Baghbanzadeh, MostafaSimeone, Felice C.Bowers, CarleenLiao, Kung-chingThuo, MartinBaghbanzadeh, MahdiMiller, Michael S.Carmichael, Tricia BreenWhitesides, George2015-06-222014Baghbanzadeh, Mostafa, Felice C. Simeone, Carleen M. Bowers, Kung-Ching Liao, Martin Thuo, Mahdi Baghbanzadeh, Michael S. Miller, Tricia Breen Carmichael, and George M. Whitesides. 2014. “ Odd–Even Effects in Charge Transport Across n -Alkanethiolate-Based SAMs .” Journal of the American Chemical Society 136 (48) (December 3): 16919–16925. doi:10.1021/ja509436k.0002-7863http://nrs.harvard.edu/urn-3:HUL.InstRepos:16654772This paper compares rates of charge transport across self-assembled monolayers (SAMs) of n-alkanethiolates having odd and even numbers of carbon atoms (nodd and neven) using junctions with the structure MTS/SAM//Ga2O3/EGaIn (M = Au or Ag). Measurements of current density, J(V), across SAMs of n-alkanethiolates on AuTS and AgTS demonstrated a statistically significant odd–even effect on AuTS, but not on AgTS, that could be detected using this technique. Statistical analysis showed the values of tunneling current density across SAMs of n-alkanethiolates on AuTS with nodd and neven belonging to two separate sets, and while there is a significant difference between the values of injection current density, J0, for these two series (log|J0Au,even| = 4.0 ± 0.3 and log|J0Au,odd| = 4.5 ± 0.3), the values of tunneling decay constant, β, for nodd and neven alkyl chains are indistinguishable (βAu,even = 0.73 ± 0.02 Å–1, and βAu,odd= 0.74 ± 0.02 Å–1). A comparison of electrical characteristics across junctions of n-alkanethiolate SAMs on gold and silver electrodes yields indistinguishable values of β and J0 and indicates that a change that substantially alters the tilt angle of the alkyl chain (and, therefore, the thickness of the SAM) has no influence on the injection current density across SAMs of n-alkanethiolates.en-USJournal Article2015-06-2210.1021/ja509436k