Volume 90 Issue 1 | p. 18 | Concentrates
Issue Date: January 2, 2012

NIST Develops Nanotube Standard

Department: Government & Policy
News Channels: Materials SCENE, Analytical SCENE
Keywords: single-walled carbon nanotubes, standard reference materials, NIST
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Scanning electron microscope image of single-walled carbon nanotube soot. Image shows an area just larger than 1 µm2.
Credit: Andras Vladar/NIST
Colorized SEM image of NIST single-walled carbon nanotube soot standard reference material.
 
Scanning electron microscope image of single-walled carbon nanotube soot. Image shows an area just larger than 1 µm2.
Credit: Andras Vladar/NIST

NIST has issued the first standard reference material for single-walled carbon nanotubes (SWNTs). The material provides nanotech researchers and companies with well-characterized, homogeneous samples of SWNT powder for use in chemical and toxicity analyses. Each sample has certified values for common impurities, including barium, cerium, chlorine, cobalt, dysprosium, europium, gadolinium, lanthanum, molybdenum, and samarium. SWNT powder is known to vary from one batch to the next, making interlaboratory comparisons of data, such as toxicity measurements, difficult. Many samples are contaminated with other forms of carbon and metal catalysts. “Batch-to-batch, raw carbon nanotube powder samples have varied so much that there is no interlaboratory consistency,” NIST chemical engineer Jeffrey A. Fagan says. NIST’s new material is guaranteed to be uniform from batch to batch.

 
Chemical & Engineering News
ISSN 0009-2347
Copyright © American Chemical Society

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