ULTRA-SHORT CANTILEVERS

for High-Speed AFM

USC Cantilever 3D View

USC Support Chip 3D View

USC Tip Front View

USC Tip Detail

 

General

NanoWorld Ultra-Short Cantilevers (USC) for High-Speed AFM (HS-AFM) combine very small cantilevers made of a quartz-like material which are designed for resonating at frequencies of up to 5 MHz and a very sharp and wear resistant High Density Carbon/Diamond Like Carbon (HDC/DLC) tip.

 

  • especially designed for high speed scanning applications
  • cannot be used in all commercial SPMs and AFMs due to the small dimensions
    of the cantilevers (see next page)
  • cantilever and tip are supported by a single crystal silicon support chip
  • no intrinsic stress and absolutely straight cantilevers

Cantilever

  • rectangular cantilever with rounded corners at the freestanding end
  • cantilever made of quartz-like material

Support Chip

  • dimensions of the support chip are very reproducible (3.4 mm x 1.6 mm x 0.3 mm)
  • etched and lowered corners of the support chip avoid contact between the support chip and the sample
  • alignment grooves on the back side of the silicon support chip in conjunction with the alignment chip ensure replacement of the probes without major readjustments of the laser beam

Tip

  • nanotools-logonanotools® High Density Carbon/Diamond Like Carbon (HDC/DLC) tip
  • tip height typically 2.5 µm and radius of curvature typically < 10 nm
  • tip aspect ratio typically 5:1 and tilt compensation of 8°

Package Sizes

  • package of 10 AFM probes

AVAILABLE COATINGS

Gold Reflex Coating

  • 20/30 nm thick gold reflex coating on both sides of the probe
  • enhances reflectance of the laser beam
  • tip remains uncoated

System limitations: due to their small cantilever sizes and their very high resonance frequencies USC probes currently cannot be used in all commercially available SPMs and AFMs. Only AFMs with a sufficiently small laser spot and electronics that are capable of dealing with high resonance frequencies of up to 5 MHz are able to work with the USC probes. If in doubt whether these probes can be used in your AFM please check back with us or with your AFM manufacturer.

USC-F5-k30 Cantilever

USC-F5-k30 Cantilever
3D View

USC-F5-k30 Cantilever Top View

USC-F5-k30 Cantilever
Top View

USC-F1.2-k0.15 Cantilever 3D View

USC-F1.2-k0.15 Cantilever
3D View

USC-F1.2-k0.15 Cantilever Top View

USC-F1.2-k0.15 Cantilever
Top View

In order to cover a wide range of possible applications using High-Speed AFM, six different types of Ultra-Short Cantilevers (USC) have been developed: three types with very high resonance frequencies (1.2 MHz – 5 MHz) and high force constants mainly for dynamic mode applications in air and three types with high resonance frequencies and low force constants (0.15 N/m – 0.6 N/m) mainly for applications in liquid.

 

USC mainly for dynamic mode applications in air

  • resonance frequency of 1.2 MHz and higher
  • stiffness of 3.0 N/m and higher
  • mainly designed for applications in non-contact mode in air but can also be used for
    other applications
Type USC-F5-k30 USC-F2-k3 USC-F1.2-k7.3
Resonance Frequency 5.0 MHz 2.0 MHz 1.2 MHz
Force Constant 30 N/m 3.0 N/m 7.3 N/m
Cantilever length 10 µm 10 µm 20 µm
Cantilever width 5 µm 5 µm 10 µm
Cantilever thickness 0.68 µm 0.28 µm 0.67 µm

USC mainly for applications in liquid

  • resonance frequency of 1.5 MHz and lower
  • stiffness of 0.6 N/m and lower
  • mainly designed for applications in liquid but can also be used for applications in air
    (depending on the application)
Type USC-F1.5-k0.6 USC-F1.2-k0.15 USC-F0.3-k0.3
Resonance Frequency* 1.5 MHz 1.2 MHz 0.3 MHz
Force Constant 0.6 N/m 0.15 N/m 0.3 N/m
Cantilever length 7 µm 7 µm 20 µm
Cantilever width 3 µm 2 µm 10 µm
Cantilever thickness 0.10 µm 0.08 µm 0.19 µm
* Values in air

For more information on ongoing developments of AFM probes for High-Speed AFM and for application examples please have a look at: www.highspeedscanning.com