Guiding principles of this STM design¶

1. Minimise the effects of external vibrations by minimising size and mass
2. Minimise the effects of temperature variation by matching material coefficients of expansion as closely as possible
3. Minimise the effects of electronic noise by locating the sensitive circuitry as close as possible to the signal source
4. Maximise instrument flexibility and ease of use by doing as much of the signal processing and control as possible in the digital domain

Main building blocks of the STM¶

High frequency vibration isolator¶

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Piezotube and sample mount¶

Coarse positioner mechanism and probe holder¶

Piezotube and coarse positioner support¶

Bias voltage module¶

Tunnelling current amplifier¶

Control module¶