Accumulating microparticles and direct-writing micropatterns using a continuous-wave laser-induced vapor bubble

Zheng, Yilin; Liu, Hui; Wang, Yi; Zhu, Cheng‐Ye; Wang, Shuming; Cao, Jingxiao; Zhu, Shining

doi:10.1039/c1lc20478e

Cited by 87 publications

(123 citation statements)

References 25 publications

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“…For isolated Au NPs, bubbles are produced from Plasmonic hot-electron transfer and nanofabrication A Furube and S Hashimoto superheated water at particle temperatures of 500-550 K. 60 The ability of microbubbles to collect and displace molecules and colloids provides an opportunity to assemble small-scale structures if their positions are properly controlled. 61 Third, we refer to the action of a strongly enhanced electric field formed around plasmonic NPs under photoillumination through twophoton or multi-photon absorption, resulting in designed structures. 62 Remarkably, high-power femtosecond lasers produce unusual geometrical constructions, which we highlight below.…”

Section: Optically Driven Plasmonic Nanofabricationmentioning

confidence: 99%

Insight into plasmonic hot-electron transfer and plasmon molecular drive: new dimensions in energy conversion and nanofabrication

2017

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Localized surface plasmon resonance (LSPR) of plasmonic nanoparticles and nanostructures has attracted wide attention because the nanoparticles exhibit a strong near-field enhancement through interaction with visible light, enabling subwavelength optics and sensing at the single-molecule level. The extremely fast LSPR decays have raised doubts that such nanoparticles have use in photochemistry and energy storage. Recent studies have demonstrated the capability of such plasmonic systems in producing LSPR-induced hot electrons that are useful in energy conversion and storage when combined with electron-accepting semiconductors. Due to the femtosecond timescale, hot-electron transfer is under intense investigation to promote ongoing applications in photovoltaics and photocatalysis. Concurrently, hot-electron decay results in photothermal responses or plasmonic heating. Importantly, this heating has received renewed interest in photothermal manipulation, despite the developments in optical manipulation using optical forces to move and position nanoparticles and molecules guided by plasmonic nanostructures. To realize plasmonic heating-based manipulation, photothermally generated flows, such as thermophoresis, the Marangoni effect and thermal convection, are exploited. Plasmon-enhanced optical tweezers together with plasmon-induced heating show potential as an ultimate bottom-up method for fabricating nanomaterials. We review recent progress in two fascinating areas: solar energy conversion through interfacial electron transfer in gold-semiconductor composite materials and plasmon-induced nanofabrication.

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Section: Optically Driven Plasmonic Nanofabricationmentioning

confidence: 99%

Insight into plasmonic hot-electron transfer and plasmon molecular drive: new dimensions in energy conversion and nanofabrication

2017

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“…Similar to the later case, we expect that convection currents will impact in some degree the velocities along the fiber axis at high optical powers.Motion at high optical powers. It has been well documented that when the optical power output is high enough, strong convective currents appear and heating of the absorbing particles can produce microbubbles in the liquid; this bubbles, in turn, migrate towards the light source by thermocapillary flow at the gas-liquid interface and are implicated in the deposition of particles on the surface of the light source [46][47][48]. This short section supports these experimental results and discards any contribution from phoretic transport in the deposition of nanoparticles (in fact, radiative pressure keeps away the nanotubes from the fiber tip, as we saw in the experiments).Figure 7ashows a bubble attached to the fiber tip (109mW).…”

mentioning

confidence: 99%

On the Motion of Carbon Nanotube Clusters near Optical Fiber Tips: Thermophoresis, Radiative Pressure, and Convection Effects

Vélez-Cordero

Hernández‐Cordero

2015

Langmuir

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We analyze the motion of multiwalled carbon nanotubes clusters in water or ethanol upon irradiation with a 975 and 1550 nm laser beam guided by an optical fiber. Upon measuring the velocities of the nanotube clusters in and out of the laser beam cone, we were able to identify thermophoresis, convection and radiation pressure as the main driving forces that determine the equilibrium position of the dispersion at low optical powers: while thermophoresis and convection pull the clusters toward the laser beam axis (negative Soret coefficient), radiation pressure pushes the clusters away from the fiber tip. A theoretical solution for the thermophoretic velocity, which considers interfacial motion and a repulsive potential interaction between the nanotubes and the solvent (hydrophobic interaction), shows that the main mechanism implicated in this type of thermophoresis is the thermal expansion of the fluid, and that the clusters migrate to hotter regions with a characteristic thermal diffusion coefficient D(T) of 9 × 10(-7) cm(2) K(-1) s(-1). We further show that the characteristic length associated with thermophoresis is not that of the nanotube clusters size, O(1) μm, but that corresponding to the microstructure of the clusters, O(1) nm. We finally discuss the role of the formation of gas-liquid interfaces (microbubbles) at high optical powers on the deposition of carbon nanotubes on the optical fiber end faces.

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“…Actually, the bubble can be regarded as an inverse structure of droplet, which can be used as a tunable microlenses. 17,18 Secondly, the vapor bubble can be used as a bubble valve, which can be applied to controlling microfluids in channels or biochips [19][20][21] Another useful application reported recently by us, 22 is to manipulating the microparticles with the laser induced bubble. The microparticles can be attracted to bubble through strong convection flow.…”

confidence: 99%

Size control of vapor bubbles on a silver film by a tuned CW laser

et al. 2012

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A vapor bubble is created by a weakly focused continuous-wave (CW) laser beam on the surface of a silver film. The temporal dynamics of the bubble is experimentally investigated with a tuned incident laser. The expansion and contraction rates of the vapor bubble are determined by the laser power. The diameter of the vapor bubble can be well controlled through tuning the laser power. A theory model is given to explain the underlying physics in the process. The method reported will have some interesting applications in micro-fluidics and bio-techniques

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Accumulating microparticles and direct-writing micropatterns using a continuous-wave laser-induced vapor bubble

Cited by 87 publications

References 25 publications

Insight into plasmonic hot-electron transfer and plasmon molecular drive: new dimensions in energy conversion and nanofabrication

Insight into plasmonic hot-electron transfer and plasmon molecular drive: new dimensions in energy conversion and nanofabrication

On the Motion of Carbon Nanotube Clusters near Optical Fiber Tips: Thermophoresis, Radiative Pressure, and Convection Effects

Size control of vapor bubbles on a silver film by a tuned CW laser

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