Scanning
probe microscopy (SPM) is a branch of microscopy that forms images of
surfaces using a physical probe that scans the specimen. An image of the
surface is obtained by mechanically moving the probe in a raster scan of the
specimen, line by line, and recording the probe-surface interaction as a
function of position. SPM was founded with the invention of the scanning tunneling
microscope in 1981.
In
the early 1980's two IBM scientists, Binnig & Rohrer, developed a new
technique for studying surface structure - Scanning Tunnelling Microscopy
( STM ). This invention was quickly followed by the development of a whole family of related
techniques which, together with STM, may be classified in the general
category of Scanning Probe Microscopy ( SPM ) techniques. Of these later
techniques, the most important is Atomic Force Microscopy ( AFM ).
Experimental
techniques used to image both organic
and inorganic surfaces with (near) atomic resolution. Includes atomic force microscopes and
scanning tunneling
microscopes.
Generic
name for different scanning microscopes, where a local probe collects surface
or topography related information through a specific interaction between this
probe and the surface under investigation. This interaction can be the tunnel
current for STM or the force or damping of an oscillation in the case of an
AFM for example.
Scanning
probe microscopes (spms) pass a needle-like probe over the surface of a molecule and record an image of that surface.
Different spms can not only map the topography but also determine the type of
atoms and their thermal and magnetic properties. Scanning
tunnelling microscopes and atomic force microscopes are types of spms. For
more information see Scanning probe microscopy (SPM) (Missouri Botanical
Garden, USA).