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. 2021 Nov 13;414(2):1029–1038. doi: 10.1007/s00216-021-03765-y

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© The Author(s) 2021

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Fig. 2 — TM-AFM images of APAC drop-casted on mica from a buffer solution containing 20 mM MgCl₂. The dilution of the APAC stock solution was a 1:1000 and b 1:20,000. c Three-dimensional image of feature marked with the red box in a