Reversible Chemochromic MoO3 Nanoribbons through Zerovalent Metal Intercalation

Molybdenum trioxide (alpha-MoO3), is a 2D layered oxide with Use in electrochromic and photochromic devices owing to its ability to reversibly change color between transparent and light blue with electrochemical or hydrogen intercalation. Despite it significant application,potential, MoO3 performance is largely limited by the destructiveness of these intercalation techniques, insignificant Coloration, and slow,color response. We demonstrate a reversible chemochromic method, using intercalation of zerovalent metals into alpha-MoO3 nanoribbons (Sn, similar to 2 at. %; Co, similar to 4 at. %), to chemically alter MoO3 from trans-parent white to a deep blue indigo, resulting in enhanced coloration and Chemically tunable-optical properties. We present two strategies to reversibly tune the color response of MoO3,nanoribbons. Chromism can be reversed (i) by complete oxidative deintercalation with-hydrogen-peroxide or iodine or (ii) through a temperature-driven disorder-order phase transition of the-intercalated zerovalent metal.