Friction of C60 Molecules at Noble Metal Surfaces Detected by Change in DC Resistivity

概要

論文の詳細を見る
To test the applicability of the friction model to the vibrational damping of adsorbed molecules via the excitation of electron–hole pairs, the change in DC resistivity induced by C60 adsorption onto polycrystalline noble metal films (Au, Cu, and Ag) was measured. The friction coefficients were found to be $1.1\times 10^{10}$, $1.7\times 10^{10}$, and $2.8\times 10^{10}$ s-1 for C60/Au, C60/Ag, and C60/Cu systems, respectively. The obtained friction coefficients increase in the order Au, Ag, and Cu; the order correlates with the charge transfer effect across C60/noble metal interfaces. The values deduced from the resistivity data were ten times higher than that predicted by the friction model, indicating that the friction model is not appropriate for obtaining accurate estimations in cases of the adsorption of rather heavy molecules such as C60.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2005-02-15