Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/16079
Title: Solvation Forces and Contact Mechanics at the Nanometer Scale in Molecular Liquids
Authors: NITYA NAND GOSVAMI
Keywords: Atomic force microscopy, continuum mechanics, self-assembled monolayer, solvation forces, scanning tunneling microscopy
Issue Date: 25-Jun-2008
Source: NITYA NAND GOSVAMI (2008-06-25). Solvation Forces and Contact Mechanics at the Nanometer Scale in Molecular Liquids. ScholarBank@NUS Repository.
Abstract: Solvation forces and contact mechanics is studied on a graphite surface using conducting atomic force microscope (C-AFM) in various liquids. The nanoscale contact follows continuum models for the tip interacting with both graphite and an ordered solid-like monolayer of linear alkane (hexadecane) or branched alkane (squalane). The solid-like behavior of the squalane monolayer was confirmed by scanning tunneling microscopy (STM). The squeezing of a disordered monolayer (2,2,4,4,6,8,8-Heptamethylnonane (HMN)) does not follow continuum mechanics models due to the trapping of confined molecules, as indicated in a recent simulation. Solvation forces on a self-assembled monolayer (SAM) surface are also studied to understand the effects of surrounding fluids on measured contact resistance. The results show solvation layering of liquids but solvation does not affect the resistance of the SAM. The resistance does change in different liquids because the mechanical response of the SAM changes depending on the fluid.
URI: http://scholarbank.nus.edu.sg/handle/10635/16079
Appears in Collections:Ph.D Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
HT031424LPhDThesis.pdf9.88 MBAdobe PDF

OPEN

NoneView/Download

Page view(s)

281
checked on Dec 11, 2017

Download(s)

186
checked on Dec 11, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.