intensity about 3 times that of Cu on silicon for both BPE and another Raman probe - rhodamine B isothiocyanate (RBITC) - highlighting the potential of this large-scale, low-cost, SERS-active substrate.

LanguageEnglish
Pages4878-4884
Number of pages7
JournalJournal of Physical Chemistry C
Volume118
Issue number9
Early online date11 Feb 2014
DOIs
Publication statusPublished - 6 Mar 2014

Fingerprint

Nanorods
Silver
nanorods
Raman scattering
Copper
Polymers
silver
Raman spectroscopy
Raman spectra
copper
polymers
Nucleation
nucleation
probes
Silicon
Substrates
rhodamine
Silicon Dioxide
Ethylene
ethylene

Keywords

  • silver nanorod arrays
  • copper nanorod arrays
  • Raman scattering

Cite this

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abstract = "We report the manufacture of ordered silver and copper nanorod arrays for surface-enhanced Raman scattering using oblique angle deposition (OAD) on prepatterned polymer sheets. It was found that the patterned polymer substrate defined nucleation sites which guided subsequent growth of nanorods. Enhanced surface-enhanced Raman spectroscopy (SERS) intensities of the Raman probe molecule trans-1,2-bis(4-pyridyl)ethylene (BPE) were found for Ag arrays on polymer, up to about 10 times that of the Ag-silica control. The SERS response of Ag nanorod arrays of different structures was investigated alongside results obtained from discrete dipole approximation simulations. This revealed that narrow gaps between nanorods, formed by guided nucleation during OAD, were responsible for this dramatic enhancement. Ordered Cu nanorod arrays were also successfully fabricated, producing a SERS intensity about 3 times that of Cu on silicon for both BPE and another Raman probe - rhodamine B isothiocyanate (RBITC) - highlighting the potential of this large-scale, low-cost, SERS-active substrate.",
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Ordered silver and copper nanorod arrays for enhanced Raman scattering created via guided oblique angle deposition on polymer. / Keating, M.; Song, S.; Wei, G.; Graham, D.; Chen, Y.; Placido, F.

In: Journal of Physical Chemistry C, Vol. 118, No. 9, 06.03.2014, p. 4878-4884.

Research output: Contribution to journalArticle

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AU - Song, S.

AU - Wei, G.

AU - Graham, D.

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AU - Placido, F.

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