Atom Probe Analysis of One Dimensional Organic Chain: Polyethylene Glycol

Scanning Atom Probe Analysis of Metal Chelate Compound

“…Figure 3 shows the mass spectrum of the PEG 1000 matrix solely supported on CF analyzed by reflectron-AP. The counts of ions assignable to C n + (n = 1, 2, 3, ... ; m/z = 12, 24, 36, …) ions from CF are small in this mass spectrum therefore the major component of mass peak around m/z = 60 should be not C 5 + but fragments originated from PEG 1000.The PEG 1000 polymer (oligomer) chains were found to desorb not as molecular ions, but as small fragments produced by stepwise covalent bond cleavage from the ends of the expanded chains as in our previous results using tungsten tip as substrate[11]. The observed ions are assigned by the sequence of carbon and oxygen atoms along the main chain of ethylene glycol.…”