scanning tunneling microscope

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scanning tunneling microscope

n.
A microscope that scans the surface of a sample with a beam of electrons, causing a narrow channel of tunneling electrons to flow between the sample and the beam, and producing three-dimensional images of atomic topography and structure.

scan′ning tun′neling mi`croscope


n.
an electronic microscope that produces images of atomic structures by moving an extremely fine probe over the surface of a material.
Abbr: STM
[1980–85]

scanning tunneling microscope

A microscope used to make images of individual atoms on the surface of a material. The microscope has a probe ending in a tiny sharp tip that moves along the material's surface while emitting a stream of electrons. The flow of electrons is constant so long as the distance between the tip and the material's surface atoms is held constant. An image is formed based on the continual adjustments made to the height of the tip to keep the electron flow constant over the "bumps" that are the atoms.
References in periodicals archive ?
Contract notice: low temperature scanning tunneling microscope institute of chemistry
Unlike scanning tunneling microscopy assembly, this approach can work within the bulk of a 3D solid.
The scanning tunneling microscope (STM) is commonly applied in studying materials' local surface property of electron states in real space at atomic resolution [1] under various conditions (high magnet [2], ultrahigh vacuum [3], ultralow temperature [4], and water solution [5]).
Their topics include spintronics and spintronic applications, L10 alloy thin films and nanostructures, nonlinear dynamic properties of two-dimensional arrays of magnetic nanodots, nonlinear optics in magnetic nanostructures, and spin-polarized scanning tunneling microscopy.
TEHRAN (FNA)- Physicists used a scanning tunneling microscope to create a minute transistor consisting of a single molecule and a small number of atoms.
Agilent Technologies now offers inverted light microscope (ILM) and scanning tunneling microscope (STM) capabilities for the recently introduced 7500 atomic force microscope platform.
In previous research, microstructures and electrical properties of CVD diamond films that were investigated by atomic force microscopy (AFM) and scanning tunneling microscopy (STM) were studied [6, 7].
The topics include the basic theory of the molecule-metal interface, scanning tunneling microscope studies of the interfaces, X-ray standing waves and surfaces X-ray scattering studies of molecule-metal interfaces, the fundamental structure of organic solids and their interfaces by photoemission spectroscopy and related methods, and vibrational spectroscopies for future studies of the molecule-metal interface.
A team carefully pointed the tip of a scanning tunneling microscope, which can manipulate surfaces at atomic scales, toward a thin magnetic film.
To make the movie, IBM researchers used a tool attached to a scanning tunneling microscope that used a fine needle tip to move single molecules and atoms around.
"Our idea was to control this." The researchers used a new technique called electrostatic manipulation scanning tunneling microscopy to "lift" the top layer of graphite, creating graphene.
This development--made possible with a low-temperature scanning tunneling microscope at Tufts, one of only about 100 in the US--may be the first step toward a new class of devices that could be used in applications ranging from medicine to engineering.

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