Surface plasmon resonance effect for a new structure of Ag/WO3 nanorod-shell nanocomposits and application in smart window

New chromogenic structures such as hybrids and nanocomposites can be enhanced the electrochromic performance due to wide interest on account of their potential application values in smart window, low-power display, automobile anti-reflect mirror and electronic papers. In this study, we synthesized the Ag nanorods with different aspect ratios by hydrothermal method. The synthesized Ag nanorods with different sizes are covered by tungsten oxide shells in two steps (Ag-1-W, Ag-2-W and Ag-3-W). The different size of Ag particles exhibit different surface palsmon effect and subsequently this phenomenon effects on electrochromic results. Electrochromic performance of Ag/WO3 nanorod-shell thin films on FTO-coated glass substrates are investigated in 1 M solution of LiClO4-PC as electrolyte in visible region. In particular, a significant optical modulation (32.33%, 33.60% and 36.81% at 633 nm, fast switching speed (5.7 s-6.3 s, 5.3 s-5.7 s and 5.0 s-5.5s for colored-bleached states) and high coloration efficiency (100, 78.9 and 94.28 cm(2)C(-1) at 633 nm) are achieved for these structures. (C) 2018 Elsevier B.V. All rights reserved.