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一维导电材料例如纳米线,大量应用于柔性压力传感器中. 但是一维材料和基底之间接触时相互作用力较弱,使得传感器灵敏度、响应时间、和循环寿命等性能指标有待进一步提高. 针对这些问题,设计了石墨烯/石墨烯卷轴多分子层复合薄膜作为传感器导电层. 石墨烯卷轴具有一维结构,而石墨烯的二维结构可以牢固地固定卷轴,以确保高导电性复合薄膜与基底之间的粘附性,同时整体结构的导电通道得到了增加. 由于一维和二维结构的协同效应,实现了应变灵敏度系数3.5 kPa-1、 响应时间小于50 ms、能够稳定工作1000次以上的压阻传感器. 相似文献
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We study algebraic geometric codes obtained from rational normal scrolls. We determine the complete weight hierarchy and spectrum
of these codes.
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Highly Sensitive Flexible Pressure Sensors based on Graphene/Graphene Scrolls Multilayer Hybrid Films 下载免费PDF全文
Yi-heng Zhai Tao Wang Zhi-kai Qi Xiang-hua Kong Hang-xun Xu Heng-xing Ji 《化学物理学报(中文版)》2020,33(3):365-370
In recent years, flexible pressure sensors have attracted much attention owing to their potential applications in motion detection and wearable electronics. As a result, important innovations have been reported in both conductive materials and the underlying substrates, which are the two crucial components of a pressure sensor. 1D materials like nanowires are being widely used as the conductive materials in flexible pressure sensors, but such sensors usually exhibit low performances mainly due to the lack of strong interfacial interactions between the substrates and 1D materials. In this paper, we report the use of graphene/graphene scrolls hybrid multilayers films as the conductive material and a micro-structured polydimethylsiloxane substrate using Epipremnum aureum leaf as the template to fabricate highly sensitive pressure sensors. The 2D structure of graphene allows to strongly anchor the scrolls to ensure the improved adhesion between the highly conductive hybrid films and the patterned substrate. We attribute the increased sensitivity (3.5 kPa\begin{document}$ ^{-1} $\end{document} ), fast response time (\begin{document}$ < $\end{document} 50 ms), and the good reproducibility during 1000 loading-unloading cycles of the pressure sensor to the synergistic effect between the 1D scrolls and 2D graphene films. Test results demonstrate that these sensors are promising for electronic skins and motion detection applications. 相似文献
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在双涡卷混沌吸引子的基础上,以变型蔡氏电路和四阶蔡氏电路为例,提出一种研究四维系统中多涡卷混沌与超混沌吸引子的新方法.根据这一方法,从数学上找到了一种能产生多涡卷的递推规律,其特点是只需给定三个初始值ma,mb和x1,由文中所导出的递推公式,可确定多涡卷吸引子中分段线性奇函数的各个转折点和平衡点的值,从而能在四维系统中产生多涡卷混沌与超混沌吸引子,并且这种方法可以推广到产生任意多个涡卷的情形,因此,它具有一般的规律性.理论分析、计算机模拟和电路仿真结果证明了该方法的可行性. 相似文献
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Gert Monstad Hana 《Mathematische Nachrichten》2006,279(3):242-254
We study Cossec's ? ‐function, which is defined for divisors with positive self‐intersection on an Enriques surface. In this paper we study the existence of pairs (C 2, ? (C )) with C an irreducible curve. The ? ‐function gives in a natural way scrolls containing Enriques surfaces. We compute scroll types to some of these scrolls. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
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In this paper we study the Brill–Noether theory of invertible subsheaves of a general, stable rank-two vector bundle on a
curve C with general moduli. We relate this theory to the geometry of unisecant curves on smooth, non-special scrolls with hyperplane
sections isomorphic to C. Most of our results are based on degeneration techniques.
The first three authors are members of G.N.S.A.G.A. at I.N.d.A.M. “Francesco Severi”. 相似文献
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