| 초록 |
Transition metal oxide materials presents a sharp transition of metal and insulator (TMI) depending on compositions and temperatures, and are finding many useful applications in electronic, magnetic and optical devices. Above TMI, Sm1-xCaxMnO3 reflects the most of infrared light with 5~15 micrometer wavelengths because of charge delocalization in metallic state. For this potential infrared thermochromic switching, we explored a simple method to synthesize the perovskite on glass substrates, which can resultantly be used for smart, energy-saving windows. By simply coating the aqueous solution of metal nitrates and poly(acrylic acid), followed by crystallizing in a furnace, we could cover the substrate surface with perovskite nanorods with 20 nm diameter and 100 nm length in average. Our synthetic route avoids conventional sol-gel processes utilizing citric acids or poly(acryl amide) while presenting processing-convenience and superior infrared screening efficiency. |
