Primary and secondary droplet and charge transmission characteristics of desorption electro-flow focusing ionization

Abstract

A novel method to produce small droplets from large nozzles Rev.Evolution of a compound droplet attached to a core-shell nozzle under the action of a strong electric field

Chemical imaging of artificial fingerprints by desorption electro-flow focusing ionization mass spectrometry

“…The geometric conguration also enables interrogation in regimes including charged-droplet-based electrospray and corona discharge chemical ionization at potentials less than 1 kV. 16,18,19 This technique also benets from rapid imaging under atmospheric conditions of samples with minimal or no sample preparation. The chemical distributions investigated in this study were generated by an articial ngerprint mold (Fig.…”

Rapid detection and isotopic measurement of discrete inorganic samples using acoustically actuated droplet ejection and extractive electrospray ionization mass spectrometry

“…The extractive electrospray ionization (EESI) component of the investigated system comprised an electro‐flow focusing ionization source (Ingeniatrics Tecnologías, Sevilla, Spain). The electro‐flow focusing (EFF) source has been investigated and characterized in‐depth as a desorption‐style ionization technique for ambient mass spectrometry detection and imaging . The EFF source employs a recessed capillary (150 µm i.d.)…”

Recent advances in ambient mass spectrometry of trace explosives

“…The significant reduction in distance between potentials, enables high electric fields to be generated at low potentials. 117 Though the physics of jet formation are altered, DEFFI also generates charged secondary droplets that result in electrospray ionization mechanisms.…”

“…Alternatively, conductive surfaces ( e.g., metallic) exhibit very fast charge relaxation timescales, which leads to near instantaneous loss of charge from primary droplets as they impact the surface, yielding low current carried by secondary droplets and inefficient analyte ionization. 117…”