Light‐Induced In‐Plane Rotation of Microobjects on Microfibers

Lyu, Wei; Tang, Weiwei; Yan, Wei; Qiu, Min

doi:10.1002/lpor.202100561

Cited by 10 publications

(21 citation statements)

References 31 publications

(64 reference statements)

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“…We experimentally observe that a Sb2Te3 plate can be driven much more efficiently than a similarly sized gold plate 17 , 19 , 20 under irradiation of the same light pulses. For instance, as is shown in Fig.…”

Section: Remarks On Actuation Efficiencymentioning

confidence: 88%

“…The underlying mechanisms, featuring interplay between elastic waves and their induced friction force, have been comprehensively studied in our previous work, and we refer the interested reader to Refs. 17, 19, and 20.…”

Section: Light-induced Actuationmentioning

confidence: 99%

“…It is, however, challenging to use the optical force to manipulate microobjects on solid interfaces due to surface friction that is typically several orders of magnitude larger (∼μN) than the optical force (∼pN) 4 , 6 , 12 – 15 To resolve this difficulty, it has been recently proposed to use elastic waves, 16 – 22 which are induced by temperature rising through optical absorption in microobjects 16 – 20 These light-induced elastic waves carry sufficient mechanical displacements enabling microobjects to crawl on solid interfaces.…”

Section: Introductionmentioning

confidence: 99%

“… – 15 To resolve this difficulty, it has been recently proposed to use elastic waves, 16 – 22 which are induced by temperature rising through optical absorption in microobjects 16 – 20 These light-induced elastic waves carry sufficient mechanical displacements enabling microobjects to crawl on solid interfaces. The idea has been successfully exemplified with gold microplates in microfiber-based systems 16 …”

Section: Introductionmentioning

confidence: 99%

“…The idea has been successfully exemplified with gold microplates in microfiber-based systems 16 – 20 Specifically, the researchers have successfully observed the stable motion of gold plates around microfibers along either or both of azimuthal and axial directions of the microfibers. The motion speed increases with the average power of input laser pulses.…”

Section: Introductionmentioning

confidence: 99%

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Light-induced vacuum micromotors based on an antimony telluride microplate

et al. 2022

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Manipulating motion of microobjects with light is indispensable in various technologies. On solid interfaces, its realizations, however, are hampered by surface friction. To resolve this difficulty, light-induced elastic waves have been recently proposed to drive microobjects against friction. Despite its expected applicability for arbitrary optical-absorptive objects, the new principle has only been tested with microsized gold plates. Herein, we validate this principle using a new material and report directional and continuous movements of a two-dimensional topological insulator (Sb 2 Te 3 ) plate on an untreated microfiber surface driven by nanosecond laser pulses. The motion performance of the Sb 2 Te 3 plate is characterized by a scanning electron microscope. We observe that the motion velocity can be controlled by tuning the average power of laser pulses. Further, by intentionally increasing the pulse repetition rate and exploiting the low thermal conductivity of Sb 2 Te 3 , we examine the thermal effects on actuation and reveal the motion instability induced by formations of microbumps on Sb 2 Te 3 surfaces due to the Marangoni effects. Moreover, as the formed microbumps are heated to viscoelasticity states, liquid-like motion featuring asymmetry in contact angles is observed and characterized, which expands the scope of light-induced actuation of microobjects.

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Section: Remarks On Actuation Efficiencymentioning

confidence: 88%

Section: Light-induced Actuationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Light-induced vacuum micromotors based on an antimony telluride microplate

et al. 2022

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Precise and Omnidirectional Opto‐Thermo‐Elastic Actuation in Van Der Waals Contacting Systems

Jia,

Tang,

Sun

et al. 2024

Advanced Science

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Actuation of micro‐objects along unconstrained trajectories in van der Waals contacting systems—in the same capacity as optical tweezers to manipulate particles in fluidic environments—remains a formidable challenge due to the lack of effective methods to overcome and exploit surface friction. Herein, a technique that aims to resolve this difficulty is proposed. This study shows that, by utilizing a moderate power beam of light, micro‐objects adhered on planar solid substrates can be precisely guided to move in arbitrary directions, realizing sub‐nanometer resolution across extended surfaces. The underlying mechanism is the interplay between surface friction and pulsed opto‐thermo‐elastic deformations, and to render a biased motion with off‐centroid light illumination. This technique enables high‐precision assembly, separation control of nanogaps, regulation of rotation angles in various material‐substrate systems, whose capability is further tested in reconfigurable construction of optoelectronic devices. With simple set‐up and theoretical generality, opto‐thermo‐elastic actuation opens up an avenue for versatile optical manipulation in the solid domain.

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Advance on fiber optic‐based biosensors for precision medicine: From diagnosis to therapy

Luo,

Li,

Kong

et al. 2023

Interdisciplinary Medicine

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Precision medicine that takes individual variability into account is a new way to minimize the individual variability for precise diagnosis and to establish the certain strategies of efficient therapy. Due to miniaturization sensing area, remoting detection, and flexible operation of light, fiber optics have been successfully used to develop in vitro, wearable, and implanted biosensors, exhibiting high potential in precision medicine from the diagnosis in vitro to therapy in vivo. When modified with the recognition element, the fiber optic‐based biosensor enables the point of care testing for the detection of disease biomarkers. Meanwhile, the fiber optics packaged in a needle/catheter also monitor the medical Internet of things for the continuous assessment of human health. Moreover, the light from the cladding or leaky mode in the fiber optics excites the strong photothermal effect for therapy. The fiber optic‐based biosensor addressed the drawbacks of plasmonic photothermal therapy that limited penetration depths and non‐selectivity therapy. When integrated with a photothermal agent, the fiber optic‐based biosensors provide in situ information for the diagnosis as well as specifically and efficiently kill the tumor cells in deep tissues. In this review, we summarized the advances of fiber optic‐based biosensors in the diagnosis in vitro and therapy in vivo. The challenges and prospection of the fiber optic‐based biosensor application in precision medicine were also explored in depth.

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Light‐Induced In‐Plane Rotation of Microobjects on Microfibers

Cited by 10 publications

References 31 publications

Light-induced vacuum micromotors based on an antimony telluride microplate

Light-induced vacuum micromotors based on an antimony telluride microplate

Precise and Omnidirectional Opto‐Thermo‐Elastic Actuation in Van Der Waals Contacting Systems

Advance on fiber optic‐based biosensors for precision medicine: From diagnosis to therapy

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