Facet‐Dependent Electrical Conductivity Properties of Silver Oxide Crystals. Issue 3 (10th January 2017)

• Record Type: Journal Article
• Authors: Tan, Chih‐Shan; Chen, Ying‐Jui; Hsia, Chi‐Fu; Huang, Michael H.
• Is Part Of: Chemistry, an Asian journal. Volume 12:Issue 3(2017)
• Page Start: 293
• Page End: 297
• Publication Date: 2017-01-10
• Subjects: band bending -- electrical conductivity -- facet-dependent properties -- nanocrystals -- silver oxide; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/asia.201601520
• Languages: English
• ISSNs: 1861-4728

Abstract

Abstract: Ag2 O cubes, truncated octahedra, rhombic dodecahedra, and rhombicuboctahedra were synthesized in aqueous solution. Two tungsten probes were brought into contact with a single particle for electrical conductivity measurements. Strongly facet‐dependent electrical conductivity behaviors have been observed. The {111} faces are most conductive. The {100} faces are moderately conductive. The {110} faces are nearly non‐conductive. When electrodes contacted two different facets of a rhombicuboctahedron, asymmetrical I–V curves were obtained. The {111} and {110} combination gives the best I–V curve expected for a p‐n junction with current flowing in one direction through the crystal but not in the opposite direction. Density of states (DOS) plots for varying number of different lattice planes of Ag2 O match with the experimental results, suggesting that the {111} faces are most electrically conductive. The thicknesses of the thin surface layer responsible for the facet‐dependent properties of Ag2 O crystals have been determined. Abstract : Strongly facet‐dependent electrical conductivity behaviors have been observed in Ag2 O crystals. When electrodes contacted any two different facets of a rhombicuboctahedron, asymmetrical I–V curves were obtained. Density of states plots for varying number of different lattice planes of Ag2 O match with the experimental results, suggesting that the {111} faces are most electrically conductive.