Wang Yangyang, Wang Jianping, Kong Xiangyi, Gong Min, Zhang Liang, Lin Xiang, Wang Dongrui
Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing100083, China.
Beijing Key Laboratory for Bioengineering and Sensing Technology, University of Science and Technology Beijing, Beijing100083, China.
Langmuir. 2022 Oct 18;38(41):12682-12688. doi: 10.1021/acs.langmuir.2c02176. Epub 2022 Oct 3.
Capillary-force-induced welding can effectively reduce the contact resistance between two silver nanowires (AgNWs) by merging the NW-NW junctions. Herein, we report a model for quantifying the capillary force between two nano-objects. The model can be used to calculate the capillary force generated between AgNWs and carbon nanotubes (CNTs) during water evaporation. The results indicate that the radius of one-dimensional nano-objects is crucial for capillary-force-induced welding. AgNWs with larger radii can generate a greater capillary force () at NW-NW junctions. In addition, for AgNW/CNT hybrid films, the use of CNTs with a radius close to that of AgNWs can result in a larger capillary force () at NW-CNT junctions. The reliability of the model is verified by measuring the change in sheet resistance before and after capillary-force-induced welding of a series of AgNW and AgNW/CNT conductive films with varying radii.
毛细力诱导焊接可通过合并纳米线-纳米线结有效地降低两根银纳米线（AgNWs）之间的接触电阻。在此，我们报告了一种用于量化两个纳米物体之间毛细力的模型。该模型可用于计算水蒸发过程中AgNWs与碳纳米管（CNTs）之间产生的毛细力。结果表明，一维纳米物体的半径对于毛细力诱导焊接至关重要。半径较大的AgNWs在纳米线-纳米线结处可产生更大的毛细力（）。此外，对于AgNW/CNT混合薄膜，使用半径与AgNWs接近的CNTs可在纳米线-碳纳米管结处产生更大的毛细力（）。通过测量一系列不同半径的AgNW和AgNW/CNT导电薄膜在毛细力诱导焊接前后的薄层电阻变化，验证了该模型的可靠性。
