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Isomers of gallium arsenide cluster ions

✍ Scribed by Lihong Wang; L.P.F. Chibante; F.K. Tittel; R.F. Curl; R.E. Smalley

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
282 KB
Volume
194
Category
Article
ISSN
0009-2614

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✦ Synopsis

Gallium arsenide duster ions were generated by laser vaporization in a supersonic nozzle, trapped in a Fourier transform ioncyclotron resonance mass spectrometer, and allowed to react with NH3 forming addition complexes with the cluster cations. With excess NH3, GaxAsy(NH3)~ + with the same GaAs composition (x+y) was observed with several values ofz. This observation of different numbers of chemisorbed NH3 molecules at completion is explained in terms of the existence of multiple isomers of positive GaAs clusters. Negative GaxAsy clusters were found to be inert toward NH3.

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