Equality of diffusion-limited chronoamperometric currents to equal area   spherical and cubic nanoparticles on a supporting electrode surface
  We computationally investigate the chronoamperometric current response of spherical and cubic particles on a supporting insulating surface. By using the method of finite differences and random walk simulations, we can show that both systems exhibit identical responses on all time scales if their exposed surface areas are equal. This result enables a simple and computationally effcient method to treat certain spherical geometries in random walk based noise investigations. 
Enno K\"atelh\"on, Edward O. Barnes, Kay J. Krause, Bernhard Wolfrum,   Richard G. Compton
physics.chem-ph