Nanobelts, Nanocombs, and Nanowindmills of Wurtzite ZnS

Abstract

10:1, 55 nm) and was deposited by the co-evaporation of magnesium and silver metals, with deposition rates of 5 and 0.5 s ±1 , respectively. The other was LiF/ Al and was deposited by first evaporating LiF (0.5 nm) at a deposition rate of 0.1 s ±1 and then evaporating aluminum (400 nm) at a rate of 1±2 s ±1 . The cathode was then capped with silver metal (100 nm) by evaporating silver at a rate of 3 s ±1 . The effective area of the emitting diode was 9.00 mm 2 . Current, voltage, and light-intensity measurements were made simultaneously using a Keithley 2400 source meter and a Newport 1835-C optical meter equipped with a Newport 818-ST silicon photodiode. All chemicals used for EL devices were sublimed in vacuum prior to use.[**] Research sponsored by MDI N00014-95-1-1116 for the Office of Naval Research, NSF, and NASA. Fig. 1. a) SEM image of ZnS nanobelts and nanosaws grown from an alumina substrate. b,c) Distribution of the ZnS nanobelts on the substrate surface suggesting a ªweed growthº model.

In Situ Structure Evolution from Cu(OH)2 Nanobelts to Copper Nanowires

“…Nanobelts of ZnO, 1 3 PbO, 4 ZnS, 5 MgO, 6 and GaN 7 have been synthesized by a solid-vapor phase process. The as-synthesized oxide nanobelts are pure, structurally uniform, and single-crystalline, and most of them are free of dislocations.…”

Epitaxial growth of wafer-scale two-dimensional polytypic ZnS thin films on ZnO substrates

“…Zinc sulphide (ZnS) is one of the first semiconductor materials ever discovered, and is considered to be a highly promising building block for novel diverse applications, 15 such as ultraviolet light emitting diodes, 16 photodetectors, 17 flat panel displays, 18 thin films solar cells, 19 etc. ZnS has two structural forms -cubic sphalerite and hexagonal wurtzite, with large direct band gaps of 3.72 eV and 3.77 eV, 10,13,20,21 respectively, making it an ideal alternative to the cadmiumfree CuIJIn,Ga)Se 2 (CIGS) buffer layer. 19 The difference between the two structures is the sequence of atomic layer stacking parallel to {111} for cubic or {0001} for hexagonal planes in the form of ABCABC or ABAB.…”

Facile Synthesis of Nail-Shaped ZnO Microrods by Thermal Evaporation Technique in Ambient Air

“…In the present work, ZnO microcrystals were successfully fabricated by thermal evaporation of ZnS and ZnS/Zn source powders at 1100 C in air atmosphere. It is well known that ZnS decomposes at temperatures greater than 400 C in air and/or in oxidizing atmospheres, and ZnS produces Zn and S fumes at temperatures higher than 900 C. Therefore, ZnO and ZnS micro/nanocrystals have been successfully synthesized by thermal evaporation of ZnS powder in the temperature range of 950 1200 C in oxidizing or inert atmospheres [12][13][14] . In addition, in the present work, ZnO microrods with large top diameters were synthesized via thermal evaporation of ZnS and a mixture of ZnS with Zn in air atmosphere.…”