Pires E1, Macdonald JE, Elliott M.
Nanoscale. 2013 Oct 7;5(19):9397-403. doi: 10.1039/c3nr03682k. Epub 2013 Aug 20.We report scanning tunnelling microscope (STM) measurements of the single molecule conductance of α,ω-alkanedithiols for a large range of molecular chain lengths (N = 3-10) and temperatures (180-390 K) under ultra high vacuum. Two STM-based measurement techniques were employed on molecules trapped between tip and substrate: (i) the well established current-distance or I(z) technique and (ii) a new I(V,z) technique in which the current-voltage characteristics are determined as the tip-substrate distance z is varied. Read More