Materials are held together
by electrons shared between atoms.
The single - atom moving finger of the nc - AFM could feel not only the individual atoms but the forces representing the bonds formed
by the electrons shared between them.
Not exact matches
The atomic size and structure of nitrogen make it an excellent choice for this purpose because it can fit naturally into a strong network of carbon atoms
by creating bonds (sp2) in which
electrons are
shared by the whole network.
Most significant was the September unveiling
by Japanese researchers of a powerful linkage between two silicon atoms that
share three pairs of
electrons — a so - called triple bond.
A chemical bond is the physical phenomenon of chemical substances being held together
by attraction of atoms to each other through
sharing, as well as exchanging, of
electrons - or electrostatic forces.
For the last 100 years, they have done that mostly
by making and breaking the strong covalent bonds that form when atoms
share electrons.
Atoms of most elements, such as hydrogen, oxygen and carbon, form tight chemical bonds
by sharing electrons with their neighbours in order to give each atom a stable configuration of
electrons.
To do that Alice and Bob can
share an additional pair of
electrons connected
by a special quantum link called entanglement.
Unlike regular polymers like the polystyrene that vending machines cups are made from, or the clear polycarbonate that CDs are pressed with, the molecules in the new rubbery polymers are not linked
by strong covalent bonds — which involve atoms
sharing electrons.
In addition to differences in brightness, Gross and colleagues found that bonds that are more
electron - dense actually appear shorter than bonds that
share fewer
electrons — though only
by a few picometres, or 10 - 12 of a metre.
«
By modelling experimental synchrotron data and comparing it with density functional theory calculations, we revealed surprising information about the nature of the
electron sharing between layers in these materials.»
molecule Two or more atoms linked together
by bonds created when they begin
sharing electrons.
A supramolecular assembly — a supermolecule — is an explicitly designed complex of molecules held together
by noncovalent bonds — bonds that do not involve
sharing electrons.
This was 5 years (to the month) after the precursor to the AFM, the scanning tunnelling microscope (STM), had first been successfully tested at IBM's Zurich Research Laboratory
by Binnig and the late Heinrich Rohrer, and 7 months before Binnig and Rohrer were awarded a
share of the Nobel Prize in Physics for the design of the STM (the prize was
shared with Ernst Ruska, the inventor of the
electron microscope).
Normally, molecules are joined
by strong covalent bonds in which the atoms
share electrons, but in the chain they were instead linked
by a freer mechanical bond.