On the time-averaging of ultrafine particle number size spectra in vehicular plumes


Ultrafine vehicular particle (<100 nm) number size distributions presented in the literature are mostly averages of long scan-time (∼30 s or more) spectra mainly due to the non-availability of commercial instruments that can measure particle distributions in the <10 nm to 100 nm range faster than 30 s even though individual researchers have built faster (1… (More)


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