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Issue 12, 2002
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Effect of composition and structure of gold/copper bimetallic nanoparticles on dispersion in polymer thin films

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Abstract

The effect of composition on the dispersion of AuxCu1 − x bimetallic nanoparticles into a nylon 11 matrix has been investigated. TEM, UV–VIS, EDX, and XPS depth profiling were used for characterizing the changes in the composition of the bimetallic particles and the depth distribution of the particles in the nylon 11 layer caused by annealing in an N2 atmosphere. TEM observation and EDX analysis revealed that island-like bimetallic particles were formed on the nylon 11 surface before annealing, the composition of which was systematically controlled. Upon annealing in an N2 atmosphere, the AuxCu1 − x bimetallic particles with x ≤ 0.55 were not dispersed into the nylon 11 layer while those with x ≥ 0.70 were homogeneously dispersed in the films, indicating the existence of a critical composition for penetration of the bimetallic particles. By comparing the composition and structure of the bimetallic particles, the cause of these finding is discussed in terms of the surface free energy of the particles, which can be varied with their composition by the effect of alloying.

Graphical abstract: Effect of composition and structure of gold/copper bimetallic nanoparticles on dispersion in polymer thin films

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Publication details

The article was received on 16 May 2002, accepted on 02 Sep 2002 and first published on 07 Oct 2002


Article type: Paper
DOI: 10.1039/B207799J
J. Mater. Chem., 2002,12, 3610-3614

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    Effect of composition and structure of gold/copper bimetallic nanoparticles on dispersion in polymer thin films

    K. Akamatsu, T. Kawamura, H. Nabika, S. Deki, T. Strunskus and F. Faupel, J. Mater. Chem., 2002, 12, 3610
    DOI: 10.1039/B207799J

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