Laser-induced reduction and in-situ optical spectroscopy of individual plasmonic copper nanoparticles for catalytic reactions

Copper (Cu) can provide an alternative to gold (Au) for the development of efficient, low-cost and low-loss plasmonic nanoparticles (NPs), as well as selective nanocatalysts. Unlike Au, the surface oxidation of Cu NPs can be an issue restricting their applicability. Here, we selectively reduce the C...

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Bibliographic Details
Published in:Applied physics letters 2017-02, Vol.110 (7)
Main Authors: Di Martino, G., Turek, V. A., Braeuninger-Weimer, P., Hofmann, S., Baumberg, J. J.
Format: Article
Language:English
Subjects:
Applied physics
Catalysis
Chemical vapor deposition
Copper
Gold
Nanoparticles
Organic chemistry
Oxidation
Reduction
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Summary:Copper (Cu) can provide an alternative to gold (Au) for the development of efficient, low-cost and low-loss plasmonic nanoparticles (NPs), as well as selective nanocatalysts. Unlike Au, the surface oxidation of Cu NPs can be an issue restricting their applicability. Here, we selectively reduce the Cu NPs by low power laser illumination in vacuum and use dark-field scattering to reveal in real time the optical signatures of the reduction process and its influence on the Cu NP plasmonic resonance. We then study reactive processes at the single particle level, using individual Cu catalyst nanoparticles for the selective laser-induced chemical vapour deposition of germanium nanostructures.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4976694