The Atomic Forge is a fabrication approach that repurposes the scanning transmission electron microscope
to pattern matter down to the atomic level, create 3D nanometer-scale crystalline structures, and create controllable atomic assemblies in 2D and 3D--all in the bulk material--using a combination of STEM electron-beam modification, custom beam control, and real-time feedback.
In the usual scanning transmission electron microscope
(STEM), a narrow beam of electrons is fired down through a sample, scanning back and forth to produce an image.
The new Scanning Transmission Electron Microscope
, installed at the SuperStem laboratory at Daresbury in Cheshire, is not only able to pinpoint the position of single atoms but to analyse the bonds between atoms.
The Nion Hermes Scanning Transmission Electron Microscope
, one of only three in the world, is powerful enough to pinpoint the position of single atoms.
nanoGUNE now has the world's most advanced commercially-available microscope, the Titan(TM) scanning transmission electron microscope
(S/TEM); a Quanta(TM) FEG (field emission gun); and a Helios NanoLab(TM) DualBeam(TM) nanofabrication tool in its new facility.
To spot the camera-shy hydrogen atoms, each team developed slightly different ways of detecting how the materials deflected the electrons in the beam of a scanning transmission electron microscope
To test the process, the team, led by materials scientist Stephen Pennycook, made an image of a silicon crystal using a 300-kilovolt scanning transmission electron microscope
. The corrected image clearly showed not only the individual atoms but also the 0.078 nanometer space between the atoms in the crystal.
The SuperSTEM 2 (Scanning Transmission Electron Microscope
) will enable the study of atoms within materials at 20 million times their normal size.
Miller at the University of Minnesota in Minneapolis and his colleagues developed an improved method for using a scanning transmission electron microscope
(STEM) to measure organic molecules' lenghts.