Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Austria.
ACS Nano. 2010 Oct 26;4(10):6244-50. doi: 10.1021/nn1018889.
Self-assembly processes and organic-organic heteroepitaxy are powerful techniques to obtain highly ordered molecular aggregates. Here we demonstrate that combining both methods allows not only to fabricate highly crystalline and uniaxially oriented self-assembled nanofibers but also to tune their polarized emission. We show that submonolayer coverage of sexithiophene on top of para-sexiphenyl nanofibers is sufficient to change their emission color from blue to green. Triband emission in the red, green, and blue is generated in nanofibers with thicker sexithiophene coverage, where layers of co-oriented crystals are separated by green-emitting molecular sheets.
自组装过程和有机-有机杂化外延是获得高度有序分子聚集体的有力技术。在这里，我们证明了结合这两种方法不仅可以制造出高度结晶和单轴取向的自组装纳米纤维，还可以调整它们的偏振发射。我们表明，在 para-sexiphenyl 纳米纤维的顶部覆盖亚单层的六噻吩足以将其发射颜色从蓝色变为绿色。在具有较厚六噻吩覆盖层的纳米纤维中，生成了红、绿、蓝三带发射，其中取向晶体层由发绿光的分子片隔开。
