Question

9. The scanning-tunneling microscope works on the principle of electron tunneling. Imagine you are trying to optimize your scanning tunneling microscope. Your microscope has a gold tip (work function 5.1 eV) and your electron has a kinetic energy of 4.6 eV (a) If you move the tip to sample distance from 0.3 nm to 0.2nm how does the transmission probability change? (b) You have a "brilliant" idea. What if you use protons instead of electrons? How will the transmission probability change? 15P

Answer 1

5-1 e abili transmissio = 1.415 e abilit 0. 184 o times mass Os ma43 Thamsmissm

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