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Lecture 15: XRD and Other Analytical Techniques X-Ray Diffraction ...

Lecture 15: XRD and Other Analytical Techniques X-Ray Diffraction ...

Lecture 15: XRD and Other Analytical Techniques X-Ray Diffraction ...

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Scanning Tunnelling Microscopy (STM)<br />

!<br />

* look at electronic structure of surface<br />

* position tip over point, ramp voltage<br />

* negative sample bias: electrons tunnel from sample to tip<br />

* measure tunneling current<br />

* can’t be used on insulators

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