Abstract Low roll‐off angle, high impalement pressure, and mechanical robustness are key requirements for super‐liquid‐repellent surfaces to realize their potential in applications ranging from gas exchange membranes protective self‐cleaning materials. Achieving these properties is still a challenge with superamphiphobic surfaces, which can repel both water low‐surface‐tension liquids. In addition, fabrication procedures of typically slow expensive. Here, by making use liquid flame spray,...

Abstract Surface engineering can be used to prevent ice accumulation and adhesion in environments that deal with icing problems. One recent approach, slippery liquid infused porous surfaces (SLIPS), comprises a smooth lubricating surface, where lubricant is trapped within the pores of solid material repel various substances, such as water ice. However, it remains unclear whether retain their icephobic characteristics under impact supercooled droplets or repeated freezing melting cycles....

Slippery, liquid-infused porous surfaces offer a promising route for producing omniphobic and anti-icing surfaces. Typically, these are made as coating with expensive time consuming assembly methods or fluorinated films oils. We report on surfaces, which utilizes liquid precursor fed oxygen-hydrogen flame to produce titania nanoparticles deposited directly low-density polyethylene film. This nanocoating, thickness of several hundreds nanometers, is then filled silicone oil. The produced...

TiO2 inverse opal (TIO) structures were prepared by the conventional wet chemical method, resulting in well-formed for photocatalytic activity. The obtained functionalized with liquid flame spray-deposited silver nanoparticles (AgNPs). nanocomposites of TIO and AgNPs extensively characterized various spectroscopies such as UV, Raman, X-ray diffraction, energy-dispersive spectroscopy, photoelectron spectroscopy combined microscopic methods scanning electron microscopy, transmission microscopy...

Abstract. The multi-scheme chemical ionisation inlet 1 (MION1) enables rapid switching between the measurement of atmospheric ions without and neutral molecules using various pressure methods. In this study, we introduce upgraded version, 2 (MION2). new design incorporates enhanced ion optics, resulting in increased reagent concentration, ensuring a robust operation, enabling use multiple methods with same time. order to simplify regular calibration MION2, developed an open-source flow...

Ultrafine particles (<100 nm) in urban air are a serious health hazard not yet fully understood. Therefore, particle number concentration monitoring was recently included the WHO quality guidelines. At present, e.g., EU regulates only regarding emissions of solid larger than 23 nm emitted by vehicles. The aim this study to examine non-volatile fraction sub-23 traffic-influenced environment. We measured 1.4, 3, 10, and May 2018. Volatile compounds were thermally removed sampling line losses...

Particle emissions and secondary aerosol formation from internal combustion engines deteriorate air quality significantly affect human wellbeing health. Both the direct particle of compounds contributing to depend on choices made in selecting fuels, engine technologies, exhaust aftertreatment (EAT). Here we study how catalytic EATs, filtration, fuel these concerning heavy-duty diesel engine. We observed that most advanced EAT decreased fresh mass as much 98% (from 44.7 0.73 mg/kWh) aged...

Particle deposition in the human respiratory tract is considered to have negative effects on health. The lung deposited surface area (LDSA) an important metric developed assess health of particles alveolar region tract. measurement LDSA frequently based detection electrical current carried by diffusion charged particles. Various conversion factors can be used convert electric into concentration with relatively good accuracy up size about 300-600 nm. In this study, we introduce stage-specific...

In this work, the detection characteristics of a large group common pesticides were investigated using multi-scheme chemical ionization inlet (MION) with thermal desorption unit (Karsa Ltd.) connected to an Orbitrap (Velos Pro, Thermo Fisher Scientific) mass spectrometer. Standard pesticide mixtures, fruit extracts, untreated juice, and whole samples inspected. The mixtures contained 1 ng each individual target. Altogether, 115 detected, set different reagents (i.e., dibromomethane,...

Abstract. Chemical ionisation inlets are fundamental instrument components in chemical mass spectrometry (CIMS). However, the sample gas and reagent ion trajectories often understood only a general qualitative manner. Here, we evaluate two atmospheric pressure interface (MION2 Eisele type inlet) with 3D computational fluid dynamics physicochemical models regarding estimate their efficiencies of production, delivery from source volume into ion–molecule mixing region, interaction between ions...

In this review article, a specific flame spray pyrolysis method, Liquid Flame Spray (LFS), is introduced to produce nanoparticles using coflow type hydrogen-oxygen utilizing pneumatically sprayed liquid precursor. This method has been widely used in several applications due its characteristic features, from producing nanopowders and nanostructured functional coatings colouring of art glass generating test aerosols. These special characteristics will be described via the example where LFS...

The quality of aerosol‐produced nanopowders can be impaired by micron‐sized particles formed due to non‐uniform process conditions. Methods evaluate the reliably and fast, preferably on‐line, are important at industrial scales. Here, aerosol analysis methods used determine fractions nanoparticles residuals from poorly volatile precursors. This is accomplished using instruments measure number mass size distributions Liquid Flame Spray‐generated alumina silver produced metal nitrates dissolved...

Abstract Iron oxide nanoparticles were synthesized in a liquid flame spray process from iron(III) nitrate. The choice of chemicals and all other parameters affects the crystallographic phase composition quality material. Adjustment solvent gas flow rates was used to control produced particles. All samples consisted pure maghemite (γ‐Fe 2 O 3 ) or mixture hematite (α‐Fe ). When using alcohols as solvents, maghemite/hematite ratio could be adjusted by changing equivalence that describes...

Chemical ionization (CI) atmospheric pressure interface mass spectrometry is a unique analytical technique for its low detection limits, softness to preserve molecular information, and selectivity particular classes of species. Here, we present fast polarity switching approach highly sensitive online analysis wide range trace species in complex samples using selective CI chemistries high-resolution spectrometry. It achieved by successfully coupling multischeme chemical inlet (MION) an...

The use of filters to control air quality has been implemented widely in all types structures. Unfortunately, risk becoming platforms for the growth bacteria, which can then be dispersed further stream. To combat this, antibacterial materials are being incorporated into filter media. In this work, we tested two routes introducing nanoscale silver containing activated carbon fibers (ACF): first, by adding nanofibers directly fiber fabrication process and second, coating a pre-existing with...

A new instrument, density monitor (DENSMO), for aerosol particle size distribution characterization and monitoring has been developed. DENSMO is operationally simple capable of measuring the effective as well aerodynamic mobility median diameters with a time resolution 1 s, from unimodal distributions. The performed zeroth order analyzer in series low pressure impactor filter stage. operation was investigated sensitivity analysis and, based on results, optimal parameters were determined....

Fabrication of superhydrophobic surfaces in large scale has been high interest for several years, also titanium oxide nanostructures having applied the purpose. Optimizing amount and structure TiO2 material coating will play a key role when considering upscaling. Here, we take look at fabricating surface one-step roll-to-roll pilot process by depositing nanoparticles from Liquid Flame Spray onto moving paperboard substrate. In order to find minimum nanomaterial still sufficient creating...

Silica and titania aerosol nanoparticles are coated with silver through a physical coating process. The is evaporated in tubular furnace flow system condensed on the ceramic carrier particles diameters of approximately 100 nm. temperature gradient optimized order to avoid homogeneous nucleation silver. generated ceramic–silver composite characterized measurements analytical transmission electron microscopy. Two completely different particle morphologies clearly observed, silver-decoration...

In this article, a proof of concept new measurement instrument, differential diffusion analyzer (DDA), is established. The DDA enables the size distribution sub-10 nm aerosol particles, and it can also be used as classifier to separate certain particle from for subsequent analysis. developed technique based on separation different particles. Thus, main advantage compared other methods that charging not required. Simulated experimentally measured transmission efficiencies show diffusion-based...

The inlets of chemical ionisation mass spectrometers are fundamental instrument components in spectrometry (CIMS). However, the sample gas and reagent ion trajectories often understood only a general qualitative manner. Here we evaluate two common atmospheric pressure (MION2 Eisele type inlet) with 3D physico-chemical models regarding their efficiencies production, delivery from source volume into ion-molecule mixing region, interaction between ions target molecules. validated by laboratory...

Abstract. Chemical ionisation inlets are fundamental instrument components in chemical mass spectrometry (CIMS). However, the sample gas and reagent ion trajectories often understood only a general qualitative manner. Here we evaluate two atmospheric pressure (MION2 Eisele type inlet) with computational fluid dynamics 3D physico-chemical models regarding estimate their efficiencies of production, delivery from source volume into ion–molecule mixing region, interaction between ions target...