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@ARTICLE{Yadavalli:155369,
author = {Yadavalli, Nataraja Sekhar and Korolkov, Denis and Moulin,
Jean-François and Krutyeva, Margarita and Santer, Svetlana},
title = {{P}robing {O}pto-{M}echanical {S}tresses within
{A}zobenzene-{C}ontaining {P}hotosensitive {P}olymer {F}ilms
by a {T}hin {M}etal {F}ilm {P}laced {A}bove},
journal = {ACS applied materials $\&$ interfaces},
volume = {6},
number = {14},
issn = {1944-8252},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2014-04538},
pages = {11333 - 11340},
year = {2014},
abstract = {Azo-modified photosensitive polymers offer the interesting
possibility to reshape bulk polymers and thin films by
UV-irradiation while being in the solid glassy state. The
polymer undergoes considerable mass transport under
irradiation with a light interference pattern resulting in
the formation of surface relief grating (SRG). The forces
inscribing this SRG pattern into a thin film are hard to
assess experimentally directly. In the current study, we are
proposing a method to probe opto-mechanical stresses within
polymer films by characterizing the mechanical response of
thin metal films (10 nm) deposited on the photosensitive
polymer. During irradiation, the metal film not only deforms
along with the SRG formation but ruptures in a regular and
complex manner. The morphology of the cracks differs
strongly depending on the electrical field distribution in
the interference pattern, even when the magnitude and the
kinetics of the strain are kept constant. This implies a
complex local distribution of the opto-mechanical stress
along the topography grating. In addition, the neutron
reflectivity measurements of the metal/polymer interface
indicate the penetration of a metal layer within the
polymer, resulting in a formation of a bonding layer that
confirms the transduction of light-induced stresses in the
polymer layer to a metal film.},
cin = {ICS-1 / Neutronenstreuung ; JCNS-1 / JCNS (München) ;
Jülich Centre for Neutron Science JCNS (München) ;
JCNS-FRM-II},
ddc = {540},
cid = {I:(DE-Juel1)ICS-1-20110106 / I:(DE-Juel1)JCNS-1-20110106 /
I:(DE-Juel1)JCNS-FRM-II-20110218},
pnm = {451 - Soft Matter Composites (POF2-451) / 54G - JCNS
(POF2-54G24)},
pid = {G:(DE-HGF)POF2-451 / G:(DE-HGF)POF2-54G24},
experiment = {EXP:(DE-MLZ)REFSANS-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000339472100066},
pubmed = {pmid:24995460},
doi = {10.1021/am501870t},
url = {https://juser.fz-juelich.de/record/155369},
}