Fluence Threshold for Photothermal Bubble Generation Using Plasmonic Nanoparticles

Metwally, Khaled; Mensah, Serge; Baffou, Guillaume

doi:10.1021/acs.jpcc.5b09903

Cited by 171 publications

(264 citation statements)

References 46 publications

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“…In the NP-water suspension, the laser thermally excites the suspended NPs at the SPR, which leads to volumetric heating of the volume irradiated by the laser beam [22][23][24][25][26] . The volumetric heating induces a thermo-capillary convective flow as schematically shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Light-Guided Surface Plasmonic Bubble Movement via Contact Line De-Pinning by In-Situ Deposited Plasmonic Nanoparticle Heating

Zhang

Pang

Schiffbauer

et al. 2019

ACS Appl. Mater. Interfaces

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Precise spatio-temporal control of surface bubble movement can benefit a wide range of applications like high-throughput drug screening, combinatorial material development, microfluidic logic, colloidal and molecular assembly, etc. In this work, we demonstrate that surface bubbles on a solid surface are directed by a laser to move at high speeds (> 1.8 mm/s), and we elucidate the mechanism to be the de-pinning of the three-phase contact line (TPCL) by rapid plasmonic heating of nanoparticles (NPs) deposited in-situ during bubble movement. Based on our observations, we deduce a stick-slip mechanism based on asymmetric fore-aft plasmonic heating: local evaporation at the front TPCL due to plasmonic heating de-pins and extends the front TPCL, 2 followed by the advancement of the trailing TPCL to resume a spherical bubble shape to minimize surface energy. The continuous TPCL drying during bubble movement also enables well-defined contact line deposition of NP clusters along the moving path. Our finding is beneficial to various microfluidics and pattern writing applications.

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Section: Resultsmentioning

confidence: 99%

Light-Guided Surface Plasmonic Bubble Movement via Contact Line De-Pinning by In-Situ Deposited Plasmonic Nanoparticle Heating

Zhang

Pang

Schiffbauer

et al. 2019

ACS Appl. Mater. Interfaces

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“…4 shows that some metallic nanodimers present strong phototaxis ( F // = 0). Therefore, illuminated nanodimers such as the AgAg (20,20) (for silversilver symmetrical homodimer of r 1 = r 2 = 20 nm) will not only present thermophoretic forces but they will also exhibit net velocity parallel to the direction of illumination.…”

Section: Resultsmentioning

confidence: 99%

“…Also noteworthy is that the nanodimer's force profile appears to be highly sensitive to Figure 6: Force spectra for symmetrical homodimers (left) and symmetrical heterodimers (right) made of NPs of silver (Ag), gold (Au) and copper (Cu), with r 1 = r 2 = 20 nm and gap = 5 nm. We used the maximum of the force spectrum of AgAg (20,20) to normalize the figures. the material.…”

Section: Homodimers and Heterodimersmentioning

confidence: 99%

Metallic Nanodimers as Phototactic Thermoplasmonic Nanoswimmers

Bertoni¹,

Passarelli²,

Bustos-Marún³

2019

Preprint

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We assess the potentiality of several geometries of metallic nanodimers (one of the simplest thermoplasmonic systems) as candidates for active particles (nanoswimmers) propelled and controlled by light (phototaxis). The studied nanodimers are formed by two spherical nanoparticles of gold, silver, or copper with radii ranging from 20 to 100 nm. Contrary to most proposals, which assume the asymmetry of the systems as a requirement for selfpropulsion, our results show that nanodimers made of identical nanoparticles are excellent candidates for phototactic self-thermophoretic systems.Nonsymmetrical nanodimers, although having a tunable effective diffusion, possess much lower or null average thermophoretic forces. We show that the effective diffusion and the net thermophoretic force in both types of systems depend strongly on the wavelength of the incident light, which makes these properties highly tunable. Our study may result useful for the design of simple-to-make but controllable self-propelled nanoparticles, which can find numerous applications.

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“…Heat transfer from NPs to the surrounding liquid induces formation of vapor bubbles around them [48]. It was shown that the threshold of formation of such vapor bubbles is close to the NPs fragmentation threshold and exhibit a "bathtub" profile as a function of the NPs diameter [49]. Therefore, more energy per pulse is required to produce smaller NPs by LFL.…”

Section: Laser Fragmentationmentioning

confidence: 99%

Laser-Ablative Synthesis of Isotope-Enriched Samarium Oxide Nanoparticles for Nuclear Nanomedicine

et al. 2019

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Nuclear nanomedicine is an emerging field, which utilizes nanoformulations of nuclear agents to increase their local concentration at targeted sites for a more effective nuclear therapy at a considerably reduced radiation dosage. This field needs the development of methods for controlled fabrication of nuclear agents carrying nanoparticles with low polydispersity and with high colloidal stability in aqueous dispersions. In this paper, we apply methods of femtosecond (fs) laser ablation in deionized water to fabricate stable aqueous dispersion of 152 Sm-enriched samarium oxide nanoparticles (NPs), which can capture neutrons to become 153 Sm beta-emitters for nuclear therapy. We show that direct ablation of a 152 Sm-enriched samarium oxide target leads to widely size-and shape-dispersed populations of NPs with low colloidal stability. However, by applying a second fs laser fragmentation step to the dispersion of initially formed colloids, we achieve full homogenization of NPs size characteristics, while keeping the same composition. We also demonstrate the possibility for wide-range tuning of the mean size of Sm-based NPs by varying laser energy during the ablation or fragmentation step. The final product presents dispersed solutions of samarium oxide NPs with relatively narrow size distribution, having spherical shape, a controlled mean size between 7 and 70 nm and high colloidal stability. The formed NPs can also be of importance for catalytic and biomedical applications.

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Fluence Threshold for Photothermal Bubble Generation Using Plasmonic Nanoparticles

Cited by 171 publications

References 46 publications

Light-Guided Surface Plasmonic Bubble Movement via Contact Line De-Pinning by In-Situ Deposited Plasmonic Nanoparticle Heating

Light-Guided Surface Plasmonic Bubble Movement via Contact Line De-Pinning by In-Situ Deposited Plasmonic Nanoparticle Heating

Metallic Nanodimers as Phototactic Thermoplasmonic Nanoswimmers

Laser-Ablative Synthesis of Isotope-Enriched Samarium Oxide Nanoparticles for Nuclear Nanomedicine

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