Article
Chemistry, Analytical
Ivan Kudashov, Sergey Shchukin, Mugeb Al-harosh, Andrew Shcherbachev
Summary: This paper presents a peripheral vascular puncture control system based on electrical impedance measurements, and proposes a decision rule of puncture identification based on the analysis of amplitude-time parameters of experimental signals. The experimental results show that the proposed method achieves an accuracy of 97%.
Article
Engineering, Biomedical
Renxin Wang, Jianxin Bai, Xiaohang Zhu, Zhaodong Li, Lixia Cheng, Guojun Zhang, Wendong Zhang
Summary: Traditional wet electrodes with conductive gel effectively reduce electrode-skin interface impedance in the short term. However, their flexibility and stability cannot meet the long-term monitoring requirements of wearable devices. A flexible microneedle array electrode (FMAE) based on a PDMS substrate is developed, which penetrates the skin's stratum corneum and obtains reliable bioelectrical signals. The FMAE has smaller, more stable impedance and can provide durable and reliable signals for long-term ECG monitoring.
BIOMEDICAL MICRODEVICES
(2022)
Article
Chemistry, Analytical
Yiping Huang, Yatong Song, Li Gou, Yuanwen Zou
Summary: Wearable flexible silver electrodes based on cowhide were prepared and tested for their waveform transmission and impedance. The results showed that these electrodes were comparable to standard gel electrodes when the skin is moist enough, and had higher signal-to-noise ratios than the standard electrodes in the standing posture.
Article
Multidisciplinary Sciences
Kagithiri Srikantharajah, Renata Medinaceli Quintela, Kerstin Doerenkamp, Bjoern M. Kampa, Simon Musall, Markus Rothermel, Andreas Offenhaeusser
Summary: Chronic implantation of flexible neural probes in the mouse brain proved successful in detecting long-term brain activity. By reducing the effective shank length and improving the insertion system, acute trauma was minimized and detection efficiency was enhanced.
SCIENTIFIC REPORTS
(2021)
Article
Nanoscience & Nanotechnology
Sabine Zips, Boxin Huang, Salammbo Hotte, Lukas Hiendlmeier, Chen Wang, Karthyayani Rajamani, Olivier Buriez, George Al Boustani, Yong Chen, Bernhard Wolfrum, Ayako Yamada
Summary: New tools are needed to study neural function in a controllable environment. Recent developments in induced pluripotent stem cell technologies allow for in vitro modeling of the human brain. We present a method using aerosol-jet and inkjet printing to fabricate microelectrode arrays for electrophysiological recordings on 3D neural network assemblies.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Jinli Zhou, Yazhou Zhang, Hongying Yang, Qingxia Liu, Ming Wang, Fan Xiong, Dongyi Chen, Lixin Du
Summary: In order to monitor dynamic ECG for a long time, fabric electrodes need good comfort and electrical properties. This study explores the comfort and acquisition effect of ECG signals of four different silver-plated fabric electrodes under dynamic and static conditions.
Article
Materials Science, Multidisciplinary
Yazhou Zhang, Jinli Zhou, Hongying Yang, Qingxia Liu, Ming Wang, Fan Xiong, Dongyi Chen, Lixin Du
Summary: This study investigates the impact of a fabric electrode skin interface filling medium on ECG signals under dynamic and static conditions. Cotton fabric electrodes were prepared and integrated into a physiotherapy-grade elastic bandage to assemble the fabric ECG tape. The results show that the coating of the fabric electrode with a dielectric reagent greatly reduces electrode-skin contact impedance and improves the stability of the ECG signal.
Article
Engineering, Electrical & Electronic
Salvatore Andrea Pullano, Venkata Deepa Kota, Karthik Kakaraparty, Antonino S. Fiorillo, Ifana Mahbub
Summary: In this paper, an optically unobtrusive dry electrode based on the iono-electric properties of zeolite is developed and proposed for continuous electrocardiogram (ECG) monitoring. The electrical and bio-electrical characterizations are evaluated for different types of electrodes, and the results show that certain parameters lead to the best performance.
IEEE SENSORS JOURNAL
(2022)
Article
Audiology & Speech-Language Pathology
Gaogan Jia, Zijun Song, Lingjie Wu, Qiushi Sun, Yaru Sheng, Yusu Ni, Huawei Li, Wenyan Li
Summary: A method based on CT images, called modified CoT + height + tail (MCHT), accurately predicts the linear insertion depth of cochlear implants preoperatively. This method has submillimeter errors and is tailored to different types of electrode arrays.
Article
Engineering, Biomedical
Benjamin C. Fortune, Christopher G. Pretty, Chris J. Cameron, Lachlan R. McKenzie, Logan T. Chatfield, Michael P. Hayes
Summary: This study measured the magnitude and phase imbalance of electrode-skin interface for different electrode pairs, finding that the imbalance can be large and varies between subjects. Using a compensation network can reduce impedance imbalance and decrease bioelectrical signal interference.
BIOMEDICAL SIGNAL PROCESSING AND CONTROL
(2021)
Article
Engineering, Electrical & Electronic
Ting-Wei Wang, Shien-Fong Lin
Summary: This study aimed to develop negative impedance capacitive electrodes to improve the quality of noncontact ECG measurements. Experimentally validated, the negative impedance capacitive electrodes effectively reduced the coupling effect between the skin and measurement electrodes, enhancing the signal-to-noise ratio.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Multidisciplinary Sciences
Hyeuknam Kwon, Hyoung Churl Park, Albert Cheto Barrera, Seward B. Rutkove, Benjamin Sanchez
Summary: This paper presents a novel method for measuring the permittivity of two-dimensional anisotropic tissues using a multi-electrode cross-shaped needle. By designing a new needle and analyzing the apparent impedance, the authors propose three methods to estimate the anisotropic muscle permittivity. This research opens up new possibilities for neuromuscular diagnosis and assessing the effects of therapeutic interventions on muscle health.
SCIENTIFIC REPORTS
(2022)
Article
Otorhinolaryngology
R. Beck, A. Aschendorff, S. Arndt, T. Hildenbrand, A. K. Rauch, M. C. Ketterer
Summary: This study evaluated scalar position and dislocation rates in patients implanted with a new slim perimodiolar electrode array, showing that the slim electrode design significantly reduced the rate of dislocations.
EUROPEAN ARCHIVES OF OTO-RHINO-LARYNGOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Xiaoning Liu, Zhihao Ke, Yanxing Cheng, Yanzhi Liu, Zigang Deng
Summary: This study investigates the effects of field dependence on levitation force in a regular-geometry superconductor. Several rare phenomena and an analytical critical-state model are proposed based on experimental results. A specialized apparatus is used for accurate measurement.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Chemistry, Multidisciplinary
Dana Dohr, Nicklas Fiedler, Wolfram Schmidt, Niels Grabow, Robert Mlynski, Sebastian P. Schraven
Summary: This study revealed a non-linear increase in electrode array friction with increasing insertion speed, and a high correlation between insertion force and friction coefficient. The findings provide valuable information for evaluating and preventing cochlear implant insertion trauma, as well as optimizing cochlear electrode arrays.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Multidisciplinary
Da Geng, Songyue Chen, Rui Chen, Yuru You, Chiqian Xiao, Chen Bai, Tao Luo, Wei Zhou
Summary: An ordered multilevel microstructure is proposed in this study for performance regulation of piezoresistive pressure sensors. The fabricated flexible sensors exhibit high sensitivity, low detection limit, short response time, and excellent mechanical stability over a wide range. This design and fabrication strategy can be further optimized and applied to a variety of flexible materials.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Nanoscience & Nanotechnology
Wenjun Xu, Xinying Li, Rui Chen, Weiming Lin, Ding Yuan, Da Geng, Tao Luo, Jinhui Zhang, Linjing Wu, Wei Zhou
Summary: In this paper, a method for ultrafast fabrication of magnetic cilia arrays using micro-cavity inducing effect is proposed. The mechanism of this effect is revealed. The method allows for the production of variable stiffness pressure sensors, improved mixing efficiency, and serves as a carrier for rapid sub-encryption.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Multidisciplinary Sciences
Shengzhu Yi, Liu Wang, Zhipeng Chen, Jian Wang, Xingyi Song, Pengfei Liu, Yuanxi Zhang, Qingqing Luo, Lelun Peng, Zhigang Wu, Chuan Fei Guo, Lelun Jiang
Summary: This study proposes a facile fabrication strategy that transforms 2D magnetic sheets into 3D soft magneto-active machines with customized geometries by incorporating origami folding. Based on automated roll-to-roll processing, this approach allows for the high-throughput fabrication of soft magneto-origami machines with a variety of characteristics, showcasing several potential applications.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Lelun Peng, Yuanxi Zhang, Jian Wang, Qingyuan Wang, Guizhou Zheng, Yuanyuan Li, Zhipeng Chen, Yun Chen, Lelun Jiang, Ching-Ping Wong
Summary: Untethered bioinspired soft millirobots, such as Slug-inspired TENG-Robot developed in this study, have the potential for various biomedical applications due to their good environmental adaptability, remote control, and high locomotion efficiency. These robots are capable of generating forward locomotion on different terrains while also sensing and self-charging through a triboelectric nanogenerator.
Article
Multidisciplinary Sciences
Yilin Yang, Xiaoping Hu, Yuxin Liu, Bin Ouyang, Jiaxi Zhang, Huawei Jin, Zhenhua Yu, Ruiwei Liu, Zhe Li, Lelun Jiang, Xudong Lin, Bingzhe Xu
Summary: A promising alternative for treating brain tumors has been developed by creating an implantable ultrasound-powered tumor treating device (UP-TTD) that disrupts cancer cell division without harming normal neurons. In vitro and in vivo experiments demonstrate significant therapeutic effects, with inhibition of tumor cell growth rate and reduction of cancer area. The UP-TTD is wireless, compact, lightweight, and can be adjusted without increasing its size or adding circuits.
Article
Chemistry, Physical
Xinning Zhu, Wei Zhou, Zhengchao Zhu, Rongkang Liu, Yunsong Lian, Rui Chen, Linjing Wu, Dongsheng Ji
Summary: This study establishes and investigates a traveling-wave flow field for the performance improvement of proton exchange membrane fuel cell (PEMFC). The influence of multiple structural parameters on the flow law, mass transfer characteristics, and output performance of PEMFC is analyzed, and the weight coefficient of each structural parameter is obtained. Simulation results show that the traveling-wave flow field has excellent oxygen transport and drainage functions, and it significantly improves the mass transfer coefficient and net power density of the PEMFC compared to the conventional flow field. The weighting relationship of the traveling-wave structural parameters on the mass transfer performance and net power density is identified as wave height > wave number > wave length > wave spacing.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Shupan Zhou, Yuchen Zhong, Weiming Lin, Huihui You, Xinying Li, Linjing Wu, Wei Zhou
Summary: A novel flexible tubular microreactor was designed using a corrugated shell and a high porosity porous copper fiber rod as catalyst support, aiming to be potentially used in constrained space. The influence of placement position, bending direction, and bending angle on the reaction performance of the microreactor was investigated. The results showed that the placement position and bending direction significantly affected the reaction performance, while the reaction performance decreased with increasing bending angle.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Environmental
Xinying Li, Ding Yuan, Tian Xie, Quancong Zhang, Wenjun Xu, Ting Fu, Xuyang Chu, Tao Luo, Linjing Wu, Wei Zhou
Summary: This study demonstrates the use of Joule-heating catalyst support (JHCS) to enhance the efficiency of methanol steam reforming reactions. The Joule-heating method allows for direct heat provision inside the reactor, resulting in faster thermal response and improved methanol conversion rate compared to external heating methods.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Jian Yang, Xia Gong, Shuijin Chen, Ying Zheng, Lelun Peng, Bin Liu, Zhipeng Chen, Xi Xie, Changqing Yi, Lelun Jiang
Summary: Continuous glucose monitoring (CGM) is highly desirable for diabetes management to track blood glucose fluctuation and reduce the risk of hyperglycemia and hypoglycemia. In this study, a smartphone-controlled and microneedle-based wearable CGM system was developed for long-term glucose monitoring. The system, modified with a sandwich-type enzyme immobilization strategy, demonstrated good performance, costing less than $15 and correlating well with commercial glucometers and FDA-approved CGM systems. The intelligently wearable CGM system accurately monitored glucose fluctuations and provided valuable clinical information, offering an alternative solution for home-care diabetes management.
Article
Nanoscience & Nanotechnology
Ying Zheng, Rui Ye, Xia Gong, Jingbo Yang, Bin Liu, Yunsheng Xu, Gang Nie, Xi Xie, Lelun Jiang
Summary: COVID-19 poses a serious threat to public health, and a wearable iontophoresis-driven microneedle (MN) patch is developed for active and efficient transdermal vaccine delivery. The patch consists of polyacrylamide/chitosan hydrogels with excellent properties, and the delivery efficiency is greatly improved by the synergistic effect of MN puncture and iontophoresis. In vitro and in vivo studies demonstrate controlled delivery of ovalbumin and a stronger immune response compared to traditional intramuscular injection, with minimal biosafety concerns. This low-cost and user-friendly delivery system has great potential for vaccine self-administration at home.
MICROSYSTEMS & NANOENGINEERING
(2023)
Article
Multidisciplinary Sciences
Meng Xiao, Ningxia Xu, Aiton He, Zipei Yu, Bo Chen, Baohui Jin, Lelun Jiang, Changqing Yi
Summary: A stand-alone smartphone-based fluorospectrophotometer (the SBS) with a custom-designed application (the SBS-App) was developed for on-site quantitation of pesticide. The device can collect fluorescence emission spectra in the range of 380-760 nm within 5 seconds. With a ratiometric fluorescence probe prepared by directly mixing blue-emissive carbon nanodots and red-emissive quantum dots, a ratiometric fluorescence sensing scheme was developed based on the Fe2+/Fe3+ transformation. The SBS was validated for on-site quantitation of chlorpyrifos in apple and cabbage, showing comparable accuracy to the GC-MS method and offering a scalable solution for pesticide pollution surveillance.
Article
Nanoscience & Nanotechnology
Chen Zhang, Rui Chen, Wenliya Luo, Jincheng Wang, Dongyang Chen, Pengfeng Chen, Sirui Liu, Yu Xie, Wei Zhou, Tao Luo
Summary: In this study, a batch fabrication strategy is proposed for paper-based waterproof flexible pressure sensors using single-walled carbon nanotube coated tissue paper pieces. The pieces are bonded using roll-to-roll lamination, resulting in sensors with high stability, rapid response time, and a wide measurement range. These sensors can be used for human physiological signal detection, motion tracking, and drowning detection.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Wenzhuo Zhang, Lifeng Qin, Rui Chen, Jincheng Wang, Wei Zheng, Wei Zhou
Summary: This article systematically analyzes the influence of the on-resistance of the multiplexer on the measurement error of resistive sensor arrays and proposes improved strategies. The simulation and experimental results confirm the effectiveness of the proposed strategies.
IEEE SENSORS JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Chen Zhang, Rui Chen, Wenliya Luo, Jincheng Wang, Dongyang Chen, Pengfeng Chen, Sirui Liu, Yu Xie, Wei Zhou, Tao Luo
Summary: We have developed a roll-to-roll lamination strategy for batch fabrication of paper-based waterproof flexible pressure sensors, which exhibit good consistency and reliability. This method allows for the rapid fabrication of waterproof sensors with high stability, fast response time, and wide measurement range, enabling applications in human physiological signal detection, motion tracking, and drowning detection.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Jincheng Wang, Rui Chen, Dongsheng Ji, Wenjun Xu, Wenzhuo Zhang, Chen Zhang, Wei Zhou, Tao Luo
Summary: In this study, a flexible bimodal sensor that utilizes the spatial orthogonality between in-plane thermoelectricity and out-plane piezoresistivity is proposed. This sensor enables fully decoupled temperature-pressure sensing with high sensitivity and negligible mutual interference, providing accurate measurements within a wide pressure range and temperature variation.
