uniqprobe™ uniform quality SPM probe – Contact or dynamic mode for Biology in dynamic (AC) mode

The NANOSENSORS uniqprobe combines the well-known features of the other NANOSENSORS AFM probe series such as high application versatility and compatibility with most commercial SPMs with the additional advantage of a strongly reduced dispersion of force constant and resonance frequency. The unsurpassed uniformity of the mechanical characteristics of the uniqprobe series is particularly important for applications, where a large number of probes with known and near identical force constants or resonance frequencies are needed. The sensors of the uniqprobe series are especially adapted for molecular biology, biophysics and quantitative nano-mechanical studies.
The reflex gold coating deposited on the detector side of the cantilever covers only the free end above where the tip is located. Main advantages of the uniqprobe coating are considerably less cantilever bending and reduced drift particularly for measurements in liquid environments.
NANOSENORS qp-BioAC AFM probes are designed for mainly dynamic mode AFM imaging in air or liquid environments, but can also be used in contact mode. These probes feature three different rectangular cantilevers on one side of the support chip. The uniqprobe BioAC type unites fairly high resonance frequencies with low force constants. The combination of these characteristics leads to stable, low noise and fast measurements with reduced tip-sample interaction. 
The probe offers unique features:
  • small dispersion of force constant and resonance frequency 
  • typical tip height 7µm 
  • typical tip radius of curvature smaller than 10nm
  • stress free cantilevers with considerably less bending
  • tip and cantilevers are made of a quartz-like material
  • reduced drift for applications in liquid environments
  • tip repositioning accuracy of better than ± 8 µm (in combination with Alignment Chip)
  • chemically inert
Cantilever data:
Property Nominal Value Specified Range
Resonance Frequency / kHz CB1: 90
CB2: 50
CB3: 30
CB1: 65 - 115
CB2: 35 - 65
CB3: 24 - 36
Force Constant /(N/m) CB1: 0.3
CB2: 0.1
CB3: 0.06
CB1: 0.15 - 0.55
CB2: 0.06 - 0.18
CB3: 0.03 - 0.09
Length /µm CB1: 40
CB2: 60
CB3: 80
CB1: 35 - 45
CB2: 55 - 65
CB3: 75 - 85
Mean Width /µm CB1: 20
CB2: 25
CB3: 30
CB1: 18 - 22
CB2: 23 - 27
CB3: 28 - 32
Thickness /nm CB1: 400
CB2: 400
CB3: 400
CB1: 370 - 430
CB2: 370 - 430
CB3: 370 - 430
Order codes and shipping units:
Order Code AFM probes per pack
qp-BioAC-10 10
qp-BioAC-20 20
qp-BioAC-50 50

Special handling information for NANOSENSORS™ uniqprobes

Due to their unique geometry the tips of the uniqprobes 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™ uniqprobes 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™ uniqprobe AFM Probes series