Evaluation of different conductive nanostructured particles as filler in smart piezoresistive composites

Table 1 Figures of merit of the nanoshaped-spiky fillers

Metal particles	R_tip^a[nm]	H_tip/FWHM^b	H_tip/D_core^c	Filler: PDMS weight ratio
Ni	43	1.1	0.09	3.1
Cu	975	3.6	0.37	2:1
Au	17	2.3	0.34	1:1

^aAverage tip radius; ^baspect ratio between the H_tip and FWHM); ^cratio between the H_tip and the D_core.