Magnetically Driven Micro and Nanorobots

Chemical Reviews, Год журнала: 2021, Номер 121(8), С. 4999 - 5041

Опубликована: Март 31, 2021

Manipulation and navigation of micro nanoswimmers in different fluid environments can be achieved by chemicals, external fields, or even motile cells. Many researchers have selected magnetic fields as the active actuation source based on advantageous features this strategy such remote spatiotemporal control, fuel-free, high degree reconfigurability, programmability, recyclability, versatility. This review introduces fundamental concepts advantages micro/nanorobots (termed here "MagRobots") well basic knowledge materials, setups for manipulation, field configurations, symmetry-breaking strategies effective movement. These are discussed to describe interactions between fields. Actuation mechanisms flagella-inspired MagRobots (i.e., corkscrew-like motion traveling-wave locomotion/ciliary stroke motion) surface walkers surface-assisted motion), applications other propulsion approaches, stimulation beyond provided followed fabrication techniques (quasi-)spherical, helical, flexible, wire-like, biohybrid MagRobots. Applications targeted drug/gene delivery, cell minimally invasive surgery, biopsy, biofilm disruption/eradication, imaging-guided delivery/therapy/surgery, pollution removal environmental remediation, (bio)sensing also reviewed. Finally, current challenges future perspectives development magnetically powered miniaturized motors discussed.

Язык: Английский

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Trends in Micro‐/Nanorobotics: Materials Development, Actuation, Localization, and System Integration for Biomedical Applications

Advanced Materials, Год журнала: 2020, Номер 33(4)

Опубликована: Дек. 4, 2020

Abstract Micro‐/nanorobots (m‐bots) have attracted significant interest due to their suitability for applications in biomedical engineering and environmental remediation. Particularly, vivo diagnosis intervention been the focus of extensive research recent years with various clinical imaging techniques being applied localization tracking. The successful integration well‐designed m‐bots surface functionalization, remote actuation systems, becomes crucial step toward applications, especially uses. This review thus addresses four different aspects m‐bots: design/fabrication, actuation, localization. diagnosis, sensing, microsurgery, targeted drug/cell delivery, thrombus ablation, wound healing are reviewed from these viewpoints. developed m‐bot systems comprehensively compared evaluated based on characteristics. current challenges directions future this field summarized.

Язык: Английский

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3D printing of functional microrobots

Chemical Society Reviews, Год журнала: 2021, Номер 50(4), С. 2794 - 2838

Опубликована: Янв. 1, 2021

3D printing can enable the customized design and fabrication of microrobots for a wide range functional applications.

Язык: Английский

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Two‐Photon Polymerization Lithography for Optics and Photonics: Fundamentals, Materials, Technologies, and Applications

Advanced Functional Materials, Год журнала: 2023, Номер 33(39)

Опубликована: Март 22, 2023

Abstract The rapid development of additive manufacturing has fueled a revolution in various research fields and industrial applications. Among the myriad advanced 3D printing techniques, two‐photon polymerization lithography (TPL) uniquely offers significant advantage nanoscale print resolution, been widely employed diverse fields, for example, life sciences, materials mechanics, microfluidics. More recently, by virtue optical transparency most resins used, TPL is finding new applications optics photonics, with nanometer to millimeter feature dimensions. It enables minimization elements systems, exploration light‐matter interactions degrees freedom, never possible before. To review recent progress related research, it starts fundamentals material formulation, then discusses novel fabrication methods, wide range These notably include diffractive, topological, quantum, color optics. With panoramic view development, concluded insights perspectives future potential

Язык: Английский

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Magnetic helical micro-/nanomachines: Recent progress and perspective

Matter, Год журнала: 2022, Номер 5(1), С. 77 - 109

Опубликована: Янв. 1, 2022

Язык: Английский

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Femtosecond Laser Thermal Accumulation-Triggered Micro-/Nanostructures with Patternable and Controllable Wettability Towards Liquid Manipulating

Nano-Micro Letters, Год журнала: 2022, Номер 14(1)

Опубликована: Апрель 8, 2022

Versatile liquid manipulating surfaces combining patternable and controllable wettability have recently motivated considerable attention owing to their significant advantages in droplet-solid impacting behaviors, microdroplet self-removal, liquid-liquid interface reaction applications. However, developing a facile efficient method fabricate these versatile remains an enormous challenge. In this paper, strategy for the fabrication of with on Polyimide (PI) film based femtosecond laser thermal accumulation engineering is proposed. Because its micro-/nanostructures chemical composition through adjusting local accumulation, PI can be tuned from superhydrophilicity (~ 3.6°) superhydrophobicity 151.6°). Furthermore, three diverse heterogeneous were constructed various applications successfully realized, including water transport, droplet arrays, wells. This work may provide achieving efficiently multifunctional steering surfaces.

Язык: Английский

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Miniature optoelectronic compound eye camera

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Сен. 26, 2022

Abstract Inspired by insect compound eyes (CEs) that feature unique optical schemes for imaging, there has recently been growing interest in developing optoelectronic CE cameras with comparable size and functions. However, considering the mismatch between complex 3D configuration of CEs planar nature available imaging sensors, it is currently challenging to reach this end. Here, we report a paradigm miniature integrated camera manufacturing polymer 19~160 logarithmic profile ommatidia via femtosecond laser two-photon polymerization. In contrast μ-CEs spherical suffer from defocusing problems, as-obtained permit direct integration commercial CMOS detector, because depth-of-field focus range all are significantly increased. The μ-CE enables large field-of-view (90°), spatial position identification sensitive trajectory monitoring moving targets. Moreover, can be microfluidic chip serves as an on-chip real-time microorganisms monitoring. insect-scale provides practical route integrating well-developed sensors micro-optics elements, holding great promise cutting-edge applications endoscopy robot vision.

Язык: Английский

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Nature-inspired strategies for the synthesis of hydrogel actuators and their applications

Progress in Polymer Science, Год журнала: 2023, Номер 140, С. 101665 - 101665

Опубликована: Фев. 26, 2023

Nature endows numerous organisms with the ability to realize their basic physiological activities through stimulus-responsive actuation. Inspired by these interesting biological structures, various biomimetic hydrogel actuators excellent controllability, fast response, and toughness have been developed. Here, principles of enabling behavior in polymer materials are first reviewed for example subsequently recent progress implementing stimuli-response bioinspired being discussed. Particular emphasis is on mechanisms underlying mechanical toughening its role applications. The goal highlight progress, find common threads, discuss fundamental differences determine current challenges future directions this field.

Язык: Английский

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Recent Advances on High‐Speed and Holographic Two‐Photon Direct Laser Writing

Advanced Functional Materials, Год журнала: 2023, Номер 33(39)

Опубликована: Фев. 22, 2023

Abstract Two‐Photon Lithography, thanks to its very high sub‐diffraction resolution, has become the lithographic technique par excellence in applications requiring small feature sizes and complex 3D pattering. Despite this, fabrication times required for extended structures remain much longer than those of other competing techniques (UV mask lithography, nanoimprinting, etc.). Its low throughput prevents wide adoption industrial applications. To increase it, over years different solutions have been proposed, although their usage is difficult generalize may be limited depending on specific application. A promising strategy further opening a concrete window industry, lies combination with holography approaches: this way it possible generate dozens foci from single laser beam, thus parallelizing periodic structures, or engineer intensity distribution writing plane way, obtaining microstructures exposure. Here, fundamental concepts behind high‐speed Lithography are discussed, literary production recent that exploits such reviewed, contextualized according topic covered.

Язык: Английский

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Stimuli‐Responsive Peptide Self‐Assembly to Construct Hydrogels with Actuation and Shape Memory Behaviors

Advanced Functional Materials, Год журнала: 2023, Номер 33(34)

Опубликована: Май 5, 2023

Abstract Hydrogel actuators, capable of generating reversible deformation in response to external stimulus, are widely considered as new emerging intelligent materials for applications soft robots, smart sensors, artificial muscles, and so on. Peptide self‐assembly is applied the construction hydrogel due their excellent stimulus response. However, actuators based on peptide rarely reported explored. In this study, a pH‐responsive (MA‐FIID) designed introduced into poly( N ‐isopropyl acrylamide) backbone (PNIPAM) construct bilayer heterogeneous assembly disassembly molecules under different pH conditions. These peptide‐containing can perform controllable bending, bucking, complex stimulation. Meanwhile, Hofmeister effect PNIPAM hydrogels endows these with enhanced mechanical strength, ionic (CaCl 2 ), shape‐memory property. This work broadens application supramolecular hydrogels, also provides inspirations materials.

Язык: Английский

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