Tyndall National Institute, University College Cork , Lee Maltings Complex, Dyke Parade, Cork, Ireland.
ACS Appl Mater Interfaces. 2017 Feb 8;9(5):4932-4940. doi: 10.1021/acsami.6b12995. Epub 2017 Jan 27.
Metal meshes have emerged as an important class of flexible transparent electrodes. We report on the characteristics of a new class of asymmetric meshes, tiled using a recently discovered family of pentagons. Micron-scale meshes were fabricated on flexible polyethylene terephthalate substrates via optical lithography, metal evaporation (Ti 10 nm, Pt 50 nm), and lift-off. Three different designs were assessed, each with the same tessellation pattern and line width (5 μm), but with different sizes of the fundamental pentagonal unit. Good mechanical stability was observed for both tensile strain and compressive strain. After 1000 bending cycles, devices subjected to tensile strain showed fractional resistance increases in the range of 8-17%, while devices subjected to compressive strain showed fractional resistance increases in the range of 0-7%. The performance of the pentagonal metal mesh devices as visible transparent heaters via Joule heating was also assessed. Rapid response times (∼15 s) at low bias voltage (≤5 V) and good thermal resistance characteristics (213-258 °C cm/W) were found using measured thermal imaging data. Deicing of an ice-bearing glass coupon on top of the transparent heater was also successfully demonstrated.
金属网格已经成为一类重要的柔性透明电极。我们报告了一类新的不对称网格的特性，这些网格是使用最近发现的一类五边形来铺设的。通过光学光刻、金属蒸发（Ti 10nm，Pt 50nm）和剥离，在柔性聚对苯二甲酸乙二醇酯衬底上制造出了微米级的网格。评估了三种不同的设计，每种设计都具有相同的镶嵌图案和线宽（5μm），但基本五边形单元的大小不同。拉伸应变和压缩应变都表现出良好的机械稳定性。经过 1000 次弯曲循环后，承受拉伸应变的器件的电阻增加了 8-17%，而承受压缩应变的器件的电阻增加了 0-7%。通过焦耳加热，评估了五边形金属网器件作为可见光透明加热器的性能。使用测量的热成像数据发现，在低偏置电压（≤5V）下具有快速响应时间（约 15s）和良好的热阻特性（213-258°C cm/W）。还成功地演示了在透明加热器顶部的有冰的玻璃优惠券的除冰。
