Glier Tomke E, Betker Marie, Grimm-Lebsanft Benjamin, Scheitz Sarah, Matsuyama Toru, Akinsinde Lewis O, Rübhausen Michael
Institut für Nanostruktur- und Festkörperphysik, Center for Free Electron Laser Science (CFEL), Universität Hamburg, Luruper Chaussee 149, D-22761, Hamburg, Germany.
Max-Planck-Institut für Struktur und Dynamik der Materie, Luruper Chaussee 149, D-22761 Hamburg, Germany.
Nanotechnology. 2021 Jun 14;32(36). doi: 10.1088/1361-6528/ac04a4.
Highly flexible and conductive nano-composite materials are promising candidates for stretchable and flexible electronics. We report on the strain-resistance relation of a silver-nanowire photopolymer composite during repetitive stretching. Resistance measurements reveal a gradual change of the hysteretic resistance curves towards a linear and non-hysteretic behavior. Furthermore, a decrease in resistance and an increase in electrical sensitivity to strain over the first five stretching cycles can be observed. Sensitivity gauge factors between 10 and 500 at 23% strain were found depending on the nanowire concentration and stretching cycle. We model the electrical behavior of the investigated silver nanowire composites upon repetitive stretching considering the strain induced changes in the local force distribution within the polymer matrix and the tunnel resistance between the nanowires by using a Monte Carlo method.
高度灵活且导电的纳米复合材料是可拉伸和柔性电子产品的理想候选材料。我们报告了银纳米线光聚合物复合材料在反复拉伸过程中的应变-电阻关系。电阻测量结果显示，滞后电阻曲线逐渐向线性和非滞后行为转变。此外，在前五个拉伸循环中，可以观察到电阻降低以及对应变的电灵敏度增加。根据纳米线浓度和拉伸循环，在23%应变下发现灵敏度系数在10到500之间。我们使用蒙特卡罗方法，考虑聚合物基体内局部力分布的应变诱导变化以及纳米线之间的隧道电阻，对所研究的银纳米线复合材料在反复拉伸时的电学行为进行建模。
