Home▸Nanotechnology & MEMS▸Scanning Tunnelling Microscope: Tip Gap, Exponential Current and Atomic Lattice Scan

🔬 Scanning Tunnelling Microscope: Tip Gap, Exponential Current and Atomic Lattice Scan

A tungsten-like tip hovers a few angstroms over an atomic lattice. The tunnelling current falls ten-fold per angstrom; a feedback loop holds it constant while the tip scans and traces the atoms.

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⚙ Under the hood

A tip hovers a few angstroms above an atomic lattice. The tunnelling current falls about ten-fold per angstrom; a feedback loop holds it constant while the tip scans, and the recorded heights map the atoms, checked against the exact barrier formula.

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