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Paper
Phys. Chem. Chem. Phys., 2007, 9, 878 - 883, DOI: 10.1039/b616795k
Cu/ZnO and Cu/ZrO2 interactions studied by contact angle measurement with TEM
Igor Kasatkin, Benjamin Kniep and Thorsten Ressler
A technique of contact angle measurement was applied to the nano-scale oxide-supported metal particles. For Cu supported on ZnO and ZrO2 the angles were found to increase and the work of adhesion to decrease with increasing particle size. Such a trend is interpreted as an effect of negative contact line tension of 2.1 × 10–9 J m–1 and 1.0 × 10–9 J m–1 in the Cu/ZnO and Cu/ZrO2 system, correspondingly. For the small-sized Cu particles the apparent work of adhesion on ZnO support is higher than that on ZrO2.
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