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Self-Healing,Self-Adhesive and Stable Organohydrogel-Based Stretchable Oxygen Sensor with High Performance at Room Temperature

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Nano-Micro Letters 2022年第3期14卷 257-275页

作者： Yuning Liang Zixuan Wu Yaoming Wei Qiongling Ding Meital Zilberman Kai Tao xi xie Jin Wu State key laboratory of Optoelectronic Materials and Technologies and the Guangdong Province key laboratory of Display Material and Technology School of Electronics and Information TechnologySun Yat-Sen UniversityGuangzhou 510275People’s Republic of China Department of biomedical engineering Faculty of EngineeringTel Aviv University69978 Tel AvivIsrael ministry of education key laboratory of Micro and Nano Systems for Aerospace Northwestern Polytechnical UniversityXi’an 710072People’s Republic of China

With the advent of the 5G era and the rise of the Internet of Things,various sensors have received unprecedented attention,especially wearable and stretchable sensors in the healthcare ***,a stretchable,self-healable,self-adhesive,and room-temperature oxygen sensor with excellent repeatability,a full concentration detection range(0-100%),low theoretical limit of detection(5.7 ppm),high sensitivity(0.2%/ppm),good linearity,excellent temperature,and humidity tolerances is fabricated by using polyacrylamide-chitosan(PAM-CS)double network(DN)organohydrogel as a novel transducing *** PAM-CS DN organohydrogel is transformed from the PAM-CS composite hydrogel using a facile soaking and solvent replacement *** with the pristine hydrogel,the DN organohydrogel displays greatly enhanced mechanical strength,moisture retention,freezing resistance,and sensitivity to ***,applying the tensile strain improves both the sensitivity and response speed of the organohydrogel-based oxygen ***,the response to the same concentration of oxygen before and after self-healing is basically the ***,we propose an electrochemical reaction mechanism to explain the positive current shift of the oxygen sensor and corroborate this sensing mechanism through rationally designed *** organohydrogel oxygen sensor is used to monitor human respiration in real-time,verifying the feasibility of its practical *** work provides ideas for fabricating more stretchable,self-healable,self-adhesive,and high-performance gas sensors using ion-conducting organohydrogels.

关键词： Stretchable oxygen sensors Organohydrogel Self-healing Self-adhesive Electrochemical reaction

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Parkinsonian oscillations and their suppression by closed-loop deep brain stimulation based on fuzzy concept

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Chinese Physics B 2022年第12期31卷 684-691页

作者： xi-Le Wei Yu-Lin Bai Jiang Wang Si-Yuan Chang Chen Liu School of Electrical and information engineering Tianjin UniversityTianjin 300072China

This paper provides an adaptive closed-loop strategy for suppressing the pathological oscillations of the basal ganglia based on a variable universe fuzzy *** pathological basal ganglia oscillations in the theta(4-9 Hz)and beta(12-35 Hz)frequency bands have been demonstrated to be associated with the tremor and rigidity/bradykinesia symptoms in Parkinson’s disease(PD).Although the clinical application of open-loop deep brain stimulation(DBS)is effective,the stimulation waveform with the fixed parameters cannot be self-adjusted as the disease progresses,and thus the stimulation effects go *** deal with this difficult problem,a variable universe fuzzy closed-loop strategy is proposed to modulate different PD *** establish a cortico-basal ganglia-thalamocortical network model to simulate pathological oscillations and test the control *** results suggest that the proposed closed-loop control strategy can accommodate the variation of brain states and symptoms,which may become an alternative method to administrate the symptoms in PD.

关键词： deep brain stimulation Parkinson’s disease basal ganglia closed-loop control variable universe fuzzy

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Cardiomyocyte electrical-mechanical synchronized model for high-content, dose-quantitative and time-dependent drug assessment

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Microsystems & Nanoengineering 2021年第2期7卷 131-142页

作者： Jiaru Fang xinwei Wei Hongbo Li Ning Hu xingxing Liu Dongxin Xu Tao Zhang Hao Wan Ping Wang xi xie The First Affiliated Hospital of Sun Yat-Sen university School of Electronics and Information TechnologyGuangdong Province Key Laboratory of Display Material and TechnologySun Yat-sen UniversityGuangzhou510006China Biosensor National Special laboratory Key Laboratory of Biomedical Engineering of Ministry of EducationDepartment of Biomedical EngineeringZhejiang UniversityHangzhou310027China State key laboratory of Transducer Technology Chinese Academy of SciencesShanghai200050China School of biomedical engineering Sun Yat-sen UniversityGuangzhou510006China

Cardiovascular diseases have emerged as a significant threat to human ***,drug development is a time-consuming and costly process,and few drugs pass the preclinical assessment of safety and *** existing patch-clamp,Ca2+imaging,and microelectrode array technologies in cardiomyocyte models for drug preclinical screening have suffered from issues of low throughput,limited long-term assessment,or inability to synchronously and correlatively analyze electrical and mechanical ***,we develop a high-content,dose-quantitative and time-dependent drug assessment platform based on an electrical-mechanical synchronized(EMS)biosensing *** microfabricated EMS can record both firing potential(FP)and mechanical beating(MB)signals from cardiomyocytes and extract a variety of characteristic parameters from these two signals(FP–MB)for further *** system was applied to test typical ion channel drugs(lidocaine and isradipine),and the dynamic responses of cardiomyocytes to the tested drugs were recorded and *** high-throughput characteristics of the system can facilitate simultaneous experiments on a large number of ***,a database of various cardiac drugs can be established by heat map analysis for rapid and effective screening of *** EMS biosensing system is highly promising as a powerful tool for the preclinical development of new medicines.

关键词： electrical consuming patch

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Atomic-level correlation between the electrochemical performance of an oxygen-evolving catalyst and the effects of CeO_(2) functionalization

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Nano Research 2022年第4期15卷 2994-3000页

作者： Yanyan Li Wen Luo Duojie Wu Qi Wang Jie Yin Pinxian xi Yongquan Qu Meng Gu xinyu Zhang Zhouguang Lu Zhiping Zheng School of Chemistry and Chemical engineering Harbin Institute of TechnologyHarbin 150001China Department of Chemistry Guangdong Provincial Key Laboratory of Energy Materials for Electric PowerSouthern University of Science and TechnologyShenzhen 518055China key laboratory of Energy Conversion and Storage Technologies(Southern university of Science and Technology) Ministry of EducationShenzhen 518055China Department of Materials Science and engineering Shenzhen Key Laboratory of Interfacial Science and Engineering of MaterialsSouthern University of Science and TechnologyShenzhen 518055China Department of Materials Science and engineering Guangdong Provincial Key Laboratory of Energy Materials for Electric PowerSouthern University of Science and TechnologyShenzhen 518055China key laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering Research Centre of Biomedical NanotechnologyLanzhou UniversityLanzhou 730000China School of Chemical engineering and Technology Center for Applied Chemical ResearchFrontier Institute of Science and TechnologyXi'an Jiaotong UniversityXi'an 710049China

Herein,we prepared a bimetallic layered double hydroxide(FeCo LDH)featuring a dandelion-like *** of CeO_(2)onto FeCo LDH produced interfaces between the functionalizing CeO_(2)and the parent *** electrochemical studies were carried *** potential,overpotential,and Tafel slope point to the superior oxygen-evolving performance of CeO_(2)-FeCo LDH with respect to FeCo LDH,therefore,demonstrating the merits of CeO_(2)*** electronic structures of Fe,Co,and Ce were analyzed by X-ray photoelectron spectroscopy(XPS)and electron energy loss spectroscopy(EELS)from which the increase of Co^(3+)and the concurrent lowering of Ce^(4+)were *** the use of CeO_(2)-FeCo LDH,accelerated formation at a sizably reduced potential of Co-OOH,one of the key intermediates preceding the release of O_(2)was observed by in situ Raman *** now have the atomic-level and location-specific evidence,the increase of the active Co^(3+)across the interface to correlate the enhanced catalytic performance with CeO_(2)functionalization.

关键词： CeO_(2)nanoparticles metal layered double hydroxides(LDHs) oxygen evolution reaction intermediate conversion

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Reliable Ge_(2)Sb_(2)Te_(5) based phase-change electronic synapses using carbon doping and programmed pulses

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Journal of Materiomics 2022年第2期8卷 382-391页

作者： Qiang Wang Gang Niu Ruobing Wang Ren Luo Zuo-Guang Ye Jinshun Bi xi Li Zhitang Song Wei Ren Sannian Song Electronic Materials Research laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic Science and EngineeringXi'an Jiaotong UniversityXi'an710049China State key laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and InformationTechnologyChinese Academy of Sciences865 Changning RoadShanghai200050China Department of Chemistry and 4D LABS Simon Fraser UniversityBurnabyBritish ColumbiaV5A 1S6Canada key laboratory of Microelectronics Device and Integrated Technology The Institute of Microelectronics of Chinese Academy of SciencesBeijing100029China university of Chinese Academy of Sciences Beijing100049China

Hardware electronic synapse and neuro-inspired computing system based on phase change random access memory(PCRAM)have attracted an extensive ***,due to the intrinsic asymmetric reversible phase transition,the defective weight update of PCRAM synapses in aspects of tuning range,linearity and continuity has long required a system-level complexity of circuits and *** cell-level improvements to a great extent may slim the system thus achieving efficient *** report in this work the great enhancement of Ge_(2)Sb_(2)Te_(5)(GST)based PCRAM synapses by combining materials engineering and pulse *** is found that carbon doping in GST retards the rate of phase changing thus increasing the controllability of the conductance,while non-linear programmable pulse excitations can eventually lead to a reliable synaptic potentiation and depression.A set of improved programmable pulse schemes for spike-timing dependent plasticity was then demonstrated,suggesting its potential superiority in flexible programming and reliable data *** methods and results are of great significance for implementing PCRAM electronic synapses and high-performance neuro-inspired computing.

关键词： Programmable synapse Synaptic simulation PCRAM C-doped Ge_(2)Sb_(2)Te_(5) Electronic synapse

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Nonreciprocal transition between two nondegenerate energy levels

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Photonics Research 2021年第5期9卷 879-886页

作者： XUNWEI XU YANJUN ZHAO HUI WANG AIxi CHEN YU-xi LIU key laboratory of Low-Dimensional Quantum Structures and Quantum Control of ministry of education Key Laboratory for Matter Microstructure and Function of Hunan ProvinceDepartment of Physics and Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China Department of Applied Physics East China Jiaotong UniversityNanchang 330013China key laboratory of Opto-electronic Technology Ministry of EducationBeijing University of TechnologyBeijing 100124China Center for Emergent Matter Science(CEMS) RIKENWakoSaitama 351-0198Japan Department of Physics Zhejiang Sci-Tech UniversityHangzhou 310018China Institute of Microelectronics Tsinghua UniversityBeijing 100084China Frontier Science Center for Quantum information Beijing 100084China

Stimulated emission and absorption are two fundamental processes of light–matter interaction, and the coefficients of the two processes should be equal. However, we will describe a generic method to realize the significant difference between the stimulated emission and absorption coefficients of two nondegenerate energy levels, which we refer to as a nonreciprocal transition. As a simple implementation, a cyclic three-level atom system, comprising two nondegenerate energy levels and one auxiliary energy level, is employed to show a nonreciprocal transition via a combination of synthetic magnetism and reservoir engineering. Moreover, a single-photon nonreciprocal transporter is proposed using two one-dimensional semi-infinite coupled-resonator waveguides connected by an atom with nonreciprocal transition effect. Our work opens up a route to design atom-mediated nonreciprocal devices in a wide range of physical systems.

关键词： transition. effect. reciprocal

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Monte Carlo Simulation of Scattered Light with Shear Waves Generated by Acoustic Radiation Force for Acousto-Optic Imaging

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Chinese Physics Letters 2012年第12期29卷 123-126页

作者： LU Ming-Zhu WU Yu-Peng SHI Yu GUAN Yu-Bo GUO xiao-Li WAN Ming-xi the key laboratory of biomedical information engineering of ministry of education Department of Biomedical EngineeringSchool of Life Science and TechnologyXi'an Jiaotong UniversityXi'an 710049

A Monte Carlo method of multiple scattered coherent light with the information of shear wave propagation in scattering media is *** established Monte-Carlo algorithm is mainly relative to optical phase variations due to the acoustic-radiation-force shear-wave-induced displacements of light *** the distributions and temporal behaviors of optical phase increments in probe locations are ***,shear wave speed is evaluated *** is noted that the phase increments exactly track the propagations of shear waves induced by focus-ultrasound radiation *** addition,attenuations of shear waves are demonstrated in simulation *** using linear regression processing,the shear wave speed,which is set to 2.1 m/s in simulation,is estimated to be 2.18 m/s and 2.35 m/s at time sampling intervals of 0.2 ms and 0.5 ms,respectively.

关键词： Shear propagation phase

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Propagation of Shear Waves Generated by Acoustic Radiation Force in Nondissipative Inhomogeneous Media

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Chinese Physics Letters 2012年第1期29卷 164-167页

作者： LU Ming-Zhu LIU Xue-Jin SHI Yu KANG Yan-Ni GUAN Yu-Bo WAN Ming-xi the key laboratory of biomedical information engineering of ministry of education Department of Biomedical EngineeringSchool of Life Science and TechnologyXi’an Jiaotong UniversityXi’an 710049

We concentrate on the nondissipative mechanism induced shear wave in inhomogenous *** shear wave equation of radiation force in inhomogeneous media is solved numerically with a finite-difference time-domain method.A rarely studied nondissipative mechanism of shear displacement due to a smooth medium inhomogeneity is *** is noted that unlike the dissipative effect,the nondissipative action on a localized inhomogeneity with its hardness parameter changing smoothly along the beam axis,compresses or stretches the focus *** shear waves in nondissipative inhomogeneous media remain the property of sharp turn with 100% peak positive displacement and 64% peak negative *** action is useful in discerning the water-like lesion.

关键词： method. dissipative inhomogeneous

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Altered relationship between thickness and intrinsic activity amplitude in generalized tonic–clonic seizures

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Science Bulletin 2016年第24期61卷 1865-1875页

作者： Wei Liao Jue Wang Ting Xu Zhiqiang Zhang Gong-Jun Ji Qiang Xu Zhengge Wang Fang Yang xi-Nian Zuo Anqi Qiu Yu-Feng Zang Guangming Lu Huafu Chen Department of Medical Imaging Jinling Hospital Nanjing University School of Medicine Nanjing 210002 China key laboratory for Neuroinformation of ministry of education Center for Information in BioMedicine School of Life Scienceand Technology University of Electronic Science and Technology of China Chengdu 610054 China Department of Psychology School of Education Hangzhou Normal University Hangzhou 310015 China Center for Cognition and Brain Disorders and the Affiliated Hospital Hangzhou Normal University Hangzhou 310015 China Zhejiang key laboratory for Research in Assessment of Cognitive Impairments Hangzhou 310015 China key laboratory of Behavioral Science and Magnetic Resonance Imaging Research Center Institute of Psychology Chinese Academy of Sciences Beijing 100101 China Department of Neurology The First Affiliated Hospital of Anhui Medical University Hefei 230022 China Department of Radiology Nanjing Drum Tower Hospital The Affiliated Hospital of Nanjing University Medical School Nanjing 210002 China Department of Neurology Jinling Hospital Nanjing University School of Medicine Nanjing 210002 China Department of biomedical engineering and Clinical Imaging Research Center National University of Singapore Singapore 117583 Singapore

A thinner cortex has higher potential for binding GABA receptor A which is associated with larger amplitudes of intrinsic brain activity(i BA). However, the relationship between cortical thickness and i BA is unknown in intact and epileptic brains. To this end, we investigated the relationship between cortical thickness measured by highresolution MRI and surface-based i BA derived from resting-state functional MRI in normal controls(n = 82) andpatients with generalized tonic–clonic seizures(GTCS)only(n = 82). We demonstrated that the spatial distribution of cortical thickness negatively correlated with surface-based i BA amplitude at both whole-brain and within independent brain functional networks. In GTCS patients,spatial coupling between thickness and i BA amplitude decreased in the default mode, dorsal attention, and somatomotor networks. In addition, the vertex-wise acrosssubject thickness–i BA amplitude correspondence altered in the frontal and temporal lobes as well as in the precuneus in GTCS patients. The relationship between these two modalities can serve as a brain-based marker for detecting epileptogenic changes.

关键词： Cortex thickness - Generalized tonicclonic seizures - Intrinsic brain activity amplitude -Morphometric-functional relationship ~ Resting state

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A wearable noncontact free-rotating hybrid nanogenerator for self-powered electronics

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InfoMat 2020年第6期2卷 1191-1200页

作者： Dongjie Jiang Han Ouyang Bojing Shi Yang Zou Puchuan Tan Xuecheng Qu Shengyu Chao Yuan xi Chaochao Zhao Yubo Fan Zhou Li CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijingChina Beijing Advanced Innovation Centre for biomedical engineering Key Laboratory for Biomechanics and Mechanobiology of Ministry of EducationSchool of Biological Science and Medical EngineeringBeihang UniversityBeijingChina School of Nanoscience and Technology University of Chinese Academy of SciencesBeijingChina Department of biomedical engineering School of Medical EngineeringFoshan UniversityFoshanChina

Self-powerability is a new trend in the development of portable *** biomechanical energy to power personal information electronics is of great *** this work,we report a wearable noncontact freerotating hybrid nanogenerator(WRG),which is constituted by a triboelectric nanogenerator and an electromagnetic generator.A continuous output over 2 seconds can be achieved during one instantaneous incentive by external force,which is improved by two orders of magnitude compared to other wearable nanogenerators due to its unique mechanical energy storage *** WRG can be integrated into shoes to generate an output energy of 14.68 mJ in each stepping,which meets the power requirements of most personal information *** wireless sensor,GPS,and smartphone can be powered by the WRG *** WRG is expected to be applied in self-powered information electronics extensively in the future.

关键词： electromagnetic generator hybrid nanogenerator self-powered electronics triboelectric nanogenerator wearable electronics

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