Detail publikace

FREE-STANDING WO3 NANOTUBE ARRAY ELECTRODES VIA THE POROUS-ALUMINA-ASSISTED ANODIZING OF W/TI LAYERS

MOZALEV, A. BENDOVÁ, M. PYTLÍČEK, Z. HASSEL, A. W.

Originální název

FREE-STANDING WO3 NANOTUBE ARRAY ELECTRODES VIA THE POROUS-ALUMINA-ASSISTED ANODIZING OF W/TI LAYERS

Anglický název

FREE-STANDING WO3 NANOTUBE ARRAY ELECTRODES VIA THE POROUS-ALUMINA-ASSISTED ANODIZING OF W/TI LAYERS

Jazyk

en

Originální abstrakt

Nanostructured tungsten oxide (TO) exhibits excellent electrochromic, photochromic and gas sensing properties. However, the well-controlled fabrication of stable TO nanofilms remains a challenge. Here we describe an electrochemical approach to synthesize a self-organized array of long aspect ratio TO nanocap-sules, which then can be top-opened and transformed to vertically-aligned, spatial-ly-ordered TO nanotubes. The amorphous array of TO nanocapsules is formed via the initial growth of a nanoporous alumina film, followed by the pore-directed ano-dizing of a W/Ti underlayer. The capsules/tubes may have the diameter of 30-150 nm, the length of up to 800 nm, and the population density of 109 cm-2. A model of porous-alumina-assisted growth of the TO nanotube array is discussed. Electri-cal/dielectric characterization of the TO nanotubes revealed the potential for apply-ing the films as electrodes for photoelectrochemical hydrogen generation, as active layers of gas sensors, micro-diodes and parts of electronic circuits where the well-defined nano-channels for carriers may bring greater advantages.

Anglický abstrakt

Nanostructured tungsten oxide (TO) exhibits excellent electrochromic, photochromic and gas sensing properties. However, the well-controlled fabrication of stable TO nanofilms remains a challenge. Here we describe an electrochemical approach to synthesize a self-organized array of long aspect ratio TO nanocap-sules, which then can be top-opened and transformed to vertically-aligned, spatial-ly-ordered TO nanotubes. The amorphous array of TO nanocapsules is formed via the initial growth of a nanoporous alumina film, followed by the pore-directed ano-dizing of a W/Ti underlayer. The capsules/tubes may have the diameter of 30-150 nm, the length of up to 800 nm, and the population density of 109 cm-2. A model of porous-alumina-assisted growth of the TO nanotube array is discussed. Electri-cal/dielectric characterization of the TO nanotubes revealed the potential for apply-ing the films as electrodes for photoelectrochemical hydrogen generation, as active layers of gas sensors, micro-diodes and parts of electronic circuits where the well-defined nano-channels for carriers may bring greater advantages.

Dokumenty

BibTex


@inproceedings{BUT118396,
  author="Zdeněk {Pytlíček} and Alexander {Mozalev} and Mária {Bendová} and Achim Walter {Hassel}",
  title="FREE-STANDING WO3 NANOTUBE ARRAY ELECTRODES VIA THE POROUS-ALUMINA-ASSISTED ANODIZING OF W/TI LAYERS",
  annote="Nanostructured tungsten oxide (TO) exhibits excellent electrochromic, photochromic and gas sensing properties. However, the well-controlled fabrication of stable TO nanofilms remains a challenge. Here we describe an electrochemical approach to synthesize a self-organized array of long aspect ratio TO nanocap-sules, which then can be top-opened and transformed to vertically-aligned, spatial-ly-ordered TO nanotubes. The amorphous array of TO nanocapsules is formed via the initial growth of a nanoporous alumina film, followed by the pore-directed ano-dizing of a W/Ti underlayer. The capsules/tubes may have the diameter of 30-150 nm, the length of up to 800 nm, and the population density of 109 cm-2. A model of porous-alumina-assisted growth of the TO nanotube array is discussed. Electri-cal/dielectric characterization of the TO nanotubes revealed the potential for apply-ing the films as electrodes for photoelectrochemical hydrogen generation, as active layers of gas sensors, micro-diodes and parts of electronic circuits where the well-defined nano-channels for carriers may bring greater advantages.",
  booktitle="Proceedings of the 3rd International Conference on ADVANCES IN ELECTRONIC AND
PHOTONIC TECHNOLOGIES (ADEPT2015)",
  chapter="118396",
  howpublished="print",
  year="2015",
  month="june",
  pages="15--18",
  type="conference paper"
}