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Label-Free Imaging ...
Label-Free Imaging of Catalytic H 2 O 2 Decomposition on Single Colloidal Pt Nanoparticles Using Nanofluidic Scattering Microscopy
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- Altenburger, Björn, 1990 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Andersson, Carl, 1996 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Levin, Sune, 1991 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Westerlund, Fredrik, 1978 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Fritzsche, Joachim, 1977 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Langhammer, Christoph, 1978 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2023
- 2023
- Engelska.
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Ingår i: ACS Nano. - 1936-086X .- 1936-0851. ; 17:21, s. 21030-21043
- Relaterad länk:
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https://research.cha... (primary) (free)
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- Single-particle catalysis aims at determining factors that dictate the nanoparticle activity and selectivity. Existing methods often use fluorescent model reactions at low reactant concentrations, operate at low pressures, or rely on plasmonic enhancement effects. Hence, methods to measure single-nanoparticle activity under technically relevant conditions and without fluorescence or other enhancement mechanisms are still lacking. Here, we introduce nanofluidic scattering microscopy of catalytic reactions on single colloidal nanoparticles trapped inside nanofluidic channels to fill this gap. By detecting minuscule refractive index changes in a liquid flushed trough a nanochannel, we demonstrate that local H2O2 concentration changes in water can be accurately measured. Applying this principle, we analyze the H2O2 concentration profiles adjacent to single colloidal Pt nanoparticles during catalytic H2O2 decomposition into O2 and H2O and derive the particles’ individual turnover frequencies from the growth rate of the O2 gas bubbles formed in their respective nanochannel during reaction.
Ämnesord
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
Nyckelord
- nanofluidic scattering microscopy
- nanofluidics
- colloidal particles
- platinum
- label-free methods
- hydrogen peroxide decomposition
- single-nanoparticle catalysis
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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ACS Nano
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