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 Type: EFM |
| Electrostatic Force Microscopy - PtIr5 coating |
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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 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 height of 10-15 µm
The platinum iridium5 (PtIr5) coating on both sides of the probe allows electrical contacts between tip and sample (high conductivity) while enhancing the reflectivity of the cantilever. The typical tip radius of curvature is less than 25 nm. |
| Technical Data | Value | Range* |  |
| Thickness | 3 µm | 2.5 - 3.5 | |
| Mean Width | 28 µm | 22.5 - 32.5 | |
| Length | 225 µm | 220 - 230 | |
| Force Constant | 2.8 N/m | 1.2 - 5.5 | |
| Resonance Frequency | 75 kHz | 60 - 90 | |
| Order Code | Quantity | Data Sheet | |
| EFM-10 | 10 | yes | |
| EFM-20 | 20 | yes | |
| EFM-50 | 50 | no | |
| EFM-W | 380 | yes | |
* Typical values |
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| PtIr5 Coating |
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| PtIr5 coating is an approximately 23 nm thick double layer of chromium and platinum iridium5 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 reflectivity of the laser beam by a factor of 2 and prevents light from interfering within the cantilever. The coating process is optimised for stress compensation and wear resistance. The bending of the cantilever due to stress is less than 2°. Wear at the tip can occur if operating in contact-, friction- or force modulation mode. |
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For more information contact: info@nanoworld.com
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POINTPROBE® is a registered trademark of NANOWORLD AG TappingMode™ is a trademark of Digital Instruments Inc. GelPak® is a registered trademark of Vichem Corporation All data are subject to change without notice. |
NanoWorld AG Rue Jaquet-Droz 1 Case Postale 216 CH-2002 Neuchâtel Switzerland www.nanoworld.com |