A tunable high-pass filter for simple and inexpensive size-segregation of sub-10-nm nanoparticles
N. C. Surawski (The Cyprus Institute)
S. Bezantakos (The Cyprus Institute)
K Barmpounis (TU Delft - ChemE/Materials for Energy Conversion and Storage, The Cyprus Institute)
M. C. Dallaston (Imperial College London)
A. Schmidt-Ott (TU Delft - ChemE/Materials for Energy Conversion and Storage, The Cyprus Institute)
George Biskos (The Cyprus Institute)
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Abstract
Recent advanced in the fields of nanotechnology and atmospheric sciences underline the increasing need for sizing sub-10-nm aerosol particles in a simple yet efficient way. In this article, we develop, experimentally test and model the performance of a High-Pass Electrical Mobility Filter (HP-EMF) that can be used for sizing nanoparticles suspended in gaseous media. Experimental measurements of the penetration of nanoparticles having diameters down to ca 1nm through the HP-EMF are compared with predictions by an analytic, a semi-empirical and a numerical model. The results show that the HPEMF effectively filters nanoparticles below a threshold diameter with an extremely high level of sizing performance, while it is easier to use compared to existing nanoparticle sizing techniques through design simplifications. What is more, the HP-EMF is an inexpensive and compact tool, making it an enabling technology for a variety of applications ranging from nanomaterial synthesis to distributed monitoring of atmospheric nanoparticles.
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