Fig. 1: Schematics of the experimental set-ups. | Nature Communications

Fig. 1: Schematics of the experimental set-ups.

From: Electrification at water–hydrophobe interfaces

Fig. 1

a Droplets formed at the tip of a water-filled capillary (hydrophobic or hydrophilic) inside a parallel plate capacitor. b Droplets formed at the tip of an air-filled capillary. c Direct measurement of electrical charges carried by water droplets using a Faraday cup (comprising aluminum sheet) connected to an electrometer. The inset demonstrates the circuit of the electrometer, where C, V0, and A refer to the capacitance, the voltage across the capacitor, and a low current input amplifier, respectively76.

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