Soft science最新文献_第7页

Biomedical DNA hydrogels 生物医学DNA水凝胶

Soft science Pub Date : 2022-01-01 DOI: 10.20517/ss.2021.20

Yong Hu

引用次数: 0

Recent progress in flexible piezoelectric devices toward human-machine interactions 柔性压电器件人机交互研究进展

Soft science Pub Date : 2022-01-01 DOI: 10.20517/ss.2022.23

引用次数: 10

PEDOT:PSS-based intrinsically soft and stretchable bioelectronics PEDOT:基于pss的本质柔软和可拉伸的生物电子学

Soft science Pub Date : 2022-01-01 DOI: 10.20517/ss.2022.07

Gang Li

引用次数: 4

Polyelectrolyte-based conductive hydrogels: from theory to applications 聚电解质基导电水凝胶:从理论到应用

Soft science Pub Date : 2022-01-01 DOI: 10.20517/ss.2022.09

Xiangchao Fan, Zhao-jun Chen, Haotian Sun, S. Zeng, Ruonan Liu, Ye Tian

引用次数: 2

Enhanced electromechanical conversion via in situ grown CsPbBr3 nanoparticles/poly(vinylidene fluoride) fibers for physiological signal monitoring 通过原位生长的CsPbBr3纳米颗粒/聚偏氟乙烯纤维增强机电转换，用于生理信号监测

Soft science Pub Date : 2022-01-01 DOI: 10.20517/ss.2021.21

Xindi Sun, Fengyuan Zhang, Lingyu Zhang, Guimin Liu, Yalong Wang, Yao Wang, Yuan Deng

{"title":"Enhanced electromechanical conversion via in situ grown CsPbBr3 nanoparticles/poly(vinylidene fluoride) fibers for physiological signal monitoring","authors":"Xindi Sun, Fengyuan Zhang, Lingyu Zhang, Guimin Liu, Yalong Wang, Yao Wang, Yuan Deng","doi":"10.20517/ss.2021.21","DOIUrl":"https://doi.org/10.20517/ss.2021.21","url":null,"abstract":"Mechanical energy conversion based on piezoelectric principle has received much attention due to its promising applications in sustainable power supply systems and sensor technology. Ferroelectric poly(vinylidene fluoride) (PVDF) combines the advantages of both good electromechanical coupling and easy processability, yet the low piezoelectric coefficient limits its output performances thus cannot meet the increasing requirements for power generation and sensing. Here, inorganic metal halide perovskite CsPbBr3 (CPB) nanoparticles have been incorporated into the PVDF fibers via electrospinning technique, where an in situ crystallization and growth process of CPB nanoparticles have been established. Meanwhile, both the CPB nanoparticles and PVDF fibers are poled by the electric field during electrospinning process, which promotes the formation of polar phase of PVDF and the distortion of CPB lattice, resulting in greatly enhanced piezoelectric performances of CPB/PVDF composites. The output performances under external force of the flexible generator developed from electrospun CPB/PVDF films are significantly enhanced compared with neat PVDF film, with the maximum Voc value 8.4 times higher; while the measurements on the microscopic piezoelectric responses unambiguously reveal that the increased polar phase mainly contributes to the enhanced electromechanical coupling. The functions of CPB/PVDF film as physiological signals monitoring sensor have been performed, demonstrating its potential applications as flexible piezoelectric generator and wearable health monitoring electronics.","PeriodicalId":74837,"journal":{"name":"Soft science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67660006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Direct fabrication of high-performance multi-response e-skin based on a graphene nanosheet film 基于石墨烯纳米片薄膜的高性能多响应电子皮肤的直接制备

Soft science Pub Date : 2022-01-01 DOI: 10.20517/ss.2022.18

Xi Zhang, Xiaolin Li, Xusheng Wang, Lin Yuan, Jing Ye, Xin Wang, Hualin Deng, Bo Wen, Dong-feng Diao

{"title":"Direct fabrication of high-performance multi-response e-skin based on a graphene nanosheet film","authors":"Xi Zhang, Xiaolin Li, Xusheng Wang, Lin Yuan, Jing Ye, Xin Wang, Hualin Deng, Bo Wen, Dong-feng Diao","doi":"10.20517/ss.2022.18","DOIUrl":"https://doi.org/10.20517/ss.2022.18","url":null,"abstract":"With the increasing popularity of wearable devices, lightweight electronic skin (e-skin) has attracted significant attention. However, current fabrication technologies make it difficult to directly fabricate sensing materials on flexible substrates at low temperatures. Hence, we propose a flexible graphene nanosheet-embedded carbon (F-GNEC) film, which is directly grown on a flexible substrate using an electron cyclotron resonance low-temperature sputtering system. The direct batch manufacturing of e-skin is obtained by the unique plasma generation mode of electron cyclotron resonance and the polariton energy transfer mode between the plasma and substrate surface. The F-GNEC film contains a large number of graphene nanosheets grown vertically and the graphene edges can serve as electron capture centers, thereby enabling the multi-response properties. We achieve a high gauge factor of 14,699 under a tensile strain of ε = 0.5% and the changing rate of the resistance reaches to 113.2% when the e-skin is bent to 120°. Furthermore, the e-skin achieves a photocurrent of 1.2 μA under 532 nm laser illumination. The F-GNEC film exhibits a sensitive temperature response and achieves a coefficient of -0.58%/°C in a wide temperature range (30-100 °C). The directly fabricated F-GNEC film-based e-skin is stable and firm and exhibits multi-response detection capabilities, which enable its potential application in virtual reality technology and flexible robots.","PeriodicalId":74837,"journal":{"name":"Soft science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67660115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Citric acid-based degradable polyester elastomers coated with silver nanowires for sustainable soft sensors 柠檬酸基可降解聚酯弹性体包覆银纳米线，用于可持续软传感器

Soft science Pub Date : 2022-01-01 DOI: 10.20517/ss.2022.14

Zhao Wang, H. Zhou, Bohui Zheng, Yang Gao, Hongli Zhang, Xilang Jin, Gai Zhang, Aijie Ma

{"title":"Citric acid-based degradable polyester elastomers coated with silver nanowires for sustainable soft sensors","authors":"Zhao Wang, H. Zhou, Bohui Zheng, Yang Gao, Hongli Zhang, Xilang Jin, Gai Zhang, Aijie Ma","doi":"10.20517/ss.2022.14","DOIUrl":"https://doi.org/10.20517/ss.2022.14","url":null,"abstract":"Although soft electronic materials are of significant importance for flexible electronic devices, most of them are derived from commercial polymer elastomers, such as polydimethylsiloxane, polyurethane and Ecoflex. In this work, citric acid-based degradable polyester elastomers are prepared by a melt polycondensation process, utilizing citric acid, 1,8-octanediol and poly(ethylene glycol) (PEG) as monomers. Furthermore, poly(1,8-octanediol citrate acid) (POC)-PEG/silver nanowire (AgNW) conductive polyester elastomers (CPEs) are prepared by introducing a AgNW layer on the surface of the POC-PEG films. Scanning electron microscopy images reveal that the thickness of the AgNW layer is on the scale of several micrometers and the AgNWs form a continuous conductive network. Upon mechanical stimuli, POC-PEG exhibits recoverable deformation and induces variation in the AgNW conductive network, resulting in a conversion of strain to detectable resistance. When tensile strain is applied, the POC-PEG/AgNW CPEs achieve a gauge factor of 231.6, a response range of 0%-50%, a low response time of 35 ms and high stability. Moreover, the POC-10PEG/AgNW CPE also responds to bending deformation with a gauge factor of 3667.5, a response range of 0%-8.4%, a low response time of 62 ms and high stability. On the basis of strain sensitivity, wireless sensors are further assembled by integrating the POC-PEG/AgNW CPEs into a Bluetooth signal transmission system. Various human motions and physiological activities are successfully monitored using the wireless sensors. The results demonstrate that degradable citric acid-based polyester elastomers/AgNW CPEs are promising materials for next-generation sustainable and flexible electronic devices.","PeriodicalId":74837,"journal":{"name":"Soft science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67660506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Applications of flexible polyimide: barrier material, sensor material, and functional material 柔性聚酰亚胺的应用:阻隔材料、传感器材料、功能材料

Soft science Pub Date : 2022-01-01 DOI: 10.20517/ss.2022.24

引用次数: 1

Fabrication method and performance of a light-responsive hydrogel microvalve in a microfluidic chip 微流控芯片中光响应水凝胶微阀的制造方法及性能

Soft science Pub Date : 2022-01-01 DOI: 10.20517/ss.2022.03

Jingwen Pan, Kehan Chen, Wenqiang Zhang, Lin Feng, Deyuan Zhang

{"title":"Fabrication method and performance of a light-responsive hydrogel microvalve in a microfluidic chip","authors":"Jingwen Pan, Kehan Chen, Wenqiang Zhang, Lin Feng, Deyuan Zhang","doi":"10.20517/ss.2022.03","DOIUrl":"https://doi.org/10.20517/ss.2022.03","url":null,"abstract":"Microfluidic technology has potential advantages in the complex manipulation of microfluidics on small-sized chips. However, it is difficult to integrate microvalves with complex flow channel structures, and this has limited the miniaturization of microfluidic systems and their portable applications. Light-responsive hydrogel (LRH) materials can rapidly change their volume under laser irradiation and can be used to prepare flexible microvalves to realize the integrated control of microfluidics. A simple fabrication method for an LRH microvalve on a microfluidic chip is proposed. The microspheres, as control elements of the microvalve based on an LRH modified with Laponite RD nanoclay and ferriferous oxide (Fe3O4) nanoparticles, are prepared through a T-shaped flow channel. The microvalve is assembled on the microfluidic chip with a normally closed circulation channel. The open/close performance of the microvalve is represented by the color change of the photonic crystal material. The results show that the LRH microspheres shrink and the flow channel opens after laser irradiation for 2 s. After stopping the laser at 18 s, the valve core swells and the flow channel closes.","PeriodicalId":74837,"journal":{"name":"Soft science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67660047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Restoring finger-specific tactile sensations with a sensory soft neuroprosthetic hand through electrotactile stimulation 通过触电刺激恢复手指特定触觉的感觉软神经假肢手

Soft science Pub Date : 2022-01-01 DOI: 10.20517/ss.2022.17

Haipeng Xu, G. Chai, Ningbin Zhang, G. Gu

{"title":"Restoring finger-specific tactile sensations with a sensory soft neuroprosthetic hand through electrotactile stimulation","authors":"Haipeng Xu, G. Chai, Ningbin Zhang, G. Gu","doi":"10.20517/ss.2022.17","DOIUrl":"https://doi.org/10.20517/ss.2022.17","url":null,"abstract":"Tactile feedback is of great significance for amputees to improve the controllability of prosthetic hands and obtain tactile information regarding the interacting objects, which remains a significant challenge for neuroprosthetic hands. In this study, we present a method to restore finger-specific tactile sensations on the projected finger map of a unilateral forearm amputee with a sensory soft neuroprosthetic hand through electrotactile stimulation. On this basis, five soft touch sensors embedded in the fingertips are first adopted to measure the pressure changes of the soft neuroprosthetic hand with the touched objects. The measured pressure information is then accordingly encoded into electrotactile stimulation patterns to trigger an electrical stimulator that outputs programmable electrical pulses on the projected finger map of the amputee. In this manner, the finger tactile sensation can be elicited, which can help the amputee to distinguish the finger press state and discriminate the curvature and hardness of the touched objects. Experimental results show that, based on the different stimulation regions, the amputee subject can instantaneously distinguish the tactile sensation of a single finger or multiple fingers with an accuracy of 98.57% and 91.71%, respectively. By programming the frequencies of the electrical pulses, the amputee subject can successfully discriminate the touching objects with different curvatures and hardnesses with an accuracy of 97.26% and 97.93%, respectively. Finally, we demonstrate that the amputee subject can achieve closed-loop control of the sensory soft neuroprosthetic hand by integrating a myoelectric control interface and electrotactile feedback to achieve multilevel perception.","PeriodicalId":74837,"journal":{"name":"Soft science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67660073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4