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Highly Sensitive Piezoresistive Pressure Sensor Based on Micropyramid Patterned Tough Hydrogel

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SSRN

SSRN 2022年

作者： Zhang, Yun Xia He, Yuan Liang, Yi Tang, Jie Yang, Yang Song, He Ming Zrínyi, Miklós Chen, Yong Mei College of Bioresources Chemical and Materials Engineering National Demonstration Center for Experimental Light Chemistry Engineering Education Shaanxi University of Science and Technology Shaanxi Xi’an710021 China Research Center for Semiconductor Materials and Devices Shaanxi University of Science and Technology Shaanxi Xi’an710021 China State Key Laboratory for Strength and Vibration of Mechanical Structures International Center for Applied Mechanics School of Aerospace Engineering Xi’an Jiaotong University Shaanxi Xi’an710049 China Department of Biophysics and Radiation Biology Faculty of Medicine Semmelweis University H-1094 Tuzolto str. 37-47 Budapest Hungary

Hydrogel-based piezoresistive pressure sensors hold enormous potential in flexible electronics. However, limited bulk resistance variation inside the hydrogels strongly hinders their practical applications for flexible electronics. Herein, we prepared a type of piezoresistive pressure sensor by decorating pyramid microarrays on surface of a tough polyacrylamide (PAAm)/poly(vinyl alcohol) (PVA) hydrogel. To achieve high sensing behaviors, sizes and topologies of the recessed pyramid microarrays molded by three-dimensional (3D) printing photosensitive resin were carefully investigated for elaborate fabrication of pyramid microarray hydrogel. The PAAm/PVA hydrogel of excellent comprehensive mechanical performances decorated with pyramid microarrays was able to generate large contact resistance variation to response external pressure, achieving a high sensitivity up to 2.27 kPa -1 . Such tough and sensitive hydrogel-based flexible sensors have significant potential applications in the fields of underwater acoustic detection, E-skins, and wearable devices. © 2022, The Authors. All rights reserved.

关键词： Hydrogels

Corrigendum to "Synergetic effect of bismuth vanadate over copolymerized carbon nitride composites for highly efficient photocatalytic H2 and O2 generation" [J. Colloid Interface Sci. 627 (2022) 621-629]

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Journal of colloid and interface science 2022年第PT A期628卷 366-367页

作者： Asif Hayat Muhammad Sohail T A Taha Sunil Kumar Baburao Mane Abdullah G Al-Sehemi Ahmed A Al-Ghamdi W I Nawawi Arkom Palamanit Mohammed A Amin Ahmed M Fallatah Zeeshan Ajmal Hamid Ali Wasim Ullah Khan Muhammad Wajid Shah Javid Khan S Wageh State Key Laboratory of Photocatalysis on Energy and Environment College of Chemistry Fuzhou University Fuzhou 350116 China. Yangtze Delta Region Institute (Huzhou) University of Electronic Science and Technology of China Huzhou 313001 China. Physics Department College of Science Jouf University P.O. Box: 2014 Sakaka Saudi Arabia Physics and Engineering Mathematics Department Faculty of Electronic Engineering Menoufia University Menouf 32952 Egypt. Department of Chemistry Khaja Bandanawaz University Kalaburagi Karnataka 585104 India. Research Center for Advanced Materials Science (RCAMS) King Khalid University P.O. Box 9004 Abha 61413 Saudi Arabia Department of Chemistry College of Science King Khalid University P.O. Box 9004 Abha 61413 Saudi Arabia. Department of Physics Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia. Faculty of Applied Sciences Universiti Teknologi MARA Cawangan Perlis Arau Perlis 02600 Malaysia. Energy Technology Program Department of Specialized Engineering Faculty of Engineering Prince of Songkla University 15 Karnjanavanich Rd. Hat Yai Songkhla 90110 Thailand. Department of Chemistry College of Science Taif University P.O. Box 11099 Taif 21944 Saudi Arabia. School of Chemistry and Chemical Engineering Northwestern Polytechnical University Xian 710072 China. Multiscale Computational Materials Facility Key Laboratory of Eco-Materials Advanced Technology College of Materials Science and Engineering Fuzhou University Fuzhou 350100 China. State Key Laboratory of Optoelectronic Materials and Technologies School of Materials Science and Engineering Sun Yat-sen University Guangzhou 510275 China. Electronic address: wasimullah89@***. School Of Chemistry Sun Yat-sen University Guangzhou 510275 China. Electronic address: m.wajidshah@***. College of Materials Science and Engineering Hunan University Changsha Hunan 410082 China. Electronic address: javidchemist@yahoo.com.

Hierarchical auxetic and isotropic porous medium with extremely negative Poisson's ratio

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arXiv 2022年

作者： Morvaridi, Maryam Carta, Giorgio Bosia, Federico Gliozzi, Antonio S. Pugno, Nicola M. Misseroni, Diego Brun, Michele Department of Applied Science and Technology Politecnico di Torino Corso Duca degli Abruzzi 24 Torino10129 Italy Dipartimento di Ingegneria Meccanica Chimica e dei Materiali Università di Cagliari Piazza d’Armi Cagliari09123 Italy Laboratory of Bio-inspired Bionic Nano Meta Materials & Mechanics Department of Civil Environmental and Mechanical Engineering University of Trento Via Mesiano 77 Trento38123 Italy School of Engineering and Materials Science Queen Mary University of London Mile End Road LondonE1 4NS United Kingdom

We propose a novel two-dimensional hierarchical auxetic structure, consisting of a porous medium in which a homogeneous matrix includes a rank-two set of cuts characterised by different scales. The six-fold symmetry of the perforations makes the medium isotropic in the plane. Remarkably, the mesoscale interaction between the first- and second-level cuts enables the attainment of a very small value of the Poisson’s ratio, close to the minimum reachable limit of -1. The effective properties of the hierarchical auxetic structure are determined numerically, considering both a unit cell with periodic boundary conditions and a finite structure containing a large number of repeating cells. Further, results of the numerical study are validated experimentally on a polymeric specimen with appropriately arranged rank-two cuts, tested under uniaxial tension. We envisage that the proposed hierarchical design can be useful in numerous engineering applications exploiting an extreme auxetic effect. © 2022, CC BY-NC-ND.

关键词： Porous materials

Ferroelectric transistors based on shear-transformation-mediated rhombohedral-stacked molybdenum disulfide

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Nature Electronics 2024年第1期7卷 29-38页

作者： Yang, Tilo H. Liang, Bor-Wei Hu, Hsiang-Chi Chen, Fu-Xiang Ho, Sheng-Zhu Chang, Wen-Hao Yang, Liu Lo, Han-Chieh Kuo, Tzu-Hao Chen, Jyun-Hong Lin, Po-Yen Simbulan, Kristan Bryan Luo, Zhao-Feng Chang, Alice Chinghsuan Kuo, Yi-Hao Ku, Yu-Seng Chen, Yi-Cheng Huang, You-Jia Chang, Yu-Chen Chiang, Yu-Fan Lu, Ting-Hua Lee, Min-Hung Li, Kai-Shin Wu, Menghao Chen, Yi-Chun Lin, Chun-Liang Lan, Yann-Wen Department of Physics National Taiwan Normal University Taipei Taiwan Taiwan Semiconductor Research Institute National Applied Research Laboratories Hsinchu Taiwan Department of Electrophysics National Yang Ming Chiao Tung University Hsinchu Taiwan Department of Physics National Cheng Kung University Tainan Taiwan School of Physics Huazhong University of Science and Technology Wuhan China Institute of Cellular and Organismic Biology Academia Sinica Taipei Taiwan Department of Mathematics and Physics University of Santo Tomas Manila Philippines Program for Semiconductor Devices Materials and Hetero-integration Graduate School of Advanced Technology National Taiwan University Taipei Taiwan Hsinchu Taiwan Department of Physics National Taiwan University Taipei Taiwan Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA United States

To develop low-power, non-volatile computing-in-memory device using ferroelectric transistor technologies, ferroelectric channel materials with scaled thicknesses are required. Two-dimensional semiconductors, such as molybdenum disulfide (MoS2), equipped with sliding ferroelectricity could provide an answer. However, achieving switchable electric polarization in epitaxial MoS2 remains challenging due to the absence of mobile domain boundaries. Here we show that polarity-switchable epitaxial rhombohedral-stacked (3R) MoS2 can be used as a ferroelectric channel in ferroelectric memory transistors. We show that a shear transformation can spontaneously occur in 3R MoS2 epilayers, producing heterostructures with stable ferroelectric domains embedded in a highly dislocated and unstable non-ferroelectric matrix. This diffusionless phase transformation process produces mobile screw dislocations that enable collective polarity control of 3R MoS2 via an electric field. Polarization–electric-field measurements reveal a switching field of 0.036 V nm−1 for shear-transformed 3R MoS2. Our sliding ferroelectric transistors are non-volatile memory units with thicknesses of only two atomic layers and exhibit an average memory window of 7 V with an applied voltage of 10 V, retention times greater than 104 seconds and endurance greater than 104 cycles. © 2023, The Author(s), under exclusive licence to Springer Nature Limited.

关键词： Molybdenum disulfide

Resolving the topology of encircling multiple exceptional points

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arXiv 2023年

作者： Guria, Chitres Zhong, Qi Ozdemir, Sahin Kaya Patil, Yogesh S.S. El-Ganainy, Ramy Harris, Jack Gwynne Emmet Department of Physics Yale University New HavenCT06520 United States Department of Physics Michigan Technological University HoughtonMI49931 United States Department of Engineering Science and Mechanics Materials Research Institute The Pennsylvania State University University ParkPA16802 United States Henes Center for Quantum Phenomena Michigan Technological University HoughtonMI49931 United States Department of Applied Physics Yale University New HavenCT06520 United States Yale Quantum Institute Yale University New HavenCT06520 United States

Non-Hermiticity has emerged as a new paradigm for controlling coupled-mode systems in ways that cannot be achieved with conventional techniques. One aspect of this control that has received considerable attention recently is the encircling of exceptional points (EPs). To date, most work has focused on systems consisting of two modes that are tuned by two control parameters and have isolated EPs. While these systems exhibit exotic features related to EP encircling, it has been shown that richer behavior occurs in systems with more than two modes. Such systems can be tuned by more than two control parameters, and contain EPs that form a knot-like structure. Control loops that encircle this structure cause the system’s eigenvalues to trace out non-commutative braids. Here we consider a hybrid scenario: a three-mode system with just two control parameters. We describe the relationship between control loops and their topology in the full and two-dimensional parameter space. We demonstrate this relationship experimentally using a three-mode mechanical system in which the control parameters are provided by optomechanical interaction with a high-finesse optical cavity. © 2023, CC BY.

关键词： Topology

Reducing system dimensionality with long-range collective dipole-dipole interactions

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arXiv 2023年

作者： Boddeti, Ashwin K. Wang, Yi Juarez, Xitlali G. Boltasseva, Alexandra Odom, Teri W. Shalaev, Vladimir Alaeian, Hadiseh Jacob, Zubin Elmore Family School of Electrical and Computer Engineering Purdue University West LafayetteIN47907 United States Birck Nanotechnology Center Purdue University West LafayetteIN47907 United States Graduate Program in Applied Physics Northwestern University EvanstonIL60208 United States Department of Materials Science and Engineering Northwestern University EvanstonIL60208 United States Department of Chemistry Northwestern University EvanstonIL60208 United States School of Physics and Astronomy Purdue University West LafayetteIN47907 United States

Dimensionality plays a crucial role in long-range dipole-dipole interactions (DDIs). We demonstrate that a resonant nanophotonic structure modifies the apparent dimensionality in an interacting ensemble of emitters, as revealed by population decay dynamics. Our measurements on a dense ensemble of interacting quantum emitters in a resonant nanophotonic structure with long-range DDIs reveal an effective dimensionality reduction to d¯ = 2.20(12), despite the emitters being distributed in 3D. This contrasts the homogeneous environment, where the apparent dimension is d¯ = 3.00. Our work presents a promising avenue to manipulate dimensionality in an ensemble of interacting emitters. © 2023, CC0.

关键词： Dipole moment

Nanostructure-gated organic electrochemical transistors for accurate glucose monitoring in dynamic biological pH conditions

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Biosensors and Bioelectronics 2025年 287卷

作者： Ke Meng Jia Zhu Tianyao Zhang Xianzhe Zhang Yingying Zhang Xiangjie Chen Fan Li Yao Tong Senhao Zhang Donghai Qiu Hongbo Yang Shangbin Liu Lan Yin Rui Zhao Libin Huang Tao Li Min Gao Taisong Pan Jian Yang Huanyu Cheng Yuan Lin School of Materials and Energy University of Electronic Science and Technology of China Chengdu 610054 China Yangtze Delta Region Institute (Quzhou) University of Electronics Science and Technology of China Quzhou 324000 China Department of Engineering Science and Mechanics The Pennsylvania State University University Park PA 16802 USA Suzhou Institute of Biomedical Engineering and Technology Chinese Academy of Science Suzhou 215011 China School of Materials Science and Engineering Tsinghua University Beijing 100084 China Department of Gastroenterology West China Hospital Sichuan University Chengdu 610041 China Research Center for Industries of the Future Biomedical Engineering Program School of Engineering Westlake University Hangzhou Zhejiang 310030 China Medico-Engineering Cooperation on Applied Medicine Research Center University of Electronics Science and Technology of China Chengdu 610054 China

Non-invasive, real-time, and continuous monitoring of trace amounts of glucose in near-neutral biofluids is significant for the daily care and treatment of diabetic patients or people with suboptimal health status. Despite improved sensing performance with novel low-dimensional materials or porous structures in various enzymatic and non-enzymatic electrochemical glucose sensors, they still suffer from high cost, poor long-term stability, and performance fluctuations in varied temperature and pH. This work synergistically combines an Au-modified porous laser-induced graphene (LIG) gate electrode with an organic electrochemical transistor (OECT) to create a flexible non-enzymatic glucose sensor. The resulting OECT-based non-enzymatic glucose sensor exhibits significantly enhanced sensitivity in near-neutral biofluids, the limit of detection (LOD) (0.08 μM in pH = 7.4), excellent stability over time (degradation of ∼10 % in 180 days) and against temperature changes (30 °C–40 °C), self-pH calibration capabilities, and uncompromised sensing performance with shrinking sizes. The highly consistent laser patterning technique and in situ galvanic reduction process for electrode modifications not only provide a simple yet versatile approach to creating low-cost, compact sensing platforms for precise and real-time sweat glucose measurements but also support scalable production, allowing the correlation study of key biomarkers in sweat and blood.

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Incommensurate magnetic orders and topological Hall effect in the square-net centrosymmetric EuGa2Al2 system

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Physical Review materials 2022年第7期6卷 074201-074201页

作者： Jaime M. Moya Shiming Lei Eleanor M. Clements Caitlin S. Kengle Stella Sun Kevin Allen Qizhi Li Y. Y. Peng Ali A. Husain Matteo Mitrano Matthew J. Krogstad Raymond Osborn Anand B. Puthirath Songxue Chi L. Debeer-Schmitt J. Gaudet P. Abbamonte Jeffrey W. Lynn E. Morosan Applied Physics Graduate Program Smalley-Curl Institute Rice University Houston Texas 77005 USA Department of Physics and Astronomy Rice University Houston Texas 77005 USA NIST Center for Neutron Research National Institute of Standards and Technology Gaithersburg Maryland 20899 USA Department of Physics University of Illinois at Urbana-Champaign Urbana Illinois 61801 USA International Center for Quantum Materials School of Physics Peking University CN-100871 Beijing China Department of Physics and Astronomy and Quantum Matter Institute University of British Columbia Vancouver British Columbia Canada V6T 1Z1 Department of Physics Harvard University Cambridge Massachusetts 02138 USA Materials Science Division Argonne National Laboratory Lemont Illinois 60439 USA Department of Materials Science and NanoEngineering Rice University Houston Texas 77005 USA Neutron Scattering Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Department of Materials Science and Engineering University of Maryland College Park Maryland 20742-2215 USA

Neutron diffraction on the centrosymmetric square-net magnet EuGa2Al2 reveals multiple incommensurate magnetic states (AFM1, 2, 3) in zero field. In applied field, a new magnetic phase (A) is identified from magnetization and transport measurements, bounded by two of the μ0H=0 incommensurate magnetic phases (AFM1, helical, and AFM3, cycloidal) with different moment orientations. Moreover, magnetotransport measurements indicate the presence of a topological Hall effect, with maximum values centered in the A phase. Together, these results render EuGa2Al2 a material with noncoplanar or topological spin texture in applied field. X-ray diffraction reveals an out-of-plane (OOP) charge density wave (CDW) below TCDW∼50 K while the magnetic propagation vector lies in plane below TN=19.5 K. Together these data point to a new route to realizing in-plane noncollinear spin textures through an OOP CDW. In turn, these noncollinear spin textures may be unstable against the formation of topological spin textures in an applied field.

关键词： Charge density waves Exotic phases of matter Hall effect Magnetic phase transitions Magnetotransport Symmetry protected topological states Topological materials

Robust substrate anchorages of silk lines with extensible nano-fibres

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arXiv 2022年

作者： Wolff, Jonas O. Liprandi, Daniele Bosia, Federico Joel, Anna-Christin Pugno, Nicola M. Department of Biological Sciences Macquarie University SydneyNSW2109 Australia Laboratory of Bio-inspired Bionic Nano Meta Materials & Mechanics Department of Civil Environmental and Mechanical Engineering University of Trento Via Mesiano 77 TrentoI-38123 Italy Department of Applied Science and Technology Politecnico di Torino Corso Duca degli Abruzzi 24 Torino10129 Italy Institute of Biology II RWTH Aachen University Worringerweg 3 Aachen52074 Germany School of Engineering and Materials Science Queen Mary University Mile End Rd LondonE1 4NS United Kingdom

Living systems are built of multiscale-composites: materials formed of components with different properties that are assembled in complex micro- and nano-structures. Such biological multiscale-composites often show outstanding physical properties that are unachieved by artificial materials. A major scientific goal is thus to understand the assembly processes and the relationship between structure and function in order to reproduce them in a new generation of biomimetic high-performance materials. Here, we tested how the assembly of spider silk nano-fibres (i.e. glue coated 0.5μm thick fibres produced by so-called piriform glands) into different micro-structures correlates with mechanical performance by empirically and numerically exploring the mechanical behaviour of line anchors in an orb weaver, a hunting spider and two ancient web builders. We demonstrate that the anchors of orb weavers exhibit outstanding mechanical robustness with minimal material use by the indirect attachment of the silk line to the substrate through a soft domain (‘bridge’). This principle can be used to design new artificial high-performance attachment systems. © 2022, CC BY-NC-ND.

关键词： Anchors