The Influence of Packing Densities and Surface Order on the Frictional Properties of Alkanethiol Self-Assembled Monolayers (SAMs) on Gold:  A Comparison of SAMs Derived from Normal and Spiroalkanedithiols

Langmuir ◽  
2000 ◽  
Vol 16 (5) ◽  
pp. 2220-2224 ◽  
Author(s):  
Seunghwan Lee ◽  
Young-Seok Shon ◽  
Ramon Colorado ◽  
Rebecca L. Guenard ◽  
T. Randall Lee ◽  
...  
Keyword(s):  
Self Assembled Monolayers ◽  
Frictional Properties ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Packing Densities

Odd-Even Effects on Tribology of Self Assembled Monolayers

2011 ◽  
Author(s):  
Leyla Ramin ◽  
Ahmad Jabbarzadeh
Keyword(s):  
Molecular Dynamics ◽  
Friction Coefficient ◽  
Molecular Dynamics Simulations ◽  
Strong Evidence ◽  
Self Assembled Monolayers ◽  
Frictional Properties ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Dynamics Simulations

We have conducted molecular dynamics simulations to study the frictional properties of alkanethiols on Au(111) surfaces, under various loading and shearing conditions. For alkanethiols we find the film responds to increased loading initially by increasing the tilt and then by deformation of individual molecules. We find strong evidence of the friction coefficient being dependent on the number of carbon atoms in the molecule being odd or even. Odd alkanethiols show consistently higher friction coefficient. The structural origin of this odd-even effect observed under various sliding velocities has been discussed.

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