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Issue 18, 2014
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Doping of wide-bandgap titanium-dioxide nanotubes: optical, electronic and magnetic properties

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Abstract

Doping semiconductors is an important step for their technological application. While doping bulk semiconductors can be easily achieved, incorporating dopants in semiconductor nanostructures has proven difficult. Here, we report a facile synthesis method for doping titanium-dioxide (TiO2) nanotubes that was enabled by a new electrochemical cell design. A variety of optical, electronic and magnetic dopants were incorporated into the hollow nanotubes, and from detailed studies it is shown that the doping level can be easily tuned from low to heavily-doped semiconductors. Using desired dopants – electronic (p- or n-doped), optical (ultraviolet bandgap to infrared absorption in co-doped nanotubes), and magnetic (from paramagnetic to ferromagnetic) properties can be tailored, and these technologically important nanotubes can be useful for a variety of applications in photovoltaics, display technologies, photocatalysis, and spintronic applications.

Graphical abstract: Doping of wide-bandgap titanium-dioxide nanotubes: optical, electronic and magnetic properties

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Publication details

The article was received on 05 May 2014, accepted on 07 Jul 2014 and first published on 12 Aug 2014


Article type: Paper
DOI: 10.1039/C4NR02417F
Nanoscale, 2014,6, 10839-10849

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    Doping of wide-bandgap titanium-dioxide nanotubes: optical, electronic and magnetic properties

    Y. Alivov, V. Singh, Y. Ding, L. J. Cerkovnik and P. Nagpal, Nanoscale, 2014, 6, 10839
    DOI: 10.1039/C4NR02417F

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