A Reconfigurable All-Optical-Controlled Synaptic Device for Neuromorphic Computing Applications

ACS Nano, Journal Year: 2024, Volume and Issue: 18(25), P. 16236 - 16247

Published: June 13, 2024

Retina-inspired visual sensors play a crucial role in the realization of neuromorphic systems. Nevertheless, significant obstacles persist pursuit achieving bidirectional synaptic behavior and attaining high performance context photostimulation. In this study, we propose reconfigurable all-optical controlled device based on IGZO/SnO/SnS heterostructure, which integrates sensing, storage processing functions. Relying simple heterojunction stack structure energy band engineering, excitatory inhibitory behaviors can be observed under light stimulation ultraviolet (266 nm) visible (405, 520 658 without additional voltage modulation. particular, junction field-effect transistors heterostructure were fabricated to elucidate underlying photoresponse mechanism. addition optical signal processing, an artificial neural network simulator optoelectrical synapse was trained recognized handwritten numerals with recognition rate 91%. Furthermore, prepared 8 × array successfully demonstrated process perception memory for image human brain, as well simulated situation damage retina by light. This work provides effective strategy development high-performance optoelectronic synapses practical approach design multifunctional vision

Language: Английский

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Novel fabrication techniques for ultra-thin silicon based flexible electronics

International Journal of Extreme Manufacturing, Journal Year: 2024, Volume and Issue: 6(4), P. 042005 - 042005

Published: May 9, 2024

Abstract Flexible electronics offer a multitude of advantages, such as flexibility, lightweight property, portability, and high durability. These unique properties allow for seamless applications to curved soft surfaces, leading extensive utilization across wide range fields in consumer electronics. applications, example, span integrated circuits, solar cells, batteries, wearable devices, bio-implants, robotics, biomimetic applications. Recently, flexible electronic devices have been developed using variety materials organic, carbon-based, inorganic semiconducting materials. Silicon (Si) owing its mature fabrication process, excellent electrical, optical, thermal properties, cost efficiency, remains compelling material choice Consequently, the research on ultra-thin Si context is studied rigorously nowadays. The thinning crucially important it reduces bending stiffness resultant strain, thereby enhancing flexibility while preserving exceptional properties. This review provides comprehensive overview recent efforts techniques forming top-down bottom-up approaches explores their

Language: Английский

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A Self-Powered Organic Vision Sensor Array for Photopic Adaptation

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 10, 2025

With the rapid development of artificial intelligence, it is essential to develop a bionic vision sensor that boasts low power consumption, self-adaptability, and broadband sensing for efficient image preprocessing. We employed an organic p-type semiconductor, poly(3-hexylthiophene-2,5-diyl) (P3HT), in conjunction with Al electrode engineer Schottky junction. This design leverages photogating effect due charge trapping by defects at P3HT/Al interface, endowing this self-powered, two-terminal device photopic adaptability. The 1.9 eV bandgap P3HT enables substantial light absorption within visible spectrum, yielding significant photocurrent. By assembling 50 photoelectric sensors into 10 × 5 array, we successfully demonstrated formation process emulates adaptation, specifically recognizing letters. easily fabricated, self-powered retinomorphic has great potential mimic retinal structures, thereby heralding new frontier visual sensory devices.

Language: Английский

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Anti-freezing multifunctional conductive hydrogels: from structure design to flexible electronic devices

Materials Chemistry Frontiers, Journal Year: 2023, Volume and Issue: 8(2), P. 381 - 403

Published: Oct. 25, 2023

In this review, we systematically provide an overview of anti-freezing multifunctional conductive hydrogel-based flexible electronics and summarize the design strategies, properties, applications perspectives.

Language: Английский

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Neuromorphic Vision Sensor driven by Ferroelectric HfAlO

Materials Today Nano, Journal Year: 2024, Volume and Issue: 26, P. 100473 - 100473

Published: March 19, 2024

Language: Английский

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E-Skin and Its Advanced Applications in Ubiquitous Health Monitoring

Biomedicines, Journal Year: 2024, Volume and Issue: 12(10), P. 2307 - 2307

Published: Oct. 11, 2024

E-skin is a bionic device with flexible and intelligent sensing ability that can mimic the touch, temperature, pressure, other functions of human skin. Because its flexibility, breathability, biocompatibility, characteristics, it widely used in health management, personalized medicine, disease prevention, pan-health fields. With proposal new principles, development advanced functional materials, microfabrication technology, integration artificial intelligence algorithms, e-skin has developed rapidly. This paper focuses on fundamentals, key technologies, their specific applications exercise monitoring, emotion heart etc. needs to have healthcare field. In addition, significance infant child care, elderly assistive devices for disabled analyzed. Finally, current challenges future directions field are discussed. It expected this review will generate great interest inspiration improvement novel e-skins monitoring systems.

Language: Английский

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Impact of terahertz short pulses on the oxygen defect state in TiO2−x

Physical Review Research, Journal Year: 2025, Volume and Issue: 7(2)

Published: April 3, 2025

Oxygen-deficient titanium dioxide (TiO2−x) is a very attractive material for several applications ranging from photocatalysis to resistive switching. Oxygen vacancies turn insulating anatase into polaronic conductor, while creating defect-state band below the ultraviolet semiconducting gap. Here we employ combination of broadband infrared (IR) reflectivity and THz-pump/IR-probe measurements investigate relationship between localized defect states delocalized conducting states. We show that THz pump allows convert deeply electrons metastable polarons with lifetime in ns range. These long-lived may find application novel optoelectronic exploiting interplay dc resistivity, terahertz signals. Published by American Physical Society 2025

Language: Английский

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Conformal Retinal Image Sensor Based on Electrochemically Exfoliated MoS2 Nanosheets

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(8), P. 622 - 622

Published: April 18, 2025

Retina-like photoimaging devices with features such as a wide-field-of-view and high spatial resolution have wide application prospects in retinal prosthetics remote sensing. However, the fabrication of flexible conformal surfaces is hindered by incompatible microfabrication processes traditional rigid, silicon-based substrates. A kirigami strategy for hemispherical surface assembly proposed to construct MoS2-based retina-like photodetector array. The device first fabricated on flat polyimide (PI) substrate then tailored using laser. By approximating spherical planar sectors, laser-cut PI film can tightly adhere PDMS shell without significant wrinkles. responsivity specific detectivity our reach 247.9 A/W 6.16 × 1011 Jones, respectively. array integrates 180 pixels crown radius 11 mm, hollow letter “T” successfully recognized. Comprehensive experimental results this work reveal utility photoelectric detection imaging. We believe that provides new methodology exploitation 2D material-based image sensors.

Language: Английский

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An Application-Driven Survey on Event-Based Neuromorphic Computer Vision

Information, Journal Year: 2024, Volume and Issue: 15(8), P. 472 - 472

Published: Aug. 9, 2024

Traditional frame-based cameras, despite their effectiveness and usage in computer vision, exhibit limitations such as high latency, low dynamic range, power consumption, motion blur. For two decades, researchers have explored neuromorphic which operate differently from traditional types, mimicking biological vision systems for enhanced data acquisition spatio-temporal resolution. Each pixel asynchronously captures intensity changes the scene above certain user-defined thresholds, streams of events are captured. However, distinct characteristics these sensors mean that methods not directly applicable, necessitating investigation new approaches before being applied real applications. This work aims to fill existing gaps literature by providing a survey discussion centered on different application domains, differentiating between problems whether solutions better suited or been specific field. Moreover, an extensive highlights major achievements challenges, addition unique characteristics, each

Language: Английский

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Hysteresis erasure in ZIF-8@ZnO nanorod array field-effect transistors through oxygen chemisorption-induced depolarization

APL Materials, Journal Year: 2024, Volume and Issue: 12(1)

Published: Jan. 1, 2024

Zeolitic imidazolate framework-8 (ZIF-8) is a versatile candidate for next-generation electronics owing to its adjustable lattice and physicochemical properties. However, the utilization of ZIF-8 fabrication solid-state circuit components, such as field-effect transistors (FETs), has not been realized thus far, primarily due ongoing debates surrounding electrical In this work, we fabricated n-type FETs using ZIF-8@ZnO nanorod arrays. A significant hysteresis behavior was observed. It demonstrated that cannot be assigned well-established ferroelectric effect but rather polarization ZIF-8, wherein electric field gate aligns dipole 2-methylimidazole through molecular orientation rotation. clarified process annealing in air can result chemisorption oxygen on methylimidazole, leading limitation rotation methylimidazole. This restriction ultimately causes depolarization resulting erasure hysteresis. study unfolds tunable sensibility oxygen, thereby highlighting potential applications FETs, nonvolatile memories, gas sensors.

Language: Английский

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