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(a) Schematic of Ar+ ion beam irradiation with different incident angles; (b) the angles of curved micropillars according to the incident angles of ion beam irradiation; (c) initial resistances of the curved micropillar structured MWCNT/PDMS films according to the incident angles of ion beam irradiation; (d) FESEM images of the micropillars according to the incident angles of ion beam irradiation at 0°, 30°, 60° and 80° in side view (upper images) and top view (bottom images).
