| Coaxial probes consist of a tapered metal wire running through a metal-coated, glass nanopipette. The wire may protrude slightly from the coated nanopipette edge and it remains exposed at the tip. The metal coating on the insulating glass provides the wire with the necessary electrical shielding required for sensitive STM measurements. |  |
 Cantilevered Coaxial Probe for sensitive STM measurements |
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Coaxial Probes Specifications |
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Pipette material |
Borosilicate glass |
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Electrode Diameter |
>10 nm |
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Insulator Thickness |
> 200 nm |
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Shank diameter |
1.0-1.5 mm |
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Taper length |
3-10 mm |
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Total length |
5 mm- 5 cm |
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Electrode material |
Pt, Pt-Ir, Ag or Au (standard), other metals available |
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Coating material |
Ag, Au, Al, Cr or Ni |
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Tip diameter |
>100 nm |
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Starting Wire diameter |
25 or 50 µm |
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Tip profile |
Flat end to 1µm protrusion (custom designs available) |
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Cantilever Characteristics |
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Cantilever Height |
50 µm - 500 µm (Deep Trench probes available) |
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Cantilever Length |
300- 1000 µm |
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Force Constant |
5-20 N/m |
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Resonant Frequency |
20-390 kHz |
