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SEM images of the particles used for adhesion measurements and their finer surface features used in the study (a–g). The insets provide a visual reference of particle type (refer to part (a)). (h) An example of the typical resulting orientation of pollens (pollen (d)—snowflake (E. leucocephala) in this case) on AFM cantilevers. Only pollens exhibiting similar orientations were used for adhesional measurements. (Online version in colour.)
