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Volumn 301, Issue 5633, 2003, Pages 626-629

High-density electron anions in a nanoporous single crystal: [Ca24Al28O64]4+ (4e-)

Author keywords

[No Author keywords available]

Indexed keywords

CRYSTALLOGRAPHY; ELECTRONS; IONIC CONDUCTION; NANOSTRUCTURED MATERIALS; NEGATIVE IONS; OXYGEN;

EID: 0042991492     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1083842     Document Type: Article
Times cited : (794)

References (28)
  • 13
    • 0042398699 scopus 로고    scopus 로고
    • note
    • We used C12A7 single crystals grown by the floating zone method (18) as starting material. These were sliced into 0.4-mm-thick plates and polished.
  • 14
    • 0042398700 scopus 로고    scopus 로고
    • note
    • After the Ca treatment, the inner surface of the glass tubes resembled a mirror, owing to the formation of a metal calcium layer on the glass wall. However, the surfaces of the C12A7 crystals remained transparent.
  • 15
    • 0041396510 scopus 로고    scopus 로고
    • note
    • 2O in air.
  • 16
    • 0041396509 scopus 로고    scopus 로고
    • note
    • 2- ions is controlled by surface reactions between a C12A7 crystal and the metallic Ca layer formed.
  • 19
    • 0041897471 scopus 로고    scopus 로고
    • note
    • -3) that gives an absorption band peaking at 5 eV. Thus, the apparent absorption edge is shifted to ∼4 eV.
  • 20
    • 0042398698 scopus 로고    scopus 로고
    • note
    • According to a quantum-chemical calculation based on the embedded cluster model for UV-illuminated C12A7:H (21), an electron trapped in the cage is localized in the cage at the ground state, and the 0.4 and 2.8-eV bands are due to the electronic transition to an adjacent cage and s→p excitation within the cage, respectively. This result also provides a model in which the transfer of the clathrated electron is controlled by polaron associated with the 0.4-eV optical absorption band.
  • 22
    • 0042899607 scopus 로고    scopus 로고
    • note
    • In the polaron model, the barrier height for thermal hopping to a nearest site is about four times as large as that for hopping by optical excitation. The latter is calculated to be 0.4 eV (21), and the thermal barrier height is predicted to be ∼0.16 eV.
  • 25
    • 0042398696 scopus 로고    scopus 로고
    • note
    • Fachinformationszentrum Karlsruhe and the National Institute of Standards and Technology (FIZ/NIST), Inorganic Crystal Structure Database (ICSD) 6287.
  • 28
    • 0042398697 scopus 로고    scopus 로고
    • note
    • 2O was used as a spin standard reference.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.