A nanofluidic device for parallel single nanoparticle catalysis in solution

Sune Levin, Joachim Fritzsche, Sara Nilsson, August Runemark, Bhausaheb Dhokale, Henrik Ström, Henrik Sundén, Christoph Langhammer () and Fredrik Westerlund ()
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Sune Levin: Chalmers University of Technology
Joachim Fritzsche: Chalmers University of Technology
Sara Nilsson: Chalmers University of Technology
August Runemark: Chalmers University of Technology
Bhausaheb Dhokale: Chalmers University of Technology
Henrik Ström: Chalmers University of Technology
Henrik Sundén: Chalmers University of Technology
Christoph Langhammer: Chalmers University of Technology
Fredrik Westerlund: Chalmers University of Technology

Nature Communications, 2019, vol. 10, issue 1, 1-8

Abstract: Abstract Studying single catalyst nanoparticles, during reaction, eliminates averaging effects that are an inherent limitation of ensemble experiments. It enables establishing structure–function correlations beyond averaged properties by including particle-specific descriptors such as defects, chemical heterogeneity and microstructure. Driven by these prospects, several single particle catalysis concepts have been implemented. However, they all have limitations such as low throughput, or that they require very low reactant concentrations and/or reaction rates. In response, we present a nanofluidic device for highly parallelized single nanoparticle catalysis in solution, based on fluorescence microscopy. Our device enables parallel scrutiny of tens of single nanoparticles, each isolated inside its own nanofluidic channel, and at tunable reaction conditions, ranging from the fully mass transport limited regime to the surface reaction limited regime. In a wider perspective, our concept provides a versatile platform for highly parallelized single particle catalysis in solution and constitutes a promising application area for nanofluidics.

Date: 2019
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DOI: 10.1038/s41467-019-12458-1

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