Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea.
Nat Commun. 2017 Jun 1;8:15650. doi: 10.1038/ncomms15650.
Implementing nanostructures on plastic film is indispensable for highly efficient flexible optoelectronic devices. However, due to the thermal and chemical fragility of plastic, nanostructuring approaches are limited to indirect transfer with low throughput. Here, we fabricate single-crystal AgCl nanorods by using a Cl plasma on Ag-coated polyimide. Cl radicals react with Ag to form AgCl nanorods. The AgCl is subjected to compressive strain at its interface with the Ag film because of the larger lattice constant of AgCl compared to Ag. To minimize strain energy, the AgCl nanorods grow in the [200] direction. The epitaxial relationship between AgCl (200) and Ag (111) induces a strain, which leads to a strain gradient at the periphery of AgCl nanorods. The gradient causes a strain-induced diffusion of Ag atoms to accelerate the nanorod growth. Nanorods grown for 45 s exhibit superior haze up to 100% and luminance of optical device increased by up to 33%.
在塑料薄膜上实现纳米结构对于高效的柔性光电设备是不可或缺的。然而，由于塑料的热和化学脆弱性，纳米结构化方法仅限于低通量的间接转移。在这里，我们通过在 Ag 涂层聚酰亚胺上使用 Cl 等离子体来制造单晶 AgCl 纳米棒。Cl 自由基与 Ag 反应形成 AgCl 纳米棒。由于 AgCl 的晶格常数大于 Ag，因此 AgCl 与 Ag 膜的界面处存在压缩应变。为了最小化应变能，AgCl 纳米棒沿[200]方向生长。AgCl(200)和 Ag(111)之间的外延关系诱导应变，导致 AgCl 纳米棒外围的应变梯度。这种梯度导致 Ag 原子的应变诱导扩散，从而加速纳米棒的生长。生长 45 秒的纳米棒表现出高达 100%的优异雾度和高达 33%的光学器件亮度增加。
