6533b859fe1ef96bd12b78f1

RESEARCH PRODUCT

UV LED Photo Electron Ionisation for MS and IMS

C. ZimmerG. SchönhenseTheodor DollJürgen SchubertK. MedyanykUlrich Kunze

subject

Range (particle radiation)Gas-discharge lampSiliconChemistry(all)Analytical chemistrychemistry.chemical_elementGeneral MedicineElectronLanthanum hexaboridePhoton energyMass spectrometrylaw.inventionlanthanum hexaboridechemistry.chemical_compoundchemistrylawIonizationChemical Engineering(all)photoemission

description

AbstractA new MEMS ionisation source for spectrometry is presented on the basis of photo electron emission in silicon MEMS. Lanthanum hexaboride ceramic sample and thin nanolayer proved their suitability for photo electron emission in the desired photon energy range of 3.1eV to 3.9eV which correspond to industrially available UV LED. This ionisation source alternative to a Photoionisationdetector (PID) is inspected of its gas ionisation behaviour using gases with an ionisation potential over and under an energy of 10,6eV. To enable the ionisation of the gases the emitted electrons were accelerated to a well-defined energy. The results of these investigations are comparable to the UV discharge lamp results. Gases can also be ionised by using accelerated electrons of energy as far as 300eV, which cannot raised by a UV discharge lamp.

yearjournalcountryeditionlanguage
2009-09-01Procedia Chemistry
10.1016/j.proche.2009.07.279http://dx.doi.org/10.1016/j.proche.2009.07.279