Abstract
High-speed atomic force microscopy (AFM) is important for following processes thatoccur on sub-second timescales for studies both in biology and materials science,and also for the ability to examine large areas of a specimen at high resolutionin a practical length of time. Further developments of the previously reportedhigh-speed contact-mode AFM are described. Two instruments are presented:(i) a high-speed flexure stage arrangement capable of imaging at a video rate of30 fps, and (ii) an ultra-high speed instrument using a combined tuning fork andflexure-stage scanning system capable of ultra-high-speed imaging in excess of 1000 fps.Results of imaging collagen fibres under ambient conditions at rates of up to1300 frames s−1 are presented. Despite tip–specimen relative velocities of up to200 mm s−1, no significant damage to the collagen specimen was observed even after tens of thousandsof frames were acquired in the same area of the specimen.
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