Tetrapods have the unique property of self-aligning on a flat surface with one arm pointing in the direction perpendicular to the surface plane. The positioning of single tetrapods on the flattened tip of commercial AFM probes (see image) is reported. These tetrapod-functionalized AFM probes are used to image the topography of different samples revealing excellent spatial and vertical resolution.
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Nobile et al. (2008) studied this question.
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