Field ionization is defined as a technique for ionizing molecules in the vapor phase by exposing them to a strong electric field generated by a sharp point or edge electrode, leading to the formation of odd …

FI utilizes 10-micron diameter tungsten emitter wires on which carbon whiskers, or dendrites, have been grown. A high electric field gradient (10 8 V/cm) at the tips of the whiskers produces ionization by …

In field ionization, electrons are removed from a species by quantum mechanical tunneling in a high electric field, which results in the formation of molecular ions (M + ̇ in positive ion mode).

Similar to electron field emission, field ionization of gas molecules is produced by quantum tunneling of electrons through a potential barrier that is narrowed by the presence of a local high field (Fig. 1). …

Here, the electric field causes analogous distortion of the potential, and with sufficient field strength, the atom is field ionized, too.

Field ionization utilizes gaseous samples whereas in field desorption the sample is adsorbed directly onto the electrode. Both of these techniques are soft, resulting in low energy ions which do not easily …

The discovery of the ionizing effect of strong electric fields in the order of volts per Ångstrom in the early 1950s eventually led to the development of field ionization-mass spectrometry (FI-MS).

A process similar to *field emission but one in which electrons are emitted from an atom in the presence of an intense electric field and are captured by the surface of a nearby metal, resulting in ionization of …

Jan 2, 2024 · Field ionization is used in domains such as analytical chemistry and physics to analyze atomic and molecule structures precisely by producing ions for subsequent investigation. …

Apr 21, 2025 · Independent measurements in helium and argon, accompanied by a fitting to a strong-field ionization dynamic model, yield accurate and consistent results across a wide range of gas …