Journal
PHYSICAL REVIEW LETTERS
Volume 86, Issue 19, Pages 4338-4341Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.86.4338
Keywords
-
Categories
Ask authors/readers for more resources
dynamics of oligomer desorption from surfaces has been studied by measuring the desorption kinetics of a set of straight chain alkanes [H(CH2)(n)H, with n = 5 to 60] from the surface of single crystalline graphite. Desorption is observed to be a first-order process and the preexponent of the desorption rate constant has a value upsilon = 10(19.6 +/-0.5) sec(-1) and is independent of the oligomer chain length. More interestingly, we find that the barrier to desorption has a nonlinear dependence on chain length and takes the form DeltaE(des)(double dagger) = A + Bn-alpha, with the exponent alpha = 0.50 +/- 0.01.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available