Not exact matches
The first method
involves colliding a negatively
charged muon and a muonium
atom made up of a positive muon and an electron.
20 years ago scientists postulated that other molecules had to be
involved: positively
charged cyclic hydrocarbon molecules in which five to six carbon
atoms are bonded together, also known as cyclic carbenium ions.
The team used a novel technique that
involves replacing the electrons in hydrogen
atoms with negatively
charged particles called muons, and then measuring subtle shifts in the energy that is required to bump a muon into a higher - energy orbit around the single - proton nucleus.
«Our approach provides
atom - by -
atom control of the size and electron - by - electron control of the
charge state of metal clusters on surfaces,» said Dr. Grant Johnson, a physical chemist
involved in the study and former Linus Pauling Fellow who recently joined the Laboratory as a full - time scientist.
Producing commercially relevant quantities
involves the reduction in solution of positively
charged metal ions to neutral
atoms in the presence of organic molecules called ligands, which arrest the growth at a particular number of metal
atoms.