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Label-Free Imaging of Catalytic H(2)O(2) Decomposition on Single Colloidal Pt Nanoparticles Using Nanofluidic Scattering Microscopy
[Image: see text] 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...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2023
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10655234/ https://www.ncbi.nlm.nih.gov/pubmed/37847543 http://dx.doi.org/10.1021/acsnano.3c03977 |
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author | Altenburger, Björn Andersson, Carl Levin, Sune Westerlund, Fredrik Fritzsche, Joachim Langhammer, Christoph |
author_facet | Altenburger, Björn Andersson, Carl Levin, Sune Westerlund, Fredrik Fritzsche, Joachim Langhammer, Christoph |
author_sort | Altenburger, Björn |
collection | PubMed |
description | [Image: see text] 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 H(2)O(2) concentration changes in water can be accurately measured. Applying this principle, we analyze the H(2)O(2) concentration profiles adjacent to single colloidal Pt nanoparticles during catalytic H(2)O(2) decomposition into O(2) and H(2)O and derive the particles’ individual turnover frequencies from the growth rate of the O(2) gas bubbles formed in their respective nanochannel during reaction. |
format | Online Article Text |
id | pubmed-10655234 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-106552342023-11-17 Label-Free Imaging of Catalytic H(2)O(2) Decomposition on Single Colloidal Pt Nanoparticles Using Nanofluidic Scattering Microscopy Altenburger, Björn Andersson, Carl Levin, Sune Westerlund, Fredrik Fritzsche, Joachim Langhammer, Christoph ACS Nano [Image: see text] 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 H(2)O(2) concentration changes in water can be accurately measured. Applying this principle, we analyze the H(2)O(2) concentration profiles adjacent to single colloidal Pt nanoparticles during catalytic H(2)O(2) decomposition into O(2) and H(2)O and derive the particles’ individual turnover frequencies from the growth rate of the O(2) gas bubbles formed in their respective nanochannel during reaction. American Chemical Society 2023-10-17 /pmc/articles/PMC10655234/ /pubmed/37847543 http://dx.doi.org/10.1021/acsnano.3c03977 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Altenburger, Björn Andersson, Carl Levin, Sune Westerlund, Fredrik Fritzsche, Joachim Langhammer, Christoph Label-Free Imaging of Catalytic H(2)O(2) Decomposition on Single Colloidal Pt Nanoparticles Using Nanofluidic Scattering Microscopy |
title | Label-Free Imaging
of Catalytic H(2)O(2) Decomposition on Single Colloidal
Pt Nanoparticles Using
Nanofluidic Scattering Microscopy |
title_full | Label-Free Imaging
of Catalytic H(2)O(2) Decomposition on Single Colloidal
Pt Nanoparticles Using
Nanofluidic Scattering Microscopy |
title_fullStr | Label-Free Imaging
of Catalytic H(2)O(2) Decomposition on Single Colloidal
Pt Nanoparticles Using
Nanofluidic Scattering Microscopy |
title_full_unstemmed | Label-Free Imaging
of Catalytic H(2)O(2) Decomposition on Single Colloidal
Pt Nanoparticles Using
Nanofluidic Scattering Microscopy |
title_short | Label-Free Imaging
of Catalytic H(2)O(2) Decomposition on Single Colloidal
Pt Nanoparticles Using
Nanofluidic Scattering Microscopy |
title_sort | label-free imaging
of catalytic h(2)o(2) decomposition on single colloidal
pt nanoparticles using
nanofluidic scattering microscopy |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10655234/ https://www.ncbi.nlm.nih.gov/pubmed/37847543 http://dx.doi.org/10.1021/acsnano.3c03977 |
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