Visible wavelength surface-enhanced Raman spectroscopy from In-InP nanopillars for biomolecule detection

Visible wavelength surface-enhanced Raman spectroscopy (SERS) has been observed from bovine serum albumin (BSA) using In-InP nanopillars synthesised by Ar gas cluster ion beam sputtering of InP wafers. InP provides a high local refractive index for plasmonic In structures, which increases the wavele...

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Bibliographic Details
Published in:Applied physics letters 2016-12, Vol.109 (25)
Main Authors: Murdoch, B. J., Portoles, J. F., Tardio, S., Barlow, A. J., Fletcher, I. W., Cumpson, P. J.
Format: Article
Language:English
Subjects:
Applied physics
Biomolecules
Chemical synthesis
Clothing industry
Ion beam sputtering
Metal particles
Noble metals
Raman spectra
Raman spectroscopy
Refractivity
Resonance scattering
Serum albumin
Silicon substrates
Spectrum analysis
Yarn
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Summary:Visible wavelength surface-enhanced Raman spectroscopy (SERS) has been observed from bovine serum albumin (BSA) using In-InP nanopillars synthesised by Ar gas cluster ion beam sputtering of InP wafers. InP provides a high local refractive index for plasmonic In structures, which increases the wavelength of the In surface plasmon resonance. The Raman scattering signal was determined to be up to 285 times higher for BSA deposited onto In-InP nanopillars when compared with Si wafer substrates. These substrates demonstrate the label-free detection of biomolecules by visible wavelength SERS, without the use of noble metal particles.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4972558