Moreels Iwan
Department of Chemistry, Ghent University, Krijgslaan 281-S3, 9000 Gent, Belgium.
Nano Lett. 2020 May 13;20(5):2941-2942. doi: 10.1021/acs.nanolett.0c01373. Epub 2020 Apr 9.
Progression from random orientation of 2D CdSe nanoplatelets to ordered close-packed thin films enables us to exploit the in-plane dipole moment of the band-edge transition on a macroscopic scale and gain control over the direction of charge and energy transport within the film. Momper et al. show how this can be achieved by tuning the solvent evaporation rate during deposition. They are able to switch from thermodynamically to kinetically controlled conditions for the film formation, resulting in ordered films with either face-down or edge-up alignment of the 2D nanoplatelets.
二维CdSe纳米片从随机取向发展到有序密堆积薄膜，使我们能够在宏观尺度上利用带边跃迁的面内偶极矩，并控制薄膜内电荷和能量传输的方向。蒙珀等人展示了如何通过在沉积过程中调节溶剂蒸发速率来实现这一点。他们能够从热力学控制条件切换到动力学控制条件来形成薄膜，从而得到二维纳米片呈面朝下或边缘朝上排列的有序薄膜。
