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Ezendam S, Gargiulo J, Sousa-Castillo A, Lee JB, Nam YS, Maier SA, Cortés E. Spatial Distributions of Single-Molecule Reactivity in Plasmonic Catalysis. ACS NANO 2024; 18:451-460. [PMID: 37971988 PMCID: PMC10786159 DOI: 10.1021/acsnano.3c07833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 11/19/2023]
Abstract
Plasmonic catalysts have the potential to accelerate and control chemical reactions with light by exploiting localized surface plasmon resonances. However, the mechanisms governing plasmonic catalysis are not simple to decouple. Several plasmon-derived phenomena, such as electromagnetic field enhancements, temperature, or the generation of charge carriers, can affect the reactivity of the system. These effects are convoluted with the inherent (nonplasmonic) catalytic properties of the metal surface. Disentangling these coexisting effects is challenging but is the key to rationally controlling reaction pathways and enhancing reaction rates. This study utilizes super-resolution fluorescence microscopy to examine the mechanisms of plasmonic catalysis at the single-particle level. The reduction reaction of resazurin to resorufin in the presence of Au nanorods coated with a porous silica shell is investigated in situ. This allows the determination of reaction rates with a single-molecule sensitivity and subparticle resolution. By variation of the irradiation wavelength, it is possible to examine two different regimes: photoexcitation of the reactant molecules and photoexcitation of the nanoparticle's plasmon resonance. In addition, the measured spatial distribution of reactivity allows differentiation between superficial and far-field effects. Our results indicate that the reduction of resazurin can occur through more than one reaction pathway, being most efficient when the reactant is photoexcited and is in contact with the Au surface. In addition, it was found that the spatial distribution of enhancements varies, depending on the underlying mechanism. These findings contribute to the fundamental understanding of plasmonic catalysis and the rational design of future plasmonic nanocatalysts.
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Affiliation(s)
- Simone Ezendam
- Nanoinstitute
Munich, Faculty of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
| | - Julian Gargiulo
- Nanoinstitute
Munich, Faculty of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
| | - Ana Sousa-Castillo
- Nanoinstitute
Munich, Faculty of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
| | - Joong Bum Lee
- Department
of Materials Science and Engineering, Korea
Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Yoon Sung Nam
- Department
of Materials Science and Engineering, Korea
Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Stefan A. Maier
- Nanoinstitute
Munich, Faculty of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
- Department
of Physics, Imperial College London, London SW7 2AZ, United Kingdom
- School
of Physics and Astronomy, Monash University, Clayton, Victoria 3800, Australia
| | - Emiliano Cortés
- Nanoinstitute
Munich, Faculty of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
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Precek M, Kubelik P, Vysin L, Schmidhammer U, Larbre JP, Demarque A, Jeunesse P, Mostafavi M, Juha L. Dose Rate Effects in Fluorescence Chemical Dosimeters Exposed to Picosecond Electron Pulses: An Accurate Measurement of Low Doses at High Dose Rates. Radiat Res 2022; 197:131-148. [PMID: 34614193 DOI: 10.1667/rade-20-00292.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 09/07/2021] [Indexed: 11/03/2022]
Abstract
The development of ultra-intense electron pulse for applications needs to be accompanied by the implementation of a practical dosimetry system. In this study four different systems were investigated as dosimeters for low doses with a very high-dose-rate source. First, the effects of ultra-short pulses were investigated for the yields of the Fricke dosimeter based on acidic solutions of ferrous sulfate; it was established that the yields were not significantly affected by the high dose rates, so the Fricke dosimeter system was used as a reference. Then, aqueous solutions of three compounds as fluorescence chemical dosimeters were utilized, each operated at a different solution pH: terephthalic acid - basic, trimesic acid - acidic, and coumarin-3-carboxylic acid (C3CA) - neutral. Fluorescence chemical dosimeters offer an attractive alternative to chemical dosimeters based on optical absorption for measuring biologically relevant low doses because of their higher sensitivity. The effects of very intense dose rate (TGy/ s) from pulses of fast electrons generated by a picosecond linear accelerator on the chemical yields of fluorescence chemical dosimeters were investigated at low peak doses (<20 Gy) and compared with yields determined under low-dose-rate irradiation from a 60 Co gamma-ray source (mGy/s). For the terephthalate and the trimesic acid dosimeters changes in the yields were not detected within the estimated (∼10%) precision of the experiments, but, due to the complexity of the mechanism of the hydroxyl radical initiated reactions in solutions of the relevant aromatic compounds, significant reductions of the chemical yield (-60%) were observed when the C3CA dosimeter was irradiated with the ultra-short pulses.
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Affiliation(s)
- Martin Precek
- ELI Beamlines, Institute of Physics, Czech Academy of Sciences, Za Radnicí 835, 252 41 Dolní Břežany, Czech Republic
- Department of Radiation and Chemical Physics, Institute of Physics, Czech Academy of Sciences, Na Slovance 1999/2, 18221 Prague, Czech Republic
| | - Petr Kubelik
- Department of Radiation and Chemical Physics, Institute of Physics, Czech Academy of Sciences, Na Slovance 1999/2, 18221 Prague, Czech Republic
- Department of Spectroscopy, J. Heyrovsky Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Prague 8, Czech Republic
| | - Ludek Vysin
- Department of Radiation and Chemical Physics, Institute of Physics, Czech Academy of Sciences, Na Slovance 1999/2, 18221 Prague, Czech Republic
| | - Uli Schmidhammer
- Institut de Chimie Physique/ELYSE, CNRS UMR 8000, Université Paris-Saclay, 91400 Orsay, France
| | - Jean-Philippe Larbre
- Institut de Chimie Physique/ELYSE, CNRS UMR 8000, Université Paris-Saclay, 91400 Orsay, France
| | - Alexandre Demarque
- Institut de Chimie Physique/ELYSE, CNRS UMR 8000, Université Paris-Saclay, 91400 Orsay, France
| | - Pierre Jeunesse
- Institut de Chimie Physique/ELYSE, CNRS UMR 8000, Université Paris-Saclay, 91400 Orsay, France
| | - Mehran Mostafavi
- Institut de Chimie Physique/ELYSE, CNRS UMR 8000, Université Paris-Saclay, 91400 Orsay, France
| | - Libor Juha
- Department of Radiation and Chemical Physics, Institute of Physics, Czech Academy of Sciences, Na Slovance 1999/2, 18221 Prague, Czech Republic
- Laser Plasma Department, Institute of Plasma Physics, Czech Academy of Sciences, Za Slovankou 1782/3, 18200 Prague, Czech Republic
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Baldacchino G, Brun E, Denden I, Bouhadoun S, Roux R, Khodja H, Sicard-Roselli C. Importance of radiolytic reactions during high-LET irradiation modalities: LET effect, role of O2 and radiosensitization by nanoparticles. Cancer Nanotechnol 2019. [DOI: 10.1186/s12645-019-0047-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Chen G, Zou N, Chen B, Sambur JB, Choudhary E, Chen P. Bimetallic Effect of Single Nanocatalysts Visualized by Super-Resolution Catalysis Imaging. ACS CENTRAL SCIENCE 2017; 3:1189-1197. [PMID: 29202021 PMCID: PMC5704284 DOI: 10.1021/acscentsci.7b00377] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Indexed: 05/29/2023]
Abstract
Compared with their monometallic counterparts, bimetallic nanoparticles often show enhanced catalytic activity associated with the bimetallic interface. Direct quantitation of catalytic activity at the bimetallic interface is important for understanding the enhancement mechanism, but challenging experimentally. Here using single-molecule super-resolution catalysis imaging in correlation with electron microscopy, we report the first quantitative visualization of enhanced bimetallic activity within single bimetallic nanoparticles. We focus on heteronuclear bimetallic PdAu nanoparticles that present a well-defined Pd-Au bimetallic interface in catalyzing a photodriven fluorogenic disproportionation reaction. Our approach also enables a direct comparison between the bimetallic and monometallic regions within the same nanoparticle. Theoretical calculations further provide insights into the electronic nature of N-O bond activation of the reactant (resazurin) adsorbed on bimetallic sites. Subparticle activity correlation between bimetallic enhancement and monometallic activity suggests that the favorable locations to construct bimetallic sites are those monometallic sites with higher activity, leading to a strategy for making effective bimetallic nanocatalysts. The results highlight the power of super-resolution catalysis imaging in gaining insights that could help improve nanocatalysts.
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Takeshita T, Kurata H, Hara M. Improvement of photoionization efficiency of diarylethene-cyclodextrin complexes by using multi-laser pulse excitation. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.04.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Liu L, Guo J, Li Z, Wei J. Photobase generating monomers: synthesis, evaluation and utilization for fabricating fluorescence patterns. RSC Adv 2014. [DOI: 10.1039/c4ra00499j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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