2522 カンティレバーの過渡振動を用いた分子液架橋のダイナミクス : 動的凝着力の導入(S79-1 情報機器コンピュータメカニクス(1),S79 情報機器コンピュータメカニクス)

概要

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The lubricant thickness and retractive velocity dependency of the adhesion force between the diamond tip and the disk surface were measured while the tip was withdrawn from the disk surface with PFPE lubricant film. The dynamic adhesion force model was also adopted to analyze the transient vibration of the cantilever after the tip was separated from the disk surface. This method clearly visualized the non-linear phenomena occurred at the initial separation, the rupture of the liquid bridge, and also the minute fluctuation in the inclination of the adhesion decreasing profile. The PFPE lubricant having functional end groups (Zdol2000) with the thicknesses of 29nm and 63nm and the retractive velocities of 29, 57, 111, 219μm/s were employed to measure the lubricant thickness and velocity dependencies. The contact force which occurred at the separation between the diamond tip and the disk surface was maximum value in the adhesion profile and largely attributable to the lubricant thickness and slightly to the retractive velocity.
2005-09-18