Introducing Chiro-optical Activities in Photonic Synapses for Neuromorphic Computing and In-Memory Logic Operations

ACS Nano, Год журнала: 2024, Номер 18(22), С. 14457 - 14468

Опубликована: Май 20, 2024

In artificial synaptic devices aimed at mimicking neuromorphic computing systems, electrical or optical pulses, both, are generally used as stimuli. this work, we introduce chiral materials for tailoring the characteristics of photonic to achieve handedness-dependent and in-memory logic gates. based on a pair perovskites, use circularly polarized light (CPL) stimuli mimicked series opto-synaptic functionalities in order emulate multifunctional complex behavior human brain. Upon illumination two-terminal device, anisotropy current has been observed due out-of-plane carrier transport, originating from spin-selective transport. More importantly, gate achieved optoelectronic memristors turned out be chirality-dependent; while an R-device functioned AND gate, device same perovskite opposite chirality (S-device) acted NOR toward operations. These findings perovskite-based synapses can identify further strategies future computing, vision simulation, intelligence.

Язык: Английский

---

Solution‐Processed Ultralow Voltage Organic Transistors With Sharp Switching for Adaptive Visual Perception

Advanced Materials, Год журнала: 2024, Номер 36(32)

Опубликована: Май 29, 2024

Neuromorphic visual systems can emulate biological retinal to perceive information under different levels of illumination, making them have considerable potential for future intelligent vehicles and vision automation. However, the complex circuits high operating voltages conventional artificial present great challenges device integration power consumption. Here, bioinspired synaptic transistors based on organic single crystal phototransistors are reported, which exhibit excitation inhibition plasticity with time-varying. By manipulating charge dynamics trapping centers crystal-electret vertical stacks, operate below 1 V record on/off ratios close 10

Язык: Английский

---

Electret‐Inspired Charge‐Injected Hydrogel for Scar‐Free Healing of Bacterially Infected Burns Through Bioelectrical Stimulation and Immune Modulation

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Фев. 14, 2025

Abstract In this study, an electret‐inspired, charge‐injected hydrogel called QOSP (QCS/OD/SDI/PANI/PS/Plasma) that promotes scar‐free healing of bacteria‐infected burns through bioelectrical stimulation and immune modulation, is presented. The hydrogel, composed quaternized chitosan (QCS), oxidized dextran (OD), sulfadiazine (SDI), polystyrene (PS), polyaniline nanowires (PANI), forms a conductive network capable storing releasing electric charges, emulating electret‐like mechanism. This structure delivers signals continuously, enhancing wound by regulating responses minimizing fibrosis. mouse model second‐degree infected with Staphylococcus aureus (SA) Pseudomonas aeruginosa (PA), the accelerates 32% reduces bacterial load 60%, significantly inhibited scar formation 40% compared to controls. modulates Th1/Th2 balance toward Th1‐dominant antifibrotic state chitosan, thereby reducing collagen deposition 35%. Electro‐dielectric characterization reveals dielectric constant 6.2, 34% improvement in conductivity (3.33 × 10 −5 S/m) 30 °C increase thermal stability. Proteomic analysis highlights 50% down‐regulation pro‐inflammatory pro‐fibrotic pathways, suggesting controlled response conducive healing. study underscores potential bioelectrically active hydrogels as novel approach for treating wounds prone scarring.

Язык: Английский

---

Emerging Artificial Synaptic Devices Based on Organic Semiconductors: Molecular Design, Structure and Applications

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Янв. 9, 2025

In modern computing, the Von Neumann architecture faces challenges such as memory bottleneck, hindering efficient processing of large datasets and concurrent programs. Neuromorphic inspired by brain's architecture, emerges a promising alternative, offering unparalleled computational power while consuming less energy. Artificial synaptic devices play crucial role in this paradigm shift. Various material systems, from organic to inorganic, have been explored for neuromorphic devices, with materials attracting attention their excellent photoelectric properties, diverse choices, versatile preparation methods. Organic semiconductors, particular, offer advantages over transition-metal dichalcogenides, including ease flexibility, making them suitable large-area films. This review focuses on emerging artificial based discussing different branches within semiconductor system, various fabrication methods, device structure designs, applications synapse. Critical considerations achieving truly human-like dynamic perception systems semiconductors are also outlined, reflecting ongoing evolution computing.

Язык: Английский

---

Complementary logic-in-memory inverters integrating n-channel and p-channel ferroelectric organic transistors

Applied Physics Letters, Год журнала: 2025, Номер 126(8)

Опубликована: Фев. 1, 2025

The emerging logic-in-memory (LIM) technology is a promising strategy to overcome the von Neumann bottleneck in modern computers. For LIM circuits, complementary structure desirable for low-power consumption. To date, there have been rare reports on n-channel organic thin-film transistor nonvolatile memories (OTFT-NVMs), which indispensable building circuits. In this Letter, we demonstrate route achieve low-voltage operatable OTFT-NVMs, by blade-coating an ultrathin tetratetracontane buffer layer oxygen plasma treated ferroelectric terpolymer insulator with low coercive field. OTFT-NVMs exhibit good performances, high electron mobility over 0.1 cm2/V s, highly reliable endurance 1000 cycles, and stable retention 10 000 s. mechanism improving device performances discussed. Moreover, are also suitable p-channel OTFT-NVMs. Furthermore, architecture-based inverters constructed integrating can well perform logic memory operations at voltage of V. work laid foundation development

Язык: Английский

---

Induction of Synaptic Plasticity in Flexible Organic Synaptic Transistors with Cross‐Linked Polymer Dielectric

Advanced Materials Technologies, Год журнала: 2024, Номер unknown

Опубликована: Июнь 17, 2024

Abstract Controlled cross‐linking of polymer dielectric poly (4‐vinylphenol) (PVP) is demonstrated as an effective tool in enhancing the performance flexible organic synaptic transistors (OSTs). Investigation variation concentration agent methylated (melamine‐co‐formaldehyde) (PMCF) PVP bilayer combination with high‐ k hafnium oxide (HfO 2 ) gate devices shows that lower results better memory performance. OSTs 26% PMCF (by mass) exhibit excellent window > 4 V for GS sweep ±5 V, static retention ≈10 s, dynamic 500 cycles, and ≈125 continuous program/erase cycles. Pulse paired facilitation relaxation time constants 370 4670 ms respectively slow rapid phases regulating modulation amplitude ≈1 resemble a biological synapse. Through excitatory post current characteristics, spike timing dependant plasticity voltage are clearly observed, low energy consumption per on order 10 pJ. Further, by leveraging intricate interconnected data transfer computation phenomenon, “AND” logic effectively implemented using these OSTs. These exciting may open up new directions toward development hardware neuromorphic computing.

Язык: Английский

---

Enhanced Flexoelectric Response from Functionally Gradient Electrets Undergoing Crumpling Deformation

Acta Mechanica Solida Sinica, Год журнала: 2024, Номер 37(4), С. 541 - 554

Опубликована: Янв. 4, 2024

Язык: Английский

---

Simulation of neural functions based on organic semiconductor/MXene synaptic transistors

Organic Electronics, Год журнала: 2024, Номер 131, С. 107090 - 107090

Опубликована: Июль 6, 2024

Язык: Английский

---

Boosting the charge injection of polymer electrets for light-stimulated artificial synaptic transistors

Journal of Materials Chemistry C, Год журнала: 2024, Номер 12(35), С. 13797 - 13808

Опубликована: Янв. 1, 2024

We propose an effective method to enhance charge injection efficiency, thereby improving optical response, by incorporating N , ′-dioctyl-3,4,9,10-perylenetetracarboxylic diimide (C8-PTCDI) between a p-type semiconductor and electret layer.

Язык: Английский

---

Contact-Electro-Catalysis Through Electret Behavior to Facilitate Electron Transfer

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(32), С. 42293 - 42304

Опубликована: Авг. 5, 2024

Contact-electro-catalysis (CEC) usually uses polymer dielectrics as its catalysts under mechanical stimulation conditions, which although has a decent catalytic dye degradation effect still warrants performance improvement. A carrier separation promotion strategy based on an internal electric field by polarization can effectively improve ferroelectric material in photocatalysis and piezocatalysis. Therefore, necessary process of CEC also be promoted is largely expected to theoretically. However, the enhancement not been achieved experiment yet, because difficulty building inert dielectric. Herein, polytetrafluoroethylene (PTFE) dielectric was charged through electret process, believed establish for proved KPFM, XPS, triboelectric nanogenerator voltage output analysis. The fastest rate methyl orange reached over 90% at 1.5 h, while hydroxyl free radical (•OH) yield PTFE nearly three times that original PTFE. Density functional theory (DFT) calculations verified potential barrier interatomic electron transfer between H2O reduced 37% field. used herein optimize catalyst provides base use other general plastics facilitates production easily prepared, recyclable, inexpensive promote large-scale pollutant via CEC.

Язык: Английский

---