| 초록 |
Nanocrystals of sodium tungsten oxides have been synthesized by a hydrothermal method at temperature of 200℃ for 24 hours in the presence of poly(sodium 4-styrene sulfonate) (PSS). The varieties of their morphology have been observed. Diameters and lengths of nanorods were significantly varied in ranges of 10 to70 nm and 100 nm to 1 μm, respectively, depending on PSS concentrations. The nanocrystals of sodium tungsten bronzes were transformed to near infrared shielding materials upon reduction, thus suggesting applications for electrochromic devices, solar cells, and gas sensors. Acknowledgments: This work was funded by the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy (K00060054-55505), and the Korea Research Foundation (2012-047716). |
