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Acronyms that contain the term Microscopy, Scanning Tunneling 

What does Microscopy, Scanning Tunneling mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: Microscopy, Scanning Tunneling.

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STM

Scanning Tunneling Microscopy

Academic & Science » Electronics

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APSTM

Apertured Photon Scanning Tunneling Microscopy

Miscellaneous » Unclassified

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PSTM

Photon Scanning Tunneling Microscopy

Academic & Science » Chemistry

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STM

Scanning Tunneling Microscopy

Medical » Laboratory

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STM

Scanning Tunneling Microscopy

Academic & Science » Physics

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STM

Scanning Tunneling Microscopy

Computing » IT

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What does Microscopy, Scanning Tunneling mean?

microscopy, scanning tunneling
A scanning tunneling microscope (STM) is a type of microscope used for imaging surfaces at the atomic level. Its development in 1981 earned its inventors, Gerd Binnig and Heinrich Rohrer, then at IBM Zürich, the Nobel Prize in Physics in 1986. STM senses the surface by using an extremely sharp conducting tip that can distinguish features smaller than 0.1 nm with a 0.01 nm (10 pm) depth resolution. This means that individual atoms can routinely be imaged and manipulated. Most scanning tunneling microscopes are built for use in ultra-high vacuum at temperatures approaching zero kelvin, but variants exist for studies in air, water and other environments, and for temperatures over 1000 °C. STM is based on the concept of quantum tunneling. When the tip is brought very near to the surface to be examined, a bias voltage applied between the two allows electrons to tunnel through the vacuum separating them. The resulting tunneling current is a function of the tip position, applied voltage, and the local density of states (LDOS) of the sample. Information is acquired by monitoring the current as the tip scans across the surface, and is usually displayed in image form.A refinement of the technique known as scanning tunneling spectroscopy consists of keeping the tip in a constant position above the surface, varying the bias voltage and recording the resultant change in current. Using this technique the local density of the electronic states can be reconstructed. This is sometimes performed in high magnetic fields and in presence of impurities to infer the properties and interactions of electrons in the studied material. Scanning tunneling microscopy can be a challenging technique, as it requires extremely clean and stable surfaces, sharp tips, excellent vibration isolation, and sophisticated electronics. Nonetheless, many hobbyists build their own microscopes.

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