Rectangular cantilevers of the GP series
have bit different shape than cantilevers of all the other series.
But for the convennience of choice, the GP probes having similar characteristics
(spring constant and resonant frequency) have the same number for
the series: 14, 15, 16, 17 and 18.
Probe of the NSC/CSC Series. The tip is offset from
the cantilever end at about 10 µm
Probe of the GP series. The tip is located at the very end of the
cantilever.
A chip of the GP series has cut corners
to allow imaging using tip inclined with respect to the sample surface.
Application
Rectangular shape is the best in terms of Q-factor, regularity
of the resonant curve, and ease of use. The simplicity of the geometry
allows making some approximate calculations of some important parameters
of the cantilever like torsional and flexural spring constants.
These probes are good for both contact and oscillatory AFM modes.