Carbon nano-tubes are self assembled between two electrodes using an electric field for sensor and transistor applications. Also CNT toners re produced for imaging and coating purposes.
Robert H. Detig, Dietmar C. Eberlein, "Electrostatic Printing of Carbon Nano-tube Toners; The Self Assembly Of Virgin Carbon Nanotubes from Non-Aqueous Dispersions" in Proc. IS&T Int'l Conf. on Digital Printing Technologies and Digital Fabrication (NIP23), 2007, pp 874 - 875, https://doi.org/10.2352/ISSN.2169-4451.2007.23.1.art00088_2