Kim, Sung Wng and Matsuishi, Satoru and Nomura, Takatoshi and Kubota, Yoshiki and Takata, Masaki and Hayashi, Katsuro and Kamiya, Toshio and Hirano, Masahiro and Hosono, Hideo (2007) Metallic state in a lime-alumina compound with nanoporous structure. NANO LETTERS, 7 (5). pp. 1138-1143.
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Official URL: http://pubs.acs.org/doi/abs/10.1021/nl062717b
We report a metallic state in a nanostructured porous crystal 12CaO center dot 7Al(2)O(3) 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 (similar to 2 x 10(21) cm(-3)), which was achieved by a thermal treatment in Ti metal vapor at similar to 1100 degrees 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 similar to 0.1 to 4 cm(2) 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.
|Uncontrolled Keywords:||CRYSTAL 12CAO-CENTER-DOT-7AL(2)O(3); ELECTRONIC CONDUCTOR; INORGANIC ELECTRIDE; CA12AL14O33; DENSITY; ANIONS; OXYGEN; OXIDE; IONS|
|Subjects:||Material Science > Nanostructured materials|
|Deposited On:||11 Sep 2009 12:03|
|Last Modified:||11 Sep 2009 12:03|
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