A condensation nucleus counter designed for ultrafine particle detection above 3nm diameter

2008 ◽  
pp. 190-193 ◽  
Author(s):  
Patricia B. Keady ◽  
Veryl L. Denler ◽  
Gilmore J. Sem ◽  
Mark R. Stolzenburg ◽  
Peter H. McMurry
Keyword(s):  
Ultrafine Particle ◽  
Condensation Nucleus ◽  
Particle Detection ◽  
Nucleus Counter

Sizing Small Sulfuric Acid Particles with an Ultrafine Particle Condensation Nucleus Counter

2002 ◽  
Vol 36 (5) ◽  
pp. 554-559 ◽  
Author(s):  
D. R. Hanson ◽  
F. L. Eisele ◽  
S. M. Ball ◽  
P. M. McMurry
Keyword(s):  
Sulfuric Acid ◽  
Ultrafine Particle ◽  
Condensation Nucleus ◽  
Nucleus Counter

An improved continuous-flow condensation nucleus counter for use in the stratosphere

1983 ◽  
Vol 14 (3) ◽  
pp. 387-391 ◽  
Author(s):  
James Charles Wilson ◽  
Edmund D. Blackshear ◽  
Jong Ho Hyun
Keyword(s):  
Continuous Flow ◽  
Condensation Nucleus ◽  
Nucleus Counter ◽  
Flow Condensation

Coagulation of fine aerosols

1982 ◽  
Vol 380 (1778) ◽  
pp. 99-118 ◽  
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Size Distribution ◽  
Atmospheric Pressure ◽  
Condensation Nucleus ◽  
Theoretical Limit ◽  
Nucleus Counter ◽  
Constant Radius ◽  
Wall Loss ◽  
Size Distribution Of Particles

The coefficient of coagulation in air at 1 atmosphere (≈ 10 5 Pa) has been measured for particles having mean radii ca . 1.6 and 3.0 nm. Ranges of concentration at constant radius were used so that wall loss could be allowed for. The values obtained were 62 and 113 x 10 -10 cm 3 particle -1 s -1 , respectively, which are 12 and 16 times the values calculated from Fuchs’s incorrect β -theory. At atmospheric pressure the coagulation coefficient is given by the classical Smoluchowski-Cunningham-Knudsen-Weber-Millikan expression when Kn < 20. Further reduction of particle size leads to lower values than the classical which rise to a maximum at Kn ≈ 27 and then fall towards the gas kinetic value which is not attainable at atmospheric pressure. The Nolan-Pollak condensation nucleus counter was reliable for particles of radius down to 1.5 nm, below which particles were missed increasingly down to the theoretical limit, 1.36 nm. A size distribution of particles was derived by using this instrument at different overpressures. The particle radii were measured by diffusion and by electron microscopy.

Inversion of ultrafine condensation nucleus counter pulse height distributions to obtain nanoparticle (∼3–10nm) size distributions

1998 ◽  
Vol 29 (5-6) ◽  
pp. 601-615 ◽  
Author(s):  
Rodney J. Weber ◽  
Mark R. Stolzenburg ◽  
Spyros N. Pandis ◽  
Peter H. McMurry
Keyword(s):  
Pulse Height ◽  
Condensation Nucleus ◽  
Size Distributions ◽  
Nucleus Counter
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