Global ETD Search
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Showing 1 to 12 of 12 for “"differential mobility analyzer"”.
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Tandem differential mobility analyzer studies and aerosol volatility
… which characterizes the performance of a Differential Mobility Analyzer (DMA) for diffusing particles; the first measurements of the transfer function for a specific type of cylindrical DMA used extensively at the University of Missouri-Rolla (UMR); and the application of a tandem DMA …
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Parameterizing Climate-Relevant Properties of Biofuel and Biomass Particulate Emissions Based on Combustion Conditions
I also used a differential mobility analyzer to first determine the size distribution of the fresh aerosols. I then used a humidifying tandem differential mobility analyzer to determine the growth of fresh and aged aerosols under different humidity conditions (from 20% and 83% RH). Soot from wood …
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Isolation of ambient aerosols of known critical supersaturation: the differential critical supersaturation separator (DSCS)
… Sc, within a narrow, user-specified, range. This Differential Critical Supersaturation Separator (DScS) is designed to supply one or more particle size and/or composition analyzers to permit the direct examination of the factors that influence the activation properties of ambient aerosols. The …
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Alle 2 nm:n kokoisten klusterien tuottaminen ja karakterisointi
… oli korkean resoluution Herrmann DMA (differential mobility analyzer), joka valitsee näytteestä halutun kokoiset hiukkaset ja sen resoluutio on noin 20. DMA:n jälkeen näyte johdettiin kolmelle mittalaitteelle, jotka mittasivat rinnakkain. Massaspektrometri, APi-TOF (atmospheric pressure …
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Volatility properties of the ambient and laboratory generated aerosol
… enthalpy of vaporization using volatility tandem differential mobility analyzer (VTDMA) measurement of single components aerosol. The performed the a numerical evaluation of a new method to estimate uncertainties and sensitivity. Also this new technique was tested with adipic acid aerosol and …
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Experimental Studies on Nucleation, Nanoparticle's Formation and Polymerization from the Vapor Phase
… dependent. By coupling the LVCC chamber with the differential mobility analyzer, size-selected nanoparticles have been prepared in the vapor phase. The prepared nanoparticles were characterized by different techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD), …
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Cloud condensation nucleus activity comparison of dry- and wet-generated mineral dust aerosol : the significance of soluble material
… wet and dry particle generation coupled to a differential mobility analyzer (DMA) and cloud condensation nuclei counter, the critical activation of the clay mineral particles as cloud condensation nuclei is characterized. Electron microscopy (EM) is used to determine non-sphericity in particle …
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In Situ Characterization of Optical Absorption by Carbonaceous Aerosols: Calibration and Measurement
… both particle diameter measurements by the differential mobility analyzer (DMA) and light absorption measurements by PA. Appropriate reference materials were explored for the calibration/validation of both measurements. The light absorption of carbonaceous aerosols was also investigated to …
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Particle formation in ambient mass spectrometry
… couples a light scattering particle sizer with a differential mobility analyzer for particle detection and elucidation with the capability for measuring particle sizes in the range of 10 nm to 20 μm. The particle sizing system was used to investigate particle formation that is associated with …
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Aerosol Route Synthesis and Applications of Doped Nanostructured Materials
… was carried out by integrating a tandem differential mobility analyzer: TDMA) set up with the flame reactor synthesis system. Both singly- and doubly- charged nanoparticles were measured, with the charged fractions dependent on particle mobility and dopant concentration. A theoretical …
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Sub 2 nm Particle Characterization in Systems with Aerosol Formation and Growth
… and growth: (1) using a high-resolution differential mobility analyzer (DMA) to measure the size distributions of sub 2 nm particles generated from high-temperature aerosol reactors, and (2) analyzing the physical and chemical pathways of aerosol formation during combustion.</p> <p>Part. …
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Modeling study of the hygroscopic, optical, and cloud-activation properties of aerosols from biofuel combustion
… of RH were measured with a Hygroscopic-Tandem Differential Mobility Analyzer (H-TDMA) and fitted with the κ-Köhler model. I explored several mixing rules to model the aerosol mixing state and estimate the effective refractive index of the humidified OC aerosol. There was agreement between …