Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/530
Title: Light-Induced ostwald ripening of organic nanodots to rods
Authors: Mahesh, S
Anesh Gopal
Rajasekaran, T
Ajayaghosh, A
Keywords: Polymers
CDTE Nanoparticles
Issue Date: 2-May-2012
Publisher: American Chemical Society
Citation: Journal of the American Chemical Society 134(17):7227-7230;02 May 2012
Abstract: Ostwald ripening allows the synthesis of 1D nanorods of metal and semiconductor nanoparticles.However, this phenomenon is unsuccessful with organic π-systems due to their spontaneous self-assembly to elongated fibers or tapes. Here we demonstrate the uses of light as a versatile tool to control the ripening of amorphous organic nanodots (ca. 15 nm) of an azobenzene-derived molecular assembly to micrometersized supramolecular rods. A surface-confined dipole variation associated with a low-yield (13−14%) trans−cis isomerization of the azobenzene moiety and the consequent dipole−dipole interaction in a nonpolar solvent is believed to be the driving force for the ripening of the nanodots to rods
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