Radial Differential Mobility Analyzer for One Nanometer Particle Classification

We present details on the design, construction, and calibration of a radial differential mobility analyzer suitable for sizing aerosol nanoparticles with mobility diameters as small as one nanometer. Design improvements targeted decreasing the residence time with a concomitant reduction in particle...

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Veröffentlicht in:Aerosol science and technology 2009-01, Vol.43 (1), p.53-59
Hauptverfasser: Brunelli, N. A., Flagan, R. C., Giapis, K. P.
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container_title Aerosol science and technology
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creator Brunelli, N. A.
Flagan, R. C.
Giapis, K. P.
description We present details on the design, construction, and calibration of a radial differential mobility analyzer suitable for sizing aerosol nanoparticles with mobility diameters as small as one nanometer. Design improvements targeted decreasing the residence time with a concomitant reduction in particle agglomeration and diffusional losses to walls. Calibration was performed using aerosolized monodisperse molecular ions. Instrument resolution was found to increase with applied voltage as V 1/2 , indicating that diffusion is broadening the transfer function and reaching a value of ∼7 for the largest molecular ion measured (mobility diameter of 1.47 nm). The mobilities of three molecular ions in the tetra-alkyl ammonium halide homologous series are also reported.
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subjects Aerosols
Calibration
Chemistry
Colloidal state and disperse state
Design
Exact sciences and technology
General and physical chemistry
Ions
Nanoparticles
Physical and chemical studies. Granulometry. Electrokinetic phenomena
title Radial Differential Mobility Analyzer for One Nanometer Particle Classification
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