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Nanopores within 3D-structured gold film for sensing applications

Nanopores within 3D-structured gold film for sensing applications
Nanopores within 3D-structured gold film for sensing applications
The design and fabrication of nanopores within three-dimensionally structured gold films with spherical microcavities of 1.2 µm diameter and 0.6 µm deep in hexagonal close-packed arrays, are described. The cavities are fabricated by electroplating gold around self-assembled arrays of polymer spheres. Following removal of the spheres, and 'lift-off' of the 3D structured gold film, some of the microcavities were milled with a Helium Ion Microscope to provide nanopores through the centre of the microcavity base right through the film. The geometry of the nanopore within the device is designed using theoretical approaches to provide the optimal electric field intensity in the very centre of the nanopore when excited with light of ~ 600 nm (in water). In this paper we report the theoretical simulations used to evaluate the optimal geometry of the nanopore within the centre/base of the gold microcavity. Although a number of various geometries and sizes of pores were considered the theoretical results provide evidence that a pore of 50nm with rounded corners will provide the greatest electrical field intensity inside the pore and the fabrication results provide a demonstrated practical approach for creation of these nanopores within these 3D gold structured films.
Carpignano, Francesca
16438e4c-f628-43a4-9edb-8d8ef62136d2
Silva, Gloria
3761baa1-b23d-47ec-8172-c86c06fa6c45
Noual, Adnane
cc1e323d-dcac-4068-a38d-dc20daf02e93
Pechstedt, Katrin
8fcd400c-c54d-49d3-bd5b-7dd4cf32f140
Grant-Jacob, James
c5d144d8-3c43-4195-8e80-edd96bfda91b
Brocklesby, W.S.
c53ca2f6-db65-4e19-ad00-eebeb2e6de67
Horak, Peter
520489b5-ccc7-4d29-bb30-c1e36436ea03
Boden, Stuart
83976b65-e90f-42d1-9a01-fe9cfc571bf8
Melvin, Tracy
fd87f5eb-2bb9-48fa-b7be-7100ace9c50f
Carpignano, Francesca
16438e4c-f628-43a4-9edb-8d8ef62136d2
Silva, Gloria
3761baa1-b23d-47ec-8172-c86c06fa6c45
Noual, Adnane
cc1e323d-dcac-4068-a38d-dc20daf02e93
Pechstedt, Katrin
8fcd400c-c54d-49d3-bd5b-7dd4cf32f140
Grant-Jacob, James
c5d144d8-3c43-4195-8e80-edd96bfda91b
Brocklesby, W.S.
c53ca2f6-db65-4e19-ad00-eebeb2e6de67
Horak, Peter
520489b5-ccc7-4d29-bb30-c1e36436ea03
Boden, Stuart
83976b65-e90f-42d1-9a01-fe9cfc571bf8
Melvin, Tracy
fd87f5eb-2bb9-48fa-b7be-7100ace9c50f

Carpignano, Francesca, Silva, Gloria, Noual, Adnane, Pechstedt, Katrin, Grant-Jacob, James, Brocklesby, W.S., Horak, Peter, Boden, Stuart and Melvin, Tracy (2016) Nanopores within 3D-structured gold film for sensing applications. 18th Italian National Conference on Photonic Technologies (Fotonica 2016), Italy. 06 - 08 Jun 2016. (doi:10.1049/cp.2016.0933).

Record type: Conference or Workshop Item (Paper)

Abstract

The design and fabrication of nanopores within three-dimensionally structured gold films with spherical microcavities of 1.2 µm diameter and 0.6 µm deep in hexagonal close-packed arrays, are described. The cavities are fabricated by electroplating gold around self-assembled arrays of polymer spheres. Following removal of the spheres, and 'lift-off' of the 3D structured gold film, some of the microcavities were milled with a Helium Ion Microscope to provide nanopores through the centre of the microcavity base right through the film. The geometry of the nanopore within the device is designed using theoretical approaches to provide the optimal electric field intensity in the very centre of the nanopore when excited with light of ~ 600 nm (in water). In this paper we report the theoretical simulations used to evaluate the optimal geometry of the nanopore within the centre/base of the gold microcavity. Although a number of various geometries and sizes of pores were considered the theoretical results provide evidence that a pore of 50nm with rounded corners will provide the greatest electrical field intensity inside the pore and the fabrication results provide a demonstrated practical approach for creation of these nanopores within these 3D gold structured films.

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e-pub ahead of print date: 2016
Venue - Dates: 18th Italian National Conference on Photonic Technologies (Fotonica 2016), Italy, 2016-06-06 - 2016-06-08
Organisations: Optoelectronics Research Centre, Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 405214
URI: https://eprints.soton.ac.uk/id/eprint/405214
PURE UUID: 41c72740-b631-4e9f-b7c6-3b19c7e0cfbb
ORCID for James 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 Peter Horak: ORCID iD orcid.org/0000-0002-8710-8764
ORCID for Stuart Boden: ORCID iD orcid.org/0000-0002-4232-1828

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Date deposited: 30 Jan 2017 12:15
Last modified: 15 Jul 2019 19:43

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