[1] Anders R P, Bein T, Dorogi M, Feng S, Henderson J I,
Kubiak C P, Mahoney W, Osifchin R G and Reifenberger R 1996
Science 272 1323

[2] Chen J, Reed M A, Rawlett A M and Tour J M 1999
Science 286 1550

[3] Guisinger N P, Basu R, Baluch A S and Hersam M C 2004
Nanotechnology 15 452

[4] Gittins D I, Bethell D, Schiffrin D J and Nichols R J
2000 Nature 408 67

[5] Donhauser Z J, Mantooth B A, Kelly K F, Bumm L A, Tour J
M and Weiss P S 2001 Science 292 2303

[6] Chen J and Reed M A 2002 Chem. Phys. 281 127

[7] Park J, Pasupathy A N, Goldsmith J I, Chang C, Yaish Y,
Petta J R, Rinkoski M, Sethna J P, Abruna H D, McEuen P L and Ralph
D C 2002 Nature 417 722

[8] Wang C K and Luo Y 2001 Phys. Chem. Chem. Phys.
3 5017

[9] Luo Y, Wang C K and Fu Y 2002 J. Chem. Phys.
117 10283

[10] Wang C K, Fu Y and Luo Y 2003 J. Chem. Phys.
119 4923

[11] Ke S H, Baranger H U, Yang W T 2005 J. Chem. Phys.
122 074704

[12] Ke S H, Baranger H U, Yang W T 2004 J. Am. Chem.
Soc. 126 15897

[13] Bai P , Li P E, Chong C C and Chen Z H 2006 Curr.
Appl. Phys. 6 531

[14] Dorogi M, Gomez J, Osifchin R and Anders R P 1995
Phys. Rev. B 52 9071

[15] Bratkovsky A M and Kornilovitch P E 2003 Phys. Rev.
B 67 115307

[16] Moresco F, Gross L, Alemani M, Rieder K H and Tang H 2003
Phys. Rev. Lett. 91 036601

[17] Hu Y H, Zhu Y, Cao H J and Guo H 2005 Phys. Rev.
Lett. 95 156803

[18] Brandbyge M, Mozos J L, Taylor J and Stokbro K 2002
Phys. Rev. B 64 115411

[19] Kergueris C, Bourgoin J P, Palacin S, Magoga M and
Joachim C 1999 Phys. Rev. B 59 12505

[20] Reichert J, Ochs R, Beckmann D, Weber H B and Mayor M
2002 Phys. Rev. Lett. 88 176804

[21] Smit R H M, Noat Y, Untied C, Lang N D and Ruitenbeek J
M 2002 Nature 419 906

[22] Damle P S, Ghosh A W and Datta S 2001 Phys. Rev. B
64 201403

[25] Joachim C, Gimzewski J K and Aviram A 2000 Nature
408 541