Article
Materials Science, Multidisciplinary
Marc Martinez-Estrada, Heura Ventura, Ignacio Gil, Raul Fernandez-Garcia
Summary: In this paper, a fully integrated textile capacitive woven sensor for moisture measurement and presence detection is presented. The sensor demonstrates excellent response to moisture and presence, with improved repeatability compared to previous embroidered sensors. The adaptation of the weaving process opens the door to commercial production of this sensor.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Shaobo Si, Chenchen Sun, Jing Qiu, Jing Liu, Jin Yang
Summary: This study developed an all-yarn-based all-textile sensor using commercial knitting technology, which exhibits good textile characteristics and electrical performance. It can accurately capture deformation signals caused by human motion and respiration, while maintaining comfort, aesthetics, and washability.
APPLIED MATERIALS TODAY
(2022)
Article
Nanoscience & Nanotechnology
Z. He, G. Zhou, Y. Oh, B. -M. Jung, M. -K. Um, S. -K. Lee, J. Il Song, J. -H. Byun, T. -W. Chou
Summary: In this study, we developed a compact and highly sensitive textile-based humidity sensor using SWNT/PVA/LiCl nanocomposite filaments. The sensor exhibited excellent stability and high sensitivity, and it could rapidly respond to humidity changes and human breathing. These performances make the sensor highly suitable for real-time microclimate monitoring on textiles.
MATERIALS TODAY NANO
(2022)
Article
Multidisciplinary Sciences
Hongwoo Jang, Kaan Sel, Eunbin Kim, Sangjun Kim, Xiangxing Yang, Seungmin Kang, Kyoung-Ho Ha, Rebecca Wang, Yifan Rao, Roozbeh Jafari, Nanshu Lu
Summary: This article presents a novel heterogeneous serpentine ribbons design that enables a stretchable and robust interface between graphene e-tattoos and printed circuit boards, allowing for ambulatory electrodermal activity monitoring on the palm. The addition of a soft interlayer improves the strain concentration issue, and a new event selection policy validates the accuracy of the EDA sensor.
NATURE COMMUNICATIONS
(2022)
Review
Chemistry, Multidisciplinary
Min Su, Pei Li, Xueqin Liu, Dapeng Wei, Jun Yang
Summary: This paper provides a comprehensive review of recent developments in textile-based flexible capacitive pressure sensors, including sandwich structures, yarn structures, and in-plane structures. It discusses the influences of different device structures on performance and summarizes the applications of textile-based sensors in human wearable devices, robotic sensing, and human-machine interaction. The paper also highlights evolutionary trends, future directions, and challenges.
Article
Chemistry, Inorganic & Nuclear
Yan-Yan Yin, Le-Xi Zhang, Heng Xu, Yue-Cheng Jian, Meng-Jun Zhang, Li-Jian Bie
Summary: In this study, a new CP material CdTMA was successfully synthesized and explored as an impedimetric humidity sensing material, showing high sensitivity, good repeatability, fast response, and narrow hysteresis loop. The humidity sensing mechanism was discussed through complex impedance analysis, and the interaction between water molecules and CdTMA at different RH was further visualized by schematic diagrams.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Engineering, Environmental
Lulu Xu, Heng Zhai, Xiao Chen, Yulong Liu, Miao Wang, Zhangchi Liu, Muhammad Umar, Chengyu Ji, Zhongda Chen, Lu Jin, Zekun Liu, Qingwen Song, Pengfei Yue, Yi Li, Terry T. Ye
Summary: This study investigates textile-based humidity sensors constructed from different natural and synthetic fibers, and finds that the graphene-oxide functionalized Coolmax humidity sensor exhibits ultrafast response/recovery time and insensitivity to external pressure and temperature changes.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Xiu-Juan Xie, Ren-Jun Si, Jun Zheng, Kai Wei, Xiu-Ying Zheng, Cheng Chen, Chun-Chang Wang
Summary: ZnO/NiO hollow spheres were successfully prepared with good purity and crystallinity, showing enhanced humidity response compared to pure materials. The sensor achieved a large impedance variation and fast response/recovery time, demonstrating promising potential for advanced humidity sensor applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Analytical
Minju Jang, Ho-Dong Kim, Hyung-Jun Koo, Ju-Hee So
Summary: This research introduces a wearable skin hydration sensor based on cotton textile, which utilizes impedance analysis to determine the hydration level of the skin. The sensor demonstrates reliable monitoring of skin impedance changes in relation to hydration level, and maintains flexibility during movement.
Article
Chemistry, Analytical
Zhenyu Wei, Jianqiu Huang, Wenhao Chen, Qingan Huang
Summary: This study investigated flexible capacitive humidity sensors fabricated on porous PTFE substrates, utilizing a graphene oxide sensing material. An ethanol soak process was developed to enhance sensor yield, resulting in sensors with high sensitivity, low hysteresis, and fast response/recovery time.
Article
Chemistry, Multidisciplinary
Huangping Yan, Zilu Chen, Linyuan Zeng, Zijun Wang, Gaofeng Zheng, Rui Zhou
Summary: A flexible and high-performance humidity sensor based on SnO2/rGO nanocomposites was developed, with different doping ratios of rGO affecting the sensitivity and response time of the sensor. The sensor with 2 wt% rGO-doping demonstrated high sensitivity, fast response time, and good flexibility and stability even under bending conditions. Furthermore, the sensor could accurately reflect different breathing states and track breathing intervals as short as 3 seconds, showing potential for real-time monitoring of human health.
Review
Chemistry, Multidisciplinary
Giwon Lee, Mohammad Zarei, Qingshan Wei, Yong Zhu, Seung Goo Lee
Summary: Recent advances in nanolithography, miniaturization, and material science, along with developments in wearable electronics, have pushed sensor technology to fabricate highly sensitive, flexible, stretchable, and multimodal detection systems. Surface wrinkling, as an effective alternative, improves the sensing performance and mechanical deformability of flexible and stretchable sensors by releasing stress, preventing failure, and enlarging surface areas. This study discusses the recent developments in wrinkling structures for sensor applications, including the mechanics, geometry control, and fabricating methods. It reviews the current state and impact on various sensor types, such as strain, pressure, temperature, chemical, photodetectors, and multimodal sensors. The study also extrapolates the existing wrinkling approaches, designs, and sensing strategies into future applications.
Article
Chemistry, Analytical
Li Li, Xiaoqi Xuan, Gaifang Chen, Cheng Chen, Chunchang Wang
Summary: Na0.5Bi0.5TiO3 nanospheres synthesized by hydrothermal method exhibit ultrahigh sensing response, making them promising candidates for construction of high response humidity sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Wei Zhao, Tingting Sun, Yiwei Zheng, Qihao Zhang, Aibin Huang, Lianjun Wang, Wan Jiang
Summary: The development of ionic thermoelectric materials is of great interest for efficient heat-to-electricity conversion. A novel ionogel consisting of polyethylene oxide, polyethylene oxide-polypropylene oxide-polyethylene oxide, and 1-ethyl-3-methylimidazolium acetate was reported. The ionogel exhibited excellent properties including high Seebeck coefficient, good ionic conductivity, superior stretchability, and high stability.
Article
Materials Science, Multidisciplinary
Xiaoling Tong, Zhengnan Tian, Jingyu Sun, Vincent Tung, Richard B. Kaner, Yuanlong Shao
Summary: This article introduces the design and features of flexible/stretchable energy storage devices, analyzes three self-healing mechanisms, and reviews the key components of supercapacitors and batteries, as well as methodological evaluations.
Article
Chemistry, Physical
Antoine Maignan, Marcus Schmidt, Yurii Prots, Oleg Lebedev, Ramzy Daou, Chun-Fu Chang, Chang-Yang Kuo, Zhiwei Hu, Chien-Te Chen, Shih-Chang Weng, Simone G. Altendorf, Liu-Hao Tjeng, Yuri Grin
Summary: Synthetic crystals of ferberite FeWO4 have been grown and their properties were investigated, including magnetic, electrical and structural characteristics.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Chun-Chien Chiu, Sheng-Zhu Ho, Jenn-Min Lee, Yu-Cheng Shao, Yang Shen, Yu-Chen Liu, Yao-Wen Chang, Yun-Zhe Zheng, Rong Huang, Chun-Fu Chang, Chang-Yang Kuo, Chun-Gang Duan, Shih-Wen Huang, Jan-Chi Yang, Yi-De Chuang
Summary: Strontium titanate (STO) has recently attracted significant attention in the field of strongly correlated materials due to its emergent properties such as ferroelectricity and superconductivity. In this study, it was found that ultrathin freestanding STO films with a thickness of around 10 nm exhibit a tetragonal structure at room temperature, contrary to the cubic structure observed in bulk form. Spectroscopic measurements revealed modified Ti-O orbital hybridization and an off-center displacement of the Ti ion in TiO6 octahedron, indicating a unique electronic structure in these ultrathin films.
Article
Physics, Multidisciplinary
D. Takegami, C-Y Kuo, K. Kasebayashi, J-G Kim, C. F. Chang, C. E. Liu, C. N. Wu, D. Kasinathan, S. G. Altendorf, K. Hoefer, F. Meneghin, A. Marino, Y. F. Liao, K. D. Tsuei, C. T. Chen, K-T Ko, A. Guenther, S. G. Ebbinghaus, J. W. Seo, D. H. Lee, G. Ryu, A. C. Komarek, S. Sugano, Y. Shimakawa, A. Tanaka, T. Mizokawa, J. Kunes, L. H. Tjeng, A. Hariki
Summary: We present a comprehensive study of CaCu3Ru4O12 using bulk sensitive hard and soft x-ray spectroscopy combined with local-density approximation + dynamical mean-field theory (DMFT) calculations. Correlation effects on both the Cu and Ru ions can be observed. Based on the analysis of Cu 2p corelevel spectra, we infer the presence of magnetic Cu2+ ions hybridized with itinerant electrons. The photon energy dependence of the valence band allows us to optimize the DMFT calculations, indicating that CaCu3Ru4O12 can be classified as a Kondo system with a Kondo temperature in the range of 500-1000 K.
Article
Chemistry, Multidisciplinary
Chang-Yang Kuo, Yi-De Liou, Zhiwei Hu, Sheng-Chieh Liao, Huang-Ming Tsai, Huang-Wen Fu, Chih-Yu Hua, Yi-Chun Chen, Hong-Ji Lin, Arata Tanaka, Chien-Te Chen, Jan-Chi Yang, Chun-Fu Chang
Summary: Antiferromagnetic spintronics is a promising field for non-volatile data storage and information processing. Researchers have discovered two reversibly switchable antiferromagnetic spin states in BiFeO3 thin films, and demonstrated the capability of optical writing and electrical reading of these states.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Antoine Maignan, Jacqueline-Nadine Jiongo-Dongmo, Christine Martin, O. I. Lebedev, Francoise Damay, Xiao Wang, Chang-Yang Kuo, Chun-Fu Chang, Zhiwei Hu, Liu Hao Tjeng
Summary: In this study, the Fe4-xNixNb2O9 material was analyzed using various experimental methods. It was found that the structure of the material remains unchanged as nickel substitutes for iron, but there is a decrease in the unit cell volume. Fe3NiNb2O9 has a lower antiferromagnetic transition temperature than Fe4Nb2O9, and below this temperature, its magnetization and electric polarization show a stronger dependence on magnetic field.
SOLID STATE SCIENCES
(2022)
Article
Multidisciplinary Sciences
Ping-Chun Wu, Chia-Chun Wei, Qilan Zhong, Sheng-Zhu Ho, Yi-De Liou, Yu-Chen Liu, Chun-Chien Chiu, Wen-Yen Tzeng, Kuo-En Chang, Yao-Wen Chang, Junding Zheng, Chun-Fu Chang, Chien-Ming Tu, Tse-Ming Chen, Chih-Wei Luo, Rong Huang, Chun-Gang Duan, Yi-Chun Chen, Chang-Yang Kuo, Jan-Chi Yang
Summary: Epitaxial growth is crucial for delivering high-quality thin films in modern technology. Traditional heteroepitaxy limits lattice structure and crystalline orientation selection. This study reveals the growth of twisted oxide lateral homostructures with atomically sharp interfaces, which can have different crystalline orientations, ferroic orders, and phases.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
M. X. Guo, C. K. Cheng, Y. C. Liu, C. N. Wu, W. N. Chen, T. Y. Chen, C. T. Wu, C. H. Hsu, S. Q. Zhou, C. F. Chang, L. H. Tjeng, S. F. Lee, C. F. Pai, M. Hong, J. Kwo
Summary: In this study, single-crystal EuIG thin films were successfully grown on GGG substrates using epitaxial growth method, and exhibited strain-induced perpendicular magnetic anisotropy. By adjusting the sputtering conditions, the composition ratios of Eu/Fe in the films were varied to control the film strains. The films had smooth, particle-free surface with excellent crystallinity and a stable interface connection.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Chemistry, Analytical
Pi-Guey Su, Xing-Chen Chai
Summary: Gas sensors for detecting ppb-level H2S gas at room temperature were fabricated using Ag nanowire/hollow polypyrrole nanotube nanocomposite. The introduction of Ag nanowires onto hollow polypyrrole nanotubes effectively promoted the sensor response to H2S gas.
Article
Materials Science, Multidisciplinary
Yu-Hong Lai, Pao -Wen Shao, Chang-Yang Kuo, Cheng-En Liu, Zhiwei Hu, Chen Luo, Kai Chen, Florin Radu, Yong-Jyun Wang, Junding Zheng, Chungang Duan, Chun-Fu Chang, Li Chang, Yi-Chun Chen, Sang-Wook Cheong, Ying-Hao Chu
Summary: This study investigates the modulation of magnetic and electric orders in magnetoelectric materials through quasi-static mechanical strain. It is found that mechanical bending can significantly enhance the magnetization of Cr2O3 film and adjust its electric polarization and magnetoelectric coupling. This work provides a comprehensive understanding of the relationship between strain and magnetic and electrical behaviors and opens new possibilities for combining magnetoelectric materials with flexible substrates.
Article
Chemistry, Analytical
Pi-Guey Su, Chih-Chang Hsu
Summary: A flexible humidity sensor was developed by integrating sol-gel processing, free radical polymerization, and self-assembly techniques. The sensor incorporated gold nanoparticles and a trifunctional organosilica compound. The sensor demonstrated high sensitivity, minimal hysteresis, and rapid response time across a broad range of working humidity levels.
Article
Chemistry, Physical
Lun Jin, Haozhe Wang, Xianghan Xu, Danrui Ni, Chen Yang, Yu-Chieh Ku, Cheng-En Liu, Chang-Yang Kuo, Chun-Fu Chang, Raimundas Sereika, Wenli Bi, Weiwei Xie, Robert J. Cava
Summary: BaNiO3 synthesized with different methods have different magnetic properties. BaNiO3 synthesized in open air is a hydroxide-containing form, and other hexagonal perovskite oxides prepared in wet conditions may also contain hydroxide ions.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Shanquan Chen, Jhong-Yi Chang, Qinghua Zhang, Qiuyue Li, Ting Lin, Fanqi Meng, Haoliang Huang, Yangyang Si, Shengwei Zeng, Xinmao Yin, My Ngoc Duong, Yalin Lu, Lang Chen, Er-Jia Guo, Hanghui Chen, Chun-Fu Chang, Chang-Yang Kuo, Zuhuang Chen
Summary: The spin state of Co ions in epitaxial LaCoO3 thin films under tensile strain has been determined to have mixed high-spin and low-spin states, while it is practically a low-spin state under compressive strain. The identification of this spin state ratio explains the origin of ferromagnetism in LaCoO3 films. This study highlights the importance of spin state degrees of freedom and thin-film strain engineering in creating new physical properties that do not exist in bulk materials.
Article
Materials Science, Multidisciplinary
Andrea Marino, Denise S. Christovam, Chun-Fu Chang, Johannes Falke, Chang-Yang Kuo, Chi-Nan Wu, Martin Sundermann, Andrea Amorese, Hlynur Gretarsson, Eric Lee-Wong, Camilla M. Moir, Yuhang Deng, M. Brian Maple, Peter Thalmeier, Liu Hao Tjeng, Andrea Severing
Summary: The application of pressure and substitution of Ru with Fe in URu2Si2 leads to the formation of large-moment antiferromagnetic phase. The substitution series URu2-xFexSi2 was investigated, and nonmonotonic changes in the spectra were observed. The behavior can be explained by the competition of chemical pressure and increase in density of states. An extended Doniach phase diagram including the density of states dependence is proposed to explain the formation of magnetic order in the URu2-xFexSi2 substitution series.
Article
Materials Science, Multidisciplinary
Andrea Marino, Martin Sundermann, Denise S. Christovam, Andrea Amorese, Chun-Fu Chang, Paulius Dolmantas, Ayman H. Said, Hlynur Gretarsson, Bernhard Keimer, Maurits W. Haverkort, Alexander V. Andreev, Ladislav Havela, Peter Thalmeier, Liu Hao Tjeng, Andrea Severing
Summary: Using high resolution X-ray scattering techniques, we were able to detect electronic excitations in intermetallic UGa2 that are highly atomic in nature. This study is important for resolving the debate about the degree of electron localization versus itinerancy in UGa2.
Article
Materials Science, Multidisciplinary
M. Okawa, D. Takegami, D. S. Christovam, M. Ferreira-Carvalho, C. -Y. Kuo, C. T. Chen, T. Miyoshino, K. Takasu, T. Okuda, C. F. Chang, L. H. Tjeng, T. Mizokawa
Summary: The research investigates the differences in the titanium 3d orbitals between corundum-type Ti2O3 and ilmenite-type MgTiO3 using linear dichroism of soft x-ray absorption spectroscopy. The study confirms the presence of the Ti-Ti bond and the change in symmetry of the 3d orbitals under hole doping.
