Fig. 1
From: Single and bundled carbon nanofibers as ultralightweight and flexible piezoresistive sensors
FESEM images showing the diameter evolution of individual nanofibers of a as-spun PAN nanofiber bundle and nanofiber bundle pyrolyzed at b 500 °C, c 600 °C, d 700 °C, e 800 °C, f 950 °C. g Bar graph demonstrating the overall decrease in nanofiber diameter with error bars depicting standard deviation. Scale bars (a–f) = 500 nm.
