Colloidal probes with micron spheres of various materials attached to HA_FM tipless cantilevers.
AFM cantilevers of
Etalon series have well-defined resonance of the bulk and stiffness constant due to the features of their production process. Attaching colloidal spheres to Etalon probes one will get predictable behaviour for all the probes from the set ordered.
Colloidal probes with metal coating for conductive AFM measurements are available under request. If before production we get the detailed of application, which colloidal probes are ordered for, we could shift the parameters of the process to optimize probes' properties for their goal.
Each HA_FM chip has two bulks - the customer may choose the bulk, that a colloidal particle should be attached to. Another bulk will be removed to avoid confusion during the work.
The material and the size of the colloidal particles could be chosen from the table below.
Colloidal particles material and size standard offer:
| Material type |
Diameters available, µm |
| SiO2 |
2.01; 3.5; 4.63; 6.62; 10; 15; 28.75 |
| PMMA |
1.5; 3.36; 6.44; 10; 108 |
| BSG |
2; 5; 10; 20 |
| Gold |
1.5 - 3; 3 - 5.5; 5.5 - 9 |
| Glass beads |
10 - 50 |
| Barium Titanate Solid Glass |
74 - 90; 90 - 106 |
| Soda Lime Glass |
100 |
| Polysterene |
1.98; 3.6; 6.1; 10; 15 |
| Glass |
70 - 110; 180 - 212 |
Specification of HA_FM colloidal AFM probes:
| Material |
Polysilicon lever
|
| Chip size |
3.6 x 1.6 x 0.4 mm |
| Reflective side |
Au |
| Cantilever number |
1 rectangular |
| Tip shape |
Colloidal ball |
One of cantilevers for colloidal particle attachement can be choosen:
| Cantilever type |
A |
B |
Typical dispersion |
| Length, L (µm) |
223 |
183 |
± 2 |
| Width, W (µm) |
34 |
34 |
± 3 |
| Thickness, H (µm) |
3 |
3 |
± 0.15 |
| Force Constant (N/m) |
3.5 |
6 |
±20% |
| Resonant frequency (kHz) |
77 |
114 |
± 10% |
