Method and device for ion mobility separation
Methods and devices for ion separations or manipulations in gas phase are disclosed. The device includes a non-planar surface having a first, second and third region. An inner arrays of electrodes is positioned on the first region. A first set of electrodes of the inner array of electrodes is configured to receive RF voltages and generate a first potential upon the receipt of the RF voltage. A first and second outer arrays of electrodes are coupled to the second and third region, respectively. The first and second outer arrays are configured to receive a first DC voltage and generate a second potential upon the receipt of the first DC voltages. The first and second generated potential manipulate movement of ions.
1. An ion mobility manipulation device comprising:
a non-planar surface comprising a first, second and third region;
an inner array of electrodes positioned on the first region, a first set of electrodes of the inner array of electrodes configured to receive RF voltages and generate a first potential upon the receipt of the RF voltage; and
a first and second outer arrays of electrodes coupled to the second and third region, respectively, the first and second outer arrays configured to receive a first DC voltage and generate a second potential upon the receipt of the first DC voltages,
wherein the first and second generated potential manipulate movement of ions.
2. The device of claim 1 , wherein the non-planer surface is curved to form an ion channel, wherein movement of ions occurs in the ion channel.
3. The device of claim 2 , wherein the inner array of electrodes, the first and second outer arrays of electrodes and the ionization separation channel extend along a length of the device.
4. The device of claim 2 , wherein the first outer array of electrodes is positioned on a first side of the inner array of electrodes, and the second outer array of electrodes is positioned on a second side of the inner array of electrodes.
5. The device of claim 2 , wherein the inner array of electrodes comprises a second set of electrodes configured to receive a second DC voltage.
6. The device of claim 5 , wherein the second set of electrodes generate a gradient potential that drives the ions in the ion channel.
7. The device of claim 5 , wherein electrodes of the first set of electrodes are separated by electrodes of the second set of electrodes.
8. The device of claim 2 , wherein the first set of electrodes of the inner array of electrodes is configured to receive a second DC voltage.
9. The device of claim 8 , wherein RF voltages received by neighboring electrodes of the first set of electrodes are phase shifted.
10. The device of claim 1 , wherein the second potential confines the ions along a lateral direction associated with the device.
11. The device of claim 1 , wherein RF voltages received by adjacent electrodes of the first set of electrodes have a phase difference.
12. The device of claim 11 , wherein the phase difference is 180 degrees.
13. The device of claim 1 , wherein the first generated potential inhibits the ions from approaching the non-planer surface.
14. The device of claim 1 , further comprising a cover enclosure, wherein the cover enclosure is configured to guard against an external potential.
15. The device of claim 14 , wherein the cover enclosure is configured to receive a potential.
16. The device of claim 1 wherein the non-planar surface is one of the following shapes: cylindrical, a spiral, a funnel, hemispherical, or elliptical.