Nanocrystal based metamaterials fabrication by direct nanoimprinting

In this study, we present the direct nanoimprinting of colloidal nanocrystals for the functional metamaterials nanostructures fabrication. The coupled silver colloidal nanocrystal dispersion are used as a direct nanoimprinting... [ view full abstract ]

In this study, we present the direct nanoimprinting of colloidal nanocrystals for the functional metamaterials nanostructures fabrication. The coupled silver colloidal nanocrystal dispersion are used as a direct nanoimprinting resin, and the PDMS soft mold is used as a imprinting stamp. [1] Using the direct nanoimpring process, the Ag nanocrystal-based nanostructures were fabricated over large areas of up to a few centimeters of nano-pillars, nano-rods, and nano-holes. The direct nanoimprinting with room temperature process allows for the demonstration of these plasmonic nanoscale nanostructures on the rigid substrates as well as, on the various flexible polymers substrates. The optical plasmonic resonances of the nanostructures were tuned by the choice of nanocrystal building block (Ag), the dielectric function of the nanocrystal nanostructure, and the nanostructure geometry and periodicity.

This work was supported by Institute for Information & communications
Technology Promotion(IITP) grant funded by the Korea government(MSIP) (B0117-16-1004) and by the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning (NRF-2013M3C1A3063046).

Reference
[1] S-H Hong et al, “Chemically Tailored Dielectric-to-Metal Transition for the Design of Metamaterials from Nanoimprinted Colloidal Nanocrystals”, Nanolett. 13(2) 350-357 (2013)