June 2024
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Publications (33)
May 2024
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7 Reads
The logic circuit is the main component of an integrated circuit chip that dictates the operation and performance of the chip. The logic circuit based on a memristor can improve the integration and operation speed of the existing integrated circuit and reduce the chip size and the number of devices used by a single logic circuit. However, most of the research on logic circuits based on memristors has focused only on simulations, and research on the realization of logic circuits by hardware using actual memristors is limited. In this paper, a memristor based on graphene oxide with stable complementary resistive switching characteristics is fabricated, a logic circuit is built by using this device, and the logic functions of “IMP,” “AND,” and “NOR” are successfully realized. The complementary resistive switching device can alleviate the severe power loss caused by the memory separation of the von Neumann architecture. Moreover, its unique structure enables it to realize material logic independently without the use of multiple memristors and resistors, providing a new scheme for the physical realization of logic circuits. It also opens up a new path for integrated chips to break through von Neumann architecture.
March 2024
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17 Reads
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1 Citation
Owing to the highly parallel network structure of the biological neural network and its triggered processing mode, tactile sensory neurons can realize the perception of external signals and the functions of perception, memory, and data processing by adjusting the synaptic weight. In this paper, a piezoresistive pressure sensor is combined with a memristor to design an artificial tactile sensory neuron. The polyurethane sponge sensor has excellent sensitivity and can convert physical stimuli into electrical signals, and the chitosan‐based memristor has stable bipolar resistive switching characteristics, allowing further information to be memorized and processed. The neuron can respond to tactile stimuli of different degrees, durations, and frequencies; realize potentiation/depression modulation, paired‐pulse facilitation, and spike‐timing‐dependent plasticity; exhibit spike‐rate‐dependent plasticity; and store and erase tactile information through memistor state switching, which has great application potential in biological sensing systems.
December 2023
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14 Reads
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1 Citation
The realization of artificial synapses based on biomaterials is of great significance for the development of environmentally friendly neuromorphic hardware systems and artificial intelligence. In this sense, a bioartificial synapse composited with egg albumen (EA) and multiwalled carbon nanotubes (MWCNTs) is fabricated. Based on the adjustable weight of the artificial synapse, the plasticity of electrical synapses is explored. Due to the photogenerated carriers and thermoelectric effects of carbon nanotubes, the device has optoelectronic properties, so the optoelectronic synaptic plasticity of the device is explored under light pulses. The device is well suited for biological synapses and shows great potential for applications in future high‐density storage and neuromorphic computing systems. In addition, to further study the physical mechanism of the conductive process of the device, the electrical characteristics of the contact interface between carbon nanotubes doped with Fe substitution and the upper electrode Al are mainly analyzed by first principles, and the adsorption, charge distribution, and band structure between them are theoretically studied.
December 2023
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11 Reads
ACS Sensors
December 2023
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3 Reads
Applied Materials Today
November 2023
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23 Reads
By doping a dielectric layer material and improving the device’s structure, the electrical characteristics of a memristor can be effectively adjusted, and its application field can be expanded. In this study, graphene quantum dots are embedded in the dielectric layer to improve the performance of a starch-based memristor, and the PMMA layer is introduced into the upper and lower interfaces of the dielectric layer. The experimental results show that the switching current ratio of the Al/starch: GQDs/ITO device was 102 times higher than that of the Al/starch/ITO device. However, the switching current ratio of the Al/starch: GQDs/ITO device was further increased, and the set voltage was reduced (−0.75 V) after the introduction of the PMMA layer. The introduction of GQDs and PMMA layers can regulate the formation process of conductive filaments in the device and significantly improve the electrical performance of the memristor.
November 2023
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33 Reads
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1 Citation
As artificial synapse devices, memristors have attracted widespread attention in the field of neuromorphic computing. In this paper, Al/polymethyl methacrylate (PMMA)/egg albumen (EA)–graphene quantum dots (GQDs)/PMMA/indium tin oxide (ITO) electrically/optically tunable biomemristors were fabricated using the egg protein as a dielectric layer. The electrons in the GQDs were injected from the quantum dots into the dielectric layer or into the adjacent quantum dots under the excitation of light, and the EA–GQDs dielectric layer formed a pathway composed of GQDs for electronic transmission. The device successfully performed nine brain synaptic functions: excitatory postsynaptic current (EPSC), paired-pulse facilitation (PPF), short-term potentiation (STP), short-term depression (STD), the transition from short-term plasticity to long-term plasticity, spike-timing-dependent plasticity (STDP), spike-rate-dependent plasticity (SRDP), the process of learning, forgetting, and relearning, and Pavlov associative memory under UV light stimulation. The successful simulation of the synaptic behavior of this device provides the possibility for biomaterials to realize neuromorphic computing.
October 2023
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11 Reads
ACS Applied Electronic Materials
September 2023
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8 Reads
Citations (20)
... Von Neumann architecture faces limitations in meeting the growing demands of advanced computing such as computational power, and scalability owing to the conventional interfaces that relies on data buses for communication [1,2]. Neuromorphic computing addresses these constraints by introducing a network of artificial neurons and synapses, mimicking the functional mechanism of human brain [2,3]. ...
- Citing Article
- Full-text available
November 2023
... In addition, the frequent data transfers between the processor and the memory also cause huge energy consumption. Therefore, how to solve the Von Neumann bottleneck and improve the data processing capability of computers has become a key issue in the field of information science [1]. Currently, the main approaches are to increase data storage capacity and to develop new computational storage architectures. ...
- Citing Article
June 2023
Physical Chemistry Chemical Physics
... Pt is an ideal metal for fabricating inert electrodes for its excellent conductivity and chemical stability, while GQDs exhibit good conductivity, chemical inertness, and low biological toxicity. [22][23][24][25][26][27][28][29] The GQDs, prepared by a citric acid pyrolysis method, have a size of approximately 4 nm. 30 Finite element analysis indicates that the ultra-small lateral size of GQDs will concentrate the surrounding electric field, causing Ag þ ions to migrate toward the quantum dots and leading to a more concentrated formation of conducting filaments. ...
- Citing Article
January 2023
New Journal of Chemistry
... 5 Recently, numerous efforts have been made in the realm of exploring various functionalized artificial synapses. 6,7 A prime consideration toward that is to take advantage of advanced memristors based on potential materials and an innovative device structure with appropriate physical properties, such as two-dimensional (2D) layered materials, low dimensional quantum dots (QDs), and biomaterials. [8][9][10] A recent trend in neuromorphic engineering is significantly tied to the utilization of biomaterial-based devices. ...
- Citing Article
- Full-text available
February 2023
... Natural biomaterials, such as proteins and sugars, have attracted interest as the dielectric layer of memristors for nonvolatile memory and artificial synaptic devices due to their environmentally friendly nature while also being biodegradable and sustainable, [6][7][8][9][10][11][12] posing a potential solution to reduce electronic waste. Among these biomaterials, honey, a mixture of mono-, di-, and polysaccharides, is a natural preservative and is abundant, sustainable, and dissolvable. ...
- Citing Article
February 2023
ACS Sustainable Chemistry & Engineering
... In addition, threshold switching memristors can also be used to emulate the functions of biological synapses [22][23][24][25]. Sun et al reported Co-Ni layered, double hydroxide-based memristors, which were used to emulate synaptic functions in biology, including short-term plasticity (STP), long-term plasticity (LTP), paired-pulse facilitation (PPF), and spiking-timing-dependent plasticity (STDP) [25]. ...
- Citing Article
- Publisher preview available
January 2023
... This device can realize complete memory logic blocks containing NOT, OR, and AND gates (Figure 10f). Wang et al. further explored egg albumen's application in a logic circuit [109]. With the configuration of Al/PMMA/egg albumen:Au nanoparticles/PMMA/Al, the ON-OFF ratio is enhanced dramatically, to 2.86 × 10 5 , compared with the device without PMMA as insulating layer. ...
- Citing Article
December 2022
Applied Physics Letters
... Pt is an ideal metal for fabricating inert electrodes for its excellent conductivity and chemical stability, while GQDs exhibit good conductivity, chemical inertness, and low biological toxicity. [22][23][24][25][26][27][28][29] The GQDs, prepared by a citric acid pyrolysis method, have a size of approximately 4 nm. 30 Finite element analysis indicates that the ultra-small lateral size of GQDs will concentrate the surrounding electric field, causing Ag þ ions to migrate toward the quantum dots and leading to a more concentrated formation of conducting filaments. ...
- Citing Article
- Full-text available
November 2022
... Pt is an ideal metal for fabricating inert electrodes for its excellent conductivity and chemical stability, while GQDs exhibit good conductivity, chemical inertness, and low biological toxicity. [22][23][24][25][26][27][28][29] The GQDs, prepared by a citric acid pyrolysis method, have a size of approximately 4 nm. 30 Finite element analysis indicates that the ultra-small lateral size of GQDs will concentrate the surrounding electric field, causing Ag þ ions to migrate toward the quantum dots and leading to a more concentrated formation of conducting filaments. ...
- Citing Article
- Full-text available
October 2022
... The device showed a large switching-current ratio, a long retention time, and a stable cycle durability [46]. It is worth studying the use of biological memristors to further realize artificial synapses and artificial neurons [47][48][49][50]. ...
- Citing Article
- Full-text available
October 2022