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Deposition of Functionalised Gold Nanoparticles by the Layer-by-Layer Electrostatic Technique

Published online by Cambridge University Press:  01 February 2011

S. Paul ,
M. Palumbo ,
M. C. Petty ,
N. Cant  and
S. D. Evans
S. Paul
Affiliation:
School of Engineering and Centre for Molecular and Nanoscale Electronics, University of Durham, Durham DH1 3LE, UK
M. Palumbo
Affiliation:
School of Engineering and Centre for Molecular and Nanoscale Electronics, University of Durham, Durham DH1 3LE, UK
M. C. Petty
Affiliation:
School of Engineering and Centre for Molecular and Nanoscale Electronics, University of Durham, Durham DH1 3LE, UK
N. Cant
Affiliation:
Department of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK
S. D. Evans
Affiliation:
Department of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK
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Abstract

Intensive research is currently underway to exploit the intriguing optical and electronic behaviour of nano-sized particles. The basis of the unique properties of these particles is the smallness of their size; dimensions on the nanometre scale can result in interesting quantum mechanical phenomena, such as Coulomb blockade. There are currently a number of ways by which the nanoparticles can be deposited onto solid substrates. Here, we report on the use of the layer-by-layer electrostatic method, which has shown much promise in the context of deposition of thin films of certain organic materials. In this technique, layers of oppositely charged materials are generated by dipping an appropriate substrate into solutions of polyelectrolytes. For example, the polybases poly(ethyleneimine) (PEI), when adsorbed on a substrate, produce a positively charged surface. We have deposited carboxylic acid (-COOH) derivatised gold nanoparticles onto a PEI-coated silicon substrate and an amine funtionalised silicon substrate. The distribution of the gold nanoparticles was compared using atomic force microscopy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 789 , 2003 , N9.12
Copyright
Copyright © Materials Research Society 2004

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Footnotes

*

Department of Ceramic and Materials Engineering, The State University of New Jersey, 607 Taylor Road, Piscataway, NJ 08854-8065, USA

References

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