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Formation of aluminium, aluminium nitride and nitrogen clusters via laser ablation of nano aluminium nitride. Laser desorption ionisation and matrix‐assisted laser desorption ionisation time‐of‐flight mass spectrometry
Author(s) -
Panyala Nagender Reddy,
Prysiazhnyi Vadym,
Slavíček Pavel,
Černák Mirko,
Havel Josef
Publication year - 2011
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.5030
Subject(s) - chemistry , analytical chemistry (journal) , desorption , nitride , aluminium , stoichiometry , laser ablation , mass spectrometry , ion , ionization , laser , time of flight mass spectrometry , nitrogen , adsorption , chromatography , optics , physics , organic chemistry , layer (electronics)
Laser Desorption Ionisation (LDI) and Matrix‐Assisted Laser Desorption Ionisation (MALDI) Time‐of‐Flight Mass Spectrometry (TOFMS) were used to study the pulsed laser ablation of aluminium nitride (AlN) nano powder. The formation of Al m + ( m = 1–3), N n + ( n = 4, 5), AlN n + ( n = 1–5, 19, 21), Al m N + ( m = 2–3), Al 3 N 2 + , Al 9 N n + ( n = 5, 7, 9, 11 and 15), Al 11 N n + ( n = 4, 6, 10, 12, 19, 21, 23, and 25), and Al 13 N n + ( n = 25, 31, 32, 33, 34, 35, and 36) clusters was detected in positive ion mode. Similarly, Al m – ( m = 1–3), AlN n – ( n = 1–3, 5), Al m N – ( m = 2, 3), Al 2 N n – ( n = 2–4, 28, 30), N n – ( n = 2, 3), Al 4 N 7 – , Al 8 N n – ( n = 1–6), and Al 13 N n – ( n = 9, 18, 20, 22, 24, 26, 28, 33, 35, 37, 39, 41 and 43) clusters were observed in negative ion mode. The formation of the stoichiometric Al 10 N 10 cluster was shown to be of low abundance. On the contrary, the laser ablation of nano‐AlN led mainly to the formation of nitrogen‐rich Al m N n clusters in both negative and positive ion mode. The stoichiometry of the Al m N n clusters was determined via isotopic envelope analysis and computer modelling. Copyright © 2011 John Wiley & Sons, Ltd.