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Nanostructured Ultrathin Films of Silicate Clay and Polyelectrolytes: Deposition Parameters and Mechanical Properties by Nanoindentation

Published online by Cambridge University Press:  17 March 2011

Xiaowu Fan  and
Rigoberto C. Advincula
Xiaowu Fan
Affiliation:
Department of Chemistry, University of Alabama at Birmingham 901 14th Street South, Birmingham, AL 35294, U.S.A.
Rigoberto C. Advincula
Affiliation:
Department of Chemistry, University of Alabama at Birmingham 901 14th Street South, Birmingham, AL 35294, U.S.A.
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Abstract

Recently, we have investigated the electrostatic layer-by-layer (ELBL) deposition of polycation and clay platelet ultrathin films. We have investigated the properties of these films using techniques such as ellipsometry, X-ray diffraction and atomic force microscopy (AFM). In this work, we report our results regarding the formation of this type of hybrid ultrathin films focusing on their mechanical properties as probed by nanoindentation experiments. Structural information such as film thickness, platelet coverage, surface morphology, roughness, etc., is important parameters for their potential use as coatings. We have investigated the relationship of several of these parameters with their mechanical hardness and modulus properties as a function of indentor probe depth in nanoindentation experiments. The ultrathin films have remarkable mechanical properties very different from most polymer ultrathin films.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 697: Symposium P – Surface Engineering 2001--Fundamentals and Applications , January 2001 , P8.16
Copyright
Copyright © Materials Research Society 2002

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