Contact Resonance on PP/PS Blend
A 4.5μm x 9μm contact resonance image of the cryotomed surface of an 80/20 polypropylene/polystyrene blend. The calculated Quality factor painted on the rendered topography is shown in (a) and contact resonance f0 on topography is shown in (b). The PP and PS regions display less contrast in f0 consistent with a small difference in their bulk storage moduli, while the higher contrast in Q between PP and PS is consistent with a large difference in their bulk loss moduli. Adapted from Gannepalli et al. Nanotechnology 22 355705 (2011).