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Transparent ZrO 2 -polydimethylsiloxane (PDMS) nanocomposites with high refractive index were prepared by dispersing ZrO 2 nanoparticles in a PDMS matrix via ligand molecule engineering. The ligand molecule consists of a diamine head group that adsorbs strongly onto the ZrO 2 nanoparticles, and a siloxane tail group with a double-tailed structure that can be easily stretched within the PDMS matrix and yields a greater steric hindrance compared to single-tailed structure. The transmission electron micrograph shows that the designed Si-based ligand molecule has a role to play in keeping ZrO 2 nanoparticles fully-dispersed even after the ZrO 2 nanoparticles were transferred into the PDMS matrix. UV-vis spectra indicate that ZrO 2 -PDMS nanocomposite had a high transparency of 93.3% in the whole visible range. The refractive index of the ZrO 2 -PDMS nanocomposite could be varied from 1.39 to 1.65 simply by increasing the ZrO 2 content from 0 to 20.8% v/v.

By adjusting the polyvinylpyrrolidone (PVP) capping layer thickness on silver nanowire networks, improved electrical and optical properties were obtained, which was confirmed both experimentally and theoretically (Molecular dynamics and Monte Carlo simulations).

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CdSe nanocrystals ͑NCs͒ have been decorated on single-walled carbon nanotubes ͑SWCNTs͒ by combining a method of chemically modified substrate along with gate-bias control. CdSe/ ZnS core/shell quantum dots were negatively charged by adding mercaptoacetic acid. The silicon oxide substrate was decorated by octadecyltrichlorosilane and converted to hydrophobic surface. The negatively charged CdSe NCs were adsorbed on the SWCNT surface by applying a negative gate bias. The measured photocurrent clearly demonstrates that CdSe NCs decorated SWCNT can be used for photodetector and solar cell that are operable over a wide range of wavelengths.