Self assembly of plasmonic core-satellite nano-assemblies mediated by hyperbranched polymer linkers

Dey, Priyanka, Zhu, Shaoli, Thurecht, Kristofer J., Fredericks, Peter M. and Blakey, Idriss (2014) Self assembly of plasmonic core-satellite nano-assemblies mediated by hyperbranched polymer linkers. Journal of Materials Chemistry B, 2 19: 2827-2837. doi:10.1039/c4tb00263f


Author Dey, Priyanka
Zhu, Shaoli
Thurecht, Kristofer J.
Fredericks, Peter M.
Blakey, Idriss
Title Self assembly of plasmonic core-satellite nano-assemblies mediated by hyperbranched polymer linkers
Journal name Journal of Materials Chemistry B   Check publisher's open access policy
ISSN 2050-750X
2050-7518
Publication date 2014-05-21
Year available 2014
Sub-type Article (original research)
DOI 10.1039/c4tb00263f
Open Access Status Not Open Access
Volume 2
Issue 19
Start page 2827
End page 2837
Total pages 11
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Collection year 2015
Language eng
Subject 1600 Chemistry
2204 Religion and Religious Studies
2700 Medicine
2500 Materials Science
Abstract The morphology of plasmonic nano-assemblies has a direct influence on optical properties, such as localised surface plasmon resonance (LSPR) and surface enhanced Raman scattering (SERS) intensity. Assemblies with core-satellite morphologies are of particular interest, because this morphology has a high density of hot-spots, while constraining the overall size. Herein, a simple method is reported for the self-assembly of gold NPs nano-assemblies with a core-satellite morphology, which was mediated by hyperbranched polymer (HBP) linkers. The HBP linkers have repeat units that do not interact strongly with gold NPs, but have multiple end-groups that specifically interact with the gold NPs and act as anchoring points resulting in nano-assemblies with a large (∼48 nm) core surrounded by smaller (∼15 nm) satellites. It was possible to control the number of satellites in an assembly which allowed optical parameters such as SPR maxima and the SERS intensity to be tuned. These results were found to be consistent with finite-difference time domain (FDTD) simulations. Furthermore, the multiplexing of the nano-assemblies with a series of Raman tag molecules was demonstrated, without an observable signal arising from the HBP linker after tagging. Such plasmonic nano-assemblies could potentially serve as efficient SERS based diagnostics or biomedical imaging agents in nanomedicine.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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