Details
Point Probe® Plus Non-Contact /Tapping Mode - Long Cantilever - Au coating (Detector side)
The Point Probe® Plus (PPP) combines the well-known features of the proven PointProbe® series such as high application versatility and compatibility with most commercial SPMs with a further reduced and more reproducible tip radius as well as a more defined tip shape. The typical tip radius of less than 7 nm and the minimized variation in tip shape provide more reproducible images and enhanced resolution.
NANOSENSORS™ PPP-NCLAuD probes are designed for non-contact mode or tapping mode AFM (also known as: attractive or dynamic mode). The NCL type is offered as an alternative to NANOSENSORS™ high frequency non contact type (NCH). PPP-NCLAuD is recommended if the feedback loop of the microscope does not accept high frequencies (400kHz) or if the detection system needs a minimum cantilever length >125µm. Compared to the high frequency non-contact type NCH the maximum scanning speed is slightly reduced. This probe type combines high operation stability with outstanding sensitivity and fast scanning ability.
The probe offers unique features:
• Guaranteed tip radius of curvature < 10 nm
• Tip height 10 - 15 µm
• Highly doped silicon to dissipate static charge
• Au coating on detector side of cantilever
• Chemically inert
A metallic layer (Au) is coated on the detector side of the cantilever which enhances the reflectivity of the laser beam by a factor of about 2.5. Furthermore it prevents light from interfering within the cantilever. The virtually stress-free coating is bending the cantilever less than 2 % of the cantilever length.
Cantilever Specifications
|
Spring k (N/m |
48 (21 - 98)
|
Freq (kHz) |
190 (146 - 236)
|
Length (µm) |
225 (215 - 235)
|
Width (µm) |
38 (30 - 45)
|
Thickness (µm) |
7.0 (6.0 - 8.0)
|
Shape |
Rectangular
|
Material |
Silicon
|
Reflex Coating (nm) |
Cr/Au (5/35)
|
Tip Specifications
|
Tip radius (nm) |
7
|
Tip height (µm) |
12.5 +/- 2.5
|
Front angle (°) |
25 +/- 2
|
Back angle (°) |
15 +/- 2
|
Side angle (°) |
22.5 +/- 2
|
Tip shape |
4-sided
|
Tip material |
Silicon
|
Tip coating (nm) |
None
|
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