We investigate the breakup of liquid jets by use of familiar one-dimensional equations derived by Egger. As the dimension of jet becomes smaller, thermal fluctuation effects become more significant. The thermal fluctuation effects can be modeled by stochastic lubrication equations and we investigate the breakup of nanojets by these equations developed by Moseler. We have derived model equations for charged capillary jets by transforming the shape of jet and finally the model equations of charged nanojets. When an electric field exists, we have found that the breakup time and the breakup length are shorter and electric effects make nanojets more unstable.
