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Applied Physics Letters / Volume 87 / Issue 25 / NANOSCALE SCIENCE AND DESIGN

Appl. Phys. Lett. 87, 253108 (2005); http://dx.doi.org/10.1063/1.2147729 (3 pages)

Single-electron tunneling at room temperature in TixSi1−xO2 nanocomposite thin films

D. K. Sarkar1, D. Brassard1, M. A. El Khakani1, and L. Ouellet2

1Institut National de la Recherche Scientifique, INRS-Énergie, Matériaux et Télécommunications, 1650, Boulevard Lionel-Boulet, C.P. 1020, Varennes, Québec, Canada J3X 1S2
2DALSA Semiconductor, 18, Boulevard de l’Aéroport, Bromont, Québec, Canada, J2L 1S7

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(Received 3 June 2005; accepted 23 October 2005; published online 13 December 2005)

Titanium silicate (TixSi1−xO2) nanocomposite thin films containing dispersed TiO2 nanocrystallites have been grown by means of an optimized sol-gel process. The size of the TiO2 nanoprecipitates was varied from ∼ 1 to 22 nm by controlling the content of the TiO2 component of the films. For the Ti0.40Si0.60O2 film composition, which contains TiO2 nanoparticles of ∼ 1 nm diameter, regular oscillations are observed in their conductance-voltage characteristics in the mid-to-high-fields range. This abnormal behavior can be interpreted by single-electron tunneling at room temperature between the TiO2 nanocrystallites separated by the wider band-gap amorphous TixSi1−xO2 phase.

© 2005 American Institute of Physics

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KEYWORDS and PACS

Keywords

titanium compounds, tunnelling, nanocomposites, nanoparticles, crystallites, sol-gel processing, particle size, precipitation, chemical analysis, oscillations, amorphous state

PACS

  • 73.23.Hk

    Coulomb blockade; single-electron tunneling

  • 73.63.Bd

    Nanocrystalline materials

  • 73.40.Gk

    Tunneling

  • 81.07.Bc

    Nanocrystalline materials

  • 77.55.-g

    Dielectric thin films

  • 81.10.Dn

    Growth from solutions

  • 81.10.Fq

    Growth from melts; zone melting and refining

  • 81.15.Lm

    Liquid phase epitaxy; deposition from liquid phases (melts, solutions, and surface layers on liquids)

  • 81.30.Mh

    Solid-phase precipitation

  • 82.80.-d

    Chemical analysis and related physical methods of analysis

  • 61.43.Er

    Other amorphous solids

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2147729

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    D. K. Sarkar, F. Cloutier, and M. A. El Khakani, J. Appl. Phys. 97, 084302 (2005)JAPIAU000097000008084302000001.

    D. K. Sarkar, E. Desbiens, and M. A. El Khakani, Appl. Phys. Lett. 80, 294 (2002)APPLAB000080000002000294000001.

    D. Brassard, D. K. Sarkar, M. A. El Khakani, and L. Ouellet, Appl. Phys. Lett. 84, 2304 (2004)APPLAB000084000013002304000001.

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