The self‐sensing add‐on kit enables a user to work with self‐sensing cantilevers on a Keysight 5×00 AFM series. This combines the benefits of a conventional bio AFM with the advantages of a laser free deflection detection using SCL´s selfsensing cantilevers.
The add‐on can be used without changes to the original AFM hardware for imaging in intermittent contact mode. The self‐sensing cantilever add‐on kit consists of a cantilever holder plug‐in module for self‐sensing cantilevers (nose), a pre‐amplifier, a signal splitter box, cables and 10 self‐sensing cantilevers.
The nose contains an adjustable low noise instrumentation amplifier and a fixed reference voltage for the Wheatstone bridge of 2.048V for high sensitivity measurements or 0.5 V for measurements in de‐ionized water.
For driving the cantilever a nose implemented piezo or a heater of a SCL PRSA cantilever can be used (mechanical or thermal excitation). The deflection signal is amplified (adjustable from 1x to 100x) and filtered before it is wired to the lock‐in amplifier of the Keysight AFM MAC‐box.
The hardware is powered via the Keysight break‐out box or an external power supply unit and is connected via the signal splitter box. The whole system is plug‐and‐play able and only the cantilever holder has to be changed for electrical or optical readout.