Low Temperature Physics: 26, 736 (2000); https://doi.org/10.1063/1.1312401 (8 pages)
Физика Низких Температур: Том 26, Выпуск 9-10 (Сентябрь 2000), c. 992-1000    ( к оглавлению , назад )

Reactions of laser-ablated aluminum atoms with nitrogen during condensation at 10 K. Infrared spectra and density functional calculations for Alx Ny molecular

Lester Andrews, Mingfei Zhou, George V. Chertihin, William D. Bare

Chemistry Department, P. O. Box 400319, University of Virginia, Charlottesville, VA 22904-4319, USA
E-mail: lsa@virginia.edu

Yacine Hannachi

Laboratoire de Physico-Chimie Moleculaire (CNRS UMR 3805), Universite Bordeaux I, 351, Cours de la Liberation, F-33405 Talence, Cedex France

Received November 2, 2000

Аннотация

Laser-ablated aluminum atoms react with dinitrogen on condensation at 10 K to form N3 radical and the subject molecules, which are identified by nitrogen isotopic substitution, further reactions on annealing, and comparison with isotopic frequencies computed by density functional theory. The major AlN3 product is identified from three fundamentals and a statistically mixed nitrogen isotopic octet pattern. The aluminum rich Al2N and Al3N species are major products on annealing to allow diffusion and further reaction of trapped species. This work provides the first experimental evidence for molecular AlxNy species that may be involved in ceramic film growth.

PACS:
81.15.Fg - Laser deposition
82.30.Cf - Atom and radical reactions; chain reactions; molecule-molecule reactions