Dipole-assisted self-assembly of light-emitting p-nP needles on mica

Balzer, F.; Rubahn, H.-G.
December 2001
Applied Physics Letters;12/3/2001, Vol. 79 Issue 23, p3860
Academic Journal
We report on dipole-assisted, self-assembled formation of p-6P and p-5P needles on cleaved and heated mica (0001) surfaces. Low-energy electron diffraction (LEED) reveals that the needles are single crystalline with the (11¯1¯) face parallel to the surface, consisting of parallel stacks of laying molecules oriented along the direction of microscopic dipoles on the mica surface. They have submicrometer cross-sectional dimensions and lengths as large as millimeters. Moreover, due to the strong dipole confinement of individual molecules, the needles form large domains with parallel oriented entities. A pronounced optical dichroism agrees with the findings from LEED. © 2001 American Institute of Physics.


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