5712 SPM用プローブを使用したナノ液体潤滑膜の伸び量と凝着力の測定(S84-1 情報機器コンピュータメカニクス(1),S84 情報機器コンピュータメカニクス)

概要

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The elongation and adhesive force exerted by nano-bridging of lubricants formed between the diamond tip and the disk surface coated with molecularly thin lubricants were measured. These were accomplished by a micro probe of SPM withdrawing from the disk surface. Three different kinds of PFPE lubricants (polar Zdol2000, polar Zdol4000 and nonpolar Z03) were selected with a varying film thickness from monolayer to trilayer (2-9nm). It was clarified that the elongation decreases monotonously with film thickness both for the polar and nonpolar lubricants, and it is longer for the nonploar lubricant. Also, it was found that the adhesive force decreases monotonously for the polar lubricant, while it increases at a 2.5nm thick film for the nonpolar lubricant, and it is stronger for the nonpolar lubricant. These differences were considered to be generated by the lubricant fluidity and the meniscus force.
2006-09-15