Mahesh, Sankarapillai ; Gopal, Anesh ; Thirumalai, Rajasekaran ; Ajayaghosh, Ayyappanpillai (2012) Light-induced ostwald ripening of organic nanodots to rods Journal of the American Chemical Society, 134 (17). pp. 7227-7230. ISSN 0002-7863
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Official URL: http://pubs.acs.org/doi/abs/10.1021/ja301002g
Related URL: http://dx.doi.org/10.1021/ja301002g
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 micrometer-sized 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.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Chemical Society. |
ID Code: | 96139 |
Deposited On: | 05 Dec 2012 09:02 |
Last Modified: | 05 Dec 2012 09:02 |
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