Inspiration from Visual Ecology for Advancing Multifunctional Robotic Vision Systems: Bio‐inspired Electronic Eyes and Neuromorphic Image Sensors DOI
Changsoon Choi, Gil Ju Lee, Sehui Chang

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 14, 2024

In robotics, particularly for autonomous navigation and human-robot collaboration, the significance of unconventional imaging techniques efficient data processing capabilities is paramount. The unstructured environments encountered by robots, coupled with complex missions assigned to them, present numerous challenges necessitating diverse visual functionalities, consequently, development multifunctional robotic vision systems has become indispensable. Meanwhile, rich diversity inherent in animal systems, honed over evolutionary epochs meet their survival demands across varied habitats, serves as a profound source inspirations. Here, recent advancements drawing inspiration from natural ocular structures perception mechanisms are delineated. First, unique functionalities eyes terrestrial, aerial, aquatic habitats signal mechanism humans explored. Then, designs bio-inspired electronic explored, engineered mimic key components underlying optical principles eyes. Furthermore, neuromorphic image sensors discussed, emulating functional properties synapses, neurons, retinas thereby enhancing accuracy efficiency tasks. Next, integration examples mobile robotic/biological introduced. Finally, forward-looking outlook on provided.

Language: Английский

Femtosecond laser direct writing of functional stimulus-responsive structures and applications DOI Creative Commons
Yuxuan Zhang, Dong Wu, Yachao Zhang

et al.

International Journal of Extreme Manufacturing, Journal Year: 2023, Volume and Issue: 5(4), P. 042012 - 042012

Published: Sept. 7, 2023

Abstract Diverse natural organisms possess stimulus-responsive structures to adapt the surrounding environment. Inspired by nature, researchers have developed various smart with adjustable properties and functions address demands of ever-changing application environments that are becoming more intricate. Among many fabrication methods for structures, femtosecond laser direct writing (FsLDW) has received increasing attention because its high precision, simplicity, true three-dimensional machining ability, wide applicability almost all materials. This paper systematically outlines state-of-the-art research on prepared FsLDW. Based introduction laser-matter interaction mainstream FsLDW-based manufacturing strategies, different stimulating factors can trigger structural responses intelligent such as magnetic field, light, temperature, pH, humidity, emphatically summarized. Various applications functional stimuli-responsive dynamic behaviors fabricated FsLDW, well present obstacles forthcoming development opportunities, discussed.

Language: Английский

Citations

30
Dual‐Stimuli Cooperative Responsive Hydrogel Microactuators Via Two‐Photon Lithography DOI

Jianyu Wang,

Feng Jin,

Xian‐Zi Dong

et al.

Small, Journal Year: 2023, Volume and Issue: 19(40)

Published: June 1, 2023

Abstract With the development of bionics as well materials science, intelligent soft actuators have shown promising applications in many fields such robotics, sensing, and remote manipulation. Microfabrication technologies enabled reduction size responsive to micron level. However, it is still challenging construct microscale capable responding different external stimuli complex diverse conditions. Here, this work demonstrates a dual‐stimuli cooperative hydrogel microactuator by asymmetric fabrication via femtosecond laser direct writing. The dual response microstructure achieved employing with functional monomer 2‐(dimethylamino)ethyl methacrylate. Raman spectra microstructures suggest that pH temperature generated changes tertiary amine groups hydrogen bonds, respectively. show opposite bending direction when being heated high or exposed acid solution, can independently accomplish grasp polystyrene microspheres. Moreover, depicts at same time. microactuators will provide strategy for designing fabricating controllable microrobotics microfluidics.

Language: Английский

Citations

26
Adaptive multiscale microscope with fast zooming, extended working distance, and large field of view DOI Creative Commons
Yi Zheng, Xin Wang,

Zhao Jiang

et al.

Deleted Journal, Journal Year: 2024, Volume and Issue: 5(1), P. 1 - 1

Published: Jan. 1, 2024

The field-of-view (FOV), depth of field, and resolution conventional microscopes are constrained by each other; therefore, a zoom function is required. Traditional methods lose real-time performance have limited information throughput, severely limiting their application, especially in three-dimensional dynamic imaging large-amount or large-size sample scanning. Here, an adaptive multiscale (AMS) mechanism combining the benefits liquid lenses techniques proposed to realize functions fast zooming, wide working distance (WD) range large FOV on self-developed AMS microscope. design principles were revealed. Moreover, nonuniform-distortion-correction algorithm composite patching designed improve image quality. continuous tunable magnification microscope from 9× 18×, with corresponding diameters ranging 2.31 0.98 mm 161 287 line-pairs/mm, respectively. extended WD 0.8 response time 38 ms. Experiments demonstrated advantages pathological scanning, thick-sample imaging, microfluidic process monitoring, observation living microorganisms. first step towards technology expected be applied life sciences, medical diagnosis, industrial detection.

Language: Английский

Citations

14
Femtosecond Laser Fabrication of Refractive/Diffractive Micro‐Optical Components on Hard Brittle Materials DOI

Jia‐Wei Tan,

Gong Wang, Yunfei Li

et al.

Laser & Photonics Review, Journal Year: 2023, Volume and Issue: 17(8)

Published: July 2, 2023

Abstract Micro‐optical components exhibit significant potential applications in various fields such as imaging, optical fiber communication, and aerospace owing to their small size, light weight, flexible design. It is imperative fabricate micro‐optical on hard brittle materials improve stability broaden the transmission range. Therefore, femtosecond laser processing technology demonstrated be an efficient strategy for preparing refractive/diffractive compared other established micromachining techniques. This study reviews recent advances using technologies. The of with high accuracy, efficiency, quality sensing, display, integration are also summarized. Moreover, challenges technologies outlook highlighted.

Language: Английский

Citations

20
MXene based flexible photodetectors: progress, challenges, and opportunities DOI
La Li, Guozhen Shen

Materials Horizons, Journal Year: 2023, Volume and Issue: 10(12), P. 5457 - 5473

Published: Jan. 1, 2023

This review highlights the progress, challenges and opportunities in MXene based flexible photodetectors.

Language: Английский

Citations

20
Photodetector-Based Material from a Highly Sensitive Free-Standing Graphene Oxide/Polypyrrole Nanocomposite DOI Open Access
Amira Ben Gouider Trabelsi, Asmaa M. Elsayed, Fatemah H. Alkallas

et al.

Coatings, Journal Year: 2023, Volume and Issue: 13(7), P. 1198 - 1198

Published: July 4, 2023

This paper describes the establishment of free-standing rolled graphene oxide (roll-GO) and polypyrrole (Ppy) using a modified Hummer method oxidative polymerization. Then, photodetector was created by removing thin film from filter attaching it to tape. The chemical structure roll-GO confirmed XRD FTIR analysis, while SEM TEM showed that in nature. material had small bandgap 2.4 eV high current density light conditions. responded well monochromatic light, with Jph values changing 0.027 0.019 mA/cm2 as wavelengths decreased 340 730 nm. photoresponsivity (R) detectivity (D) were high, at nm (0.27 mA/W 6.0 × 107 Jones, respectively) (0.19 4.25 respectively). addition Ppy improved these parameters, Ppy/roll-GO/tape photoelectrode showing excellent R D 0.33 7.34 respectively. Furthermore, production photocurrent V = 0 indicated Ppy/roll-GO layer could be used for solar cell applications. Overall, results suggest prepared has potential use optical region between may suitable industrial

Language: Английский

Citations

18
Highly Uniform Spherical MoO2-MoO3/Polypyrrole Core-Shell Nanocomposite as an Optoelectronic Photodetector in UV, Vis, and IR Domains DOI Creative Commons
Asmaa M. Elsayed, Fatemah H. Alkallas, Amira Ben Gouider Trabelsi

et al.

Micromachines, Journal Year: 2023, Volume and Issue: 14(9), P. 1694 - 1694

Published: Aug. 30, 2023

A highly uniform spherical MoO2-MoO3/polypyrrole core-shell nanocomposite has been successfully synthesized as an optoelectronic photon sensing material, capable of detecting light in the UV, Vis, and IR domains. The is prepared through oxidation pyrrole using Na2MoO4, resulting a morphology that confirmed by TEM, theoretical modeling, SEM analyses. This contributes to its promising optical behavior, characterized small bandgap 1.36 eV. photosensing capability evaluated across spectra, demonstrating high efficiency. photoresponsivity R values indicate ability generate hot electrons response incident photons. With value 4.15 mA·W−1 at 440 nm, this device exhibits considerable promise for integration into advanced technological apparatus. detection (D) 9.30 × 108 Jones nm further confirms sensitivity Vis region. excellent stability can be attributed inherent MoO2-MoO3 oxide Ppy polymer materials. demonstrated reproducibility studies current-voltage measurements under various conditions. combination stability, efficiency, makes well suited applications both industrial commercial settings. Its performance opens up opportunities advancements fields requiring accurate reliable detection.

Language: Английский

Citations

17
A Holographic Broadband Achromatic Metalens DOI
Xinghao Wang, Shunli Liu, Liqun Xu

et al.

Laser & Photonics Review, Journal Year: 2023, Volume and Issue: 18(3)

Published: Dec. 12, 2023

Abstract Metalens with nanostructured optical elements are designed to control wavefront shaping at the wavelength‐scale thickness. However, most metalens still suffer from large chromatic aberrations due phase dispersion, limiting their wide applications for multiple wavelengths. Here, avoiding complex resonant designs or multiple‐layer nanostructures, a simple broadband achromatic by holographic diffraction in visible spectrum is demonstrated. The hyperbolic distributions of discrete wavelengths within shared aperture and fabricate diffractive flexible direct‐laser‐writing technique randomly interleaved. polarization‐insensitive modulate light field changing height artificial neuron units achieve average focusing efficiencies 55% spectrum. This design concept can pave way expand metalenses spectra.

Language: Английский

Citations

17
A planar compound eye based microsystem for high precision 3D perception DOI Creative Commons
Li Zhang, Haiyang Zhan, Xinyuan Liu

et al.

PhotoniX, Journal Year: 2024, Volume and Issue: 5(1)

Published: June 7, 2024

Abstract Three-dimensional (3D) panoramic vision system plays a fundamental role in the biological perception of external information, and naturally becomes key for embodied intelligence to interact with outside world. A binocular rotating eyeball has long baseline, large volume weak sensitivity motion. compound eye small volume, high motion but poor precision. Here, planar microsystem precision 3D is proposed by combining semiconductor manufacturing process structure. Using image sensor as sensing unit, space-coded sub-eye array designed its sub field view (FOV) dynamically mapped sensor. It solves problem that traditional cannot simultaneously accommodate wide FOV focal length resolution. The parallax among different sub-eyes enables accurately perceive track position target range 10 m within 120 ° single eye. This great significance fields intelligent robot perception.

Language: Английский

Citations

8
Two-photon polymerization-based 3D micro-scaffolds toward biomedical devices DOI
Wei Wang, Ziqing Chen, Bin Lin

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 493, P. 152469 - 152469

Published: May 22, 2024

Language: Английский

Citations

7