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Tuneable surface enhanced Raman scattering metamaterial-like platforms via three-dimensional block copolymer based nanoarchitectures

Tuneable surface enhanced Raman scattering metamaterial-like platforms via three-dimensional block copolymer based nanoarchitectures
Tuneable surface enhanced Raman scattering metamaterial-like platforms via three-dimensional block copolymer based nanoarchitectures
Surface enhanced Raman spectroscopy (SERS) pushes past the boundaries and inherent weaknesses of Raman spectroscopy, with a great potential for a broad range of applications particularly, for sensing. Yet, current real world applications are limited due to poor reproducibility, low-throughput and stability issues. Here, we present the design and fabrication of self-assembly guided structures based on adjustable block copolymer (BCP) nano-morphologies and demonstrate reproducible SERS enhancement across large areas. Golden three-dimensional (3D) nanostructured morphologies with controllable dimensions and morphologies exhibit high chemical stability, enhanced plasmonic properties and are highly suitable for SERS substrates due to the strong enhancement of the electromagnetic field. Adjustable, free standing porous nanostructures, continuous in the 3D space are achieved by removal of selected BCP constituents. Four BCP morphologies and the corresponding achievable enhancement factors are investigated at 633 and 785nm excitation wavelengths. The choice of excitation laser is shown to greatly affect the observed signal enhancement, highlighting the sensitivity of the technique to the underlying surface architecture and length scales. By using BCP assemblies, it is possible to reliably tune these parameters to match specific applications thus, bridging the gap towards the realization of applied metamaterials. The fabricated SERS platforms via three-dimensional block copolymer based nanoarchitectures provide a recipe for intelligent engineering and design of optimised SERS-active substrates for utilisation in the Raman spectroscopy-based devices towards enabling the next-generation technologies fulfilling a multitude of criteria.
1944-8244
14437-14444
Banbury, Carl
40154cc7-4575-4ccc-b35e-064fc7d36a0e
Rickard, Jonathan James Stanley
7346432e-db03-44ae-81ba-7d0ba03fddda
Mahajan, Sumeet
b131f40a-479e-4432-b662-19d60d4069e9
Goldberg Oppenheimer, Pola
8955c6a5-21cb-4942-94d3-b8377b0ae1c4
Banbury, Carl
40154cc7-4575-4ccc-b35e-064fc7d36a0e
Rickard, Jonathan James Stanley
7346432e-db03-44ae-81ba-7d0ba03fddda
Mahajan, Sumeet
b131f40a-479e-4432-b662-19d60d4069e9
Goldberg Oppenheimer, Pola
8955c6a5-21cb-4942-94d3-b8377b0ae1c4

Banbury, Carl, Rickard, Jonathan James Stanley, Mahajan, Sumeet and Goldberg Oppenheimer, Pola (2019) Tuneable surface enhanced Raman scattering metamaterial-like platforms via three-dimensional block copolymer based nanoarchitectures. ACS Applied Materials & Interfaces, 11 (15), 14437-14444. (doi:10.1021/acsami.9b00420).

Record type: Article

Abstract

Surface enhanced Raman spectroscopy (SERS) pushes past the boundaries and inherent weaknesses of Raman spectroscopy, with a great potential for a broad range of applications particularly, for sensing. Yet, current real world applications are limited due to poor reproducibility, low-throughput and stability issues. Here, we present the design and fabrication of self-assembly guided structures based on adjustable block copolymer (BCP) nano-morphologies and demonstrate reproducible SERS enhancement across large areas. Golden three-dimensional (3D) nanostructured morphologies with controllable dimensions and morphologies exhibit high chemical stability, enhanced plasmonic properties and are highly suitable for SERS substrates due to the strong enhancement of the electromagnetic field. Adjustable, free standing porous nanostructures, continuous in the 3D space are achieved by removal of selected BCP constituents. Four BCP morphologies and the corresponding achievable enhancement factors are investigated at 633 and 785nm excitation wavelengths. The choice of excitation laser is shown to greatly affect the observed signal enhancement, highlighting the sensitivity of the technique to the underlying surface architecture and length scales. By using BCP assemblies, it is possible to reliably tune these parameters to match specific applications thus, bridging the gap towards the realization of applied metamaterials. The fabricated SERS platforms via three-dimensional block copolymer based nanoarchitectures provide a recipe for intelligent engineering and design of optimised SERS-active substrates for utilisation in the Raman spectroscopy-based devices towards enabling the next-generation technologies fulfilling a multitude of criteria.

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BCPs_SERS_f_Revised - Accepted Manuscript
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More information

Accepted/In Press date: 18 March 2019
e-pub ahead of print date: 18 March 2019
Published date: 17 April 2019

Identifiers

Local EPrints ID: 430208
URI: https://eprints.soton.ac.uk/id/eprint/430208
ISSN: 1944-8244
PURE UUID: 1b5dd52c-c104-47ca-89ed-0cf8eb9f6285
ORCID for Sumeet Mahajan: ORCID iD orcid.org/0000-0001-8923-6666

Catalogue record

Date deposited: 16 Apr 2019 16:30
Last modified: 04 May 2019 00:34

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Contributors

Author: Carl Banbury
Author: Jonathan James Stanley Rickard
Author: Sumeet Mahajan ORCID iD
Author: Pola Goldberg Oppenheimer

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