W₅O₁₄ Nanowires

Abstract

We report on the synthesis of quasi‐1D W5O14 crystals using NiI2 as a growth promoter. Photoelectron spectroscopy revealed the metallic conductivity of the W5O14 nanowires, which was also confirmed by direct‐transport measurements on a double‐stranded nanowire. Scanning electron microscopy and transmission electron‐diffraction data are correlated with details of crystal growth revealing the possible mechanism of the formation of this rarely synthesized phase, which was reported as a homogeneous phase only in 1978 by McColm et al., and in the meantime has been declared as a compound that is rare.

Electrochromic properties of tungsten oxide nanowires fabricated by electrospinning method

“…Among such transition metal oxides, tungsten oxide with various oxidation states of WO 3Àx has been recognized as one of the most efficient candidate compared with other electrochromic materials due to its fast optical response time, reversible color changes and high coloration efficiency [2,3,7]. In particular, its one-dimensional (1D) nanostructures in forms of nanorods, nanowires or nanotubes are recently of great interest due to their unique optical, electrical and optoelectrical properties [8,9].…”

Tetragonal tungsten oxide nanobelts synthesized by chemical vapor deposition

“…With salient electrochromic, optochromic, gaschromic, and catalytic properties, tungsten oxides (WO x ) are of great interest, being promising in applications such as flat panel displays, 'smart windows', semiconductor gas sensors, and photocatalysts [6][7][8][9]. In the past few years, diverse forms of WO x nanowires have been synthesized including monoclinic W 18 O 49 nanowires [10,11], orthorhombic W 3 O 8 nanowires [12], quasi-1D W 5 O 14 crystals [13], two-dimensional tetragonal WO 2.9 nanowire networks [14], monoclinic WO 3 nanowires [11,15], and cubicstructured WO 3 nanowires [16]. However, WO x nanobelts are less observed and studied [17,18], although many other semiconductor oxides were vastly synthesized in nanobelts form such as ZnO, SnO 2 , In 2 O 3 , CdO, Ga 2 O 3 , and PbO 2 [19].…”

Combustion synthesis and excellent photocatalytic degradation properties of W18O49

“…Among tungsten oxide (WO 3-x ), W 18 O 49 has been extensively studied due to its unusual defect structures and novel properties in the nanometer regime, which allow it to be an effective candidate in various applications. 5 This characteristic endows W 18 O 49 with better conductivity, which can be assembled for electrochromic devices and smart supercapacitor. 5 This characteristic endows W 18 O 49 with better conductivity, which can be assembled for electrochromic devices and smart supercapacitor.…”