Erratum: Photochemical transformations on plasmonic metal nanoparticles

Linic, Suljo; Aslam, Umar; Boerigter, Calvin; Morabito, Matthew

doi:10.1038/nmat4329

Cited by 20 publications

(14 citation statements)

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“…After light absorption and SPR excitation, plasmons can decay radiatively through re‐emitted photons or non‐radiatively by formation of hot electrons . The hot electron, generated either by plasmon decay or interband excitations, can induce photochemical transformations either through localized heating of the nanostructures or by energetic charge transfer to the reactants adsorbed on the surface of the NPs . Therefore, another promising use of plasmonic nanostructures centers on recently demonstrated direct SPR‐induced photocatalysis on excited plasmonic metal NPs…”

Section: Figurementioning

confidence: 99%

Nanoplasmonic Photoluminescence Spectroscopy at Single‐Particle Level: Sensing for Ethanol Oxidation

Zheng

Majima

2016

Angewandte Chemie

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Surface plasmon resonances of metal nanoparticles have shown significant promise for the use of solar energy to drive catalytic chemical reactions.M ore importantly,u nderstanding and monitoring such catalytic reactions at singlenanoparticle level is crucial for the study of local reaction processes.H erein, using plasmonic photoluminescence (PL) spectroscopy, we describe anovel sensing method for catalytic ethanol oxidation reactions at the single-nanoparticle level. The Au nanorod monitors the interfacial interaction with ethanol during the catalytic reaction through the PL intensity changes in the single-particle PL spectra. The analysis of energy relaxation of excited electron-hole pairs indicates the relationship between the PL quenching and ethanol oxidation reaction on the single Au nanorod.

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Section: Figurementioning

confidence: 99%

Nanoplasmonic Photoluminescence Spectroscopy at Single‐Particle Level: Sensing for Ethanol Oxidation

Zheng

Majima

2016

Angewandte Chemie

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“…Metal nanoparticles and the response to light are extensively investigated for applications in photothermal therapy, [ 1,2 ] photovoltaics, [ 3 ] photocatalysis, [ 4–8 ] photonic nano‐welding, [ 9,10 ] and nano‐structuring [ 11,12 ] for their intriguing properties such as strong plasmonic absorption and scattering, [ 13 ] hot carrier generation and separation, [ 14 ] surface‐plasmon driven photochemistry, [ 15 ] and photothermal heating and phase change. [ 16 ] In these processes, lights are converted into various forms of energy to drive electron transfer, chemical reaction, and heating and structure transformation.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast, Non‐Equilibrium and Transient Heating and Sintering of Nanocrystals for Nanoscale Metal Printing

Podder

Gong

Pan

2021

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The carrier excitation, relaxation, energy transport, and conversion processes during light‐nanocrystal (NC) interactions have been intensively investigated for applications in optoelectronics, photocatalysis, and photovoltaics. However, there are limited studies on the non‐equilibrium heating under relatively high laser excitation that leads to NCs sintering. Here, the authors use femtosecond laser two‐pulse correlation and in‐situ optical transmission probing to investigate the non‐equilibrium heating of NCs and transient sintering dynamics. First, a two‐pulse correlation study reveals that the sintering rate strongly increases when the two heating laser pulses are temporally separated by <10 ps. Second, the sintering rate is found to increase nonlinearly with laser fluence when heating with ≈700 fs laser pulses. By three‐temperature modeling, the NC sintering mechanism mediated by electron induced ligand transformation is suggested. The ultrafast and non‐equilibrium process facilitates sintering in dry (spin‐coated) and wet (solvent suspended) environments. The nonlinear dependence of sintering rate on laser fluence is exploited to print sub‐diffraction‐limited features in NC suspension. The smallest feature printed is ≈200 nm, which is ≈¼ of the laser wavelength. These findings provide a new perspective toward nanomanufacturing development based on probing and engineering ultrafast transport phenomena in functional NCs.

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“…However, these photophysical relaxation processes are still not well understood at either the ensemble or the single nanoparticle level, especially in hybrid metal/semiconductor systems where the plasmon resonance at least partially overlaps with the band gap of the semiconductor. Plasmon generation of hot free carriers in adjacent semiconductors is well established, , and explaining the ultrafast transient dynamics of these systems is important to the development of various technologies. − This is because plasmon resonances can induce hot electron transfer from metal to the semiconductor, effectively circumventing the energy loss mechanisms of the metal and donating that energy to the semiconductor for solar energy conversion or photocatalysis. , We hypothesized that ultrafast carrier dynamics occurring at the metal–semiconductor interface leaves some “fingerprint” or “residue” on the slower processes such as optomechanical modes. Comparing both fast and slow processes should reveal information on the total flow of energy in metal–semiconductor systems.…”

Section: Introductionmentioning

confidence: 99%

Hot Electron Emission Can Lead to Damping of Optomechanical Modes in Core–Shell Ag@TiO₂ Nanocubes

et al. 2017

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Interactions between light and metal nanostructures are mediated by collective excitations of free electrons called surface plasmons, which depend primarily on geometry and dielectric environment. Excitation with ultrafast pulses can excite optomechanical modes that modulate the volume and shape of nanostructures at gigahertz frequencies. Plasmons serve as an optical handle to study the ultrafast electronic dynamics of nanoscale systems. We describe a method to synthesize core–shell Ag@TiO2 nanocubeswhile successfully maintaining the size and shape of the nanocube. Transient absorbance spectroscopy (TAS) is used to track photophysical processes on multiple time scales: from the ultrafast creation of hot carriers to their decay into phonons and the formation of optomechanical modes. Surprisingly, the TiO2 shell surrounding the Ag nanocubes caused no appreciable change in the frequency of the optomechanical mode, indicating that mechanical coupling between the core and shell is weak. However, the optomechanical mode was strongly attenuated by the TiO2 shell and TAS decay at ultrafast time scales (0–5 ps) was much faster. This observation suggests that up to ∼36% of the energy coupled into the plasmon resonance is being lost to the TiO2 as hot carriers instead of coupling to the optomechanical mode. Analysis of both ultrafast decay and characterization of optomechanical modes provides a dual accounting method to track energy dissipation in hybrid metal–semiconductor nanosystems for plasmon-enhanced solar energy conversion and chemical fuel generation.

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Erratum: Photochemical transformations on plasmonic metal nanoparticles

Cited by 20 publications

References 1 publication

Nanoplasmonic Photoluminescence Spectroscopy at Single‐Particle Level: Sensing for Ethanol Oxidation

Nanoplasmonic Photoluminescence Spectroscopy at Single‐Particle Level: Sensing for Ethanol Oxidation

Ultrafast, Non‐Equilibrium and Transient Heating and Sintering of Nanocrystals for Nanoscale Metal Printing

Hot Electron Emission Can Lead to Damping of Optomechanical Modes in Core–Shell Ag@TiO₂ Nanocubes

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Erratum: Photochemical transformations on plasmonic metal nanoparticles

Cited by 20 publications

References 1 publication

Nanoplasmonic Photoluminescence Spectroscopy at Single‐Particle Level: Sensing for Ethanol Oxidation

Nanoplasmonic Photoluminescence Spectroscopy at Single‐Particle Level: Sensing for Ethanol Oxidation

Ultrafast, Non‐Equilibrium and Transient Heating and Sintering of Nanocrystals for Nanoscale Metal Printing

Hot Electron Emission Can Lead to Damping of Optomechanical Modes in Core–Shell Ag@TiO2 Nanocubes

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Hot Electron Emission Can Lead to Damping of Optomechanical Modes in Core–Shell Ag@TiO₂ Nanocubes