Nanotechnology-Enabled Sensors

462 Chapter 7: Organic Nanotechnology Enabled Sensors
Fig. 7.71 (A) A Schematic drawing of the measured sample, with DNA molecules
combed between carbon-covered electrodes on a mica substrate. (B) An AFM image
showing the DNA molecules. Reprinted with permission from the Science
Magazine publications. 164
Fig. 7.72 Linear transport measurements on the three samples. DC resistance as a
function of temperature (on a large temperature scale), showing the power law behaviour
down to 1 K. The sample DNA1, with a 30-µm-wide unetched window,
contained approximately 10 combed molecules as estimated from AFM observations;
sample DNA2, with a 120-µm-wide window, had about 40 combed DNAs;
and sample DNA3 had only a few molecules (probably two or three). Reprinted
with permission from the Science Magazine publications. 164