@unpublished{TUW-261701, author = {Kohl, Dominik and Mesquida, Patrick and Schitter, Georg}, title = {Multi-frequency Kelvin Probe Force Microscopy Method for Charge Mapping Without DC-Bias}, year = {2017}, note = {Posterpr{\"a}sentation: Nano and Photonics {\&} FemtoMat, Mauterndorf; 2017-03-20 -- 2017-03-25} }