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Type: EFM

Electrostatic Force Microscopy - PtIr5 coating

Cantilever Data ValueRange*
Resonance Frequency 75 kHz60 - 90
Force Constant 2.8 N/m1.2 - 5.5
Length 225 µm220 - 230
Mean Width 28 µm22.5 - 32.5
Thickness 3.0 µm2.5 - 3.5

Product Description

NanoWorld Pointprobe® EFM probes are designed for electrostatic force microscopy. The force constant and the special coating of the EFM type are optimised for this type of application. This type of probe yields a very high force sensitivity, while simultaneously enabling tapping and lift mode operation.

All SPM and AFM probes of the Pointprobe® series are made from monolithic silicon which is highly doped to dissipate static charge. They are chemically inert and offer a high mechanical Q-factor for high sensitivity. The tip is shaped like a polygon based pyramid with a typical height of 10 - 15 µm.

The tip radius of curvature is less than 25 nm.

A trapezoidal cross section of the cantilever and therefore 30% wider (e.g. NCH) cantilever detector side result in easier and faster laser adjustment. Additionally, because there is simply more space to place and reflect the laser beam, a higher SUM signal is reached.

Coating Description

PtIr5 Coating

The PtIr5 coating consists of a 23 nm thick platinum iridium5 layer deposited on both sides of the cantilever. The tip side coating enhances the conductivity of the tip and allows electrical contacts. The detector side coating enhances the reflectance of the laser beam by a factor of 2 and prevents light from interfering within the cantilever.

The coating process is optimized for stress compensation and wear resistance. Wear at the tip can occur if operating in contact-, friction- or force modulation mode. As the coating is almost stress-free the bending of the cantilever due to stress is less than 2 degrees.

Order Codes and Packages Sizes

 Order Code Quantity Data Sheet
EFM-10 10 yes
EFM-20 20 yes
EFM -50 50 no
EFM -W 380 yes

Product Screencast

Product Screencast on NanoWorld Platinum / Iridium5 (PtIr5) Coated AFM Tips
given by Dr. Marco Becker - Product Developer

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For more information contact:
Pointprobe® is a registered trademark of NanoWorld AG

All data are subject to change without notice.
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