Organic-organic heteroepitaxy of red-, green-, and blue-emitting nanofibers.
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.
Simbrunner
Clemens
C
Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Austria. clemens.simbrunner@jku.at
Quochi
Francesco
F
Hernandez-Sosa
Gerardo
G
Oehzelt
Martin
M
Resel
Roland
R
Hesser
Günter
G
Arndt
Martin
M
Saba
Michele
M
Mura
Andrea
A
Bongiovanni
Giovanni
G
Sitter
Helmut
H
D000327:Adsorption; D016880:Anisotropy; D003116:Color; D003460:Crystallization; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry; D018625:Microscopy, Atomic Force / Q000379:methods; D046529:Microscopy, Electron, Transmission / Q000379:methods; D008856:Microscopy, Fluorescence / Q000379:methods; D057139:Nanofibers / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D013053:Spectrophotometry / Q000379:methods; D014961:X-Ray Diffraction
D005456:Fluorescent Dyes