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Adhesion mechanisms of thin polymer films on inorganic oxide surfaces

Record Type:	Electronic resources : Monograph/item
Title/Author:	Adhesion mechanisms of thin polymer films on inorganic oxide surfaces
Author:	Pantelidis, Dimitrios.
Description:	108 p.
Notes:	Adviser: John C. Bravman.
Notes:	Source: Dissertation Abstracts International, Volume: 65-04, Section: B, page: 2047.
Contained By:	Dissertation Abstracts International65-04B.
Subject:	Engineering, Materials Science.
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3128680
ISBN:	0496759426

Adhesion mechanisms of thin polymer films on inorganic oxide surfaces
Pantelidis, Dimitrios.

Adhesion mechanisms of thin polymer films on inorganic oxide surfaces [electronic resource] - 108 p.

Adviser: John C. Bravman.

Thesis (Ph.D.)--Stanford University, 2004.

An alternative approach of interface reinforcement is microstructural modification by introducing controlled roughness or porosity. The success of such engineering strategies depends on the structural properties of the resulting porous surface and control over these properties is particularly important. To that end, we proposed and demonstrated the use of self-assembling template-assisted mesoporous oxide films to generate porous oxide surfaces with excellent control over the structural properties. We further demonstrated that such films are capable of significantly improving the adhesive strength of the model organic/inorganic interface of interest. The combination of mesoporous surface morphology with silane coupling agent chemistry is a very powerful and versatile interface engineering strategy, applicable to a variety of technological and biomedical applications.

ISBN: 0496759426Subjects--Topical Terms:

226940
Engineering, Materials Science.

Adhesion mechanisms of thin polymer films on inorganic oxide surfaces
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500 $a Source: Dissertation Abstracts International, Volume: 65-04, Section: B, page: 2047.
502 $a Thesis (Ph.D.)--Stanford University, 2004.
520 # $a An alternative approach of interface reinforcement is microstructural modification by introducing controlled roughness or porosity. The success of such engineering strategies depends on the structural properties of the resulting porous surface and control over these properties is particularly important. To that end, we proposed and demonstrated the use of self-assembling template-assisted mesoporous oxide films to generate porous oxide surfaces with excellent control over the structural properties. We further demonstrated that such films are capable of significantly improving the adhesive strength of the model organic/inorganic interface of interest. The combination of mesoporous surface morphology with silane coupling agent chemistry is a very powerful and versatile interface engineering strategy, applicable to a variety of technological and biomedical applications.
520 # $a This study focuses on the chemical and microstructural mechanisms that govern the adhesion of a model interface between a low dielectric constant insulating polymer and the native silicon dioxide surface of silicon. Interface adhesion was quantitatively characterized with a fracture mechanics-based method that allows accurate and repeatable measurement of the interface resistance to fracture under mixed-mode loading conditions.
520 # $a We further developed a novel method for characterizing fractional surface coverage via angle-resolved X-ray photoelectron spectroscopy (AR-XPS). Results obtained from this method were found to be in good agreement with results obtained via contact angle experiments. The AR-XPS approach is very powerful and can be used to characterize both surface and buried films with island microstructures.
520 # $a We studied reinforcement of the model interface by chemical modification via silane coupling agents. Specifically, we investigated the effect of two commercially available coupling agent formulations, one with an amine, the other with a vinyl end-group functionality. The vinylsilane was found to be the most effective adhesion promoter. We furthermore discovered that the two materials formed thin films of drastically different morphologies when deposited via spin-coating on oxidized silicon surfaces. The aminosilane exhibited islands and incomplete surface coverage, whereas the vinysilane exhibited smooth morphology. The improved adhesion obtained via the latter was thus interpreted as the combined effect of superior surface wetting and film uniformity on one hand, and chemical affinity with the polymer on the other.
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