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(a) Experimental model diagram, signal processing flow, and spring-mass model. (i) to (vi) represent dynamic mechanical phenotypes of cells. (b) AFM schematic diagram. (c) AFM tip made of pyramid tip etched by focused ion beam (FIB). (d) Improved AFM probe which contains three parts: micromagnetic bead, needle tip, and cantilever. (Adapted by kind permission from [144]).
