Stability of MeV primary ion induced secondary ions

Jenčič, Boštjan; Vasić, Mirjana; Barba, Žiga; Kelemen, Mitja; Pelicon, Primož

doi:10.1016/j.ijms.2023.117037

Cited by 2 publications

(1 citation statement)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our previous findings have displayed the importance of post desorption decayed fragments on the quality of mass spectra, since these product ions have slightly different energy than the original (precursor) ions, and can be observed as a “background” by the molecular peak. It has been shown that, by increasing primary ion energy and, consequentially, increasing the electronic stopping power contribution, the amount of such fragments decreases.…”

Section: Resultsmentioning

confidence: 99%

Gold-Assisted Molecular Imaging of Organic Tissue by MeV Secondary Ion Mass Spectrometry

Jenčič,

Pongrac,

Vasić

et al. 2023

J. Am. Soc. Mass Spectrom.

Self Cite

View full text Add to dashboard Cite

The quality of molecular imaging by means of MeV primary ion-induced secondary ion mass spectrometry by coating with gold was evaluated on different reference organic molecules and plant samples. The enhancement of the secondary ion yield was evident for the majority of the studied analytes, reaching the highest values at gold thicknesses between 0.5 and 2 nm, and increased the intensity up to 5-fold for reference samples and >2fold for specific peaks within the plant sample. Improved propagation of the electric field due to the target potential on otherwise electrically insulating plant samples was also evident through improved image resolution and by reducing the background in mass spectra. However, detection of several molecules was significantly decreased at even at 1 nm thick gold layer. The results indicated that an optimized sequence of analysis is required to reliably interpret results.

show abstract

Section: Resultsmentioning

confidence: 99%