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Controlling gold nanoparticle assembly on electron beam-reduced nitrophenyl self-assembled monolayers via electron dose
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Leigh, Simon J., Prieto, Jose L., Bowen, James, Lewis, Scott, Robinson, Alex P. G., Iqbal, Parvez and Preece, Jon A. (2013) Controlling gold nanoparticle assembly on electron beam-reduced nitrophenyl self-assembled monolayers via electron dose. Colloids and Surfaces A: Physicochemical and Engineering Aspects, Volume 433 . pp. 181-190. doi:10.1016/j.colsurfa.2013.05.005 ISSN 0927-7757.
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Official URL: http://dx.doi.org/10.1016/j.colsurfa.2013.05.005
Abstract
Electron beam lithography is a well-established tool suitable for the modification of substrate surface chemistry. It therefore follows that the deposition and self-assembly of nanoparticles on a surface can be directed using this method. This work explores the effect of electron dose on the electron beam lithographic patterning of self-assembled monolayers (SAMs) on gold surfaces. Electron beam irradiation of the sample induces conversion of the SAM terminal functional aromatic nitro (NO2) moieties to aromatic amino (NH2) moieties. The cationic NH2 functionalised regions direct the site-specific assembly of anionic citrate-passivated gold nanoparticles in aqueous solution at pH 4.5. Control of nanoparticle attachment to the SAM is demonstrated over the exposure range 5000-125,000 mu C/cm(2). Overexposure led to significant numbers of secondary electrons reaching the surface, causing conversion of functional aromatic moieties outside of the regions irradiated, which reduced feature quality and regional selectivity of adsorption.
Item Type: | Journal Article | ||||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||||
Journal or Publication Title: | Colloids and Surfaces A: Physicochemical and Engineering Aspects | ||||||||||
Publisher: | Elsevier BV | ||||||||||
ISSN: | 0927-7757 | ||||||||||
Official Date: | 20 September 2013 | ||||||||||
Dates: |
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Volume: | Volume 433 | ||||||||||
Page Range: | pp. 181-190 | ||||||||||
DOI: | 10.1016/j.colsurfa.2013.05.005 | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Restricted or Subscription Access |
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