Spatial control of chemical processes on nanostructures through nano-localized water heating

Calum Jack, Affar S. Karimullah (), Ryan Tullius, Larousse Khosravi Khorashad, Marion Rodier, Brian Fitzpatrick, Laurence D. Barron, Nikolaj Gadegaard, Adrian J. Lapthorn, Vincent M. Rotello, Graeme Cooke, Alexander O. Govorov and Malcolm Kadodwala ()
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Calum Jack: School of Chemistry, University of Glasgow
Affar S. Karimullah: School of Chemistry, University of Glasgow
Ryan Tullius: School of Chemistry, University of Glasgow
Larousse Khosravi Khorashad: Ohio University
Marion Rodier: School of Chemistry, University of Glasgow
Brian Fitzpatrick: School of Chemistry, University of Glasgow
Laurence D. Barron: School of Chemistry, University of Glasgow
Nikolaj Gadegaard: School of Engineering, University of Glasgow
Adrian J. Lapthorn: School of Chemistry, University of Glasgow
Vincent M. Rotello: University of Massachusetts
Graeme Cooke: School of Chemistry, University of Glasgow
Alexander O. Govorov: Ohio University
Malcolm Kadodwala: School of Chemistry, University of Glasgow

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract Optimal performance of nanophotonic devices, including sensors and solar cells, requires maximizing the interaction between light and matter. This efficiency is optimized when active moieties are localized in areas where electromagnetic (EM) fields are confined. Confinement of matter in these ‘hotspots’ has previously been accomplished through inefficient ‘top-down’ methods. Here we report a rapid ‘bottom-up’ approach to functionalize selective regions of plasmonic nanostructures that uses nano-localized heating of the surrounding water induced by pulsed laser irradiation. This localized heating is exploited in a chemical protection/deprotection strategy to allow selective regions of a nanostructure to be chemically modified. As an exemplar, we use the strategy to enhance the biosensing capabilities of a chiral plasmonic substrate. This novel spatially selective functionalization strategy provides new opportunities for efficient high-throughput control of chemistry on the nanoscale over macroscopic areas for device fabrication.

Date: 2016
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DOI: 10.1038/ncomms10946

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