a
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
E-mail: ekwang@ciac.jl.cn
;
Fax: +86 431-85689711
;
Tel: +86431-85262101
b
University of Chinese Academy of Sciences, Beijing, P. R. China
c
College of Physics, Jilin University, Changchun 130022, P. R. China
d
Department of Chemistry and Physics, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, USA