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Showing papers by "George Biskos published in 2022"




Journal ArticleDOI
TL;DR: In this paper, the authors measured the detection efficiency of the TSI 3007 CPC under temperatures and pressures that differ from standard conditions and showed that the performance of the CPC has a strong temperature dependence in the range of 5-30°C, whereas it is not affected by ambient pressure when this varies between 0.7 and 1.0

1 citations


Journal ArticleDOI
TL;DR: In this paper , the equilibrium geometries of AgnOm+ clusters (n = 1-4; m = 1 -5) were determined using accurate coupled cluster with singles and doubles (CCSD) method, while the stabilization energies were calculated with additional perturbative triples correction.
Abstract: Silver oxide cluster cations (AgnOm+) can readily be produced by a number of methods including atmospheric-pressure spark ablation of pure silver electrodes when trace amounts of oxygen are present in the carrier gas. Here we determine the equilibrium geometries of AgnOm+ clusters (n = 1-4; m = 1-5) using accurate coupled cluster with singles and doubles (CCSD) method, while the stabilization energies are calculated with additional perturbative triples correction (CCSD(T)). Although a number of stable states have been identified, our results show that the AgnOm+ clusters with m = 1 are more stable than those with m ≥ 2 due to the absence of the terminally attached O2 molecule, corroborating recent observations by mass spectrometry. Using the computed structures, we calculate the electrical mobilities of the AgnOm+ clusters and label the values on a respective experimentally determined spectrum in an attempt to better interpret the occurrence of the peaks and troughs in the measurements.

1 citations


Journal ArticleDOI
TL;DR: In this article , the density functional theory (DFT) framework was used to investigate the intermolecular interactions between cyanogen chloride (CNCl) pollutant gas molecule with pristine boron nitride nanotubes (BNNT), Al-doped Boron Nitride nanotsubes (BNAlNT), and carbon borón nitride Nanotubes(BC2NNT).

1 citations


Journal ArticleDOI
TL;DR: In this article , a sharp cut cyclone with an aerodynamic cut-off diameter of 1 μm, when operated at a flow rate of 1 L min-1, was built by 3D-printing and tested against a metallic (aluminum) counterpart having the same design and dimensions.
Abstract: A sharp-cut cyclone with an aerodynamic cut-off diameter of 1 μm, when operated at a flow rate of 1 L min-1, was built by 3D-printing and tested against a metallic (aluminum) counterpart having the same design and dimensions. The penetration efficiency of both cyclones was experimentally determined using quasi-monodisperse aerosol particles having aerodynamic diameters from ca. 100 nm to 2 μm. The aerodynamic cut-off diameter for both cyclones was very similar and in accordance with the expected design value. The penetration efficiency curve of the 3D-printed cyclone was less steep compared to that of its metallic counterpart. This difference is most likely attributed to the higher surface roughness of the inner parts of the 3D-printed cyclone - as also indicated by the greater pressure drop it exhibits compared to the aluminum cyclone when operated at the same flow rate - and not by higher deviations from its design dimensions resulting from the tolerances of the 3D printer. Despite that, the substantially low cost, speed, and ease of manufacturing, make the 3D-printed cyclone a highly promising solution for applications in aerosol metrology.