Sophia Brilke
A5045766641- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Atmospheric and Environmental Gas Dynamics
- Mass Spectrometry Techniques and Applications
- Advanced Chemical Sensor Technologies
- Dark Matter and Cosmic Phenomena
- Wind and Air Flow Studies
- Laser-induced spectroscopy and plasma
- Catalytic Processes in Materials Science
- nanoparticles nucleation surface interactions
- Free Radicals and Antioxidants
- Analytical chemistry methods development
- Chemical Thermodynamics and Molecular Structure
- Toxic Organic Pollutants Impact
- Coagulation and Flocculation Studies
- Various Chemistry Research Topics
- Radiation Therapy and Dosimetry
- Advanced Chemical Physics Studies
- Thermal Radiation and Cooling Technologies
- Analytical Chemistry and Sensors
- Radioactive element chemistry and processing
- Chemical Safety and Risk Management
University of Vienna
2017-2024
IMS Nanofabrication (Austria)
2022
Goethe University Frankfurt
2016-2020
Universität Innsbruck
2017-2019
Grimm Aerosol Technik (Germany)
2019
Abstract About half of present-day cloud condensation nuclei originate from atmospheric nucleation, frequently appearing as a burst new particles near midday 1 . Atmospheric observations show that the growth rate often accelerates when diameter is between one and ten nanometres 2,3 In this critical size range, are most likely to be lost by coagulation with pre-existing 4 , thereby failing form typically 50 100 across. Sulfuric acid vapour involved in nucleation but too scarce explain...
Abstract Atmospheric aerosols and their effect on clouds are thought to be important for anthropogenic radiative forcing of the climate, yet remain poorly understood 1 . Globally, around half cloud condensation nuclei originate from nucleation atmospheric vapours 2 It is that sulfuric acid essential initiate most particle formation in atmosphere 3,4 , ions have a relatively minor role 5 Some laboratory studies, however, reported organic without intentional addition acid, although...
Atmospheric aerosol formation from biogenic vapors is strongly affected by air pollutants, like NO x , SO 2 and NH 3 .
A list of authors and their affiliations appears at the end paper New-particle formation is a major contributor to urban smog1,2, but how it occurs in cities often puzzling3. If growth rates particles are similar those found cleaner environments (1-10 nanometres per hour), then existing understanding suggests that new should be rapidly scavenged by high concentration pre-existing particles. Here we show, through experiments performed under atmospheric conditions CLOUD chamber CERN, below...
Significance Aerosol particles can form and grow by gas-to-particle conversion eventually act as seeds for cloud droplets, influencing global climate. Volatile organic compounds emitted from plants are oxidized in the atmosphere, resulting products drive particle growth. We measure growth biogenic vapors with a well-controlled laboratory setup over wide range of tropospheric temperatures. While higher temperatures lead to increased reaction rates concentrations highly molecules, lower allow...
Faster than expected Iodine species are one of only a handful atmospheric vapors known to make new aerosol particles, which play central role in controlling the radiative forcing climate. He et al. report experimental evidence from CERN Cosmics Leaving Outdoor Droplets, or CLOUD, chamber demonstrating that iodic acid and iodous rapidly form particles can compete with sulfuric pristine regions. Science , this issue p. 589
Significance A mechanism for the formation of atmospheric aerosols via gas to particle conversion highly oxidized organic molecules is found be dominant aerosol process in preindustrial boundary layer over land. The inclusion this a global model raises baseline concentrations and could lead reduction 27% estimates anthropogenic radiative forcing.
To better understand the role of aromatic hydrocarbons in new-particle formation, we measured particle-phase abundance and volatility oxidation products following reaction with OH radicals. For this used thermal desorption an iodide-adduct Time-of-Flight Chemical-Ionization Mass Spectrometer equipped a Filter Inlet for Gases AEROsols (FIGAERO-ToF-CIMS). The measurements confirm that toluene naphthalene can contribute to initial growth newly formed particles. Toluene-derived (C7) have similar...
Abstract. Highly oxygenated organic molecules (HOMs) contribute substantially to the formation and growth of atmospheric aerosol particles, which affect air quality, human health Earth's climate. HOMs are formed by rapid, gas-phase autoxidation volatile compounds (VOCs) such as α-pinene, most abundant monoterpene in atmosphere. Due their abundance low volatility, can play an important role new-particle (NPF) early aerosols, even without any further assistance other low-volatility sulfuric...
Abstract. In the present-day atmosphere, sulfuric acid is most important vapour for aerosol particle formation and initial growth. However, growth rates of nanoparticles (<10 nm) from remain poorly measured. Therefore, effect stabilizing bases, contribution ions impact attractive forces on molecular collisions are under debate. Here, we present precise rate measurements uncharged particles 1.8 to 10 nm, performed atmospheric conditions in CERN (European Organization Nuclear Research)...
NO x is important for particle growth as it can participate in HOM formation and alter the volatility distribution.
Terpenes are emitted by vegetation, and their oxidation in the atmosphere is an important source of secondary organic aerosol (SOA). A part this can proceed through autoxidation process, yielding highly oxygenated molecules (HOMs) with low saturation vapor pressure. They therefore contribute, even absence sulfuric acid, to new particle formation (NPF). The understanding mechanism its kinetics still far from complete. Here, we present a mechanistic kinetic analysis mass spectrometry data...
Abstract. Nucleation of atmospheric vapours produces more than half global cloud condensation nuclei and so has an important influence on climate. Recent studies show that monoterpene (C10H16) oxidation yields highly oxygenated products can nucleate with or without sulfuric acid. Monoterpenes are emitted mainly by trees, frequently together isoprene (C5H8), which the highest emission all organic vapours. Previous have shown suppresses new-particle formation from monoterpenes, but cause this...
Abstract. New particle formation (NPF) is a significant source of atmospheric particles, affecting climate and air quality. Understanding the mechanisms involved in urban aerosols important to develop effective mitigation strategies. However, NPF rates reported polluted boundary layer span more than 4 orders magnitude, reasons behind this variability are subject intense scientific debate. Multiple vapours have been postulated participate NPF, including sulfuric acid, ammonia, amines...
We use a real-time temperature-programmed desorption chemical-ionization mass spectrometer (FIGAERO–CIMS) to measure particle-phase composition and volatility of nucleated particles, studying pure α-pinene oxidation over wide temperature range (−50 °C +25 °C) in the CLOUD chamber at CERN. Highly oxygenated organic molecules are much more abundant particles formed higher temperatures, shifting compounds toward O/C lower intrinsic (300 K) volatility. find that biogenic nucleation growth...
Abstract. It was recently shown by the CERN CLOUD experiment that biogenic highly oxygenated molecules (HOMs) form particles under atmospheric conditions in absence of sulfuric acid, where ions enhance nucleation rate 1–2 orders magnitude. The HOMs were produced from ozonolysis α-pinene at 5 ∘C. Here we extend this study to compare molecular composition positive and negative HOM clusters measured with pressure interface time-of-flight mass spectrometers (APi-TOFs), three different...
Abstract. The formation of secondary particles in the atmosphere accounts for more than half global cloud condensation nuclei. Experiments at CERN CLOUD (Cosmics Leaving OUtdoor Droplets) chamber have underlined importance ions new particle formation, but quantifying their effect remains challenging. By using a novel instrument setup consisting two nanoparticle counters, one them equipped with an ion filter, we were able to further investigate ion-related mechanisms formation. In autumn...
Ions enhance the formation rate of atmospheric aerosol particles, which play an important role in Earth’s radiative balance. Ion-induced nucleation involves stepwise accretion neutral monomers onto a molecular cluster containing ion, helps to stabilize against evaporation. Although theoretical frameworks exist calculate collision coefficients between molecules and ions, they need be experimentally confirmed, ideally under atmospherically relevant conditions around 1000 ion pairs cm−3. Here,...
Abstract. Condensation particle counters (CPCs) are crucial instruments for detecting sub-10 nm aerosol particles. Understanding the detection performance of a CPC requires thorough characterization under well-controlled laboratory conditions. Besides size seed particles, chemical interactions between working fluid and particles also influence activation efficiencies. However, common materials used characterizations not chosen with respect to vapor molecules by default. Here, we present...
Abstract. A new method for size-resolved chemical analysis of nucleation mode aerosol particles (size range from ∼10 to ∼30 nm) is presented. The Thermal Desorption Differential Mobility Analyzer (TD-DMA) uses an online, discontinuous principle. are charged, a specific size selected by differential mobility and they collected on filament electrostatic precipitation. Subsequently, the sampled mass evaporated in clean carrier gas analyzed ionization spectrometer. Gas-phase measurements...
Isoprene affects new particle formation rates in environments and experiments also containing monoterpenes.
Molecular singly charged clusters generated by electrospray sources are commonly used for calibration measurements of ultrafine Condensation Particle Counters (CPCs) in the sub-2 nm size range. This technique has been limited to smallest clusters. In this study, we a bipolar source combining two electrosprays opposite polarities generate ammonium salts dissolved acetonitrile, i.e., tetra-heptyl bromide (THABr) and tetra-butyl iodide (TBAI) A high-resolution UDMA acts as classifier positively...
Abstract. In this study the impact of humidity on heterogeneous nucleation n-butanol onto hygroscopic and nonabsorbent charged neutral particles was investigated using a fast expansion chamber commercial continuous flow type condensation particle counters (CPCs). More specifically, we measured activation probability sodium chloride (NaCl) silver (Ag) nanoparticles by as condensing liquid with size analyzing nuclei counter (SANC). addition, cutoff diameters regular butanol-based CPCs for both...
Abstract. Atmospheric particle size distributions were measured in Paphos, Cyprus, during the A-LIFE (absorbing aerosol layers a changing climate: ageing, lifetime and dynamics) field experiment from 3 to 30 April 2017. The newly developed differential mobility analyser train (DMA-train) was deployed for first time an atmospheric environment direct measurement of nucleation mode range between 1.8 10 nm diameter. DMA-train set-up consists seven channels, which five are set fixed diameters two...
Abstract. In the present-day atmosphere, sulfuric acid is most important vapour for aerosol particle formation and initial growth. However, growth rates of nanoparticles (