Figure 1. Comparison of the tip dimensions of the completed electrode against a human hair and schematic representation of a carbon electrode (inset)

From

An Undergraduate-Level Electrochemical Investigation of Gold Nanoparticles-Modified Physically Small Carbon Electrodes

Shaneel Chandra, Wycliff Tupiti, Sevlin Singh, Zafiar Naaz, Pritika K. Kishor, Archana Goundar, Malina Fakraufon, Surendra Prasad

World Journal of Chemical Education. 2016, 4(5), 93-100 doi:10.12691/wjce-4-5-1