Private investor, physicist | Trying to understand the world through science, economics and history
A small asperity on a tungsten surface under a high electric field (red means high fields, blue means low fields). Due to the field, the atoms will migrate towards the points with higher fields and the asperity will grow into a nanotip. In a recent paper, accepted for publication in Nanotechnology, we describe a recent … Continue reading How nanotips may grow in electric fields
In a recently published paper, we describe a new parameter set for tungsten 
surfaces that should be able to simulate long-term evolutions of arbitrarily rough tungsten surfaces and nanoscale structures such as e.g. clusters, nanotips or maybe nanowires.
Our paper, describing how the migration of metal surface atoms are affected by applied electric fields, has now become published by Physical Review B. We show that a field gradient may create a biased atom migration towards stronger fields. This effect comes as an applied field will affect the surface charge distribution and in particular … Continue reading How atoms move in electric fields
Ville Jansson, PhD 