The University of Southampton
University of Southampton Institutional Repository

Precise subnanometer plasmonic junctions for SERS within gold nanoparticle assemblies using cucurbit[n]uril “Glue”

Precise subnanometer plasmonic junctions for SERS within gold nanoparticle assemblies using cucurbit[n]uril “Glue”
Precise subnanometer plasmonic junctions for SERS within gold nanoparticle assemblies using cucurbit[n]uril “Glue”
Cucurbit[n]urils (CB[n]) are macrocyclic host molecules with subnanometer dimensions capable of binding to gold surfaces. Aggregation of gold nanoparticles with CB[n] produces a repeatable, fixed, and rigid interparticle separation of 0.9 nm, and thus such assemblies possess distinct and exquisitely sensitive plasmonics. Understanding the plasmonic evolution is key to their use as powerful SERS substrates. Furthermore, this unique spatial control permits fast nanoscale probing of the plasmonics of the aggregates “glued” together by CBs within different kinetic regimes using simultaneous extinction and SERS measurements. The kinetic rates determine the topology of the aggregates including the constituent structural motifs and allow the identification of discrete plasmon modes which are attributed to disordered chains of increasing lengths by theoretical simulations. The CBs directly report the near-field strength of the nanojunctions they create via their own SERS, allowing calibration of the enhancement. Owing to the unique barrel-shaped geometry of CB[n] and their ability to bind “guest” molecules, the aggregates afford a new type of in situ self-calibrated and reliable SERS substrate where molecules can be selectively trapped by the CB[n] and exposed to the nanojunction plasmonic field. Using this concept, a powerful molecular-recognition-based SERS assay is demonstrated by selective cucurbit[n]uril host–guest complexation

1936-0851
3878-3887
Taylor, Richard W.
14b4e086-50e8-4161-8314-7de98f1ef695
Lee, Tung-Chun
818215d9-9d5d-477a-92f8-420820544be3
Scherman, Oren A.
4889711e-5279-4211-b6ae-bbe70846e1ef
Esteban, Ruben
d5043d1a-afd0-4a4d-a01a-0cfe94693299
Aizpurua, Javier
17705349-38e3-4089-adba-547d02449095
Huang, Fu Min
1e6fc160-8f6c-48f9-ad58-b993047b5a30
Baumberg, Jeremy J.
51423b5f-bdb8-4851-8d50-472253ceb12c
Mahajan, Sumeet
b131f40a-479e-4432-b662-19d60d4069e9
Taylor, Richard W.
14b4e086-50e8-4161-8314-7de98f1ef695
Lee, Tung-Chun
818215d9-9d5d-477a-92f8-420820544be3
Scherman, Oren A.
4889711e-5279-4211-b6ae-bbe70846e1ef
Esteban, Ruben
d5043d1a-afd0-4a4d-a01a-0cfe94693299
Aizpurua, Javier
17705349-38e3-4089-adba-547d02449095
Huang, Fu Min
1e6fc160-8f6c-48f9-ad58-b993047b5a30
Baumberg, Jeremy J.
51423b5f-bdb8-4851-8d50-472253ceb12c
Mahajan, Sumeet
b131f40a-479e-4432-b662-19d60d4069e9

Taylor, Richard W., Lee, Tung-Chun, Scherman, Oren A., Esteban, Ruben, Aizpurua, Javier, Huang, Fu Min, Baumberg, Jeremy J. and Mahajan, Sumeet (2011) Precise subnanometer plasmonic junctions for SERS within gold nanoparticle assemblies using cucurbit[n]uril “Glue”. ACS Nano, 5 (5), 3878-3887. (doi:10.1021/nn200250v).

Record type: Article

Abstract

Cucurbit[n]urils (CB[n]) are macrocyclic host molecules with subnanometer dimensions capable of binding to gold surfaces. Aggregation of gold nanoparticles with CB[n] produces a repeatable, fixed, and rigid interparticle separation of 0.9 nm, and thus such assemblies possess distinct and exquisitely sensitive plasmonics. Understanding the plasmonic evolution is key to their use as powerful SERS substrates. Furthermore, this unique spatial control permits fast nanoscale probing of the plasmonics of the aggregates “glued” together by CBs within different kinetic regimes using simultaneous extinction and SERS measurements. The kinetic rates determine the topology of the aggregates including the constituent structural motifs and allow the identification of discrete plasmon modes which are attributed to disordered chains of increasing lengths by theoretical simulations. The CBs directly report the near-field strength of the nanojunctions they create via their own SERS, allowing calibration of the enhancement. Owing to the unique barrel-shaped geometry of CB[n] and their ability to bind “guest” molecules, the aggregates afford a new type of in situ self-calibrated and reliable SERS substrate where molecules can be selectively trapped by the CB[n] and exposed to the nanojunction plasmonic field. Using this concept, a powerful molecular-recognition-based SERS assay is demonstrated by selective cucurbit[n]uril host–guest complexation

Text
nn200250v - Version of Record
Restricted to Repository staff only
Request a copy

More information

Published date: 13 April 2011
Organisations: Chemistry, Physics & Astronomy, Institute for Life Sciences

Identifiers

Local EPrints ID: 340199
URI: http://eprints.soton.ac.uk/id/eprint/340199
ISSN: 1936-0851
PURE UUID: 07576320-2236-465f-9db6-f67ff09f148e
ORCID for Sumeet Mahajan: ORCID iD orcid.org/0000-0001-8923-6666

Catalogue record

Date deposited: 15 Jun 2012 07:41
Last modified: 18 Feb 2021 17:09

Export record

Altmetrics

Contributors

Author: Richard W. Taylor
Author: Tung-Chun Lee
Author: Oren A. Scherman
Author: Ruben Esteban
Author: Javier Aizpurua
Author: Fu Min Huang
Author: Jeremy J. Baumberg
Author: Sumeet Mahajan ORCID iD

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×