Electrospray ionization Taylor cone

Fig. 5.3. A photograph of the spray generated in an electrospray ionization source (top) and a schematic view of the processes involved (bottom). From the Taylor cone, a jet is emitted and expands to a plume of micrometer-sized charged droplets from which finally desolvated ions are produced.

Figure 7.1 Silicon micropillar array electrospray ionization (fiPESI) chip, (a) (A) Setup of the pPES measurements. (B) Eormation of the Taylor cone and spray from the small (4 mm X 9 mm) fiPESI chip. The diameter of the pillars was 60 /tm and the distance between the pillars was 15 pm. The liquid sample contained 95% acetonitrile, 4.9% water and 0.1% formicacid. The high voltageappliedtothechipwas3kV. (b) Schematic of the cross-sectional and top views of the chip design during fabrication [34]. Reproduced from Nissila, T, Sainiemi, L, Sikanen, T, Kotiaho, T, Eranssila, S., Kostiainen, R., Ketola, R.A. (2007) Silicon Micropillar Array Electrospray Chip for Drug and Biomolecule Analysis. Rapid Commun. Mass Spectrom. 21 3677-3682 with permission from John Wiley and Sons...

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