NANO LETTERS , vol. 3, no. 2, page. 157 - 161, 2003-02
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 124, no. 31, page. 9085 - 9059, 2002-08-07
NANO LETTERS, vol. 2, no. 7, page. 703 - 708, 2002-07