Extraction of Experimental ZERO-Q Evaporation Field Values

Summary form only given. Field evaporation (FEV) is the ion emission process in two important tools of nanotechnology, the focused ion beam (FIB) machine and the atom-probe field-ion microscope. Basic FEV theory is well established, but finer details are not. An important parameter is the field F^E at which FEV activation energy becomes zero. F^E cannot be measured directly, but must be extracted from experimental data using a model. Reliable estimates exist only for three elements, W, Mo and Rh. Raw data exist for seven other elements, but it can be argued that the methods of analysis previously used are incorrect. This data has been re-analysed using the author´s FEV model. In V/nm the F^E-values derived are: Al=37.7, Fe=63.4, Ni=54.7, Cu=52.5, Pd=52.5, Ag=41.7, Ir=66.7. These values are systematically higher than best theoretical estimates, by about 40%