Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-03-12
Nanotechnology 21, 145702 (2010)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
14 pages, 10 figures
Scientific paper
10.1088/0957-4484/21/14/145702
We report the fabrication and the characterization of carbon fibre tips for their use in combined scanning tunnelling and force microscopy based on piezoelectric quartz tuning fork force sensors. We find that the use of carbon fibre tips results in a minimum impact on the dynamics of quartz tuning fork force sensors yielding a high quality factor and consequently a high force gradient sensitivity. This high force sensitivity in combination with high electrical conductivity and oxidation resistance of carbon fibre tips make them very convenient for combined and simultaneous scanning tunnelling microscopy and atomic force microscopy measurements. Interestingly, these tips are quite robust against occasionally occurring tip crashes. An electrochemical fabrication procedure to etch the tips is presented that produces a sub-100 nm apex radius in a reproducible way which can yield high resolution images.
Agrait Nicolas
Castellanos-Gomez Andres
Rubio-Bollinger Gabino
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