Electrical and network properties of flexible silver-nanowire composite electrodes under mechanical strain,Nanoscale

当前位置： X-MOL 学术 › Nanoscale › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Electrical and network properties of flexible silver-nanowire composite electrodes under mechanical strain
Nanoscale ( IF 5.8 ) Pub Date : 2020-11-25 , DOI: 10.1039/d0nr05734g
Tomke E. Glier _{1,

2,

3,

4,

5} , Marie Betker _{1,

2,

3,

4,

5} , Maximilian Witte _{1,

2,

3,

4,

5} , Toru Matsuyama _{4,

5,

6} , Lea Westphal _{1,

2,

3,

4,

5} , Benjamin Grimm-Lebsanft _{1,

2,

3,

4,

5} , Florian Biebl _{1,

2,

3,

4,

5} , Lewis O. Akinsinde _{1,

2,

3,

4,

5} , Frank Fischer _{4,

5,

7} , Michael Rübhausen _{1,

2,

3,

4,

5}

Affiliation

Flexible and conductive silver-nanowire photopolymer composites are fabricated and studied under mechanical strain. The initial resistances of the unstretched flexible composites are between 0.27 Ω mm⁻¹ and 1.2 Ω mm⁻¹ for silver-nanowire concentrations between 120 μg cm⁻² and 40 μg cm⁻². Stretching of the samples leads to an increased resistance by a factor of between 72 for 120 μg cm⁻² and 343 for 40 μg cm⁻² at elongations of 23%. In order to correlate network morphology and electrical properties, micrographs are recorded during stretching. The Fiber Image Network Evaluation (FINE) algorithm determines morphological silver-nanowire network properties under stretching. For unstretched and stretched samples, an isotropic nanowire network is found with only small changes in fiber orientation. Monte-Carlo simulations on 2D percolation networks of 1D conductive wires and the corresponding network resistance due to tunneling of electrons at nanowire junctions confirm that the elastic polymer matrix under strain exhibits forces in agreement with Hooke's law. By variation of a critical force distribution the resistance curves are accurately reproduced. This results in a model that is dominated by quantum-mechanical tunneling at nanowire junctions explaining the electrical behavior and the sensitivity of nanowire-composites with different filler concentrations under mechanical strain.

中文翻译：

机械应变下柔性银纳米线复合电极的电学和网络特性

在机械应变下制备并研究了柔性导电银纳米线光敏聚合物复合材料。对于银纳米线浓度在120μgcm ^-2至40μgcm ^-2之间，未拉伸的挠性复合材料的初始电阻在0.27Ωmm ^-1至1.2Ωmm ^-1之间。样品引线的拉伸增加的阻力由72之间的因数为120微克厘米^-2和343为40微克厘米^-2伸长率为23％。为了关联网络形态和电特性，在拉伸过程中记录显微照片。纤维图像网络评估（FINE）算法确定拉伸后的形态银-纳米线网络属性。对于未拉伸和拉伸的样品，发现了各向同性的纳米线网络，纤维取向只有很小的变化。对一维导线的二维渗流网络以及由于电子在纳米线结处的隧穿而引起的相应网络电阻的蒙特卡洛模拟，证实了弹性聚合物基体在应变下表现出的力符合胡克定律。通过改变临界力分布，可以精确地再现阻力曲线。

更新日期：2020-11-25

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11