Nano Science and Technology Institute
Nanotech 2008 Vol. 1
Nanotech 2008 Vol. 1
Nanotechnology 2008: Materials, Fabrication, Particles, and Characterization - Technical Proceedings of the 2008 NSTI Nanotechnology Conference and Trade Show, Volume 1
 
Chapter 2: Nano Materials & Composites
 

Mechanical properties under nanoindents in gold nanoparticles reinforced poly(vinyl alcohol) nanocomposite films

Authors:P. Tripathy, A. Mishra, S. Ram, H.-J. Fecht
Affilation:Indian Institute of Technology, IN
Pages:308 - 311
Keywords:gold nanoparticles, nanocomposite, mechanical properties, nanoindentaion
Abstract:Free standing films of gold nanoparticles reinforced poly(vinyl alcohol) (PVA) nanocomposite are synthesized by a novel chemical method with selective Au-contents varied from 0.1 to 5.0 wt%. The color change in the Au-PVA nanocomposite films from violet to yellowish color is a characteristic of forming Au-nanocrystals (NCs) of varying sizes and/or morphologies embedded in the PVA molecules. In order to study the mechanical reliability of these films, the mechanical properties such as elastic modulus (E-modulus), hardness (H) and yield stress are studied using nanoindentaion technique. Both E-modulus and H show a decreasing trend followed by an increased value with the increase in the Au-content in the samples. The H-value of the films decreases first from 0.29 GPa in virgin PVA to 0.23 GPa in 0.5 wt% to value of 0.31 GPa in 2 wt% Au-PVA film. Also the E-modulus decreases from 8.19 GPa in PVA film to 6.48 GPa in 0.5 wt% Au-PVA film followed by an increase in the value upto 7.3 GPa in 2 wt% Au-PVA film. In this present paper, these results are analyzed in correlation with the microstructure and are found useful for device applications.
Mechanical properties under nanoindents in gold nanoparticles reinforced poly(vinyl alcohol) nanocomposite filmsView PDF of paper
ISBN:978-1-4200-8503-7
Pages:1,118
Hardcopy:$159.95
 
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