Ion Trapping, Storage, and Ejection in Structures for Lossless Ion Manipulations.
Ion Trapping, Storage, and Ejection in Structures for Lossless Ion Manipulations.
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DOI：
10.1021/acs.analchem.5b00214
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发表时间：
2015-06-16
影响因子：
7.4
通讯作者：
Smith RD
中科院分区：
文献类型：
--
作者：
Zhang X;Garimella SV;Prost SA;Webb IK;Chen TC;Tang K;Tolmachev AV;Norheim RV;Baker ES;Anderson GA;Ibrahim YM;Smith RD
构建了一种新型的无损离子操作结构（SUM）模块，该模块将电极阵列设计在一对平行印刷电路板（PCB）上，并用于研究在4 Torr压力下离子捕获的能力。正离子被射频电压限制在一系列内阶电极上，相邻电极上有交变相位，与每个PCB上周围保护电极上的正直流电位一起。通过逐步改变施加于内梯级电极的直流电势，还引入了轴向直流电场，以控制离子在离子捕获区域内的传输和积累。我们的研究表明，离子可以被捕获并以高达100%的效率积累，储存至少5小时而没有明显的损失，然后可以迅速从SUM陷阱中弹出。目前的结果为开发更复杂的SUM设备提供了基础，这些设备便于扩展离子操作。
A new Structures for Lossless lon Manipulations (SUM) module, having electrode arrays patterned on a pair of parallel printed circuit boards (PCB), was constructed and utilized to investigate capabilities for ion trapping at a pressure of 4 Torr. Positive ions were confined by application of RF voltages to a series of inner rung electrodes with alternating phase on adjacent electrodes, in conjunction with positive DC potentials on surrounding guard electrodes on each PCB. An axial DC :field was also introduced by stepwise varying the DC potentials applied to the inner rung electrodes to control the ion transport and accumulation inside the ion trapping region. We show that ions can be trapped and accumulated with up to 100% efficiency, stored for at least 5 h with no significant losses, and then could be rapidly ejected from the SUM trap. The present results provide a foundation for the development of much more complex SUM devices that facilitate extended ion manipulations.