Ts. Phely-bobin et al., Site-specific self-assembly of Si/SiOx nanoparticles on micropatterned poly(dimethylsiloxane) thin films, SYNTH METAL, 116(1-3), 2001, pp. 439-443
Recent efforts have focused on the design of 20 and 3D assemblies with the
goal of creating highly ordered supramolecular structures. Ultrathin films
patterned with topologically different surface chemical functionality may b
e used as a template for such elaborate architectures. Surface functionaliz
ation can be used to impose site-specific assembly and can further lead to
the fabrication of highly ordered structures, which have a great importance
in the microelectronic and optoelectronic industry. Recently, we have demo
nstrated the fabrication of surface modified Si/SiOx nanoparticles and thei
r self-assembly on various surfaces. We presently report the specific self-
assembly of Si/SiOx nanoparticles on poly(dimethylsiloxane) (PDMS) spin-cas
t films. The desire to create regions of SiOx, which coexist with silicones
in a two-dimensional film, is motivated by the difference in surface energ
ies and affinity contrast between SiOx and PDMS. As presently reported, the
selectivity of the deposition of Si/SiOx nanoparticles on PDMS versus UV/O
-3 converted SiOx offers a gnat opportunity for the fabrication of periodic
structures with large modulation in refractive index. (C) 2001 Published b
y Elsevier Science B.V.