KOSEN 한인과학기술자네트워크

Functional Thin Films Based on Layer-by-Layer Deposition

The Layer-by-Layer (LbL) deposition has received intensive attention in past decade due to its simple fabrication procedure
and yet broad potential applications such as functional ultra thin multilayer films, surface modification of substrates, and
hybridization of functional nanomaterials. Our group has the reputation in the development of a new class of LbL deposition
based on the spin self-assembly process, which is much simpler and faster than the conventional dip-based deposition method.
This fabrication method results in the highly ordered internal structure suitable for high performance devices such as
ultra thin capacitors and bio- and environmental sensors. In addition, our research group has recently extended
the LbL deposition involving various functional nano-objects such as nanoparticles, nanowires, and micelles,
to upgrade the functions embedded in thin films to the next dimension.

Nanoporous Materials for Optoelectronic Applications

Nanoporous organic and/or inorganic thin films provide a variety of potential applications such as intermetallic dielectric
materials, optical components, sensor elements, and substrates for biological applications. Nanoporous structure can generally
be created by the introduction of pore-generating materials (porogens) to thin films followed by the selective removal of such
porogens by post treatments such as solvent etching, UV-, thermal-, acid-, or salt-treatment. Our research group has reported
the world-best nanoporous thin films with balanced mechanical and low dielectric properties for next generation semiconductor
devices, based on judiciously designed organosilicates and norbornene copolymers. In addition, our laboratory has recently
worked out a strategy to prepare well-defined hollow inorganic nanospheres, which can be applied to areas such as solid-state
lighting and photocatalysts.