Facile fabrication of superhydrophobic gold loaded nanoporous anodic alumina as surface-enhanced Raman spectroscopy substrates

Choudhari, KS and Sinha, Rajeev K and Kulkarni, Suresh D and Santhosh, C and George, Sajan D (2022) Facile fabrication of superhydrophobic gold loaded nanoporous anodic alumina as surface-enhanced Raman spectroscopy substrates. Journal of Optics, 24 (4). pp. 1-10. ISSN 2040-8978

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Abstract

A facile method of creating a sensitive and inexpensive superhydrophobic nanoporous anodic alumina (NAA) based surface-enhanced Raman spectroscopy (SERS) substrate is reported. A superhydrophobic NAA was created by coating polydimethylsiloxane on NAA via polymer evaporation technique which further coated with gold to fabricate NAA-based superhydrophobic SERS substrate. NAA and nanopatterned aluminum with varying pore properties were used for the SERS studies using rhodamine 6 G as the model analyte. The limit of detection was calculated for the SERS substrate and found to be as low as 146.3 pM. The analytical enhancement factor was found to be 6.9 × 105 successfully demonstrating the potential use of NAA-based superhydrophobic substrate as a SERS substrate. The substrates displayed good spatial reproducibility with a relative standard deviation of 12.62%, demonstrating the potential use of such substrates in chemical and biological sensing applications. The method reported is general and provides a simple and cost-effective approach for generating efficient SERS platforms for trace molecular sensing.

Item Type: Article
Uncontrolled Keywords: Nanoporous anodic alumina; surface-enhanced Raman spectroscopy; superhydrophobic.
Subjects: Departments at MU > Atomic Molecular Physics
Depositing User: KMC Library
Date Deposited: 29 Mar 2022 11:36
Last Modified: 29 Mar 2022 11:36
URI: http://eprints.manipal.edu/id/eprint/158511

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