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Title page for ETD etd-11272012-171512


Type of Document Dissertation
Author Lewis, James Benjamin
URN etd-11272012-171512
Title Investigation of Frictional Properties in Pure and Mixed Fluorocarbon/Hydrocarbon Monolayers by Molecular Simulations
Degree PhD
Department Chemical Engineering
Advisory Committee
Advisor Name Title
Clare McCabe Committee Chair
G. Kane Jennings Committee Member
Greg Walker Committee Member
Ken A. Debelak Committee Member
Peter T. Cummings Committee Member
Keywords
  • simulation
  • fluorocarbon
  • hydrocarbon
  • monolayer
  • friction
  • molecular dynamics
Date of Defense 2012-08-20
Availability unrestricted
Abstract
Due to small surface area to volume ratios, nanoscale devices can exhibit dominant surface forces that can quickly degrade un-lubricated contacting surfaces. While fluorinated materials have been widely used as lubricants and are more stable than their hydrocarbon counterparts against elevated temperature and humidity, they are known to exhibit higher frictional forces. To overcome this issue, here we study the concept of mixed monolayers composed of both hydrocarbon and fluorocarbon chains. Hydrocarbon-based monolayers have been widely studied and shown to improve frictional properties and device life. To investigate the frictional behavior of mixed fluorocarbon/hydrocarbon monolayers, molecular dynamics simulations of pure hydrogenated and fluorinated chains and mixed fluorinated/hydrogenated chains on silica surfaces and tips have been performed.
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