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Temperature-sensitive and solvent-resistance hydrogel sensor for ambulatory signal acquisition in“moist/hot environment”

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Nano Research 2023年第7期16卷 10348-10357页

作者： xinyu qu Hanjun Sun Xiaolong Kan Bing Lei Jinjun Shao Qian Wang Wenjun Wang Zhenhua Ni Xiaochen Dong Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) School of Physical and Mathematical SciencesNanjing Tech University(NanjingTech)Nanjing 211816China School of Physical Science and Information Technology Liaocheng UniversityLiaocheng 252059China School of Physics and Key Laboratory of MEMS of the Ministry of Education Southeast UniversityNanjing 211189China School of Chemistry&Materials Science Jiangsu Normal UniversityXuzhou 221116China

To realize continuously and stably work in a“moist/hot environment”,flexible electronics with excellent humid resistance,antiswelling,and detection sensitivity are demanding.Herein,a solvent-resistant and temperature-ultrasensitive hydrogel sensor was prepared by combining MXene and quaternized chitosan(QCS)with the binary polymer chain.The strong electrostatic interaction between the QCS chain and the poly(acrylic acid)(PAA)network endows the hydrogel stability against solvent erosion,high temperature,and high humidity.The strong dynamic interaction between MXene and polymer matrix significantly improves the mechanical properties and sensing(strain and temperature)sensitivity of the hydrogel.The hydrogel strain sensor exhibits a high gauge factor(5.53),temperature/humidity tolerance(equilibrium swelling ratio of 2.5%at 80℃),and excellent cycle stability,which could achieve a remote and accurate perception of complex human motion and environment fluctuation under aquatic conditions.Moreover,the hydrogel sensor exhibits impressive thermal response sensitivity(-3.183%/℃),ultrashort response time(<2.53 s),and a low detection limit(<0.5℃)in a wide temperature range,which is applied as an indicator of the body surface and ambient temperature.In short,this study broadens the application scenarios of hydrogels in persistent extreme thermal and wet environments.

关键词： flexible electronics hydrogel sensor solvent-resistance underwater application

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Thermal-sensitive ionogel with NIR-light controlled adhesion for ultrasoft strain sensor

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Nano Research 2023年第4期16卷 5464-5472页

作者： Bing Lei Longxue Cao xinyu qu Yunlong Liu Jinjun Shao Qian Wang Shuhong Li Wenjun Wang Xiaochen Dong School of Physical Science and Information Technology Liaocheng UniversityLiaocheng 252059China Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) School of Physical and Mathematical SciencesNanjing Tech University(NanjingTech)Nanjing 211816China School of Chemistry&Materials Science Jiangsu Normal UniversityXuzhou 221116China

With the widespread prevailing of flexible electronics in human-machine interfaces,health monitor,and human motion detection,ultrasoft flexible sensors are urgently desired with critical demands in conformality.Herein,a temperature-sensitive ionogel with near-infrared(NIR)-light controlled adhesion is prepared by electrostatic interaction of poly(diallyl dimethylammonium chloride)(PDDA)and acrylic acid,as well as the incorporation of the conductive polydopamine modified polypyrrole nanoparticles(PPy-PDA NPs).The PPy-PDA NPs could weaken the tough interaction between polymer chains and depress the Young’s modulus of the ionogel,thus promoting the ionogel ultrasoft(34 kPa)and highly stretchable(1,013%)performance to tensile deformations.In addition,the high photothermal conversion capacity of PPy-PDA NPs ensured the ionogel excellent NIR-light controlled adhesion and temperature sensitivity,which facilitated the ionogel on-demand removal and promised a reliable thermal sensor.Moreover,the resulted ultrasoft flexible sensor exhibited high sensitivity and stability to both strain and pressure in a broad range of deformations,enabling a precise monitoring on various human motions and physiological activities.The temperature-sensitive,ultrasoft,and controlled adhesive capabilities prompted great potential of the flexible ionogel in medical diagnosis and wearable electronics.

关键词： ultrasoft temperature-sensitive controllable adhesion photothermal effect flexible sensor

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Interactions of Indoleamine 2,3-dioxygenase-expressing LAMP3^(+) dendritic cells with CD4^(+) regulatory T cells and CD8^(+) exhausted T cells:synergistically remodeling of the immunosuppressive microenvironment in cervical cancer and therapeutic implications

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Cancer Communications 2023年第11期43卷 1207-1228页

作者： xinyu qu Yumeng Wang Qian Jiang Tingting Ren Chenyan Guo Keqin Hua Junjun Qiu Department of Gynecology Obstetrics and Gynecology HospitalFudan UniversityShanghaiP. R. China Shanghai Key Laboratory of Female Reproductive Endocrine-Related Diseases ShanghaiP. R. China

Background Cervical cancer(CC)is the fourth most common cancer in women worldwide.Although immunotherapy has been applied in clinical practice,its therapeutic efficacy remains far from satisfactory,necessitating further investigation of the mechanism of CC immune remodeling and exploration of novel treatment targets.This study aimed to investigate the mechanism of CC immune remodeling and explore potential therapeutic targets.Methods We conducted single-cell RNA sequencing on a total of 17 clinical specimens,including normal cervical tissues,high-grade squamous intraepithelial lesions,and CC tissues.To validate our findings,we conducted multicolor immunohistochemical staining of CC tissues and constructed a subcutaneous tumorigenesis model in C57BL/6 mice using murine CC cell lines(TC1)to evaluate the effectiveness of combination therapy involving indoleamine 2,3-dioxygenase 1(IDO1)inhibition and immune checkpoint blockade(ICB).We used the unpaired two-tailed Student's t-test,Mann-Whitney test,or Kruskal-Wallis test to compare continuous data between two groups and one-way ANOVA with Tukey's post hoc test to compare data between multiple groups.Results Malignant cervical epithelial cells did not manifest noticeable signs of tumor escape,whereas lysosomal-associated membrane protein 3-positive(LAMP3^(+))dendritic cells(DCs)in a mature state with immunoregulatory roles were found to express IDO1 and affect tryptophan metabolism.These cells interacted with both tumor-reactive exhausted CD8^(+)T cells and CD4^(+) regulatory T cells,synergistically forming a vicious immunosuppressive cycle and mediating CC immune escape.Further validation through multicolor immunohistochemical staining showed co-localization of neoantigen-reactive T cells(CD3^(+),CD4^(+)/CD8^(+),and PD-1^(+))and LAMP3+DCs(CD80^(+) and PD-L1^(+)).Additionally,a combination of the IDO1 inhibitor with an ICB agent significantly reduced tumor volume in the mouse model of CC compared with an ICB agent alone.Conclusions Our study suggested that a combinatio

关键词： cervical cancer dendritic cell immune checkpoint blockade immune escape indoleamine 2,3-dioxygenase 1 single-cell analysis T cell

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Ultradurable,freeze-resistant,and healable MXene-based ionic gels for multi-functional electronic skin

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Nano Research 2022年第5期15卷 4421-4430页

作者： Yao Lu xinyu qu Siying Wang Ye Zhao Yanfang Ren Wenli Zhao Qian Wang Chencheng Sun Wenjun Wang Xiaochen Dong Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) School of Physical and Mathematical SciencesNanjing Tech University(NanjingTech)30 South Puzhu RoadNanjing 211816China School of Physical Science and Information Technology Liaocheng UniversityLiaocheng 252059China School of Electronic and Information Engineering Changshu Institute of TechnologyChangshu 215500China

Hydrogel is a potential matrix material of electronic-skins(E-skins)because of its excellent ductility,tunability,and biocompatibility.However,hydrogel-based E-Skins will inevitably lose their sensing performance in practical applications for water loss,physical damage,and ambient interferences.It remains a challenge to manufacture highly durable gel-based E-skins.Herein,an E-Skin is fabricated by introducing ionic liquids(ILs)into MXene-composited binary polymer network.The obtained ionic gel shows excellent mechanical properties,strong adhesion,and superior tolerance to harsh environments.The E-skin exhibits high sensitivity to both strain and pressure in a wide range of deformations,which enables a monitoring function for various human motions and physiological activities.Importantly,the E-skin shows consistent electrical response after being stored in the open air for 30 days and can be quickly healed by irradiation with 808 nm near-infrared light,originating from the photo-thermal effect induced self-healing acceleration.It is noteworthy that the E-skin also reveals a highly sensitive perception of temperature and near-infrared light,displaying the promising potential applications in the multifunctional flexible sensor.

关键词： E-skins MXene environment resistance photothermal effect flexible sensor

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Highly Stretchable,Elastic,and Sensitive MXene-Based Hydrogel for Flexible Strain and Pressure Sensors

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Research 2020年第1期2020卷 270-282页

作者： Yao Lu xinyu qu Wen Zhao Yanfang Ren Weili Si Wenjun Wang Qian Wang Wei Huang Xiaochen Dong Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) School of Physical and Mathematical SciencesNanjing Tech University(NanjingTech)30 South Puzhu RoadNanjing 211800China School of Physical Science and Information Technology Liaocheng UniversityLiaocheng 252059China Shaanxi Institute of Flexible Electronics(SIFE) Northwestern Polytechnical University(NPU)Xi’an 710072China School of Chemistry and Materials Science Nanjing University of Information Science&TechnologyNanjing 210044China

Electronic skin is driving the next generation of cutting-edge wearable electronic products due to its good wearability and high accuracy of information acquisition.However,it remains a challenge to fulfill the requirements on detecting full-range human activities with existing flexible strain sensors.Herein,highly stretchable,sensitive,and multifunctional flexible strain sensors based on MXene-(Ti_(3)C_(2)T_(x)-)composited poly(vinyl alcohol)/polyvinyl pyrrolidone double-network hydrogels were prepared.The uniformly distributed hydrophilic MXene nanosheets formed a three-dimensional conductive network throughout the hydrogel,endowing the flexible sensor with high sensitivity.The strong interaction between the double-network hydrogel matrix and MXene greatly improved the mechanical properties of the hydrogels.The resulting nanocomposited hydrogels featured great tensile performance(2400%),toughness,and resilience.Particularly,the as-prepared flexible pressure sensor revealed ultrahigh sensitivity(10.75 kPa^(-1))with a wide response range(0-61.5 kPa),fast response(33.5 ms),and low limit of detection(0.87 Pa).Moreover,the hydrogel-based flexible sensors,with high sensitivity and durability,could be employed to monitor fullrange human motions and assembled into some aligned devices for subtle pressure detection,providing enormous potential in facial expression and phonation recognition,handwriting verification,healthy diagnosis,and wearable electronics.

关键词： toughness Elastic durability

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MXene-composited highly stretchable,sensitive and durable hydrogel for flexible strain sensors

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Chinese Chemical Letters 2021年第6期32卷 2021-2026页

作者： Wei Yuan xinyu qu Yao Lu Wen Zhao Yanfang Ren Qian Wang Wenjun Wang Xiaochen Dong Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) School of Physical and Mathematical SciencesNanjing Tech University(NanjingTech)Nanjing 211800China School of Physical Science and Information Technology Liaocheng UniversityLiaocheng 252059China School of Chemistry and Materials Science Nanjing University of Information Science&TechnologyNanjing 210044 China

The flourishing development in flexible electronics has provoked intensive research in flexible strain sensors to realize accurate perception acquisition under different external stimuli.However,building hydrogel-based strain sensors with high stretchability and sensitivity remains a great challenge.Herein,MXene nanosheets were composited into polyacrylamide-sodium alginate matrix to construct mechanical robust and sensitive double networked hydrogel strain sensor.The hydrophilic MXene nanosheets formed strong interactions with the polymer matrix and endowed the hydrogel with excellent tensile properties(3150%),compliant mechanical strength(2.03 kPa^(-1)in Young’s Module)and long-lasting stability and fatigue resistance(1000 dynamic cycles under 1,600%strain).Due to the highly oriented MXene-based three dimensional conductive networks,the hydrogel sensor achieved extremely high tensile sensitivity(18.15 in gauge factor)and compression sensitivity(0.38 kPa^(-1)below 3 kPa).MXene hydrogel-based strain sensors also displayed negligible hysteresis in electromechanical performance,typical frequent-independent feature and rapid response time to external stimuli.Moreover,the sensor exhibited accurate response to different scales of human movements,providing potential application in speech recognition,expression recognition and handwriting verification.

关键词： Hydrogel MXene Strain sensor High stretchablity and sensitivity Durability

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基于改进Hough变换的消弧线圈接地配电网故障选线新方法

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中国电力 2024年第7期57卷 132-142页

作者：郭亮屈新宇王晓卫王毅钊田影张帆国网江西省电力有限公司电力科学研究院江西南昌330000 西安理工大学电气工程学院陕西西安710054 国网陕西省电力有限公司电力科学研究院陕西西安710100

针对配电网在电压过零点和高阻故障时刻选线不准确的问题,提出一种适用于谐振接地系统单相接地故障的选线新方法,利用优化后的变分模态分解对各馈线零序功率进行处理,遴选出与原始零序功率相关强度最高的本征模态函数IMF(k),将IMF(k)转... 详细信息

针对配电网在电压过零点和高阻故障时刻选线不准确的问题,提出一种适用于谐振接地系统单相接地故障的选线新方法,利用优化后的变分模态分解对各馈线零序功率进行处理,遴选出与原始零序功率相关强度最高的本征模态函数IMF(k),将IMF(k)转换为JPG格式的二维图像,再利用Hough变换检测技术,得到故障起始阶段IMF(k)的拟合直线及夹角;对各支路模态量拟合直线夹角进行比对处理,将最小综合相关系数值对应的馈线确定为故障馈线;仿真结果表明:该方法不受接地电阻、故障相角、噪声干扰、数据缺失等因素的影响,验证了所提方法的有效性。

关键词：单相接地故障二维图像 Hough变换综合相关系数故障选线

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Thermoresponsive Lignin-Reinforced Poly(Ionic Liquid)Hydrogel Wireless Strain Sensor

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Research 2021年第1期2021卷 1284-1295页

作者： xinyu qu Ye Zhao Zi’ang Chen Siying Wang Yanfang Ren Qian Wang Jinjun Shao Wenjun Wang Xiaochen Dong Key Laboratory of Flexible Electronics(KLOFE)and Institute of Advanced Materials(IAM) School of Physical and Mathematical SciencesNanjing Tech University(NanjingTech)Nanjing 211816China School of Physical Science and Information Technology Liaocheng UniversityLiaocheng 252059China

To meet critical requirements on flexible electronic devices,multifunctionalized flexible sensors with excellent electromechanical performance and temperature perception are required.Herein,lignin-reinforced thermoresponsive poly(ionic liquid)hydrogel is prepared through an ultrasound-assisted synthesized method.Benefitting from the electrostatic interaction between lignin and ionic liquid,the hydrogel displays high stretchability(over 1425%),excellent toughness(over 132 kPa),and impressive stress loading-unloading cyclic stability.The hydrogel strain sensor presents excellent electromechanical performance with a high gauge factor(1.37)and rapid response rate(198 ms),which lays the foundation for human body movement detection and smart input.Moreover,owing to the thermal-sensitive feature of poly(ionic liquid),the as-prepared hydrogel displays remarkable thermal response sensitivity(0.217℃^(-1))in body temperature range and low limit of detection,which can be applied as a body shell temperature indicator.Particularly,the hydrogel can detect dual stimuli of strain and temperature and identify each signal individually,showing the specific application in human-machine interaction and artificial intelligence.By integrating the hydrogel strain sensor into a wireless sensation system,remote motion capture and gesture identification is realized in real-time.

关键词： stability. method. gauge

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Uncovering hidden nodes and hidden links in complex dynamic networks

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Science China(Physics,Mechanics & Astronomy) 2024年第4期67卷 51-63页

作者： Zhaoyang Zhang xinyu Wang Haihong Li Yang Chen Zhilin qu Yuanyuan Mi Gang Hu Department of Physics School of Physical Science and TechnologyNingbo UniversityNingbo 315211China School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China Department of Medicine David Geffen School of MedicineUniversity of CaliforniaLos Angeles 90095USA Brainnetome Center and National Laboratory of Pattern Recognition Institute of AutomationChinese Academy of SciencesBeijing 100190China Department of Psychology Tsinghua UniversityBeijing 100084China Department of Physics Beijing Normal UniversityBeijing 100875China

Inferring network structures from available data has attracted much interest in network science;however,in many realistic networks,only some of the nodes are perceptible while others are hidden,making it a challenging task.In this work,we develop a method for reconstructing the network with hidden nodes and links,taking account of fast-varying noise and time-delay interactions.By calculating the correlations of available data with different derivative orders for multiple pairs of accessible nodes,analyzing and integrating the relationships between different correlations,and defining diverse hidden-node-related reconstruction motifs,we can effectively identify the hidden nodes and hidden links in the network.

关键词： networks and genealogical trees stochastic analysis methods time series analysis

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Distributed Adaptive Optimal Resource Allocation over Networks of Uncertain Nonlinear Multi-agent Systems

Distributed Adaptive Optimal Resource Allocation over Networ...

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第三十九届中国控制会议

作者： xinyu qu Xinghu Wang Haibo Ji Department of Automation University of Science and Technology of China

This paper studies the distributed optimal resource allocation problem of nonlinear networks having uncertain nonlinearities. A novel distributed adaptive optimal resource allocation algorithm comprising an auxiliary optimization dynamics and an adaptive stabilizer is proposed. By constructing certain Lyapunov function, it is proved that the proposed algorithm assures the convergence of system output to the desired optimization solution of the resource allocation problem even in the presence of uncertain nonlinearities.

关键词： Distributed resource allocation multi-agent system uncertain nonlinearity adaptive control

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