In our latest model Nano Vac, the main chamber in which scanning is performed, is designed to withstand low vacuum pressure or injections of other gasses instead of air.
The Q-factor of the cantilever in vacuum increases, thus sensitivity and accuracy of “probe-sample” light forces measurements is gained. At that, the change from atmosphere pressure to 10-2 Torr vacuum provides the following useful effects on AFM imaging :
- Tenfold gain of Q-factor. By further vacuum pumping, Q-factor variations become insignificant and nearly flat variations is observed. The sensitivity gain is especially important for the light forces measuring.
- Vacuum system provides the proper purity of processes it will be definitely be much less dust and particles around and therefore less interference with Nano-scanning
- There is much less water on the sample’s surface and in the probe-sample environment so that capillary forces between the probe and the sample are ignorable. This raises the force measurement accuracy that is useful for all different modes of Nano Pacific AFM.
- Owing to the high vacuum one can carry out investigations in very low temperatures without “hoarfrost” on the sample’s surface.