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Structural Evolution and Mechanical Behavior of Bio-inspired Oxide Films on Self-Assembled Organic Layers

Published online by Cambridge University Press:  26 February 2011

Guangneng Zhang  and
Junghyun Cho
Guangneng Zhang
Affiliation:
andyzhang@binghamton.edu, SUNY at Binghamton, Mechanical Engineering, Vestal Pkwy East, Binghamton, NY, 13902-6000, United States
Junghyun Cho
Affiliation:
jcho@binghamton.edu, SUNY at Binghamton, Mechanical Engineering, Vestal Pkwy East, Binghamton, NY, 13902-6000, United States
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Abstract

A bio-inspired approach is employed to deposit the oxide films on the substrates coated with self-assembled organic layers. Particularly, titania and zirconia films are grown in aqueous precursor solutions at near room temperatures. This process, directed by the nanoscale organic template, mimics the controlled nucleation and growth of the biominerals such as bones and teeth. Multiscale structural evolution resulting from initial bulk nucleation, nanoparticle aggregation, and ultimate film formation are systematically studied by adjusting the precursor solution conditions. Dynamic light scattering (DLS) is utilized to characterize initial nanoparticles and their associated aggregates/clusters formed in situ in solution. Corresponding nano- and microstructure developments of the oxide films are investigated through high-resolution transmission electron microscope (TEM) and scanning electron microscope (SEM). In addition, mechanical performance is evaluated with the aid of a dynamic nanoindentation testing to establish the structure-property relationships of the bio-inspired oxide films. The goal of this study is to have a capability to tailor microstructures and mechanical behaviors by identifying the controlling mechanisms responsible for nucleation and growth of such oxide films.

Keywords

biomimetic (assembly)thin filmnanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 975: Symposium DD – Mechanics of Biological and Bio-Inspired Materials , 2006 , 0975-DD10-02
Copyright
Copyright © Materials Research Society 2007

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References

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