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Modification of nanostructured gold surfaces with organic functional groups using electrochemical and solid-phase synthesis methodologies

Modification of nanostructured gold surfaces with organic functional groups using electrochemical and solid-phase synthesis methodologies
Modification of nanostructured gold surfaces with organic functional groups using electrochemical and solid-phase synthesis methodologies
Anthraquinone and nitrobenzene redox probes were covalently attached to nanostructured sphere segment void (SSV) gold substrates prepared using templated electrodeposition. Anthraquinone was attached to the SSV gold surface through an (aminomethyl)phenyl (NH2CH2C6H4) linker using a combination of electrochemical coupling and solid-phase modification. The nitrobenzene probe was directly immobilized by electrochemical reduction of the corresponding diazonium salt or by self-assembly of 4-nitrobenzene thiol. The surface coverages and stabilities of the modified gold surfaces were characterised by electrochemical and surface enhanced Raman scattering (SERS) techniques. The results demonstrate that electrochemical coupling followed by solid phase coupling is a flexible method for the functionalisation of nanostructured SSV, or other, gold surfaces. The use of the SSV gold substrate allows us to follow the different steps in the modification process using SERS. We find that that diazonium attachment to gold gives greater stability than the more commonly used thiol self-assembly approach.
diazonium coupling, sers, surface modification, anthraquinone
1572-6657
42-49
Celiktas, Ahmet
083dee5f-53c3-433e-8242-9da4c0cb11e2
Ghanem, Mohamed A.
cef6c814-2709-4a2f-a052-06d28d0ba04c
Bartlett, Philip N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Celiktas, Ahmet
083dee5f-53c3-433e-8242-9da4c0cb11e2
Ghanem, Mohamed A.
cef6c814-2709-4a2f-a052-06d28d0ba04c
Bartlett, Philip N.
d99446db-a59d-4f89-96eb-f64b5d8bb075

Celiktas, Ahmet, Ghanem, Mohamed A. and Bartlett, Philip N. (2012) Modification of nanostructured gold surfaces with organic functional groups using electrochemical and solid-phase synthesis methodologies. Journal of Electroanalytical Chemistry, 670, 42-49. (doi:10.1016/j.jelechem.2012.02.008).

Record type: Article

Abstract

Anthraquinone and nitrobenzene redox probes were covalently attached to nanostructured sphere segment void (SSV) gold substrates prepared using templated electrodeposition. Anthraquinone was attached to the SSV gold surface through an (aminomethyl)phenyl (NH2CH2C6H4) linker using a combination of electrochemical coupling and solid-phase modification. The nitrobenzene probe was directly immobilized by electrochemical reduction of the corresponding diazonium salt or by self-assembly of 4-nitrobenzene thiol. The surface coverages and stabilities of the modified gold surfaces were characterised by electrochemical and surface enhanced Raman scattering (SERS) techniques. The results demonstrate that electrochemical coupling followed by solid phase coupling is a flexible method for the functionalisation of nanostructured SSV, or other, gold surfaces. The use of the SSV gold substrate allows us to follow the different steps in the modification process using SERS. We find that that diazonium attachment to gold gives greater stability than the more commonly used thiol self-assembly approach.

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More information

Published date: 1 April 2012
Keywords: diazonium coupling, sers, surface modification, anthraquinone
Organisations: Electrochemistry

Identifiers

Local EPrints ID: 349752
URI: https://eprints.soton.ac.uk/id/eprint/349752
ISSN: 1572-6657
PURE UUID: b01e71ee-2075-4022-9ba6-a57675d14966
ORCID for Philip N. Bartlett: ORCID iD orcid.org/0000-0002-7300-6900

Catalogue record

Date deposited: 08 Mar 2013 17:56
Last modified: 20 Jul 2019 01:22

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Contributors

Author: Ahmet Celiktas
Author: Mohamed A. Ghanem

University divisions

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