A newThe National Institute of Standards and Technology (NIST) material offers companies and researchers a badly needed source of uniform and well-characterized carbon nanotube soot for material comparisons and chemical and toxicity analysis.NIST has issued the world's first reference material for single-wall carbon nanotube soot. Distantly related to the soot in a fireplace or a candle flame, nanotube-laden soot is the primary industrial source of single-wall carbon nanotubes.