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Issue 28, 2021, Issue in Progress
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Tunable photoluminescence and SERS behaviour of additively manufactured Au nanoparticle patterns

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Abstract

The ability to tune the localised surface plasmon resonance (LSPR) behaviour of metal nanostructures has great importance for many optical sensor applications such as metal (plasmon) enhanced fluorescence spectroscopy and surface-enhanced Raman scattering (SERS). In this paper, we used Aerosol Direct Writing (ADW) to selectively deposit fine gold nanoparticles (AuNPs) patterns. A low-temperature thermal post-treatment (below 200 °C) provides enough energy to merge and transform AuNPs into larger features significantly different from non-thermally treated samples. The optical behaviour of non-treated and thermally treated AuNP films was investigated by photoluminescence (PL) spectroscopy. The PL measurements showed a red-shift, compared to bulk gold, using 488 nm and 514 nm laser excitation, and a blue-shift using 633 nm laser excitation. The thermal post-treatment leads to a further blue-shift compared to non-treated samples in the presence of both 514 and 633 nm laser. Finally, the AuNPs patterns were employed as a SERS-active substrate to detect low-concentrated (10−8 M) rhodamine B. This method's ability to selectively deposit 3D gold nanostructures and tune their optical behaviour through a low-temperature thermal treatment allows optimisation of the optical response and enhancement of the Raman signal for specific bio-analytes.

Graphical abstract: Tunable photoluminescence and SERS behaviour of additively manufactured Au nanoparticle patterns

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Supplementary files

Article information


Submitted
22 Mar 2021
Accepted
30 Apr 2021
First published
06 May 2021

This article is Open Access

RSC Adv., 2021,11, 16849-16859
Article type
Paper

Tunable photoluminescence and SERS behaviour of additively manufactured Au nanoparticle patterns

S. Aghajani, A. Accardo and M. Tichem, RSC Adv., 2021, 11, 16849
DOI: 10.1039/D1RA02266K

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

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    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
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    [Original citation] - Published by The Royal Society of Chemistry.

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