Metallic state in a lime-alumina compound with nanoporous structure

Sung Wng Kim, Satoru Matsuishi, Takatoshi Nomura, Yoshiki Kubota, Masaki Takata, Katsuro Hayashi, Toshio Kamiya, Masahiro Hirano, Hideo Hosono

Research output: Contribution to journalArticle

157 Citations (Scopus)

Abstract

We report a metallic state in a nanostructured porous crystal 12CaO-7Al2O3 by incorporating electrons in the inherent subnanometer-sized cages, in which a three-dimensionally closely packed cage structure acts as an electronic conduction path. High-density electron doping (∼2 x 1021 cm-3), which was achieved by a thermal treatment in Ti metal vapor at ∼1100 °C, induces homogenization of the cage geometry to a symmetric state, resulting in an insulator-metal transition with a sharp enhancement of the electron drift mobility from ∼0.1 to 4 cm2 V-1 s-1. The results provide an approach for the realization of electroactive functions in materials composed only of environmentally benign elements by utilizing the appropriate nanostructures.

Original languageEnglish
Pages (from-to)1138-1143
Number of pages6
JournalNano Letters
Volume7
Issue number5
DOIs
Publication statusPublished - May 1 2007
Externally publishedYes

Fingerprint

Aluminum Oxide
calcium oxides
Lime
Alumina
aluminum oxides
Metal insulator transition
metal vapors
Electrons
homogenizing
Carrier concentration
Nanostructures
electrons
Metals
transition metals
Vapors
Heat treatment
Doping (additives)
insulators
conduction
Crystals

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Kim, S. W., Matsuishi, S., Nomura, T., Kubota, Y., Takata, M., Hayashi, K., ... Hosono, H. (2007). Metallic state in a lime-alumina compound with nanoporous structure. Nano Letters, 7(5), 1138-1143. https://doi.org/10.1021/nl062717b

Metallic state in a lime-alumina compound with nanoporous structure. / Kim, Sung Wng; Matsuishi, Satoru; Nomura, Takatoshi; Kubota, Yoshiki; Takata, Masaki; Hayashi, Katsuro; Kamiya, Toshio; Hirano, Masahiro; Hosono, Hideo.

In: Nano Letters, Vol. 7, No. 5, 01.05.2007, p. 1138-1143.

Research output: Contribution to journalArticle

Kim, SW, Matsuishi, S, Nomura, T, Kubota, Y, Takata, M, Hayashi, K, Kamiya, T, Hirano, M & Hosono, H 2007, 'Metallic state in a lime-alumina compound with nanoporous structure', Nano Letters, vol. 7, no. 5, pp. 1138-1143. https://doi.org/10.1021/nl062717b
Kim SW, Matsuishi S, Nomura T, Kubota Y, Takata M, Hayashi K et al. Metallic state in a lime-alumina compound with nanoporous structure. Nano Letters. 2007 May 1;7(5):1138-1143. https://doi.org/10.1021/nl062717b
Kim, Sung Wng ; Matsuishi, Satoru ; Nomura, Takatoshi ; Kubota, Yoshiki ; Takata, Masaki ; Hayashi, Katsuro ; Kamiya, Toshio ; Hirano, Masahiro ; Hosono, Hideo. / Metallic state in a lime-alumina compound with nanoporous structure. In: Nano Letters. 2007 ; Vol. 7, No. 5. pp. 1138-1143.
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