Single Laser Pulse Effects on Suspended-Au-Nanoparticle Size Distributions and Morphology

Cavicchi, Richard E.; Meier, Douglas C.; Presser, Cary; Prabhu, Vivek M.; Guha, Sudipto

doi:10.1021/jp4041502

Cited by 33 publications

(24 citation statements)

References 75 publications

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“…They do observe a minimum fluence threshold at a NP diameter of 60 nm, in agreement with our numerical predictions (see Fig.6 and Fig.9c). The occurrence of a non-monotonic shape of F s (a) with a minimum at 60 nm is also supported by the results of Cavicchi et al, 42 who investigated nanoparticle reshaping dependence on laser fluence.…”

Section: Discussionsupporting

confidence: 64%

Fluence Threshold for Photothermal Bubble Generation Using Plasmonic Nanoparticles

2015

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International audienceUnder nano- to femtosecond pulsed illumination at their plasmonic resonance wavelength, metalnanoparticles efficiently absorb the incident light energy that is subsequently converted into heat. In aliquid environment, with sufficiently high pulse fluences (light energy per unit area), this heat generationmay result in the local formation of a transient nanobubble. This phenomenon has been the subjectof a decade of investigations and is at the basis of numerous applications from cancer therapy to photoacouticimaging. The aim of this article is to clarify the question of the fluence threshold requiredfor bubble formation. Using a Runge-Kutta-4 numerical algorithm modeling the heat diffusion arounda spherical gold nanoparticle, we numerically investigate the influence of the nanoparticle diameter,pulse duration (from the femto- to the nanosecond range), wavelength and Kapitza resistivity in orderto explain the observations reported in the literature

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Section: Discussionsupporting

confidence: 64%

Fluence Threshold for Photothermal Bubble Generation Using Plasmonic Nanoparticles

2015

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“…investigated the effect of irradiation wavelength on 55 nm gold nanospheres and was mostly concerned with modeling the difference between interband and intraband excitation 22 . Another study used dynamic light scattering (DLS), electron microscopy and UV-Vis spectroscopy to examine the impact of a single laser pulse on particles of different sizes 26 . While results were presented for a range of energy levels, specific damage thresholds were not determined and comparison with theoretical results was not presented.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Evaluation of Nanosecond Pulsed Laser-Induced Photomodification of Plasmonic Gold Nanoparticles

Fales

Vogt

Pfefer

et al. 2017

Sci Rep

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The rapid growth of gold nanoparticle applications in laser therapeutics and diagnostics has brought about the need for establishing innovative standardized test methods for evaluation of safety and performance of these technologies and related medical products. Furthermore, given the incomplete and inconsistent data on nanoparticle photomodification thresholds provided in the literature, further elucidation of processes that impact the safety and effectiveness of laser-nanoparticle combination products is warranted. Therefore, we present a proof-of-concept study on an analytical experimental test methodology including three approaches (transmission electron microscopy, dynamic light scattering, and spectrophotometry) for experimental evaluation of damage thresholds in nanosecond pulsed laser-irradiated gold nanospheres, and compared our results with a theoretical model and prior studies. This thorough evaluation of damage threshold was performed based on irradiation with a 532 nm nanosecond-pulsed laser over a range of nanoparticle diameters from 20 to 100 nm. Experimentally determined damage thresholds were compared to a theoretical heat transfer model of pulsed laser-irradiated nanoparticles and found to be in reasonably good agreement, although some significant discrepancies with prior experimental studies were found. This study and resultant dataset represent an important foundation for developing a standardized test methodology for determination of laser-induced nanoparticle damage thresholds.

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“…Ongoing research issues in this context are the fabrication of highly effective nanoparticles, the durability of nanoparticles, and the mechanisms of nanoscale nucleation and enhanced (photo)catalytic reactions (Boulais, Lachaine, and Meunier, 2012;Carlson, Green, and Richardson, 2012;Cavicchi et al, 2013;. In particular, the plasmon enhanced solar to fuel conversion is extremely attractive (Thomann et al, 2011).…”

Section: E Plasmonic Bubbles and Vapor Nanobubblesmentioning

confidence: 99%

Surface nanobubbles and nanodroplets

2015

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Surface nanobubbles are nanoscopic gaseous domains on immersed substrates which can survive for days. They were first speculated to exist about 20 years ago, based on stepwise features in force curves between two hydrophobic surfaces, eventually leading to the first atomic force microscopy (AFM) image in 2000. While in the early years it was suspected that they may be an artifact caused by AFM, meanwhile their existence has been confirmed with various other methods, including through direct optical observation. Their existence seems to be paradoxical, as a simple classical estimate suggests that they should dissolve in microseconds, due to the large Laplace pressure inside these nanoscopic spherical-capshaped objects. Moreover, their contact angle (on the gas side) is much smaller than one would expect from macroscopic counterparts. This review will not only give an overview on surface nanobubbles, but also on surface nanodroplets, which are nanoscopic droplets (e.g., of oil) on (hydrophobic) substrates immersed in water, as they show similar properties and can easily be confused with surface nanobubbles and as they are produced in a similar way, namely, by a solvent exchange process, leading to local oversaturation of the water with gas or oil, respectively, and thus to nucleation. The review starts with how surface nanobubbles and nanodroplets can be made, how they can be observed (both individually and collectively), and what their properties are. Molecular dynamic simulations and theories to account for the long lifetime of the surface nanobubbles are then reported on. The crucial element contributing to the long lifetime of surface nanobubbles and nanodroplets is pinning of the three-phase contact line at chemical or geometric surface heterogeneities. The dynamical evolution of the surface nanobubbles then follows from the diffusion equation, Laplace's equation, and Henry's law. In particular, one obtains stable surface nanobubbles when the gas influx from the gas-oversaturated water and the outflux due to Laplace pressure balance. This is only possible for small enough surface bubbles. It is therefore the gas or oil oversaturation ζ that determines the contact angle of the surface nanobubble or nanodroplet and not the Young equation. The review also covers the potential technological relevance of surface nanobubbles and nanodroplets, namely, in flotation, in (photo)catalysis and electrolysis, in nanomaterial engineering, for transport in and out of nanofluidic devices, and for plasmonic bubbles, vapor nanobubbles, and energy conversion. Also given is a discussion on surface nanobubbles and nanodroplets in a nutshell, including theoretical predictions resulting from it and future directions. Studying the nucleation, growth, and dissolution dynamics of surface nanobubbles and nanodroplets will shed new light on the problems of contact line pinning and contact angle hysteresis on the submicron scale.

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Single Laser Pulse Effects on Suspended-Au-Nanoparticle Size Distributions and Morphology

Cited by 33 publications

References 75 publications

Fluence Threshold for Photothermal Bubble Generation Using Plasmonic Nanoparticles

Fluence Threshold for Photothermal Bubble Generation Using Plasmonic Nanoparticles

Quantitative Evaluation of Nanosecond Pulsed Laser-Induced Photomodification of Plasmonic Gold Nanoparticles

Surface nanobubbles and nanodroplets

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