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Secondary Sensitivity Control of Silver‐Nanowire‐Based Resistive‐Type Strain Sensors by Geometric Modulation of the Elastomer Substrate 下载免费PDF全文
Yunjeong Heo Youngkyu Hwang Hoon Sun Jung Sung‐Hoon Choa Heung Cho Ko 《Small (Weinheim an der Bergstrasse, Germany)》2017,13(23)
A secondary method for modulation of the sensitivity in silver nanowire (AgNW) resistive‐type strain sensors without the need to change the material or coating process in the sensory layer is demonstrated. Instead of using a planar elastomer (polydimethylsiloxane is used in this study) substrate, diverse relief structures are introduced to induce nonuniform and complex strain within the elastic substrate and thereby different distributions of the crack density of the AgNWs upon stretching, which plays an important role in the modulation of the gauge factor (GF). Analysis of the sensory layer and mechanical studies reveal that a lower height ratio and greater number of trenches enhance the sensor sensitivity, for example, reaching a GF of 926 at 9.6% in this study. The demonstration of wrist‐motion sensors using the technology illustrates the feasibility of using relief structures for various types of sensors and sensitivity ranges using an identical sensor layer. 相似文献
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Ning Tang Cheng Zhou Danyao Qu Ye Fang Youbin Zheng Wenwen Hu Ke Jin Weiwei Wu Xuexin Duan Hossam Haick 《Small (Weinheim an der Bergstrasse, Germany)》2020,16(24)
Achieving highly accurate responses to external stimuli during human motion is a considerable challenge for wearable devices. The present study leverages the intrinsically high surface‐to‐volume ratio as well as the mechanical robustness of nanostructures for obtaining highly‐sensitive detection of motion. To do so, highly‐aligned nanowires covering a large area were prepared by capillarity‐based mechanism. The nanowires exhibit a strain sensor with excellent gauge factor (≈35.8), capable of high responses to various subtle external stimuli (≤200 µm deformation). The wearable strain sensor exhibits also a rapid response rate (≈230 ms), mechanical stability (1000 cycles) and reproducibility, low hysteresis (<8.1%), and low power consumption (<35 µW). Moreover, it achieves a gauge factor almost five times that of microwire‐based sensors. The nanowire‐based strain sensor can be used to monitor and discriminate subtle movements of fingers, wrist, and throat swallowing accurately, enabling such movements to be integrated further into a miniaturized analyzer to create a wearable motion monitoring system for mobile healthcare. 相似文献
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Hybrid Copper‐Nanowire–Reduced‐Graphene‐Oxide Coatings: A “Green Solution” Toward Highly Transparent,Highly Conductive,and Flexible Electrodes for (Opto)Electronics 下载免费PDF全文
Alessandro Aliprandi Tiago Moreira Cosimo Anichini Marc‐Antoine Stoeckel Matilde Eredia Ugo Sassi Matteo Bruna Carlos Pinheiro César A. T. Laia Sara Bonacchi Paolo Samorì 《Advanced materials (Deerfield Beach, Fla.)》2017,29(41)
This study reports a novel green chemistry approach to assemble copper‐nanowires/reduced‐graphene‐oxide hybrid coatings onto inorganic and organic supports. Such films are robust and combine sheet resistances (<30 Ω sq?1) and transparencies in the visible region (transmittance > 70%) that are rivalling those of indium–tin oxide. These electrodes are suitable for flexible electronic applications as they show a sheet resistance change of <4% after 10 000 bending cycles at a bending radius of 1.0 cm, when supported on polyethylene terephthalate foils. Significantly, the wet‐chemistry method involves the preparation of dispersions in environmentally friendly solvents and avoids the use of harmful reagents. Such inks are processed at room temperature on a wide variety of surfaces by spray coating. As a proof‐of‐concept, this study demonstrates the successful use of such coatings as electrodes in high‐performance electrochromic devices. The robustness of the electrodes is demonstrated by performing several tens of thousands of cycles of device operation. These unique conducting coatings hold potential for being exploited as transparent electrodes in numerous optoelectronic applications such as solar cells, light‐emitting diodes, and displays. 相似文献
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Batteries: Foldable Electrode Architectures Based on Silver‐Nanowire‐Wound or Carbon‐Nanotube‐Webbed Micrometer‐Scale Fibers of Polyethylene Terephthalate Mats for Flexible Lithium‐Ion Batteries (Adv. Mater. 7/2018) 下载免费PDF全文
Chihyun Hwang Woo‐Jin Song Jung‐Gu Han Sohyun Bae Gyujin Song Nam‐Soon Choi Soojin Park Hyun‐Kon Song 《Advanced materials (Deerfield Beach, Fla.)》2018,30(7)
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Flexible Electrodes: Roll‐to‐Roll Production of Transparent Silver‐Nanofiber‐Network Electrodes for Flexible Electrochromic Smart Windows (Adv. Mater. 41/2017) 下载免费PDF全文
Sen Lin Xiaopeng Bai Haiyang Wang Haolun Wang Jianan Song Kai Huang Chang Wang Ning Wang Bo Li Ming Lei Hui Wu 《Advanced materials (Deerfield Beach, Fla.)》2017,29(41)
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Flexible Gallium Nitride: Flexible Gallium Nitride for High‐Performance,Strainable Radio‐Frequency Devices (Adv. Mater. 47/2017) 下载免费PDF全文
Nicholas R. Glavin Kelson D. Chabak Eric R. Heller Elizabeth A. Moore Timothy A. Prusnick Benji Maruyama Dennis E. Walker Jr. Donald L. Dorsey Qing Paduano Michael Snure 《Advanced materials (Deerfield Beach, Fla.)》2017,29(47)
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Aperture Control: An Electroactive,Tunable, and Frequency Selective Surface Utilizing Highly Stretchable Dielectric Elastomer Actuators Based on Functionally Antagonistic Aperture Control (Small 14/2016) 下载免费PDF全文
Jun‐Ho Choi Jaeho Ahn Jin‐Bong Kim Young‐Cheol Kim Jung‐Yong Lee Il‐Kwon Oh 《Small (Weinheim an der Bergstrasse, Germany)》2016,12(14):1817-1817
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Flexible Electronics: Flash‐Induced Self‐Limited Plasmonic Welding of Silver Nanowire Network for Transparent Flexible Energy Harvester (Adv. Mater. 5/2017) 下载免费PDF全文
Jung Hwan Park Geon‐Tae Hwang Shinho Kim Jeongmin Seo Hong‐Jin Park Kyoungsik Yu Taek‐Soo Kim Keon Jae Lee 《Advanced materials (Deerfield Beach, Fla.)》2017,29(5)