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Year 1·Month 14·Week 4

Day 390: Scanning Tunneling Microscope (STM)

Day 390 of 2,016~16 min read

Learning Objectives

•**Explain** the basic operating principle of the scanning tunneling microscope
•**Derive** the exponential dependence of tunneling current on tip-sample distance
•**Calculate** typical tunneling currents and required tip sharpness
•**Distinguish** between constant-current and constant-height imaging modes
•**Understand** scanning tunneling spectroscopy (STS) and its applications
•**Appreciate** the revolutionary impact of STM on surface science and nanotechnology

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