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. Author manuscript; available in PMC: 2016 Jan 9.
Published in final edited form as: J Toxicol Environ Health B Crit Rev. 2015;18(0):121–212. doi: 10.1080/10937404.2015.1051611

FIGURE 6. MWCNT aerosols collected in rodent inhalation study.

FIGURE 6

Aerosolized MWCNT collected on filter (A, B) and carbon-coated 200 mesh N: grids (C, D). The MWCNT were aerosolized using an acoustic aerosol generation system (McKinney, Chen, and Frazer 2009) for dry powder generation. Large variations of the airborne structures were observed, ranging from a few single tubes to differently-sized structures of agglomerated CNT to larger tangles resulting in an airborne size distribution as shown in Figure 5. The aerodynamic, settling and diffusional behavior cannot be inferred from these pictures; the large tangle in section D may not be inhalable by rodents and is likely not respirable, but can be estimated from their aerodynamic size distribution. Such experimentally generated MWCNT aerosol for rodent exposures needs to be compared to atmospheres found at workplaces. (See Figures 1, 2).