Heat-Mediated Optical Manipulation

Chen, Zhihan; Li, Jingang; Zheng, Yuebing

doi:10.1021/acs.chemrev.1c00626

Cited by 96 publications

(76 citation statements)

References 511 publications

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“…Over recent decades, optothermal manipulation techniques [1][2][3][4] have become useful tools for manipulating micro-objects such as microparticles [5][6][7][8][9][10][11][12], or microbubbles [13][14][15][16][17], etc. The optothermal methods manipulate the micro-objects by exerting the optothermal forces, which are based on various light-induced thermal processes [1] such as Marangoni convection [18], thermophoresis [19], thermophoretic depletion [20], thermoelectricity [21][22][23], and photophoresis [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Transverse Trapping Forces of an Optothermal Trap Close to an Absorbing Reflective Film

et al. 2022

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The optothermal manipulation of micro-objects is significant for understanding and exploring the unknown in the microscale word, which has found many applications in colloidal science and life science. In this work, we study the transverse forces of an optothermal trap in front of a gold film, which is an absorbing reflective surface for the incident laser beam. It is demonstrated that optothermal forces can be divided into two parts: optical force of a standing-wave trap, and thermal force of a thermal trap. The optical force of the standing-wave trap can be obtained by measuring the optical trapping force close to a non-absorbing film with same reflectance. The thermal force can be obtained by subtracting the optical force of the standing-wave trap from the total trapping force of the optothermal trap close to the gold film. The results show that both optical and thermal trapping forces increase with laser power increasing. The optical trapping force is larger than the thermal trapping force, which is composed of convective drag force and thermophoretic force. Further experiment is run to study the composition of thermal force. The result shows that the convective flow is generated later than the thermophoretic flow. The results proposed here are useful for enabling users to optimize optothermal manipulation method for future applications.

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Section: Introductionmentioning

confidence: 99%

Experimental Study of Transverse Trapping Forces of an Optothermal Trap Close to an Absorbing Reflective Film

et al. 2022

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“…Besides heat transfer, the displacements of plastic membranes on the ferrofluid surface make it also an efficient mass transfer conveyor belt and many other microfluidic devices. [31][32][33][34]…”

Section: Resultsmentioning

confidence: 99%

Magnetically Enhanced Marangoni Convection for Efficient Mass and Heat Transfer like a Self‐Driving Liquid Conveyor Belt

Zhang

Lin

Liu

et al. 2022

Adv Funct Materials

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Temperature gradient-induced Marangoni convection has attracted much attention for basic research and applications since it provides an effective means for mass and heat transfer through a liquid surface flow. Here the authors first propose a general principle to enhance such surface flow by hindering its transition to recirculation flow using an external field. They subsequently identify ferrofluid and use it validate the principle since its reduced magnetic susceptibility at higher temperatures will make the heated surface liquid stay on the surface by a thermomagnetic body force. Using a laser beam to create a heated local surface and a magnet beneath the ferrofluid to provide a vertical field, a high speed and long-range Marangoni flow is confirmed experimentally and further supported by computational fluid dynamics simulations. To demonstrate possible applications, the authors show a self-driving pipeless liquid conveyor belt that can efficiently transfer heat from a source to sink without external power. The demonstration of enhanced Marangoni convection opens new avenue to explore interfacial fluid dynamics and its wide applications.

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“…Azimuthally polarized beams achieve higher axial trapping efficiency and lower photodamage than linearly polarized Gaussian beams when used for optical trapping of individual RBCs ( Yu et al, 2020 ). Moreover, many indirect-based cell manipulation strategies have been developed to significantly avoid photodamage to the target cell ( Chowdhury et al, 2013a ; Xie et al, 2018b ; Stoev et al, 2021 ; Chen et al, 2022 ). Previous reports suggesting that the photodamage can be totally eliminated for pushing-based cell manipulation, as opposed to occurrence rates of 67 and 33% for direct trapping and tool attachment or gripping, respectively, ( Chowdhury et al, 2013b ; Banerjee et al, 2014 ).…”

Section: Resultsmentioning

confidence: 99%

Non-Invasive Dynamic Reperfusion of Microvessels In Vivo Controlled by Optical Tweezers

Meng

Zhong

Wang

et al. 2022

Front. Bioeng. Biotechnol.

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Distributive shock is considered to be a condition of microvascular hypoperfusion, which can be fatal in severe cases. However, traditional therapeutic methods to restore the macro blood flow are difficult to accurately control the blood perfusion of microvessels, and the currently developed manipulation techniques are inevitably incompatible with biological systems. In our approach, infrared optical tweezers are used to dynamically control the microvascular reperfusion within subdermal capillaries in the pinna of mice. Furthermore, we estimate the effect of different optical trap positions on reperfusion at branch and investigate the effect of the laser power on reperfusion. The results demonstrate the ability of optical tweezers to control microvascular reperfusion. This strategy allows near-noninvasive reperfusion of the microvascular hypoperfusion in vivo. Hence, our work is expected to provide unprecedented insights into the treatment of distributive shock.

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Heat-Mediated Optical Manipulation

Cited by 96 publications

References 511 publications

Experimental Study of Transverse Trapping Forces of an Optothermal Trap Close to an Absorbing Reflective Film

Experimental Study of Transverse Trapping Forces of an Optothermal Trap Close to an Absorbing Reflective Film

Magnetically Enhanced Marangoni Convection for Efficient Mass and Heat Transfer like a Self‐Driving Liquid Conveyor Belt

Non-Invasive Dynamic Reperfusion of Microvessels In Vivo Controlled by Optical Tweezers

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