Laser streaming: Turning a laser beam into a flow of liquid

Wang, Yanan; Zhang, Qiuhui; Zhu, Zhuan; Lin, Feng; Deng, Jiangdong; Ku, Geng; Dong, Suchuan; Song, Shuo; Alam, Kamrul; Liu, Dong; Wang, Zhiming; Bao, Jiming

doi:10.1126/sciadv.1700555

Cited by 50 publications

(47 citation statements)

References 46 publications

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“…Pulsed light can excite coherent phonons and induce lattice expansion and contraction during the propagation of the acoustic wave ( 19 ). The pulsed light–induced acoustic wave has been used for many applications in optofluidics ( 20 ) and bioimaging ( 21 ). Besides, the surface acoustic wave (e.g., Rayleigh wave) can be generated on the surface of the light-absorbing film when the pulsed laser is focused as a line on the surface ( 22 ).…”

Section: Resultsmentioning

confidence: 99%

Nanoscale Lamb wave–driven motors in nonliquid environments

Qiu

et al. 2019

Sci. Adv.

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Achieving light-driven motions in nonliquid environments presents formidable challenges, because microsized objects experience strong dry adhesion and intend to be stuck to contact surfaces with great tenacity. Here, in air and vacuum, we show rotary locomotion of a micrometer-sized metal plate with ~30 nm thickness, revolving around a microfiber. This motor is powered by pulsed light guided into the fiber as a coordinated consequence of an optically excited Lamb wave on the plate and favorable configuration of plate-fiber geometry. The motor, actuated by designed light pulses, crawls stepwise with subnanometer locomotion resolution. Furthermore, we can control the rotation velocity and step resolution by varying the repetition rate and pulse power, respectively. A light-actuated micromirror scanning with 0.001° resolution is then demonstrated on the basis of this motor. It offers unprecedented application potential for integrated micro-opto-electromechanical systems, outer-space all-optical precision mechanics and controls, and laser scanning for miniature lidar systems.

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Section: Resultsmentioning

confidence: 99%

Nanoscale Lamb wave–driven motors in nonliquid environments

Qiu

et al. 2019

Sci. Adv.

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“…The interaction between light and matter in liquids is a field of study that is vital for the advancement of biomedical [1][2][3][4][5] and optical sensing applications [6][7][8][9][10][11][12] . Nanoparticles are especially useful for studying light-matter interactions due to their properties that differ from their macroscopic source.…”

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confidence: 99%

“…Nanoparticles are especially useful for studying light-matter interactions due to their properties that differ from their macroscopic source. For example, Wang et al, used gold nanoparticles to induce a high-speed liquid flow by inducing an ultrasonic photoacoustic effect using a pulsed laser 11 . With metal nanoparticles, laser pulses have been used to manipulate particles for controlled transport 12 , allowing for localized light absorption for photothermal applications.…”

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confidence: 99%

Multi-pulse laser-induced bubble formation and nanoparticle aggregation using MoS2 nanoparticles

Lü

Sokolov

et al. 2020

Sci Rep

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Understanding of how particles and light interact in a liquid environment is vital for optical and biological applications. MoS2 has been shown to enhance nonlinear optical phenomena due to the presence of a direct excitonic resonance. Its use in biological applications is predicated on knowledge of how MoS2 interacts with ultrafast (< 1 ps) pulses. In this experiment, the interaction between two femtosecond pulses and MoS2 nanoparticles suspended in liquid is studied. We found that the laser pulses induce bubble formation on the surface of a nanoparticle and a nanoparticle aggregate then forms on the surface of the trapped bubble. The processes of formation of the bubble and the nanoparticle aggregation are intertwined.

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“…To circumvent the disadvantages of using bubbles, it is possible to acoustically excite microposts or micropillars in their place to induce microstreaming flows, although the other disadvantages associated with such systems remain. More recently, optical excitation of a suspension of plasmonic nanoparticles as a means to generate sound waves in the liquid via rapid expansion and contraction of both the nanoparticles and the surrounding liquid media in what is known as the photoacoustic effect, in combination with the simultaneous creation of a plasmonic–acoustic cavity due to the ablation of the nanoparticles, was demonstrated to give rise to acoustic streaming …”

Section: Active Actuationmentioning

confidence: 99%

On‐Chip Generation of Vortical Flows for Microfluidic Centrifugation

Ahmed

Ramesan

Lee

et al. 2019

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Microcentrifugation constitutes an important part of the microfluidic toolkit in a similar way that centrifugation is crucial to many macroscopic procedures, given that micromixing, sample preconcentration, particle separation, component fractionation, and cell agglomeration are essential operations in small scale processes. Yet, the dominance of capillary and viscous effects, which typically tend to retard flow, over inertial and gravitational forces, which are often useful for actuating flows and hence centrifugation, at microscopic scales makes it difficult to generate rotational flows at these dimensions, let alone with sufficient vorticity to support efficient mixing, separation, concentration, or aggregation. Herein, the various technologies—both passive and active—that have been developed to date for vortex generation in microfluidic devices are reviewed. Various advantages or limitations associated with each are outlined, in addition to highlighting the challenges that need to be overcome for their incorporation into integrated microfluidic devices.

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Laser streaming: Turning a laser beam into a flow of liquid

Abstract: New optofluidic coupling of photoacoustics to acoustic streaming enables laser-driven jet flow via plasmonic-acoustic cavity.

Cited by 50 publications

References 46 publications

Nanoscale Lamb wave–driven motors in nonliquid environments

Nanoscale Lamb wave–driven motors in nonliquid environments

Multi-pulse laser-induced bubble formation and nanoparticle aggregation using MoS2 nanoparticles

On‐Chip Generation of Vortical Flows for Microfluidic Centrifugation

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