研究目的
Investigating the mechanisms of hot-carrier generation, transport, and injection in plasmonic nanoparticles, and their role in chemical reactions, to aid in the rational design of plasmonic photocatalysts.
研究成果
The study demonstrates the potential of single-particle and single-molecule techniques to uncover the mechanisms of plasmon-induced chemical reactions, offering insights into the design of efficient plasmonic photocatalysts. The findings highlight the importance of understanding hot-carrier generation, transport, and injection processes for advancing plasmonic photocatalysis.
研究不足
Technical constraints include the need for precise control over experimental conditions to isolate hot-carrier effects from thermal and near-field contributions. Application constraints involve the complexity of extending single-particle and single-molecule studies to practical, large-scale photocatalytic systems.
1：Experimental Design and Method Selection:
Combination of dark-field microscopy and photo-electrochemistry to track hot-hole driven reactions; nanoscopy techniques for imaging hot-electron reactivity with sub-particle spatial resolution; search for hot-electron induced chemical reactions generating fluorescent products.
2：Sample Selection and Data Sources:
Au nanoparticles for hot-hole driven reactions; Au trimer nanorods for hot-electron reactivity mapping; Ag spherical nanoparticles for hot-electron driven reduction of Resazurin into Resorufin.
3：List of Experimental Equipment and Materials:
Dark-field microscope, potentiostat, three-electrodes cell configuration, femtosecond pulsed-laser, fluorescence microscopy setup.
4：Experimental Procedures and Operational Workflow:
Electrochemical control combined with optical measurements; single-particle femtosecond illumination for hot-electron reactivity mapping; ensemble-level fluorescence measurements for photocatalysis study.
5：Data Analysis Methods:
Optical changes tracking through scattering spectra; super-resolution data processing and image analysis for nanoscopy techniques; fluorescence spectra analysis for photocatalysis study.
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Potentiostat
CHI760C
CH Instruments
Used for electrochemical measurements.
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Femtosecond pulsed-laser
PHAROS
Light Conversion Ltd.
Used for femtosecond pulsed-laser irradiation of individual gold trimer nanorods.
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Fluorescence microscopy setup
Nikon Eclipse Ti?U
Nikon Instruments
Used for fluorescence imaging.
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UV-Vis spectrometer
Cary 60
Agilent Technologies
Used for measuring absorption spectra.
Cary 60 UV-Vis Spectrophotometer
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Spectrophotometer
Cary Eclipse
Agilent Technologies
Used for measuring fluorescence spectra.
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Dark-field microscope
Not specified
Zeiss
Used for optical measurements and to localize and track changes at the single particle level.
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EMCCD camera
Evolve 512 Delta
Photometrics
Used for collecting fluorescence light.
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