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

Lookup NU author(s): Dr Billy Murdoch, Dr Jose Portoles, Dr Sabrina Tardio, Dr Anders Barlow, Professor Ian Fletcher, Professor Peter Cumpson

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Abstract

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.

Publication metadata

Author(s): Murdoch B, Portoles J, Tardio S, Barlow A, Fletcher I, Cumpson P

Publication type: Article

Publication status: Published

Journal: Applied Physics Letters

Year: 2016

Volume: 109

Issue: 25

Print publication date: 19/12/2016

Online publication date: 19/12/2016

Acceptance date: 07/12/2016

Date deposited: 14/12/2016

ISSN (print): 0003-6951

ISSN (electronic): 1077-3118

Publisher: AIP Publishing

URL: http://dx.doi.org/10.1063/1.4972558

DOI: 10.1063/1.4972558

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