Atomic-Scale Study of Cation Ordering in Potassium Tungsten Bronze Nanosheets.

ABSTRACT: It has long been accepted that the formation of superlattices in hexagonal-based potassium tungsten bronzes is attributed to K vacancies only, together with small displacements of W cations. Here, the superlattices within potassium tungsten bronze nanosheets both structurally and spectroscopically at atomic resolution using comprehensive transmission electron microscopy techniques are studied. The multidimensional chemical analyses are realized by energy-dispersive X-ray spectroscopy, electron energy-loss spectroscopy, and X-ray photoelectron spectroscopy, the atomic-scale structures are characterized using aberration-corrected scanning transmission electron microscopy with high-angle annular-dark-field detector. The observed superstructures are mainly attributed to small amount of W vacan

SUBMITTER: Li L 

PROVIDER: S-EPMC5604398 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature