Observation of a Polystyrene Surface Modified by Ultrasonic Scratching Using Atomic Force Microscopy

概要

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Polymeric materials exhibit complicated microwear properties due to their viscoelasticity. Projections are formed on a polymer surface when scratched with the tip of an atomic force microscope. Ultrasonic scratching which can be realized with the combination of an atomic force microscope and a quartz crystal resonator have been applied for a polystyrene surface for modification without projection formation. The polystyrene surface oscillated laterally by the quartz crystal resonator is scan-scratched with a diamond tip for a progressive cutting force. Scratching parallel to the direction of the surface oscillation is the most effective for cutting the polystryrene surface. No projections are observed on the flat carved surface by ultrasonic scratching. With respect to the local elastic properties, although areas scratched without surface oscillation exhibit increased elasticity at the projections, ultrasonically scratched areas exhibit no change in elasticity. Furthermore, on an area previously modified by ultrasonic scratching, projections are not produced by scratching without surface oscillation.
社団法人応用物理学会の論文
1999-06-30