Vertically Aligned Sulfur-Doped ZnO Nanowires Synthesized via Chemical Vapor Deposition

Abstract

High-density ZnO nanowires doped with 4 atom % sulfur (S) and pure ZnO nanowires were grown vertically aligned on a silicon substrate. They were synthesized via chemical vapor deposition of a Zn or Zn/S powder mixture at 500 °C. The S-doped ZnO nanowires usually form bundles. The average diameter of the S-doped ZnO nanowires and ZnO nanowires is 20 and 50 nm, respectively. They consist of single-crystalline wurtzite ZnO crystals with a uniform growth direction of [001]. Elemental mapping reveals that the S doping takes place mainly at the surface of the nanowires with a thickness of a few nanometers. X-ray diffraction data suggest that the incorporation of S would expand the lattice constants of ZnO. The photoluminescence and cathodoluminescence of S-doped ZnO nanowires exhibit a significantly enhanced green emission band that comes from the S-doped surface region of the nanowires.

Electrochemical biosensor for the detection of H2O2 from living cancer cells based on ZnO nanosheets

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High-Performance, Flexible Enzymatic Glucose Biosensor Based on ZnO Nanowires Supported on a Gold-Coated Polyester Substrate

“…The cross-sections of the Zn NWs also appear to be homogeneous with an average diameter of 70-80 nm (and a small size distribution). The corresponding average length of these NWs is measured to be ∼300 nm from the low-magnification TEM image shown in Figure 2b (19,20). Figure 3 shows the corresponding GIXRD pattern of ZnO NWs electrodeposited on the Au-coated PET substrate.…”

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“…Furthermore, in some cases, ZnO displays dramatically impressive photo-catalytic activities compared with broadly studied TiO 2 [88,91,[151][152][153][154][155][156][157][158][159][160]. In addition, element doping including both metal and nonmetal (C, N, S) doping could lead to an enhanced photo-catalytic activity; interestingly, most non-metal dopings were reported in photo-catalytic water splitting [161][162][163][164][165][166][167][168].…”