Supplementary Art:
Conductance Switching in Single Molecules through Conformation Changes

Z. J. Donhauser,1 B. A. Mantooth,1 K. F. Kelly,1 L. A. Bumm,1 J. D. Monnell,1 J. J. Stapleton,1 D. W. Price Jr.,2 D. L. Allara,1 J. M. Tour,2 and P. S. Weiss1

1Department of Chemistry, The Pennsylvania State University, University Park, PA 16802-6300, USA

2Department of Chemistry and Center for Nanoscale Science and Technology, Rice University, Houston, TX 77005, USA




(1.8 MB)
Perspective views of a single molecule in the ON and OFF states. The molecular lattice of the insertion matrix is visible around the molecule.
[Imaging conditions: 95 Å x 95 Å; 1.0 pA; Vtip=+1.0 V; Frame interval: 30 min]
(0.9 MB)
Perspective views of several molecules inserted into a dodecanethiolate monolayer. The lower image reveals that several of the molecules have switched OFF.
[Imaging conditions: 470 Å x 470 Å; 1.0 pA; Vtip=-1.5 V; Frame interval: 13 hr 20 min]
(0.9 MB)
Same views as the previous image, this time the molecules that have switched off are highlighted with the yellow arrows.
(85 KB)
Several images from a series of 200 that monitors the behavior of a pair of molecules inserted into a dodecanethiolate monolayer. They can be seen to switch reversibly between the ON and OFF states. Frame numbers are given in the lower right of each image.
[Imaging conditions: 1000 Å x 1000 Å; 0.1 pA; Vtip=-1.0 V]
(84 KB)
Same images as the previous. Total time is given in the lower right of each image in hours and minutes.
(83 KB)
Same images; time is given as hours, minutes and seconds.
(1.7 MB)
(1.7 MB)
(1.7 MB)
Perspective views of a single molecule inserted into a dodecanethiolate monolayer. The top image in each pair shows the molecule in the ON state and the bottom image shows the molecule in the OFF state.
[Imaging conditions: 95 Å x 95 Å; 1.0 pA; Vtip=+1.0 V; Frame interval: 30 min]

(0.8 MB)
Perspective view of several molecules inserted into a dodecanethiolate monolayer. Several substrate step edges and monolayer defect sites are visible.
[Imaging conditions: 470 Å x 470 Å; 1.0 pA; Vtip=-1.5 V]
(0.8 MB)
Perspective view of the same area. Several molecules have switched into the OFF state in this image.
[Imaging conditions: 470 Å x 470 Å; 1.0 pA; Vtip=-1.5 V]
(0.6 MB)
Perspective view of several molecules inserted into a dodecanethiolate film. The molecules are distributed over several substrate steps.
[Imaging conditions: 1000 Å x 1000 Å; 1.0 pA; Vtip=-1.5 V]

(0.2 MB)
Single molecule in the OFF state, surrounded by the dodecanethiolate monolayer matrix.
[Imaging conditions: 95 Å x 95 Å; 1.0 pA; Vtip=+1.0 V]

(0.2 MB)
Single molecule in the ON state, surrounded by the dodecanethiolate monolayer matrix.
[Imaging conditions: 95 Å x 95 Å; 1.0 pA; Vtip=+1.0 V]

Funding for this research was provided by:
The Army Research Office
The Defense Advanced Research Projects Agency
The National Science Foundation
The Office of Naval Research
Zyvex LLC

Supplemental Data | Supplemental Material Home | Weiss Group Home
Last updated: May 21, 2001 zjd
For further inquires contact Paul Weiss
For problems with this page contact the webmaster