Control Of Screening Of A Charged Particle In Electrolytic Aqueous Paul Trap.
Control Of Screening Of A Charged Particle In Electrolytic Aqueous Paul Trap.
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DOI:
10.1063/1.3586077
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发表时间:
2011
期刊:
影响因子:
--
通讯作者:
Krsti PS
中科院分区:
文献类型:
--
作者:
Park JH;Krsti PS
Individual charged particles could be trapped and confined by the combined radio-frequency and DC quadrupole electric field of an aqueous Paul trap. Viscosity of water improves confinement and extends the range of the trap parameters which characterize the stability of the trap. Electrolyte, if present in aqueous solution, may screen the charged particle and thus partially or fully suppress electrophoretic interaction with the applied filed, possibly reducing it to a generally much weaker dielectrophoretic interaction with an induced dipole. Applying molecular dynamics simulation we show that the quadrupole field has a different effect at the electrolyte ions and at much heavier charged particle, effectively eliminating the screening by electrolyte ions and reinstating the electrophoretic confinement.
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