%0 Journal Article
%T Simultaneous current, force and dissipation measurements on the Si(111) 7¡Á7 surface with an optimized qPlus AFM/STM technique
%A Zsolt Majzik
%A Martin Setv¨ªn
%A Andreas Bettac
%A Albrecht Feltz
%J Beilstein Journal of Nanotechnology
%D 2012
%I 
%R 10.3762/bjnano.3.28
%X We present the results of simultaneous scanning-tunneling and frequency-modulated dynamic atomic force microscopy measurements with a qPlus setup. The qPlus sensor is a purely electrical sensor based on a quartz tuning fork. If both the tunneling current and the force signal are to be measured at the tip, a cross-talk of the tunneling current with the force signal can easily occur. The origin and general features of the capacitive cross-talk will be discussed in detail in this contribution. Furthermore, we describe an experimental setup that improves the level of decoupling between the tunneling-current and the deflection signal. The efficiency of this experimental setup is demonstrated through topography and site-specific force/tunneling-spectroscopy measurements on the Si(111) 7¡Á7 surface. The results show an excellent agreement with previously reported data measured by optical interferometric deflection.
%K AFM
%K cross-talk
%K current
%K dissipation
%K force
%K qPlus
%K STM
%K tuning fork
%U http://dx.doi.org/10.3762/bjnano.3.28