ARTICLE IN PRESS
A. Phuruangrat et al. / Journal of Physics and Chemistry of Solids 70 (2009) 955–959
959
4
Fig. 5. PL spectra of BaMeO .
BaMeO
4
with I4
1
/a space group. XRD patterns were also
[6] Z. Luo, H. Li, J. Xia, W. Zhu, J. Guo, B. Zhang, J. Cryst. Growth 300 (2007)
23–529.
5
simulated, and were found to be in accordance with those
obtained from the experiment and JCPDS standard. Raman and
FTIR spectra show that the vibration modes of the products are in
correspondence with those of the molybdate and tungstate
compounds. Their particle sizes, characterized by TEM, are in
[
7] F.M. Pontes, M.A.M.A. Maurera, A.G. Souza, E. Longo, E.R. Leite, R. Magnani,
M.A.C. Machado, P.S. Pizani, J.A. Varela, J. Eur. Ceram. Soc. 23 (2003)
3001–3007.
[
[
8] T. Thongtem, A. Phuruangrat, S. Thongtem, Appl. Surf. Sci. 254 (2008)
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the ranges of 30–75 for BaMoO
PL emissions were respectively detected at 415 and 392 nm for
BaMoO and BaWO , caused by the charge-transition within the
complexes.
4 4
and 20–75 nm for BaWO .
[10] L.S. Cavalcante, J.C. Sczancoski, L.F. Lima Jr., J.W.M. Espinosa, P.S. Pizani,
J.A. Varela, E. Longo, Cryst. Growth Design 9 (2009) 1002–1012.
4
2
4
[
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2001).
ꢀ
[
4
MeO ]
(
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Plenum Press, New York, 1998.
A Practical Approach,
Acknowledgements
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We are extremely grateful to the Thailand Research Fund (TRF),
and NANOTEC, a member of NSTDA, Ministry of Science and
Technology, Thailand for financial support, and the Graduate
School of Chiang Mai University for general funding.
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