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

Mu C, He J - Nanoscale Res Lett (2011)

Bottom Line: 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.

View Article: PubMed Central - HTML - PubMed

Affiliation: 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. jhhe@mail.ipc.ac.cn.

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.

No MeSH data available.


XRD patterns of as-prepared CuS nanowires (a) and CuO nanotubes (b) using AAO template with 50-nm pores.
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Figure 1: XRD patterns of as-prepared CuS nanowires (a) and CuO nanotubes (b) using AAO template with 50-nm pores.

Mentions: The purity and crystallinity of as-prepared CuS nanowires and CuO nanotubes were characterized by XRD measurements before removing the AAO membrane. Figure 1 shows XRD patterns collected in the 2-theta range of 20-70° for the samples of both CuS nanowire and CuO nanotube. All the peaks in Figure 1a could be ascribed to hexagonal CuS (cell constants a = 3.796 Å, c = 16.38 Å; JCPDS Card No. 78-0876). The only strong XRD peak in Figure 1a indicates that the CuS nanowires have preferred (110) orientation, and all the peaks in Figure 1b could be readily indexed as monoclinic CuO (cell constants a = 4.6 Å, b = 3.4 Å, c = 5.1 Å; JCPDS Card No. 80-1917).


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

Mu C, He J - Nanoscale Res Lett (2011)

XRD patterns of as-prepared CuS nanowires (a) and CuO nanotubes (b) using AAO template with 50-nm pores.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211201&req=5

Figure 1: XRD patterns of as-prepared CuS nanowires (a) and CuO nanotubes (b) using AAO template with 50-nm pores.
Mentions: The purity and crystallinity of as-prepared CuS nanowires and CuO nanotubes were characterized by XRD measurements before removing the AAO membrane. Figure 1 shows XRD patterns collected in the 2-theta range of 20-70° for the samples of both CuS nanowire and CuO nanotube. All the peaks in Figure 1a could be ascribed to hexagonal CuS (cell constants a = 3.796 Å, c = 16.38 Å; JCPDS Card No. 78-0876). The only strong XRD peak in Figure 1a indicates that the CuS nanowires have preferred (110) orientation, and all the peaks in Figure 1b could be readily indexed as monoclinic CuO (cell constants a = 4.6 Å, b = 3.4 Å, c = 5.1 Å; JCPDS Card No. 80-1917).

Bottom Line: 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.

View Article: PubMed Central - HTML - PubMed

Affiliation: 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. jhhe@mail.ipc.ac.cn.

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.

No MeSH data available.