HomeSPM-ControllerQuantum TransportPLLApplicationsReferencesCompany  

Kelvin Probe Controller

Bias voltage regulation for contact potential measurements

The Kelvin Probe module is an add-on module to either the OC4.5-Station or the full Nanonis Control System (with OC4) and is intended for the mapping of surface charge distribution or contact potential difference (CPD) between a tip and sample. Its fully digital implementation allows for maximum flexibility. Any channel can, for instance, be selected as input signal for either amplitude or frequency shift modulation modes. An internal lock-in demodulates the input signal and a PI loop regulates the bias voltage to compensate for the change in contact potential. The modulating AC-component of the bias voltage, defined by the user, is internally added to the regulated DC bias voltage.

  • All signal are internal with a single output for the bias 
  • AM- and FM- Kelvin Probe modes possible
  • Internal lock-in: modulates bias voltage and demodulates the amplitude of the frequency shift
  • Digital PI-controller: regulate bias voltage to minimize electrostatic interaction


Back  |   Print Page

nanonis   News & Events
Nanonis SO5/TSO 16-channel signal source released

The SO5 and TSO are 16-channel precision, low-noise analog output add on modules for the Nanonis SPM Control System and the Nanonis Tramea quantum transport measurement system. Nanonis Tramea users can profit from up to 48 temperature-stabilized 20-bit signal sources able to control even the most complex nanostructures. More information about the new instrument can be found here

New application note library online

Announcing our two new application notes galleries to highlight results from our SPM control system as well as the new Nanonis Tramea QTMS.

More »

All News »

nanonis   Address
        SPECS Zurich GmbH
        Technoparkstrasse 1
        8005 Zurich

        Tel.:    +41-44 445 18 25
        Fax:    +41-44 445 18 26

        Privacy Policy

© 2020 by Nanonis Powered by MySign