Confined conversion of CuS nanowires to CuO nanotubes by annealing-induced diffusion in nanochannels

Functional Nanomaterials Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Zhongguancun Beiyitiao 2, Haidianqu, Beijing 100190, China. .
Nanoscale Research Letters (Impact Factor: 2.48). 01/2011; 6(1):150. DOI: 10.1186/1556-276X-6-150
Source: PubMed

ABSTRACT Copper oxide (CuO) nanotubes were successfully converted from CuS nanowires embedded in anodic aluminum oxide (AAO) template by annealing-induced diffusion in a confined tube-type space. The spreading of CuO and formation of CuO layer on the nanochannel surface of AAO, and the confinement offered by AAO nanochannels play a key role in the formation of CuO nanotubes.

  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The CuOx NW was synthesized by low-cost and large-scale electrochemical process with AAO membranes at room temperature and its resistive switching has been demonstrated. The switching characteristic exhibits forming-free and low electric-field switching operation due to coexistence of significant amount of defects and Cu nanocrystals in the partially oxidized nanowires. The detailed resistive switching characteristics of CuOx NW systems have been investigated and possible switching mechanisms are systematically proposed through the microstructural and chemical analysis via transmission electron microscopy (TEM).
    ACS Applied Materials & Interfaces 08/2014; 6(19). DOI:10.1021/am502741m · 5.90 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Nanoscale metal oxide materials have been attracting much attention because of their unique size- and dimensionality-dependent physical and chemical properties as well as promising applications as key components in micro/nanoscale devices. Cupric oxide (CuO) nanostructures are of particular interest because of their interesting properties and promising applications in batteries, supercapacitors, solar cells, gas sensors, bio sensors, nanofluid, catalysis, photodetectors, energetic materials, field emissions, superhydrophobic surfaces, and removal of arsenic and organic pollutants from waste water. This article presents a comprehensive review of recent synthetic methods along with associated synthesis mechanisms, characterization, fundamental properties, and promising applications of CuO nanostructures. The review begins with a description of the most common synthetic strategies, characterization, and associated synthesis mechanisms of CuO nanostructures. Then, it introduces the fundamental properties of CuO nanostructures, and the potential of these nanostructures as building blocks for future micro/nanoscale devices is discussed. Recent developments in the applications of various CuO nanostructures are also reviewed. Finally, several perspectives in terms of future research on CuO nanostructures are highlighted.
    Progress in Materials Science 03/2014; 60:208–337. DOI:10.1016/j.pmatsci.2013.09.003 · 25.87 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Effects of functionalization materials on the selectivity of SnO2 nanorod gas sensors were examined by comparing the responses of SnO2 one-dimensional nanostructures functionalized with CuO and Pd to ethanol and H2S gases. The response of pristine SnO2 nanorods to 500 ppm ethanol was similar to 100 ppm H2S. CuO-functionalized SnO2 nanorods showed a slightly stronger response to 100 ppm H2S than to 500 ppm ethanol. In contrast, Pd-functionalized SnO2 nanorods showed a considerably stronger response to 500 ppm ethanol than to 100 ppm H2S. In other words, the H2S selectivity of SnO2 nanorods over ethanol is enhanced by functionalization with CuO, whereas the ethanol selectivity of SnO2 nanorods over H2S is enhanced by functionalization with Pd. This result shows that the selectivity of SnO2 nanorods depends strongly on the functionalization material. The ethanol and H2S gas sensing mechanisms of CuO- and Pd-functionalized SnO2 nanorods are also discussed.
    Applied Physics A 11/2014; 117(3):1259-1267. DOI:10.1007/s00339-014-8514-0 · 1.69 Impact Factor

Full-text (3 Sources)

Available from
May 26, 2014