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Podcasts›Scanning Tunneling Microscope - How Nanoscientists see Atoms›Scanning tunneling microscopes (STMs) allow nanoscientists to see individual atoms.

Scanning tunneling microscopes (STMs) allow nanoscientists to see individual atoms. artwork

Technology

Scanning tunneling microscopes (STMs) allow nanoscientists to see individual atoms.

Scanning Tunneling Microscope - How Nanoscientists see Atoms by John C. Bean - WeCanFigureThisOut.org

Jul 24, 20170:09Technology

Scanning tunneling microscopes (STMs) allow nanoscientists to see individual atoms. - Scanning Tunneling Microscope - How Nanoscientists see Atoms

Related Episodes

Continue listening to more episodes from Scanning Tunneling Microscope - How Nanoscientists see Atoms.

To see how a Nanosurf easyScan STM works, let's take it apart in virtual reality.

Jul 24, 2017 - 0:06

The heart of the STM is an atomically sharp probe.

Jul 24, 2017 - 0:15

A voltage induces electrons to jump from the probe's tip to the sample atoms.

Jul 24, 2017 - 0:16

A feedback loop holds the electron current constant by keeping the distance from probe to sample constant.

Jul 24, 2017 - 0:10

But how can it move the probe over these tiny nanometer distances?

Jul 24, 2017 - 0:12

Voltages to a piezoelectric crystal move the probe in and out.

Jul 24, 2017 - 0:23

Another crystal moves it side to side.

Jul 24, 2017 - 0:15

A third crystal moves it up and down.

Jul 24, 2017 - 0:15