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Force microscope cantilever for nanoscale magnetic resonance imaging. (a) Ultrasensitive cantilever (scale bar = 200 µm); (b) magnified view of the cantilever showing a reflective pad for interferometric detection of cantilever motion (upper) and a narrowed leading edge (lower) to minimize cantilever-sample interactions (scale bar = 30 µm); and (c) sketch of a ~100 nm wide magnetic nanorod tip overhanging the cantilever’s leading edge.
