Figure 1: Schematic diagram of chemical reactions far from equilibrium in a droplet open-reactor system controlled by pulse-density modulation.

a, Schematic diagram of the nanotube device, comprising a single-wall carbon nanotube grown by chemical vapour deposition on a SiO 2 substrate and contacted by Cr/Au source and drain electrodes ...

QElectroTech is an open source tool for drawing these types of diagrams. It consists of two tools: an element editor for creating schematic symbols and a diagram editor for creating your drawings.