NiO/ZnO Nanocomposites for Multimodal Intelligent MEMS Gas Sensors

ACS Sensors, Год журнала: 2025, Номер unknown

Опубликована: Март 24, 2025

Gas sensor arrays designed for pattern recognition face persistent challenges in achieving high sensitivity and selectivity multiple volatile organic compounds (VOCs), particularly under varying environmental conditions. To address these limitations, we developed multimodal intelligent MEMS gas sensors by precisely tailoring the nanocomposite ratio of NiO ZnO components. These demonstrate enhanced responses to ethylene glycol (EG) limonene (LM) at different operating temperatures, demonstrating material-specific selectivity. Additionally, a multitask deep learning model is employed real-time, quantitative detection VOCs, accurately predicting their concentration type. results showcase effectiveness combining material optimization with advanced algorithms real-world VOCs detection, advancing field odor analysis tools.

Язык: Английский

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Reservoir computing and photoelectrochemical sensors: A marriage of convenience

Coordination Chemistry Reviews, Год журнала: 2023, Номер 487, С. 215155 - 215155

Опубликована: Апрель 11, 2023

Язык: Английский

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Neuromorphic Computing for Smart Agriculture

Agriculture, Год журнала: 2024, Номер 14(11), С. 1977 - 1977

Опубликована: Ноя. 4, 2024

Neuromorphic computing has received more and attention recently since it can process information interact with the world like human brain. Agriculture is a complex system that includes many processes of planting, breeding, harvesting, processing, storage, logistics, consumption. Smart devices in association artificial intelligence (AI) robots Internet Things (IoT) systems have been used also need to be improved accommodate growth computing. great potential promote development smart agriculture. The aim this paper describe current principles neuromorphic technology, explore examples applications agriculture, consider future route synapses, neurons, neural networks (ANNs). A expected improve agricultural production efficiency ensure food quality safety for nutrition health agriculture future.

Язык: Английский

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Modulating the majority charge carrier type and performance of organic heterojunction ammonia sensors by increasing peripheral fluorination of the silicon phthalocyanine sublayer

Sensors and Actuators B Chemical, Год журнала: 2024, Номер 408, С. 135507 - 135507

Опубликована: Фев. 16, 2024

Silicon phthalocyanines (R2-SiPcs) are an emerging class of high-performance organic semiconductors which have recently found application in highly sensitive and selective bilayer heterojunction devices for ammonia (NH3) sensing. We report based on axially-substituted bis(pentafluorophenoxy)silicon increasing peripheral fluorination ((F5PhO)2-FXSiPc) as a bottom layer lutetium bis-phthalocyanine (LuPc2) demonstrate how increased changes device operation from p-type to n-type response NH3. Sensors fabricated with (F5PhO)2-F16SiPc exhibits the smallest apparent energy barrier interfacial charge transport by impedance spectroscopy due better alignment semiconductor molecular orbitals semi-occupied orbital LuPc2. Bilayer all demonstrated LOD below 1 ppm (F5PhO)2-SiPc/LuPc2 yielding 307 ppb sensitivity -0.72%·ppm-1. Postdeposition thermal annealing is shown further enhance sensor performance two-fold increase -1.15%·ppm-1 198 ppb.

Язык: Английский

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Autonomous Artificial Olfactory Sensor Systems with Homeostasis Recovery via a Seamless Neuromorphic Architecture

Advanced Materials, Год журнала: 2024, Номер 36(29)

Опубликована: Май 1, 2024

Neuromorphic olfactory systems have been actively studied in recent years owing to their considerable potential electronic noses, robotics, and neuromorphic data processing systems. However, conventional gas sensors typically the ability detect hazardous levels but lack synaptic functions such as memory recognition of accumulation, which are essential for realizing human-like sensory system. In this study, a seamless architecture system capable detecting memorizing present level accumulation status nitrogen dioxide (NO

Язык: Английский

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Biomimetic Eu@HOF Photoactivated Sponge as Ultrasensitive Auditory and Olfactory Sensor for Infrasound Wave Monitoring and Bimodal Information Integration

Advanced Functional Materials, Год журнала: 2024, Номер 34(32)

Опубликована: Март 6, 2024

Abstract The combination of multisensory stimuli in the somatosensory system enables humans to understand object comprehensive characteristics and make precise judgments. However, development auditory–olfactory bimodal flexible biomimetic sensors (FBSs) mimic function biological perception external still presents complex challenges. Herein, an FBS ( 1 2 ) is fabricated based on hydrogen‐bonded organic framework (Eu@HOF‐BPTC) integrated with melamine sponge. During auditory sensing process, can monitor sound a maximum response frequency 400 Hz. performs ultrahigh sensitivity (41335.995 cps Pa −1 cm −2 ), precision (relative standard deviation < 0.20%), ultrafast time (20 ms), ultralow detection limit (1.1039 Hz 0.1083 dB), great recyclability (148 cycles), which also real‐time infrasound waves within 4–20 Based artificial intelligence, as olfactory demonstrates excellent ppm‐level desirable selectivity toward four odor molecules realizes wearable on‐site detection. completes signals integration interoperability by means human–machine interaction. highly promising for implementing interaction, simulating neural system, promoting environmental monitoring, disaster warning health care.

Язык: Английский

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Insulating Electrets Converted from Organic Semiconductor for High‐Performance Transistors, Memories, and Artificial Synapses

Advanced Functional Materials, Год журнала: 2023, Номер 33(45)

Опубликована: Авг. 7, 2023

Abstract Electrets are commonly used charged insulators that generate a quasi‐permanent electric field. However, when conventional electrets come into direct contact with semiconductors, the energy level mismatch at interface results in low memory speed and high consumption of electret devices due to both charge injection storage being non‐conducive. To address this, n‐type semiconductor N,N′‐dioctyl‐3,4,9,10‐perylene tetracarboxylic diimide (C 8 ‐PTCDI) is converted C ‐PTCDI (D) via oxygen degradation. The resulting electrets, using an field and/or light, retain semiconductors facilitate trapping. They also exhibit deeper trap levels increased density, thereby enhancing sheet density (7.47 × 10 12 cm −2 ). As result, based on demonstrate lower operation voltage (2 V) transistors, (20 memories, (3.5 fJ per spike) artificial synapses compared those without electrets.

Язык: Английский

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Energy Efficient Artificial Olfactory System with Integrated Sensing and Computing Capabilities for Food Spoilage Detection

Advanced Science, Год журнала: 2023, Номер 10(30)

Опубликована: Авг. 31, 2023

Artificial olfactory systems (AOSs) that mimic biological are of great interest. However, most existing AOSs suffer from high energy consumption levels and latency issues due to data conversion transmission. In this work, an energy- area-efficient AOS based on near-sensor computing is proposed. The efficiently integrates array sensing units (merged field effect transistor (FET)-type gas sensors amplifier circuits) AND-type nonvolatile memory (NVM) array. signals the directly connected NVM computed in memory, meaningful linear combinations output as bit line currents. designed detect food spoilage by employing thin zinc oxide films gas-sensing materials, it exhibits low detection limits for H

Язык: Английский

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Facile Fabrication of Heterogeneous Olfactory Sensing Array via Thermal Manipulation of A Single Sr─Fe─O Perovskite Precursor

Advanced Functional Materials, Год журнала: 2024, Номер 34(33)

Опубликована: Март 31, 2024

Abstract The electronic nose aims to emulate the olfactory capabilities of osmatic animals, utilizing sensing array with different characteristics perceive odors. However, separate precursors and preparation methods materials pose challenges in fabrication an array. In this work, customization surface crystal phase Sr─Fe─O (SFO) is demonstrated through control annealing temperature, enabling simple using a single precursor. Significantly, SFO exhibit diverse proportions phases, showcasing varied selective toward volatile organic compounds (VOCs). also demonstrate remarkable responsiveness, linearity, response/recovery times. Furthermore, study unraveles intricate gas‐sensor mechanism first principle calculations, revealing that Fe spin‐down d band center Sr 3 2 O 7 , located near Fermi level, significantly enhances binding strength intermediates, leading higher response specifically certain VOCs. Integrating these into unified device, sensor quantitatively discriminatively detected results indicate hold tremendous potential as promising easily manufacturable material system.

Язык: Английский

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Device‐Level in‐Sensor Olfactory Perception System Based on Array of PCBM‐MAPbI₃ Heterostructure Transistors

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Июль 29, 2024

Abstract Although there are significant advancements in device‐level artificial tactile and visual perception systems based on in‐sensor computing paradigms, the development of hardware‐implemented neuromorphic olfactory system is still its early stages. One primary challenges this field that most gas sensors lack capability to fuse sensing functions a single sensor. Through surface passivation interface engineering, work introduces utilizing array PCBM‐MAPbI 3 heterostructure transistors. Noteworthly, formation metastable intermediate phase NH PbI •MA can occur at room temperature be used store sensory information. Both pulse electrical dynamically modulate amount phase, then change channel conductance (weight), realizing fusion synaptic device. Based these excellent properties, spatiotemporal information diffusion encoded processed simultaneously. As result, an successfully demonstrated 5 × transistor array, which for detecting distance direction hazardous gas. This paves way future application real‐time data‐intensive machine‐olfactory system.

Язык: Английский

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