16 episodes
Scanning Tunneling Microscope - How Nanoscientists see Atoms John C. Bean - WeCanFigureThisOut.org
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- Science
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.
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This podcast is drawn from the Virtual Lab presentations of WeCanFigureThisOut.org. The copyrighted material of this site was developed under funding from National Science Foundation CCLI, NIRT, MRSEC and NUE programs. This project is led by John C.
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Scanning tunneling microscopes (STMs) allow nanoscientists to see individual atoms.
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To see how a Nanosurf easyScan STM works, let's take it apart in virtual reality.
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The heart of the STM is an atomically sharp probe.
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A voltage induces electrons to jump from the probe's tip to the sample atoms.
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A feedback loop holds the electron current constant by keeping the distance from probe to sample constant.
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