Photoinduced translational molecular mobility in solid nanostructured azo dye films

A new mechanism controlling the molecular motion in thin azo-containing films during a photoinduced change in the surface nanorelief is found. It is shown experimentally that exposure of a solid AD-1 azo dye, deposited on a glass substrate, to incoherent linearly polarised light leads to formation o...

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Bibliographic Details
Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2011-11, Vol.41 (11), p.1003-1009
Main Authors: Ezhov, A A, Kozenkov, V M, Magnitskii, Sergey A, Nagorskii, Nikolay M, Panov, Vladimir I
Format: Article
Language:English
Subjects:
AZO DYES
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
GLASS
MASS
MOLECULES
NANOSTRUCTURES
NONLINEAR PROBLEMS
SOLIDS
SPHERICAL CONFIGURATION
SUBSTRATES
SURFACE TENSION
SURFACES
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Summary:A new mechanism controlling the molecular motion in thin azo-containing films during a photoinduced change in the surface nanorelief is found. It is shown experimentally that exposure of a solid AD-1 azo dye, deposited on a glass substrate, to incoherent linearly polarised light leads to formation of nanostructures with a characteristic size of 200 nm, which are similar to droplets of melt of this dye on the same substrate. It is shown that photoinduced mass transport in a solid AD-1 azo dye film can be explained by the mobility of molecules related to their trans-cis-photoisomerisation, which leads to film softening with subsequent formation of spherical protrusions under surface tension forces.
ISSN:1063-7818
1468-4799
DOI:10.1070/QE2011v041n11ABEH014728