Nanoscale Surface Mechanical Property Measurements: Force Modulation Techniques Applied to Nanoindentation (Preprint)
NAVAL RESEARCH LAB WASHINGTON DC SURFACE CHEMISTRY BRANCH
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Mechanical properties of surfaces and interfaces are important for understanding the behavior of adhesive and sliding contacts, where changes in interfacial properties can result from surface treatments, sliding processes, or contaminants. Recent advances combining nanoindentation, atomic force microscopy and force modulation techniques enable examination of surface mechanical properties with substantially improved force and spatial resolution, and enable quantitative, dynamic measurements of surface mechanical properties of nanoscale contacts. We present examples demonstrating quantitative, surface sensitive nanomechanics of thin films and compliant polymers, damping losses and the effects of water vapor. Additionally, we present a new, quantitative stiffness imaging technique for mechanical properties mapping at the nanoscale.
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