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A nanoporous gold membrane for sensing applications

A nanoporous gold membrane for sensing applications
A nanoporous gold membrane for sensing applications
Design and fabrication of three-dimensionally structured, gold membranes containing hexagonally close-packed microcavities with nanopores in the base, are described. Our aim is to create a nanoporous structure with localized enhancement of the fluorescence or Raman scattering at, and in the nanopore when excited with light of approximately 600 nm, with a view to provide sensitive detection of biomolecules. A range of geometries of the nanopore integrated into hexagonally close-packed assemblies of gold micro-cavities was first evaluated theoretically. The optimal size and shape of the nanopore in a single microcavity were then considered to provide the highest localized plasmon enhancement (of fluorescence or Raman scattering) at the very center of the nanopore for a bioanalyte traversing through. The optimized design was established to be a 1200 nm diameter cavity of 600 nm depth with a 50 nm square nanopore with rounded corners in the base. A gold 3D-structured membrane containing these sized microcavities with the integrated nanopore was successfully fabricated and ‘proof of concept’ Raman scattering experiments are described.
nanopore, polymer sphere, gold membrane, plasmons, sensing, SERS
2214-1804
1-8
Oo, S.Z.
6495f6da-8f17-4484-98fb-6151b4efbd9a
Silva, G.
1140db56-800e-4434-ab63-7f9e6ccf39b4
Carpignano, F.
e794e71c-1adf-407d-aa80-5b302bc39864
Noual, A.
5c5d5d71-3417-4e61-93fa-4b2c2bdc3513
Pechstedt, K.
5f19e079-7d39-422b-aab5-578a0c3dd0a7
Mateos, L.
4b1917f7-4dc8-4cf1-b22f-6622a665660a
Grant-Jacob, J.A.
c5d144d8-3c43-4195-8e80-edd96bfda91b
Brocklesby, W.S.
c53ca2f6-db65-4e19-ad00-eebeb2e6de67
Horak, P.
520489b5-ccc7-4d29-bb30-c1e36436ea03
Charlton, M.
fcf86ab0-8f34-411a-b576-4f684e51e274
Boden, S.A.
83976b65-e90f-42d1-9a01-fe9cfc571bf8
Melvin, Tracy
fd87f5eb-2bb9-48fa-b7be-7100ace9c50f
Oo, S.Z.
6495f6da-8f17-4484-98fb-6151b4efbd9a
Silva, G.
1140db56-800e-4434-ab63-7f9e6ccf39b4
Carpignano, F.
e794e71c-1adf-407d-aa80-5b302bc39864
Noual, A.
5c5d5d71-3417-4e61-93fa-4b2c2bdc3513
Pechstedt, K.
5f19e079-7d39-422b-aab5-578a0c3dd0a7
Mateos, L.
4b1917f7-4dc8-4cf1-b22f-6622a665660a
Grant-Jacob, J.A.
c5d144d8-3c43-4195-8e80-edd96bfda91b
Brocklesby, W.S.
c53ca2f6-db65-4e19-ad00-eebeb2e6de67
Horak, P.
520489b5-ccc7-4d29-bb30-c1e36436ea03
Charlton, M.
fcf86ab0-8f34-411a-b576-4f684e51e274
Boden, S.A.
83976b65-e90f-42d1-9a01-fe9cfc571bf8
Melvin, Tracy
fd87f5eb-2bb9-48fa-b7be-7100ace9c50f

Oo, S.Z., Silva, G., Carpignano, F., Noual, A., Pechstedt, K., Mateos, L., Grant-Jacob, J.A., Brocklesby, W.S., Horak, P., Charlton, M., Boden, S.A. and Melvin, Tracy (2016) A nanoporous gold membrane for sensing applications. Sensing and Bio-Sensing Research, 1-8. (doi:10.1016/j.sbsr.2016.01.001).

Record type: Article

Abstract

Design and fabrication of three-dimensionally structured, gold membranes containing hexagonally close-packed microcavities with nanopores in the base, are described. Our aim is to create a nanoporous structure with localized enhancement of the fluorescence or Raman scattering at, and in the nanopore when excited with light of approximately 600 nm, with a view to provide sensitive detection of biomolecules. A range of geometries of the nanopore integrated into hexagonally close-packed assemblies of gold micro-cavities was first evaluated theoretically. The optimal size and shape of the nanopore in a single microcavity were then considered to provide the highest localized plasmon enhancement (of fluorescence or Raman scattering) at the very center of the nanopore for a bioanalyte traversing through. The optimized design was established to be a 1200 nm diameter cavity of 600 nm depth with a 50 nm square nanopore with rounded corners in the base. A gold 3D-structured membrane containing these sized microcavities with the integrated nanopore was successfully fabricated and ‘proof of concept’ Raman scattering experiments are described.

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1-s2.0-S2214180416300022-main.pdf__tid=7ef26b6c-d4cd-11e5-9e60-00000aacb35f&acdnat=1455641656_dd84c1d009ecb04cca676883e7dafea9 - Accepted Manuscript
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More information

Accepted/In Press date: 2 January 2016
e-pub ahead of print date: 11 January 2016
Keywords: nanopore, polymer sphere, gold membrane, plasmons, sensing, SERS
Organisations: Optoelectronics Research Centre, Electronics & Computer Science

Identifiers

Local EPrints ID: 387913
URI: https://eprints.soton.ac.uk/id/eprint/387913
ISSN: 2214-1804
PURE UUID: ba352c0c-42d3-43dd-88f9-0c53171676e8
ORCID for J.A. Grant-Jacob: ORCID iD orcid.org/0000-0002-4270-4247
ORCID for W.S. Brocklesby: ORCID iD orcid.org/0000-0002-2123-6712
ORCID for P. Horak: ORCID iD orcid.org/0000-0002-8710-8764
ORCID for S.A. Boden: ORCID iD orcid.org/0000-0002-4232-1828

Catalogue record

Date deposited: 16 Feb 2016 16:55
Last modified: 09 Oct 2018 00:36

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