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Abstract
In this work, we report the production of NbSe2 (niobium diselenide) nanotubes formed by irradiating NbSe2 with high doses of electron irradiation. The apparatus used for the irradiation was a 2 MeV Van de Graaff accelerator at the following conditions: voltage 1.3 MeV, current 5 μA, dose rate 25 kGy/min, and total dosage 1000 kGy. These conditions were maintained fixed while irradiation dosage was changed between 100, 250 and 500 Mrad. We observed enormous and very well defined nanotubes with a length of several nm and width of a few nm, which are hollow and capped at one end. As the level of irradiation is increased to 500 Mrad, onion-like structures were observed.
ACKNOWLEDGMENTS
We would like to thank F. Ruiz, G. Vilchis, and E. Aparicio for technical support. D. H. Galván acknowledges Conacyt under Grant 008P-E9506 and DGAPA-UNAM for financial support to spend his sabbatical year in Prof. M. B. Maple's group at the University of California, San Diego. Research at UCSD was supported by the U. S. Department of Energy under Grant No. DE-FGO3-86ER45230.