NANOSENSORS™ Uniqprobes®: Partially Coated Cantilever for Advances in Life Science AFM

Often it is necessary to add a coating to an AFM cantilever. In most cases it is a reflex coating on the backside of the cantilever to enhance the reflection of the laser to get a sufficient signal into the AFM photodetector.

Cantilever with partial coatings, varying from 20 to 100%.
NANOSENSORS™ cantilever with a reflex coating covering about 20, 40, 65 and 100% of the cantilever.

Unfortunately, adding a coating to a cantilever has several drawbacks such as:

  • a coating adds stress to the cantilever
  • when the cantilever is illuminated with the laser the so called Bimorph-Effect (if operating in liquids) will bend the cantilever and let the laser drift out of the photo-detector (thermal drift)
  • a higher damping of the cantilever which leads to a lower Q-factor
  • a higher noise of the cantilever

Those effects can be reduced dramatically when the coating is not done on the whole cantilever, but only on a part of it. The images above are showing cantilevers with a reflex coating covering about 20, 40, 65 and 100% of the cantilever.

To provide best quality with highest possible cantilever sensitivity NANOSENSORS™ manufactures their Uniqprobe® cantilever as the only AFM tip exclusively with a partial coating!

To learn more, please have a look at

the NANOSENSORS™ Uniqprobe® brochure