Reference : Nanopatterned monolayers of an adsorbed chromophore
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Nanopatterned monolayers of an adsorbed chromophore
Frederich, Nadia [Université catholique de Louvain > > > >]
Duwez, Anne-Sophie mailto [Université de Liège - ULg > Département de chimie (sciences) > Nano-chimie et systèmes moléculaires >]
Nysten, Bernard [Université catholique de Louvain > > > >]
Muls, Benoit [Université catholique de Louvain > > > >]
Hofkens, Johan [Katholieke Universiteit Leuven - KUL > > > >]
Jonas, Alain M [Université catholique de Louvain > > > >]
Habib Jiwan, Jean-Louis [Université catholique de Louvain > > >]
Institute of Physics
Yes (verified by ORBi)
[en] patterned surfaces ; nanolithography
[en] A simple lift-off process was developed to rapidly fabricate nanopatterned photofunctional
surfaces. Dye molecules of a perylene derivative (PDID) were adsorbed irreversibly on clean
silicon through the holes of an electron-beam lithographied polymer mask. The subsequent
removal of the mask in a proper solvent results in PDID nanosized regions of width as small as
30 nm for stripes and of diameter as small as 120 nm for dots. Numerical analyses of atomic
force microscopy and laser-scanning confocal microscopy images show that the dye molecules
are confined to the regions defined by the lithographic process, with the integrated fluorescence
intensity being essentially proportional to the size of the nanofeatures. This demonstrates that a
simple organic lift-off process compatible with clean-room technology, and not involving any
chemical step, is able to produce photofunctional nanopatterned surfaces, even though the dye
is not chemically bonded to the silicon surface.

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