Yeon Sik Jung

KAIST- Korean Institute for Science and Technology, Seoul, Korea

Despite their high demand and various promising applications, the fabrication of 3D nanostructures is not straightforward. We suggest that nanotranfer printing (nTP) may be a more practical solution controllably build 3D nanostructures. An nTP technique is usually composed of several steps - preparation of nanostructured elastomeric replica, deposition of functional materials, and transfer of functional nanostructures. The nanostructures can be transferred onto other substrates by contacting the mold on the surface of the receiver substrate. To overcome the issues of resolution limit (typically several tens of nm) and low transfer yield of conventional nTP, we developed and demonstrated that solvent-assisted nanotransfer printing (S-nTP) can controllably generate extremely fine (down to sub-10 nm) functional nanostructures with excellent transfer yield (~100%). The excellent uniformity of the printed nanostructures is another advantage of nTP, as it makes it possible to obtain highly uniform and reproducible 3D nanostructures composed of different materials. In this talk, we will introduce several applications of 3D hybrid nanostructures such as platinum nanocatalysts with outstanding performances and durability and plasmonic nanostructures for surface-enhanced Raman spectroscopy.