Scanning Tunnelling Microscope

h1. Guiding principles of this STM design

# Minimise the effects of external vibrations by minimising size and mass

# Minimise the effects of temperature variation by matching material coefficients of expansion as closely as possible

# Minimise the effects of electronic noise by locating the sensitive circuitry as close as possible to the signal source

# Maximise instrument flexibility and ease of use by doing as much of the signal processing and control as possible in the digital domain

h1. Main building blocks of the STM

h2. High frequency vibration isolator

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h2. Piezotube and sample mount

h2. Coarse positioner mechanism and probe holder

h2. Piezotube and coarse positioner support

h2. Bias voltage module

h2. Tunnelling current amplifier

h2. Control module