On anomalous nanoparticle size evolution in glowing wire generator

Fomenko, Elena; Altman, Igor; Agranovski, Igor E.

doi:10.1016/j.nanoso.2021.100693

Cited by 2 publications

(10 citation statements)

References 15 publications

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“…The latter appeared to be a non-independent process on each wire that was affected by the proximity of the other wire. Although our speculations seem reasonable, the experimental approach in Fomenko et al [19] does not allow for a direct isolation of the phenomenon related to the nucleation rate in the system.…”

Section: Introductioncontrasting

confidence: 64%

“…It was calculated using the built-in Origin procedure at all studied conditions (applied voltage, gas flow rate) for both configurations. tralia) were selected, namely, 0.3 and 1 slm; based on our previous experience [19], th were expected to provide the most pronounced effect. The particulate output was char terized by a Scanning Mobility Particle Sizer (SMPS, Model 3080 Classifier along with 3 CPC, TSI Inc., Shoreview, MN, USA).…”

Section: Resultsmentioning

confidence: 99%

“…Some TEM images have been obtained to illustrate the particle morphology produced in the GWG. Figure 3 shows typical shape of molybdenum oxide nanoparticle as reported in [19].…”

Section: Resultsmentioning

confidence: 99%

“…Such arrangements were achieved by turning the electrical terminal holder plate by 90 degrees. Two different flowrates of the carrier gas (>99.9% purity nitrogen, BOC Ltd., North Ryde NSW Australia) were selected, namely, 0.3 and 1 slm; based on our previous experience [19], those were expected to provide the most pronounced effect. The particulate output was characterized by a Scanning Mobility Particle Sizer (SMPS, Model 3080 Classifier along with 3775 CPC, TSI Inc., Shoreview, MN, USA).…”

Section: Methodsmentioning

confidence: 99%

“…In our recent paper [19], the main focus was on the morphology of nanoparticles generated in the GWG. An anomalous nanoparticle size evolution was demonstrated in the modified GWG configuration, in which two parallel wires were employed.…”

Section: Introductionmentioning

confidence: 99%

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Nanoparticle Generation in Glowing Wire Generator: Insight into Nucleation Peculiarities

et al. 2021

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The paper studies nanoparticle formation in a glowing wire generator (GWG), in which the gas carrier flows around heated metal wire, producing aerosols from a vapor released from the surface. The device has been customized, enabling the use of a double-wire in different orientations in regard to the gas flow. Such alterations provided different effective distances between wires enabling investigation of their mutual influence. Concentration of particles produced in the GWG at different parameters (applied voltage and a gas flow) was carefully measured and analysed. Different regimes of a nanoparticle nucleation were identified that resulted from the applied voltage variation and the gas flow direction. In particular, independent nucleation of nanoparticles on both parts of the wire occurred in the wire plane’s configuration perpendicular to the gas flow, whilst dependent nucleation of nanoparticles was observed at a certain specific set of parameters in the configuration, in which the wire plane was parallel to the gas flow. Two corresponding functions were introduced in order to quantify those nucleation regimes and they tend to zero when either independent or dependent nucleation occur. The peculiarities found ought to be considered when designing the multi-wire GWGs in order to further extend the device’s range for industrial applications.

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Section: Introductioncontrasting

confidence: 64%

Section: Resultsmentioning

confidence: 99%

“…Some TEM images have been obtained to illustrate the particle morphology produced in the GWG. Figure 3 shows typical shape of molybdenum oxide nanoparticle as reported in [19].…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nanoparticle Generation in Glowing Wire Generator: Insight into Nucleation Peculiarities

et al. 2021

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Examining Metal Contents in Primary and Secondhand Aerosols Released by Electronic Cigarettes

Kapiamba

Hao

Adom

et al. 2022

Chem. Res. Toxicol.

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The usage of electronic cigarettes (ECs) has surged since their invention two decades ago. However, to date, the health effects of EC aerosol exposure are still not well understood because of insufficient data on the chemical composition of EC aerosols and the corresponding evidence of health risks upon exposure. Herein, we quantified the metals in primary and secondhand aerosols generated by three brands of ECs. By combining aerosol filter sampling and inductively coupled plasma mass spectrometry (ICP-MS), we assessed the mass of metals as a function of EC flavoring, nicotine concentration, device power, puff duration, and aging of the devices. The masses of Cr, Cu, Mn, Ni, Cu, and Zn were consistently high across all brands in the primary and secondhand aerosols, some of which were above the regulated maximum daily intake amount, especially for Cr and Ni with mass (nanograms per 10 puffs) emitted at 117 ± 54 and 50 ± 24 (JUUL), 125 ± 77 and 219 ± 203 (VOOPOO), and 33 ± 10 and 27 ± 2 (Vapor4Life). Our analysis indicates that the metals are predominantly released from the EC liquid, potentially through mechanisms such as bubble bursting or the vaporization of metal−organic compounds. High metal contents were also observed in simulated secondhand aerosols, generally 80−90% of those in primary aerosols. Our findings provide a more detailed understanding of the metal emission characteristics of EC for assessing its health effects and policymaking.

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On anomalous nanoparticle size evolution in glowing wire generator

Cited by 2 publications

References 15 publications

Nanoparticle Generation in Glowing Wire Generator: Insight into Nucleation Peculiarities

Nanoparticle Generation in Glowing Wire Generator: Insight into Nucleation Peculiarities

Examining Metal Contents in Primary and Secondhand Aerosols Released by Electronic Cigarettes

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