Hiekel Karl, Jungblut Swetlana, Georgi Maximilian, Eychmüller Alexander
Physical Chemistry, Technische Universität Dresden, Bergstrasse 66b, 01062, Dresden, Germany.
Angew Chem Int Ed Engl. 2020 Jul 13;59(29):12048-12054. doi: 10.1002/anie.202002951. Epub 2020 May 18.
As there is a great demand of 2D metal networks, especially out of gold for a plethora of applications we show a universal synthetic method via phase boundary gelation which allows the fabrication of networks displaying areas of up to 2 cm . They are transferred to many different substrates: glass, glassy carbon, silicon, or polymers such as PDMS. In addition to the standardly used web thickness, the networks are parametrized by their fractal dimension. By variation of experimental conditions, we produced web thicknesses between 4.1 nm and 14.7 nm and fractal dimensions in the span of 1.56 to 1.76 which allows to tailor the structures to fit for various applications. Furthermore, the morphology can be tailored by stacking sheets of the networks. For each different metal network, we determined its optical transmission and sheet resistance. The obtained values of up to 97 % transparency and sheet resistances as low as 55.9 Ω/sq highlight the great potential of the obtained materials.
由于对二维金属网络有巨大需求，尤其是对大量应用中的金以外的金属网络有需求，我们展示了一种通过相界凝胶化的通用合成方法，该方法允许制造面积达2平方厘米的网络。它们被转移到许多不同的基底上：玻璃、玻碳、硅或聚合物，如聚二甲基硅氧烷（PDMS）。除了标准使用的网厚外，网络还通过其分形维数进行参数化。通过改变实验条件，我们制备出了厚度在4.1纳米至14.7纳米之间且分形维数在1.56至1.76范围内的网络，这使得能够定制结构以适应各种应用。此外，通过堆叠网络片层可以定制形态。对于每个不同的金属网络，我们测定了其光透射率和薄层电阻。所获得的高达97%的透明度和低至55.9Ω/sq的薄层电阻值突出了所获材料的巨大潜力。
