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Issue 18, 2012
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Characterization of microstructured fibre emitters: in pursuit of improved nano electrospray ionization performance

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Abstract

Full-dimensional computational fluid dynamics (CFD) simulations are presented for nano electrospray ionization (ESI) with various emitter designs. Our CFD electrohydrodynamic simulations are based on the Taylor–Melcher leaky-dielectric model, and the volume of fluid technique for tracking the fast-changing liquid–gas interface. The numerical method is first validated for a conventional 20 μm inner diameter capillary emitter. The impact of ESI voltage, flow rate, emitter tapering, surface hydrophobicity, and fluid conductivity on the nano-ESI behavior are thoroughly investigated and compared with experiments. Multi-electrospray is further simulated with 2-hole and 3-hole emitters with the latter having a linear or triangular hole arrangement. The simulations predict multi-electrospray behavior in good agreement with laboratory observations.

Graphical abstract: Characterization of microstructured fibre emitters: in pursuit of improved nano electrospray ionization performance

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Supplementary files

Article information


Submitted
21 Feb 2012
Accepted
31 May 2012
First published
31 May 2012

Analyst, 2012,137, 4150-4161
Article type
Paper

Characterization of microstructured fibre emitters: in pursuit of improved nano electrospray ionization performance

X. Wu, R. D. Oleschuk and N. M. Cann, Analyst, 2012, 137, 4150
DOI: 10.1039/C2AN35249D

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