High Aspect Ratio (> 5:1) - Non-Contact/Tapping Mode - Long Cantilever - Reflex Coating

NANOSENSORS™ AR5-NCLR AFM tips are designed for non-contact or tapping mode AFM. The NCL probe is designed for SPM systems requiring a minimum cantilever length > 125 µm or a resonance frequency of less than 400 kHz. Compared to the high frequency non-contact type NCH the maximum scanning speed is slightly reduced. This cantilever type combines high operation stability with outstanding sensitivity and fast scanning ability.

For measurements on samples with sidewall angles approaching 90° NANOSENSORS™ produces specially tailored tips. These tips are FIB (Focused Ion Beam) milled to achieve a high aspect ratio portion better than 5:1 at the end of the common silicon tip. This subtractive method of producing the high aspect ratio needle offers the advantage of high lateral stiffness and rigidity of the tip.

The probe offers unique features:

  • length of the high aspect ratio portion of the tip > 2 µm
  • typical aspect ratio at 2 µm in the order of 7:1 (when viewed from side as well as along cantilever axis)
  • half cone angle at 2 µm of the high aspect ratio portion typically < 5°
  • guaranteed tip radius of curvature < 15 nm
  • highly doped silicon to dissipate static charge
  • high mechanical Q-factor for high sensitivity
  • alignment grooves on backside of silicon holder chip
  • precise alignment of the cantilever position (within +/- 2 µm) when used with the Alignment Chip
  • compatible with PointProbe® Plus XY-Alignment Series
This AFM probe features alignment grooves on the back side of the holder chip. These grooves fit to the NANOSENSORS Alignment Chip.

How to optimize AFM scanning parameters: list-img
Cantilever data:
Property Nominal Value Specified Range
Resonance Frequency [kHz] 190 146 - 236
Force Constant [N/m] 48 21 - 98
Length [µm] 225 215 - 235
Mean Width [µm] 38 30 - 45
Thickness [µm] 7 6 - 8
Order codes and shipping units:
Order Code AFM probes per pack Data sheet
AR5-NCLR-10 10 of all probes
AR5-NCLR-20 20 of all probes
AR5-NCLR-50 50
AR5-NCLR-W 370

Special handling information for NANOSENSORS™

Due to their unique geometry the tips of the are more susceptible to tip damage by electrostatic discharge (ESD) than other Silicon-SPM-Probes.

Electric fields near the probe chip may lead to field evaporation which can blunt the tip apex of the probe tip. Therefore the NANOSENSORS™ are shipped in specially designed ESD-safe chip carriers.

NANOSENSORS™ recommends to their customers to take appropriate precautions to avoid tip damage due to electrostatic discharge when handling the probes. This can for example be done by using anti-electrostatic mats, wrist bands and tweezers.

NANOSENSORS™ High Aspect Ratio Silicon AFM probes