The enhancement of mobility has always been a research focus in the field of thin-film transistors(TFTs).In this paper,we report a method using ultra-thin HfO2to improve the electrical performance of indium gallium zi...The enhancement of mobility has always been a research focus in the field of thin-film transistors(TFTs).In this paper,we report a method using ultra-thin HfO2to improve the electrical performance of indium gallium zinc oxide(IGZO)TFTs.HfO2not only repairs the surface morphology of the active layer,but also increases the carrier concentration.When the thickness of the HfO_(2) film was 3 nm,the mobility of the device was doubled(14.9 cm^(2)·V^(-1)·s^(-1)→29.6 cm^(2)·V^(-1)·s^(-1)),and the device exhibited excellent logic device performance.This paper provides a simple and effective method to enhance the electrical performance of IGZO TFTs,offering new ideas and experimental foundation for research into high-performance metal oxide(MO)TFTs.展开更多
Increasing Internet of Things(IoT)device connectivity makes botnet attacks more dangerous,carrying catastrophic hazards.As IoT botnets evolve,their dynamic and multifaceted nature hampers conventional detection method...Increasing Internet of Things(IoT)device connectivity makes botnet attacks more dangerous,carrying catastrophic hazards.As IoT botnets evolve,their dynamic and multifaceted nature hampers conventional detection methods.This paper proposes a risk assessment framework based on fuzzy logic and Particle Swarm Optimization(PSO)to address the risks associated with IoT botnets.Fuzzy logic addresses IoT threat uncertainties and ambiguities methodically.Fuzzy component settings are optimized using PSO to improve accuracy.The methodology allows for more complex thinking by transitioning from binary to continuous assessment.Instead of expert inputs,PSO data-driven tunes rules and membership functions.This study presents a complete IoT botnet risk assessment system.The methodology helps security teams allocate resources by categorizing threats as high,medium,or low severity.This study shows how CICIoT2023 can assess cyber risks.Our research has implications beyond detection,as it provides a proactive approach to risk management and promotes the development of more secure IoT environments.展开更多
Aptamers are molecular recognition elements with high specificity that are selected from deoxyribonucleic acid/ribonucleic acid (DNA/RNA) library. Compared with the traditional protein recognition elements,aptamers ha...Aptamers are molecular recognition elements with high specificity that are selected from deoxyribonucleic acid/ribonucleic acid (DNA/RNA) library. Compared with the traditional protein recognition elements,aptamers have excellent properties such as cost-effective,stable,easy for synthesis and modification. In recent years,electrochemistry plays an important role in biosensor field because of its high sensitivity,high stability, fast response and easy miniaturization. Through the combination of these two technologies and our rational design,we constructed a series of biosensors and biochips that are simple,fast,cheap and miniaturized. Firstly,we designed an adenosine triphosphate (ATP) electrochemical biosensor based on the strand displacement strategy. We can detect as low as 10 nmol/L of ATP both in pure solution and complicated cell lysates. Secondly,we creatively split the aptamers into two fragments and constructed the sandwich assay platform only based on single aptamer sequence. We successfully transferred this design on biochips with multiple micro electrodes (6×6) and accomplished multiplex detection. In the fields of biochips and biocomputers,we designed several DNA logic gates with electric (electrochemical) signal as output which paves a new way for the development of DNA computer.展开更多
Two-dimensional van der Waals(2D vdW)material-based heterostructure devices have been widely studied for high-end electronic applications owing to their heterojunction properties.In this study,we demonstrate graphene(...Two-dimensional van der Waals(2D vdW)material-based heterostructure devices have been widely studied for high-end electronic applications owing to their heterojunction properties.In this study,we demonstrate graphene(Gr)-bridge heterostructure devices consisting of laterally series-connected ambipolar semiconductor/Gr-bridge/n-type molybdenum disulfide as a channel material for field-effect transistors(FET).Unlike conventional FET operation,our Gr-bridge devices exhibit nonclassical transfer characteristics(humped transfer curve),thus possessing a negative differential transconductance.These phenomena are interpreted as the operating behavior in two series-connected FETs,and they result from the gate-tunable contact capacity of the Gr-bridge layer.Multi-value logic inverters and frequency tripler circuits are successfully demonstrated using ambipolar semiconductors with narrow-and wide-bandgap materials as more advanced circuit applications based on non-classical transfer characteristics.Thus,we believe that our innovative and straightforward device structure engineering will be a promising technique for future multi-functional circuit applications of 2D nanoelectronics.展开更多
Since Moore's Law was proposed in the 1970s, the size of silicon(Si) transistors has continuously shrunk, significantly increasing the integration density and computational power of integrated circuits [1].
We present a scheme to realize the basic two-qubit logic gates such as the quantum phase gate and SWAP gate using a detuned microwave cavity interacting with three-level superconducting-quantum-interference-device （S...We present a scheme to realize the basic two-qubit logic gates such as the quantum phase gate and SWAP gate using a detuned microwave cavity interacting with three-level superconducting-quantum-interference-device （SQUID） qubit（s）, by placing SQUID（s） in a two-mode microwave cavity and using adiabatic passage methods. In this scheme, the two logical states of the qubit are represented by the two lowest levels of the SQUID, and the cavity fields are treated as quantized. Compared with the previous method, the complex procedures of adjusting tile level spacing of the SQUID and applying the resonant microwave pulse to the SQUID to create transformation are not required. Based on superconducting device with relatively long decoherence time and simplified operation procedure, the gates operate at a high speed, which is important in view of decoherence.展开更多
With the continual increase in switching speed and rating of power semiconductors, the switching voltage spike becomes a serious problem. This paper describes a new technique of driving pulse edge modulation for insul...With the continual increase in switching speed and rating of power semiconductors, the switching voltage spike becomes a serious problem. This paper describes a new technique of driving pulse edge modulation for insulated gate bipolar transistors(IGBTs). By modulating the density and width of the pulse trains, without regulating the hardware circuit, the slope of the gate driving voltage is controlled to change the switching speed. This technique is used in the driving circuit based on complex programmable logic devices(CPLDs), and the switching voltage spike of IGBTs can be restrained through software, which is easier and more flexible to adjust. Experimental results demonstrate the effectiveness and practicability of the proposed method.展开更多
Nucleic acids are natural macromolecules with the ability to store and transmit information based on the strict base-pairing principle.Beyond the natural nucleic acid double helixes,various DNA/RNA nanostructures with...Nucleic acids are natural macromolecules with the ability to store and transmit information based on the strict base-pairing principle.Beyond the natural nucleic acid double helixes,various DNA/RNA nanostructures with customized geometries and functionalities have been fabricated.Featured with programmability and sequence-dependent responsiveness,DNA/RNA nanostructures have been employed for the rational design and construction of logic devices.When stimulated by internal molecular triggers and/or external stimuli,these logic gate devices can operate at nanoscale level in complex biological environments,performing logic operations and producing corresponding outputs.In this minireview,we summarize the recent advances of nucleic acid logic devices,which are responsive to various stimuli,including DNA/RNA strands,metal ions,small molecules,peptides,proteins,photo-irradiation,pH changes,and so forth.The applications of these devices in biosensing and biofunction regulation are also included.In the last part of the present study,we discuss the remaining challenges and perspectives of nucleic acid logic devices.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.62441407)the Natural Science Basic Research Program of Shaanxi(Grant No.2024JCYBQN-0631)+1 种基金the Natural Science Foundation of Shaanxi Provincial Department of Education(Grant No.23JK0482)the Shaanxi Province Key R&D Program General Project-Industrial Field(Grant No.2024GX-YBXM-085)。
文摘The enhancement of mobility has always been a research focus in the field of thin-film transistors(TFTs).In this paper,we report a method using ultra-thin HfO2to improve the electrical performance of indium gallium zinc oxide(IGZO)TFTs.HfO2not only repairs the surface morphology of the active layer,but also increases the carrier concentration.When the thickness of the HfO_(2) film was 3 nm,the mobility of the device was doubled(14.9 cm^(2)·V^(-1)·s^(-1)→29.6 cm^(2)·V^(-1)·s^(-1)),and the device exhibited excellent logic device performance.This paper provides a simple and effective method to enhance the electrical performance of IGZO TFTs,offering new ideas and experimental foundation for research into high-performance metal oxide(MO)TFTs.
文摘Increasing Internet of Things(IoT)device connectivity makes botnet attacks more dangerous,carrying catastrophic hazards.As IoT botnets evolve,their dynamic and multifaceted nature hampers conventional detection methods.This paper proposes a risk assessment framework based on fuzzy logic and Particle Swarm Optimization(PSO)to address the risks associated with IoT botnets.Fuzzy logic addresses IoT threat uncertainties and ambiguities methodically.Fuzzy component settings are optimized using PSO to improve accuracy.The methodology allows for more complex thinking by transitioning from binary to continuous assessment.Instead of expert inputs,PSO data-driven tunes rules and membership functions.This study presents a complete IoT botnet risk assessment system.The methodology helps security teams allocate resources by categorizing threats as high,medium,or low severity.This study shows how CICIoT2023 can assess cyber risks.Our research has implications beyond detection,as it provides a proactive approach to risk management and promotes the development of more secure IoT environments.
基金100 Talents Program of Chinese Academy of SciencesNational Key Basic Research Program of China ("973"Program) (No. 2012CB932600)
文摘Aptamers are molecular recognition elements with high specificity that are selected from deoxyribonucleic acid/ribonucleic acid (DNA/RNA) library. Compared with the traditional protein recognition elements,aptamers have excellent properties such as cost-effective,stable,easy for synthesis and modification. In recent years,electrochemistry plays an important role in biosensor field because of its high sensitivity,high stability, fast response and easy miniaturization. Through the combination of these two technologies and our rational design,we constructed a series of biosensors and biochips that are simple,fast,cheap and miniaturized. Firstly,we designed an adenosine triphosphate (ATP) electrochemical biosensor based on the strand displacement strategy. We can detect as low as 10 nmol/L of ATP both in pure solution and complicated cell lysates. Secondly,we creatively split the aptamers into two fragments and constructed the sandwich assay platform only based on single aptamer sequence. We successfully transferred this design on biochips with multiple micro electrodes (6×6) and accomplished multiplex detection. In the fields of biochips and biocomputers,we designed several DNA logic gates with electric (electrochemical) signal as output which paves a new way for the development of DNA computer.
基金Y.T.L.acknowledges the financial support from the National Research Foundation of Korea(NRF)(No.NRF-2021R1C1C1005235)D.K.H.acknowledges the financial support from the Korea Institute of Science and Technology(KIST)Institution Program(No.2E31532).
文摘Two-dimensional van der Waals(2D vdW)material-based heterostructure devices have been widely studied for high-end electronic applications owing to their heterojunction properties.In this study,we demonstrate graphene(Gr)-bridge heterostructure devices consisting of laterally series-connected ambipolar semiconductor/Gr-bridge/n-type molybdenum disulfide as a channel material for field-effect transistors(FET).Unlike conventional FET operation,our Gr-bridge devices exhibit nonclassical transfer characteristics(humped transfer curve),thus possessing a negative differential transconductance.These phenomena are interpreted as the operating behavior in two series-connected FETs,and they result from the gate-tunable contact capacity of the Gr-bridge layer.Multi-value logic inverters and frequency tripler circuits are successfully demonstrated using ambipolar semiconductors with narrow-and wide-bandgap materials as more advanced circuit applications based on non-classical transfer characteristics.Thus,we believe that our innovative and straightforward device structure engineering will be a promising technique for future multi-functional circuit applications of 2D nanoelectronics.
文摘Since Moore's Law was proposed in the 1970s, the size of silicon(Si) transistors has continuously shrunk, significantly increasing the integration density and computational power of integrated circuits [1].
文摘We present a scheme to realize the basic two-qubit logic gates such as the quantum phase gate and SWAP gate using a detuned microwave cavity interacting with three-level superconducting-quantum-interference-device （SQUID） qubit（s）, by placing SQUID（s） in a two-mode microwave cavity and using adiabatic passage methods. In this scheme, the two logical states of the qubit are represented by the two lowest levels of the SQUID, and the cavity fields are treated as quantized. Compared with the previous method, the complex procedures of adjusting tile level spacing of the SQUID and applying the resonant microwave pulse to the SQUID to create transformation are not required. Based on superconducting device with relatively long decoherence time and simplified operation procedure, the gates operate at a high speed, which is important in view of decoherence.
基金Project supported by the National Natural Science Foundation of China(No.51177147)the Zhejiang Key Science and Technology Innovation Group Program,China(No.2010R50021)
文摘With the continual increase in switching speed and rating of power semiconductors, the switching voltage spike becomes a serious problem. This paper describes a new technique of driving pulse edge modulation for insulated gate bipolar transistors(IGBTs). By modulating the density and width of the pulse trains, without regulating the hardware circuit, the slope of the gate driving voltage is controlled to change the switching speed. This technique is used in the driving circuit based on complex programmable logic devices(CPLDs), and the switching voltage spike of IGBTs can be restrained through software, which is easier and more flexible to adjust. Experimental results demonstrate the effectiveness and practicability of the proposed method.
基金National Natural Science Foundation of China,Grant/Award Numbers:22025201,21721002,32071389,21773044,51761145044K.C.Wong Education Foundation,Grant/Award Number:GJTD-2018-03+2 种基金Youth Innovation Promotion Association,CAS,Grant/Award Number:QYZDBSSW-SLH029Beijing Municipal Science&Technology Commission,Grant/Award Number:Z191100004819008National Basic Research Program of China,Grant/Award Numbers:2018YFA0208900,2016YFA0201601。
文摘Nucleic acids are natural macromolecules with the ability to store and transmit information based on the strict base-pairing principle.Beyond the natural nucleic acid double helixes,various DNA/RNA nanostructures with customized geometries and functionalities have been fabricated.Featured with programmability and sequence-dependent responsiveness,DNA/RNA nanostructures have been employed for the rational design and construction of logic devices.When stimulated by internal molecular triggers and/or external stimuli,these logic gate devices can operate at nanoscale level in complex biological environments,performing logic operations and producing corresponding outputs.In this minireview,we summarize the recent advances of nucleic acid logic devices,which are responsive to various stimuli,including DNA/RNA strands,metal ions,small molecules,peptides,proteins,photo-irradiation,pH changes,and so forth.The applications of these devices in biosensing and biofunction regulation are also included.In the last part of the present study,we discuss the remaining challenges and perspectives of nucleic acid logic devices.
