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Dendrimer Driven Self-Assembly of SPR Active Silver–Gold Nanohybrids

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† § National Biophotonics and Imaging Platform, School of Physical Sciences, National Biophotonics and Imaging Platform, School of Biotechnology, §Biomedical Diagnostics Institute, and School of Electronic Engineering, Dublin City University, Glasnevin, Dublin 9, Ireland
Cite this: Langmuir 2013, 29, 14, 4430–4433
Publication Date (Web):March 19, 2013
https://doi.org/10.1021/la4001285
Copyright © 2013 American Chemical Society

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    Abstract

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    A fourth generation PAMAM dendrimer has been successfully employed for the development of a single step synthesis strategy for self-assembled Ag–Au nanohybrid structures. The surface plasmon resonance properties and the degree of self-assembly of the nanohybrid are strongly correlated with the stoichiometry of the metals which gives rise to enhanced plasmonic properties. The enhanced plasmonic response of the nanohybrids is modeled and is validated experimentally in a model HRP (horseradish peroxidise) bioassay carried out on an SPR-based biochip platform.

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    Synthesis methodology, instrumentation details, UV/vis spectroscopy for control nanoparticles, and Raman spectroscopy for nanohybrids. This material is available free of charge via the Internet at http://pubs.acs.org.

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