John C. Bean - WeCanFigureThisOut.org

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Scanning Tunneling Microscope - How Nanoscientists see Atoms

This podcast is drawn from the
Science Technology

This podcast is drawn from the "Virtual Lab" of WeCanFigureThisOut.org. This Virtual Lab uses 3D virtual reality animations to explain electronics, microelectronics and nanotechnology. This podcast explains how scanning tunneling microscopes (STM's) work. STM's are one the nanoscientist's best tools for seeing individual atoms.

Episodes: 16

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

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

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

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

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Cover art for The heart of the STM is an atomically sharp probe.

The heart of the STM is an atomically sharp probe.

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

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

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

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

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

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

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

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

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Cover art for Another crystal moves it side to side.

Another crystal moves it side to side.

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Cover art for A third crystal moves it up and down.

A third crystal moves it up and down.

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Cover art for Let's see how these work together to create an atomic scale map of the sample surface.

Let's see how these work together to create an atomic scale map of the sample surface.

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