Levitated ~200 nm Au particles in a quadrupole ion trap acquire a carbon barrier under repeated 532 nm laser pulsing in vacuum, increasing mass independently of added carbon-gas pressures and consistent with graphene growth from a hypothesized rare surface catalyst.
Rodriguez and Chris Y
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Experimental methods achieve Q/M measurement precision approaching 10^{-5} for levitated nanoparticles in ultra-high vacuum using ion traps with thermostatic amplitude control.
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Carbon encapsulation of levitated Au nanoparticles
Levitated ~200 nm Au particles in a quadrupole ion trap acquire a carbon barrier under repeated 532 nm laser pulsing in vacuum, increasing mass independently of added carbon-gas pressures and consistent with graphene growth from a hypothesized rare surface catalyst.
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Collection, characterization, and precision measurement of levitated charged nanoparticles
Experimental methods achieve Q/M measurement precision approaching 10^{-5} for levitated nanoparticles in ultra-high vacuum using ion traps with thermostatic amplitude control.