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Cellulose nanofiber enabled high-mass loading N-doped porous carbon electrode for zinc-ion supercapacitors

SUSTAINABLE MATERIALS AND TECHNOLOGIES 2024年 41卷

作者： Zhao, Zhen Hu, Yong-Peng Liu, Kai-Yang Yu, Wei Li, Guo-Xian Meng, Chui-Zhou Guo, Shi-Jie Hebei Univ Technol Hebei Key Lab Smart Sensing & Human Robot Interact 5340 Xiping Rd Tianjin 300401 Peoples R China Hebei Univ Technol Engn Res Ctr Minist Educ Intelligent Rehabil Equipment & Detect 5340 Xiping Rd Tianjin 300401 Peoples R China Hebei Univ Technol Sch Mech Engn 5340 Xiping Rd Tianjin 300401 Peoples R China

Zinc-ion hybrid supercapacitors (ZHSCs) are among the most promising electrochemical energy storage technologies because of their high energy density, environmental sustainability, low price, and inherent security. High-load, high-capacity cathodes are critical for the practical application of ZHSCs. However, it is challenging to achieve optimal performance of high-loading electrodes due to slow reaction kinetics, retarded ion transport, and structural instability. Herein, a salt-template technique was used to fabricate nitrogen-doped porous carbon (NPC) with large surface area, abundant mesopores, and electroactive nitrogen dopants. When combined with a fibrous network scaffold of carbon nanotubes and cellulose nanofibers (CNT/CNF), the optimized NPC delivered an outstanding specific capacitance of 133.4 mAh g-1 and a remarkable capacity retention of 95.4% after 10,000 cycles. More impressively, we achieved a cathode with high mass-loading of 10 mg cm-2 without significantly sacrificing the electrochemical performance (area capacity of 2.05 mAh cm-2 and good cycling stability with capacity retention of 86.2% after 3000 cycles). The excellent performance can be attributed to the continuous electron/ion conduction pathways of CNT/CNF scaffold and redox-active surface generated by the favorable heteroatom-doped porous carbon. In sum, this work offers a platform for making high mass-loading carbon electrodes for practical ZHSCs.

关键词： Zinc -ion hybrid supercapacitors Cellulose nanofiber Porous carbon Nitrogen doping

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Virtual Multiplexing Chamber-Based Digital PCR for Camel Milk Authentication Applications

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MICROMACHINES 2023年第8期14卷 1619-1619页

作者： Li, Jinchao Cheng, Jingmeng Li, Shanshan Wu, Jie Jayne Li, Junwei Hebei Univ Technol Sch Mech Engn Hebei Key Lab Smart Sensing & Human Robot Interact Tianjin 300130 Peoples R China Hebei Univ Technol State Key Lab Reliabil & Intelligence Elect Equip Tianjin 300130 Peoples R China Univ Tennessee Dept Elect Engn & Comp Sci Knoxville TN 37996 USA Hebei Univ Technol Inst Biophys Sch Hlth Sci & Biomed Engn Tianjin 300401 Peoples R China

In this work, we proposed a chamber-based digital PCR (cdPCR) microfluidic device that is compatible with fluorescence imaging systems for milk adulteration detection. The device enables the digitalization of PCR reagents, which are loaded into microchambers, and subsequent thermocycling for DNA amplification. Then, fluorescence images of the microchambers are captured and analyzed to obtain the total number of positive chambers, which is used to calculate the copy numbers of the target DNA, enabling accurate quantitative detections to determine intentional milk adulteration from accidental contaminations. The validation of this device is performed by camel milk authentication. We performed 25,600-chamber virtual multiplexing cdPCR tests using 40 x 40 chamber devices for the detection of DNA templates extracted from pure or mixed milk with different dilutions. Then, the cdPCR chip was used to authenticate blind milk samples, demonstrating its efficacy in real biotechnical applications.

关键词： microfluidics digital polymerase chain reaction camel authentication

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Study on Effect of Surface Micro-Texture of Cemented Carbide on Tribological Properties of Bovine Cortical Bone

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MICROMACHINES 2024年第8期15卷 994-994页

作者： Shang, Peng Liu, Bingfeng Guo, Chunhai Cui, Peijuan Hou, Zhanlin Jin, Fengbin Zhang, Jianjun Guo, Shijie Huang, Yuping Zhang, Wenwu Hebei Univ Technol Sch Mech Engn Hebei Key Lab Smart Sensing & Human Robot Interact Minist Educ Intelligent Rehabil Device & Detect Te Tianjin 300401 Peoples R China Chinese Acad Sci Ningbo Inst Mat Technol & Engn Ningbo 315201 Peoples R China Beijing Inst Precis Mechatron & Controls Beijing 100076 Peoples R China

In bone-milling surgical procedures, the intense friction between the tool and bone material often results in high cutting temperatures, leading to the thermal necrosis of bone cells. This paper aims to investigate the effect of micro-texture on the tribological properties of YG8 cemented carbide in contact with bone. The main objective is to guide the design of tool surface microstructures to reduce frictional heat generation. To minimize experimental consumables and save time, numerical simulations are first conducted to determine the optimal machining depth for the texture. Subsequently, micro-textures with different shapes and pitches are prepared on the surface of YG8 cemented carbide. These textured samples are paired with bovine cortical bone pins featuring various bone unit arrangements, and friction and wear tests are conducted under physiological saline lubrication. The experimental results indicate that the appropriate shape and pitch of the micro-texture can minimize the coefficient of friction. The parallel arrangement of bone units exhibits a lower coefficient of friction compared to the vertical arrangement. This study holds significant implications for the design and fabrication of future micro-texture milling cutters.

关键词： micro-texture fluid simulation cemented carbide bovine cortical bone friction coefficient

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Self-Healing, Reconfigurable, Thermal-Switching, Transformative Electronics for Health Monitoring

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ADVANCED MATERIALS 2023年第15期35卷 2207742-2207742页

作者： Yang, Li Wang, Zihan Wang, Hao Jin, Biqiang Meng, Chuizhou Chen, Xue Li, Runze Wang, He Xin, Mingyang Zhao, Zeshang Guo, Shijie Wu, Jinrong Cheng, Huanyu Hebei Univ Technol Sch Hlth Sci & Biomed Engn State Key Lab Reliabil & Intelligence Elect Equipm Tianjin 300130 Peoples R China Hebei Univ Technol Sch Mech Engn State Key Lab Reliabil & Intelligence Elect Equipm Hebei Key Lab Smart Sensing & Human Robot Interact Tianjin 300401 Peoples R China Sichuan Univ Coll Polymer Sci & Engn State Key Lab Polymer Mat Engn Chengdu 610065 Peoples R China Hebei Univ Technol Sch Elect Engn State Key Lab Reliabil & Intelligence Elect Equipm Key Lab Bioelectromagnet & Neuroengn Hebei Prov Tianjin 300130 Peoples R China Penn State Univ Dept Engn Sci & Mech University Pk PA 16802 USA

Soft, deformable electronic devices provide the means to monitor physiological information and health conditions for disease diagnostics. However, their practical utility is limited due to the lack of intrinsical thermal switching for mechanically transformative adaptability and self-healing capability against mechanical damages. Here, the design concepts, materials and physics, manufacturing approaches, and application opportunities of self-healing, reconfigurable, thermal-switching device platforms based on hyperbranched polymers and biphasic liquid metal are reported. The former provides excellent self-healing performance and unique tunable stiffness and adhesion regulated by temperature for the on-skin switch, whereas the latter results in liquid metal circuits with extreme stretchability (>900%) and high conductivity (3.40 x 10(4) S cm(-1)), as well as simple recycling capability. Triggered by the increased temperature from the skin surface, a multifunctional device platform can conveniently conform and strongly adhere to the hierarchically textured skin surface for non-invasive, continuous, comfortable health monitoring. Additionally, the self-healing and adhesive characteristics allow multiple multifunctional circuit components to assemble and completely wrap on 3D curvilinear surfaces. Together, the design, manufacturing, and proof-of-concept demonstration of the self-healing, transformative, and self-assembled electronics open up new opportunities for robust soft deformable devices, smart robotics, prosthetics, and Internet-of-Things, and human-machine interfaces on irregular surfaces.

关键词： liquid metal printed circuits multifunctional electronic devices self-healing films thermal-switching three-dimensional conformal self-assembly transformative characteristics

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Superhydrophobic, stretchable kirigami pencil-on-paper multifunctional device platform

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CHEMICAL ENGINEERING JOURNAL 2023年第1期465卷 142774页

作者： Xue, Ye Wang, Zihan Dutta, Ankan Chen, Xue Gao, Peng Li, Runze Yan, Jiayi Niu, Guangyu Wang, Ya Du, Shuaijie Cheng, Huanyu Yang, Li Hebei Univ Technol Sch Hlth Sci & Biomed Engn State Key Lab Reliabil & Intelligence Elect Equipm Tianjin 300130 Peoples R China Hebei Univ Technol Sch Mech Engn State Key Lab Reliabil & Intelligence Elect Equipm Hebei Key Lab Smart Sensing & Human Robot Interact Tianjin 300401 Peoples R China Penn State Univ Dept Engn Sci & Mech University Pk PA 16802 USA Hebei Univ Technol Sch Elect Engn State Key Lab Reliabil & Intelligence Elect Equipm Key Lab Bioelectromagnet & Neuroengn Hebei Prov Tianjin 300130 Peoples R China Hebei Univ Technol Dept Elect Informat Tianjin 300130 Peoples R China Hebei Univ Technol Dept Architecture & Art Tianjin 300130 Peoples R China

Wearable electronics with applications in healthcare, human-machine interfaces, and robotics often explore complex manufacturing procedures and are not disposable. Although the use of conductive pencil patterns on cellulose paper provides inexpensive, disposable sensors, they have limited stretchability and are easily affected by variations in the ambient environment. This work presents the combination of pencil-on-paper with the hydrophobic fumed SiO2 (Hf-SiO2) coating and stretchable kirigami structures from laser cutting to prepare a superhydrophobic, stretchable pencil-on-paper multifunctional sensing platform. The resulting sensor exhibits a large response to NO2 gas at elevated temperature from self-heating, which is minimally affected by the variations in the ambient temperature and relative humidity, as well as mechanical deformations such as bending and stretching states. The integrated temperature sensor and electrodes with the sensing platform can accurately detect temperature and electrophysiological signals to alert for adverse thermal effects and cardiopulmonary diseases. The thermal therapy and electrical stimulation provided by the platform can also deliver effective means to battle against inflammation/infection and treat chronic wounds. The superhydrophobic pencil-onpaper multifunctional device platform provides a low-cost, disposable solution to disease diagnostic confirmation and early treatment for personal and population health.

关键词： Superhydrophobic Pencil-on-paper Multiparameter sensing Thermal therapy and electrical stimulation Personal and population health monitoring

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Vanadium Oxide-Doped Laser-Induced Graphene Multi-Parameter Sensor to Decouple Soil Nitrogen Loss and Temperature

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ADVANCED MATERIALS 2023年第14期35卷 2210322-2210322页

作者： Yang, Li Yan, Jiayi Meng, Chuizhou Dutta, Ankan Chen, Xue Xue, Ye Niu, Guangyu Wang, Ya Du, Shuaijie Zhou, Peng Zhang, Cheng Guo, Shijie Cheng, Huanyu Hebei Univ Technol Sch Hlth Sci & Biomed Engn State Key Lab Reliabil & Intelligence Elect Equipm Tianjin 300130 Peoples R China Hebei Univ Technol Sch Mech Engn State Key Lab Reliabil & Intelligence Elect Equipm Hebei Key Lab Smart Sensing & Human Robot Interact Tianjin 300130 Peoples R China Penn State Univ Dept Engn Sci & Mech University Pk PA 16802 USA Hebei Univ Technol Sch Elect Engn State Key Lab Reliabil & Intelligence Elect Equipm Key Lab Bioelectromagnet & Neuroengn Hebei Prov Tianjin 300130 Peoples R China Hebei Univ Technol Sch Architecture & Art Tianjin 300130 Peoples R China Tianjin Tianzhong Yimai Technol Dev Co Ltd Tianjin 300384 Peoples R China Minjiang Univ Coll Mat & Chem Engn Fujian Key Lab Funct Marine Sensing Mat Fuzhou 350108 Peoples R China

Monitoring nitrogen utilization efficiency and soil temperature in agricultural systems for timely intervention is essential for crop health with reduced environmental pollution. Herein, this work presents a high-performance multi-parameter sensor based on vanadium oxide (VOX)-doped laser-induced graphene (LIG) foam to completely decouple nitrogen oxides (NOX) and temperature. The highly porous 3D VOX-doped LIG foam composite is readily obtained by laser scribing vanadium sulfide (V5S8)-doped block copolymer and phenolic resin self-assembled films. The heterojunction formed at the LIG/VOX interface provides the sensor with enhanced response to NOX and an ultralow limit of detection of 3 ppb (theoretical estimate of 451 ppt) at room temperature. The sensor also exhibits a wide detection range, fast response/recovery, good selectivity, and stability over 16 days. Meanwhile, the sensor can accurately detect temperature over a wide linear range of 10-110 degrees C. The encapsulation of the sensor with a soft membrane further allows for temperature sensing without being affected by NOX. The unencapsulated sensor operated at elevated temperature removes the influences of relative humidity and temperature variations for accurate NOX measurements. The capability to decouple nitrogen loss and soil temperature paves the way for the development of future multimodal decoupled electronics for precision agriculture and health monitoring.

关键词： multi-parameter sensors nitrogen loss and soil temperature monitoring precision agriculture vanadium oxide-doped laser-induced graphene foam

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Biomimetic breathable nanofiber electronic skins with temperature-controlled self-adhesive and directional moisture-wicking properties for bifunctional pressure and non-contact sensing

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NANO ENERGY 2024年第PartA期128卷

作者： Wang, Guoqing Duan, Jingle Sun, Guifen Wang, Peng Meng, Chuizhou Duan, Derong Zhang, Longxiao Kan, Hao Li, Yang Univ Jinan Sch Informat Sci & Engn Shandong Prov Key Lab Network Based Intelligent Co Jinan 250022 Peoples R China Hebei Univ Technol Hebei Key Lab Smart Sensing & Human Robot Interact State Key Lab Reliabil & Intelligence Elect Equipm Sch Mech EngnEngn Res CtrMinist Educ Intelligent Tianjin 300401 Peoples R China Univ Jinan Sch Mech Engn Jinan 250022 Peoples R China Shandong Univ Sch Integrated Circuits Jinan 250101 Peoples R China

Electronic skin has fast developed in recent years for its promising application in wearable sensing. Multifunction of breathability, self-adhesion, sweat release and diverse sensing is highly required but has not been achieved on a single device. Herein, inspired by natural human skin, we develop a breathable and self-adhesive electronic skin based on an all-nanofiber platform with unique directional moisture-wicking properties and bifunctional pressure and non-contact sensing capability. The multifunctional device is integrated with four functional parts self-adhesive gel, moisture-wicking structure, pressure sensing layer and non-contact detection layer. Benefits from structural design and advanced sensing principles, the sensor not only demonstrates high pressure-sensing sensitivity of 23 kPa-1 and ultrawide non-contact detection range of 2 m but also exhibits excellent breathability of 53.9 mm s-1 and fast moisture-wicking ability. Interestingly, the sensor can be tightly attached to human skin at skin temperature and be easily peeled off at elevated temperatures by using the temperature-controlled reversible phase-transition gel. Towards practical wearable sensing applications, different movements can be identified with 97.3 % accuracy by using the four-layer Multi-Layer Perceptron neural network. This work will boost the development of next-generation multifunctional electronic skins with both wearing comfortability and diverse sensing capability.

关键词： Electrospun nanofiber Non -contact sensor Pressure sensor Directional moisture wicking Electronic skin

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Fully stretchable, porous MXene-graphene foam nanocomposites for energy harvesting and self-powered sensing

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NANO ENERGY 2022年第PartA期103卷

作者： Yang, Li Liu, Chaosai Yuan, Wenjing Meng, Chuizhou Dutta, Ankan Chen, Xue Guo, Langang Niu, Guangyu Cheng, Huanyu Hebei Univ Technol Sch Hlth Sci & Biomed Engn State Key Lab Reliabil & Intelligence Elect Equip Tianjin 300130 Peoples R China Hebei Univ Technol Tianjin Key Lab Mat Laminating Fabricat & Interfa Sch Mat Sci & Engn Tianjin 300130 Peoples R China Hebei Univ Technol Sch Mech Engn State Key Lab Reliabil & Intelligence Elect Equip Hebei Key Lab Smart Sensing & Human Robot Interac Tianjin 300401 Peoples R China Penn State Univ Dept Engn Sci & Mech University Pk PA 16802 USA Hebei Univ Technol Sch Elect Engn State Key Lab Reliabil & Intelligence Elect Equip Key Lab Bioelectromagnet & Neuroengn Hebei Prov Tianjin 300130 Peoples R China Hebei Univ Technol Sch Architecture & Art Tianjin 300130 Peoples R China

The growing demand for intelligent wearable electronic devices has spurred the rapid developments of high-performance deformable power supplies such as triboelectric nanogenerators (TENGs) with high output performance. However, the intrinsically stretchable TENGs especially those prepared with low-cost manufacturing approaches still suffer from poor performance. To address the challenge, this paper presents a fully stretchable TENG consisting of an intrinsically stretchable MXene/silicone elastomer and silver nanowires (Ag NWs)graphene foam nanocomposite. The intrinsically stretchable TENG exhibits high output performance (voltage, current, and power of 73.6 V, 7.75 mu A, and 2.76 W m(-2)), long-term reliability, and stable electrical output under various extreme deformation conditions. In addition to the application on the human skin and clothing for human motion monitoring and detecting the strength training postures, the intrinsically stretchable TENG can also harvest the intermittent mechanical energy from human bodies to charge various energy storage units such as commercial capacitors for driving wearable electronic devices. The resulting systems have been demonstrated in applications from home anti-theft to water resources early warning systems, which provide the proof-of-the-concept demonstrations for the next-generation standalone device platforms.

关键词： Triboelectric nanogenerator (TENG) MXene-graphene foam nanocomposites Ag NWs/LIG composites Fully stretchable Energy harvesting and self-powered sensing

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A direct written strain-insensitive temperature sensor based on a multi-polygonal structure for human temperature monitoring

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NANO ENERGY 2024年第PartA期131卷

作者： Wang, Peng Li, Yurui Cao, Jinjing Sun, Guifen Shao, Haiyan Fu, Xiuli Meng, Ying Meng, Chuizhou Li, Yang Univ Jinan Sch Mech Engn Jinan 250022 Peoples R China Hebei Univ Technol Minist Educ Intelligent Rehabil Device & Detect Te Hebei Key Lab Smart Sensing & Human Robot Interact Engn Res CtrState Key Lab Reliabil & Intelligence Tianjin 300401 Peoples R China Shandong Agr & Engn Univ Sch Informat Sci & Engn Jinan 250100 Peoples R China Univ Jinan Sch Informat Sci & Engn Shandong Prov Key Lab Network Based Intelligent Co Jinan 250022 Peoples R China Shandong Univ Sch Integrated Circuits Jinan 250101 Peoples R China Fudan Univ State Key Lab Integrated Chips & Syst Shanghai 200433 Peoples R China

Flexible temperature sensors show great potential in human health monitoring. However, sensitive materials and substrates of the reported temperature sensors have weak stretchability, mechanical compliance and breathability, which weakened the sensing stability and wearing comfort. Herein, a stretchable printed straininsensitive temperature sensor based on a multi-polygonal structure was developed. The highly printable temperature-sensitive ink preparation adopted a coagulation-assisted strategy by using polyvinyl alcohol (PVA) polymer as binder, poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) and graphene (G) as temperature-sensitive materials. By designing the multi-polygonal structure, the temperature sensor shows excellent anti-strain ability (even at 40 % strain) and good compliance with elastic human skin. Owing to the PEDOT:PSS with high temperature-sensitivity, G with 2D structure and excellent thermal conductivity, thermoplastic polyurethane (TPU) nanofiber with microporous structure, the fabricated sensor has high sensitivity and fast response speed. Benefiting from the microchannel and hydrophobic properties of the nanofiber substrate, the sensor has outstanding breathability and sweat resistance, laying the foundation for long-term wear comfort. Meanwhile, an electromechanical system and 4x4 temperature array have been built and applied to monitor human temperature and recognize the temperature distribution of objects successfully. This study provides a practical and optimized method for real-time and stable monitoring of human health.

关键词： Wearable temperature sensor Multi-polygonal structure Strain-insensitive 3D printed Skin temperature monitoring

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Stretchable, ultrasensitive, and low-temperature NO2 sensors based on MoS2@rGO nanocomposites

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MATERIALS TODAY PHYSICS 2020年 15卷

作者： Yi, Ning Cheng, Zheng Li, Han Yang, Li Zhu, Jia Zheng, Xiaoqi Chen, Yong Liu, Zhendong Zhu, Hongli Cheng, Huanyu Penn State Univ Dept Mat Sci & Engn University Pk PA 16802 USA Penn State Univ Mat Res Inst University Pk PA 16802 USA Northeastern Univ Dept Mech & Ind Engn Boston MA 02115 USA Penn State Univ Dept Engn Sci & Mech 227 Hammond Bldg University Pk PA 16802 USA Xiamen Univ Pen Tung Sah Inst Micronano Sci & Technol Xiamen 361005 Fujian Peoples R China Southeast Inst Chinaunicom Fuzhou 350000 Fujian Peoples R China Hebei Univ Technol Sch Mech Engn Hebei Key Lab Robot Percept & Human Robot Interac Tianjin 300401 Peoples R China ShanghaiTech Univ Sch Phys Sci & Technol Shanghai 201219 Peoples R China Zhejiang Univ Technol Minist Educ & Zhejiang Prov Hangzhou 310014 Zhejiang Peoples R China

The recent development of 3D highly porous laser-induced graphene (LIG) has drawn significant attention for numerous sensing applications. In particular, novel gas sensing platforms based on stretchable LIG patterns with self-heating capabilities have been demonstrated as a simple alternative to interdigitated electrodes (IDEs) for integrating gas-sensitive nanomaterials. However, their direct performance comparison with the IDEs is unclear. In this paper, the sensing performance of nanomaterials with various specific surface areas between the LIG patterns and IDEs are compared directly. Molybdenum disulfide (MoS2) @ reduced graphene oxide (rGO) was synthesized with controllable size and morphology for nitrogen dioxide (NO2) sensing. When dispersing MoS2@rGO on an IDE integrated on a soft silicone polymeric substrate, the stretchable gas sensor exhibited mechanical robustness upon stretching and a significantly large signal-to-noise ratio (SNR) for rapid detection of 10 ppb NO2. The MoS2@rGO nanocomposite was integrated on a stretchable 3D porous LIG pattern yielding an extraordinarily high SNR of 1026.9 to NO2 of 2 ppm. Considering the high SNR of over 60 to NO2 of 10 ppb, the novel LIG gas sensing platform with a simple fabrication process shows a great promise to test nanomaterials and enable stretchable bio-integrated gas sensors for monitoring of the health and environment. (c) 2020 Elsevier Ltd. All rights reserved.

关键词： Molybdenum disulfide (MoS2) Reduced graphene oxide (rGO) Nitrogen dioxide (NO2) Stretchable and ultrasensitive Laser-induced graphene (LIG) patterns

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