The synthesis of molecules consisting of various combinations of phenylene and thiophene groups and the subsequent vacuum growth of needle-shaped nanoaggregates on specific surfaces allows us a systematic investigation of the transition between single parallel and multiple aligned needle ('nanofiber') growth. The former growth mode is observed for blue light emitting phenylene fibers, whereas the latter growth mode appears for single crystalline fibers made from green- and orange-light emitting oligo-thiophenes and thiophene/phenylene co-oligomers. In all cases the tailored bottom-up growth results in strongly polarized light emission along specific surface directions. The results are compared to those found for nanoaggregates made from less rod-like organic molecules, namely rubrene and POPOP.
|Title of host publication||SPIE Proceedings|
|Number of pages||12|
|Publication status||Published - 2007|
|Event||Photonics West 2007 - San Jose, United States|
Duration: 24. Aug 2010 → …
|Conference||Photonics West 2007|
|Period||24/08/2010 → …|