SIMS proceedings paper
Laser-SNMS investigations on pyrene using Ga+, Bi1+, Bi3+ and Bi5+ as primary ions and different laser wavelengths and laser power densities for photoionization
Article first published online: 12 APR 2012
Copyright © 2012 John Wiley & Sons, Ltd.
Surface and Interface Analysis
Special Issue: Proceedings of the Eighteenth International Conference on Secondary Ion Mass Spectrometry, SIMS XVIII, Riva Del Garda, Trento, Italy, September 18 - 23, 2011
Volume 45, Issue 1, pages 31–34, January 2013
How to Cite
Galla, S., Pelster, A., Draude, F. and Arlinghaus, H. F. (2013), Laser-SNMS investigations on pyrene using Ga+, Bi1+, Bi3+ and Bi5+ as primary ions and different laser wavelengths and laser power densities for photoionization. Surf. Interface Anal., 45: 31–34. doi: 10.1002/sia.4962
- Issue published online: 18 DEC 2012
- Article first published online: 12 APR 2012
- Manuscript Accepted: 13 MAR 2012
- Manuscript Revised: 25 JAN 2012
- Manuscript Received: 11 OCT 2011
- polyatomic ions
Laser secondary neutral mass spectrometry (Laser-SNMS) has been used to simultaneously ionize sputtered secondary neutrals in a nonselective way. To investigate the sputtering and photoionization processes, we examined the dependence of the Laser-SNMS molecular yield on (i) different primary ion bombardment conditions using mono- and polyatomic ions and (ii) the laser parameters wavelength and laser power density. The Laser-SNMS experiments were carried out using Ga+, Bi1+, Bi3+ and Bi5+ as primary ions and two different excimer laser systems for photoionization working at wavelengths of 157 and 193 nm, respectively, with power densities varying between 4 × 106 and 4 × 108 W/cm2. It was found that Bi3+ as primary ion is most suited to investigate organic surfaces. The highest yields could be obtained using a laser wavelength of 157 nm after ionization. Copyright © 2012 John Wiley & Sons, Ltd.