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. Author manuscript; available in PMC: 2016 Feb 10.
Published in final edited form as: Anal Chem. 2015 Oct 28;87(22):11301–11308. doi: 10.1021/acs.analchem.5b02481

Figure 1.

Figure 1

(A) Schematic diagram of the instrumental arrangement. (B) Illustration of a portion of the 30 cm long TW-SLIM module showing the rf, traveling wave, and guard electrodes on one of the two PCB surfaces. The TW voltages are applied to subsets of eight electrodes numbered 1 through 8 forming a traveling wave. The sequence is repeated for the length of the module, on both surfaces. (C) The application of a 11110000 sequence to electrodes 1–8 is shown with the first step in the sequence indicated by the dashed red line (see text).