Abstract
Instrumental neutron activation analysis (INAA) and prompt gamma neutron activation analysis (PGAA) were used to characterize a variety of single-wall carbon nanotube (SWCNT) materials from different principal production processes, as well as a material containing SWCNTs together with other carbon species, catalyst residues, and trace element contaminants to be issued by the National Institute of Standards and Technology for characterization and distribution as Standard Reference Material SRM 2483 Carbon Nanotube Soot. INAA proved to be well suited for the direct determination of catalyst and contaminant trace elements requiring only minimal sample preparation. PGAA complemented the INAA data in particular with determinations of the light elements. Carbon and hydrogen results provided information on the materials purity and storage properties. Strategies for the quality assurance of the measurements in these new materials were developed. INAA and PGAA data were provided for the value assignment of mass fractions of catalyst and trace elements in the candidate SRM and a systematic overview was obtained of the catalyst and trace element contaminants associated with each of the major production routes.
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Acknowledgments
The authors wish to acknowledge M. R. Winchester and T. A. Butler, Analytical Chemistry Division, NIST, for valuable discussions.
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Zeisler, R., Oflaz, R., Paul, R.L. et al. Use of neutron activation analysis for the characterization of single-wall carbon nanotube materials. J Radioanal Nucl Chem 291, 561–567 (2012). https://doi.org/10.1007/s10967-011-1290-9
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DOI: https://doi.org/10.1007/s10967-011-1290-9