Light‐Induced Cold Marangoni Flow for Microswarm Actuation: From Intelligent Behaviors to Collective Drug Delivery (Laser Photonics Rev. 16(12)/2022)

Yang, Shiwen; Wang, Danning; Xiao, Yilin; Pan, Ting; Lü, Dagang; Zhu, Guoshuai; Xiong, Jianyun; Li, Baojun; Xin, Hongbao

doi:10.1002/lpor.202270062

Cited by 6 publications

(9 citation statements)

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“…Moreover, in conventional MSN‐based drug delivery, nanoparticles typically approach cell surfaces through passive Brownian motion, resulting in limited cell targeting precision. [ 79 ] However, HAONT offers an opportunity to enhance drug delivery accuracy and efficiency, transforming passive diffusion into an active process. As depicted in Figure 5c, at a laser power of 0.62 mW, the MSNs with diameters of ≈100 nm (for preparation details, please refer to Note S9, Supporting Information) can also be induced into a DSV trapping mode, allowing them to follow the movement of the laser spot (see Video S8, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Highly‐Adaptable Optothermal Nanotweezers for Trapping, Sorting, and Assembling across Diverse Nanoparticles

Chen,

Zhou,

Peng

et al. 2023

Advanced Materials

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Optical manipulation of various kinds of nanoparticles is vital in biomedical engineering. However, classical optical approaches demand higher laser power and are constrained by diffraction limits, necessitating tailored trapping schemes for specific nanoparticles. They lack a universal and biocompatible tool to manipulate nanoparticles of diverse sizes, charges, and materials. Through precise modulation of diffusiophoresis and thermo‐osmotic flows in the boundary layer of an optothermal‐responsive gold film, highly adaptable optothermal nanotweezers (HAONTs) capable of manipulating a single nanoparticle as small as sub‐10 nm are designed. Additionally, a novel optothermal doughnut‐shaped vortex (DSV) trapping strategy is introduced, enabling a new mode of physical interaction between cells and nanoparticles. Furthermore, this versatile approach allows for the manipulation of nanoparticles in organic, inorganic, and biological forms. It also offers versatile function modes such as trapping, sorting, and assembling of nanoparticles. It is believed that this approach holds the potential to be a valuable tool in fields such as synthetic biology, optofluidics, nanophotonics, and colloidal science.

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Section: Resultsmentioning

confidence: 99%

Highly‐Adaptable Optothermal Nanotweezers for Trapping, Sorting, and Assembling across Diverse Nanoparticles

Chen,

Zhou,

Peng

et al. 2023

Advanced Materials

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“…In contrast to the conventional Marangoni convection, recently researchers reported the light‐induced cold Marangoni flow (CMF) strategy for photothermal damage‐free microswarm actuation with high controllability and flexibility. [ 119 ] The light‐induced CMF is performed in water droplet surrounded by silicon oil. Under the focused irradiation of a 1064 nm laser on the oil region, the photothermal effect generates a thermal flow in silicone oil and rapidly transfers the heat to the water/silicone oil (W/O) interface.…”

Section: Plasmonic Nanostructures‐assisted Optothermal Manipulation O...mentioning

confidence: 99%

Colloidal Manipulation through Plasmonic and Non‐plasmonic Laser‐Assisted Heating

George

2023

Laser & Photonics Reviews

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In spite of the long‐term awareness of the conversion of light to heat even in materials with low absorption coefficient via the photothermal effect and consequent usage of the effect to evaluate thermo‐optic properties of the materials, only recently has the thermal field created via photon‐to‐phonon conversion been exploited for manipulation of colloidal objects as well as living cells. As compared to conventional direct photon‐assisted manipulation via optical tweezers, the optothermal manipulation technique employs much lower optical source power and can manipulate particles over a long range. In this review, the working mechanisms, concepts, and applications of a series of recently established optothermal techniques are discussed for the manipulation of diverse species including micro/nanoparticles, biological cells, molecules, and micelles in various fluidic environments. The physical mechanism of the optical manipulation that relies on the coordinated action of thermal convection, Marangoni convection, thermophoresis, thermoelectricity, depletion attraction, and thermo‐osmotic flow is discussed in detail. With their low‐power operation, diverse functionalities, and simple optics employed, optothermal manipulation techniques are increasingly finding a wide range of applications in colloidal science, life sciences, materials science, and nanoscience, as well as in the developments of colloidal functional devices and nanomedicine.

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“…By modulating the external fields, [ 14,15 ] the gathered mesoscopic objects can exhibit collective swarming behaviors [ 16,17 ] and perform on‐demand coordinated tasks. [ 18,19 ]…”

Section: Introductionmentioning

confidence: 99%

“…By modulating the external fields, [14,15] the gathered mesoscopic objects can exhibit collective swarming behaviors [16,17] and perform on-demand coordinated tasks. [18,19] To date, various kinds of artificial microswarms, from abiotic micro/nanoparticles to living microorganisms such as bacteria colonies, have been reported to show their swarming behavior in 2D space. [20,21] Although these microswarms successfully implemented 2D directional migration with reconfigurable patterns, 3D collective motion of microswarms is still barely explored.…”

Section: Introductionmentioning

confidence: 99%

Opto‐Hydrodynamic Driven 3D Dynamic Microswarm Petals

Li,

Shi,

Pan

et al. 2023

Laser & Photonics Reviews

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Artificial microswarms with a collective intelligence that can execute cooperative tasks will serve as intelligent micro/nanorobot systems for many biomedical and microengineering applications. However, it remains challenging to construct microswarms with 3D dynamic and reconfigurable structures that can execute complex spatiotemporal‐dependent tasks. Here, simply using a tapered optical fiber (TOF) with 1.55 µm wavelength light irradiation, a convenient opto‐hydrodynamic strategy for 3D dynamic microswarm actuation based on photothermal gradient‐induced Marangoni effect is reported. With light irradiation at the water‐air interface, randomly distributed microparticles are reorganized into firework‐like 3D swarms with four petals. Such petals in the microswarm are controllably reconfigurable by adjusting the angle between TOF and water‐air interface. These microswarms are also deformable and capable of performing stable migration by simply moving the TOF. Importantly, this opto‐hydrodynamic strategy is applicable for the formation of artificial 3D‐dynamic bio‐microswarms using different biological cells, which further facilitate the regulation of biological processes such as bacteria growth/division. This opto‐hydrodynamic strategy provides a new solution for 3D dynamic microswarm formation, with many potentials for biomedical and microengineering applications that need spatiotemporal‐dependent individual cooperation.

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Light‐Induced Cold Marangoni Flow for Microswarm Actuation: From Intelligent Behaviors to Collective Drug Delivery (Laser Photonics Rev. 16(12)/2022)

Cited by 6 publications

References 0 publications

Highly‐Adaptable Optothermal Nanotweezers for Trapping, Sorting, and Assembling across Diverse Nanoparticles

Highly‐Adaptable Optothermal Nanotweezers for Trapping, Sorting, and Assembling across Diverse Nanoparticles

Colloidal Manipulation through Plasmonic and Non‐plasmonic Laser‐Assisted Heating

Opto‐Hydrodynamic Driven 3D Dynamic Microswarm Petals

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