Penglin Ye
A5087646916- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Mass Spectrometry Techniques and Applications
- Polymer Surface Interaction Studies
- Advanced Chemical Sensor Technologies
- Advanced Polymer Synthesis and Characterization
- nanoparticles nucleation surface interactions
- Catalytic Processes in Materials Science
- Toxic Organic Pollutants Impact
- Isotope Analysis in Ecology
- Vehicle emissions and performance
- Indoor Air Quality and Microbial Exposure
- Odor and Emission Control Technologies
- High-Energy Particle Collisions Research
- Wind and Air Flow Studies
- Surface Modification and Superhydrophobicity
- Particle Detector Development and Performance
- Ovarian cancer diagnosis and treatment
- Algal biology and biofuel production
- Atmospheric and Environmental Gas Dynamics
- Dark Matter and Cosmic Phenomena
- Phase Equilibria and Thermodynamics
Aerodyne Research
2017-2025
Fudan University
2020-2024
Carnegie Mellon University
2010-2021
Jiangsu University
2021
Nucleation of aerosol particles from trace atmospheric vapours is thought to provide up half global cloud condensation nuclei. Aerosols can cause a net cooling climate by scattering sunlight and leading smaller but more numerous droplets, which makes clouds brighter extends their lifetimes. Atmospheric aerosols derived human activities are have compensated for large fraction the warming caused greenhouse gases. However, despite its importance climate, nucleation poorly understood. Recently,...
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...
For atmospheric sulfuric acid (SA) concentrations the presence of dimethylamine (DMA) at mixing ratios several parts per trillion by volume can explain observed boundary layer new particle formation rates. However, concentration and molecular composition neutral (uncharged) clusters have not been reported so far due to lack suitable instrumentation. Here we report on experiments from Cosmics Leaving Outdoor Droplets chamber European Organization for Nuclear Research revealing particles...
Atmospheric aerosol formation from biogenic vapors is strongly affected by air pollutants, like NO x , SO 2 and NH 3 .
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...
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. The atmospheric processes under polluted environments involving interactions of anthropogenic pollutants and natural emissions lead to the formation various complex secondary products. Therefore, characterization oxygenated organic compounds in urban areas remains a pivotal issue our understanding evolution carbon. Here, we describe measurements an iodide chemical ionization time-of-flight mass spectrometer installed with Filter Inlet for Gases AEROsols (FIGAERO-I-CIMS) both gas...
Highly efficient recyclable antibacterial magnetite nanoparticles consisting of a magnetic Fe3O4 core with an poly(quaternary ammonium) (PQA) coating were prepared in four-step process. The synthetic pathway included: (1) preparation via coprecipitation Fe2+/Fe3+ the presence alkaline solution; (2) attachment ATRP initiating functionality to surface nanoparticles; (3) surface-initiated atom transfer radical polymerization (ATRP) 2-(dimethylamino)ethyl methacrylate (DMAEMA); and (4)...
Abstract. A recent CLOUD (Cosmics Leaving OUtdoor Droplets) chamber study showed that sulfuric acid and dimethylamine produce new aerosols very efficiently yield particle formation rates are compatible with boundary layer observations. These previously published (NPF) reanalyzed in the present an advanced method. The results show NPF at 1.7 nm more than a factor of 10 faster due to earlier approximations correcting measurements made larger detection threshold. revised agree almost perfectly...
Abstract Binary nucleation of sulfuric acid and water as well ternary involving ammonia are thought to be the dominant processes responsible for new particle formation (NPF) in cold temperatures middle upper troposphere. Ions also important these regions. However, global models presently lack experimentally measured NPF rates under controlled laboratory conditions so at present must rely on theoretical or empirical parameterizations. Here with data obtained European Organization Nuclear...
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...
Atmospheric aerosols exert a substantial influence on climate, ecosystems, visibility, and human health. Although secondary organic (SOA) dominate fine-particle mass, they comprise myriad compounds with uncertain sources, chemistry, interactions. SOA formation involves absorption of vapors into particles, either because gas-phase chemistry produces low-volatility or semivolatile products that partition particles more-volatile organics enter react to form lower-volatility products. Thus, both...
NO x is important for particle growth as it can participate in HOM formation and alter the volatility distribution.
We have investigated the vapor wall loss of semi-volatile organic compounds (SVOCs) in a Teflon smog chamber. studied seven SVOCs with known saturation concentrations, including alkanes (hexacosane, pentacosane, docosane, eicosane, and d62-squalane), an acid (oleic acid), polyol (levoglucosan) single-component binary-component (organic) systems, using ammonium sulfate (AS) seeds to constrain particle loss. coated inorganic particles measured organics from those losses, observing rates...
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. The heterogeneous hydrolysis of dinitrogen pentoxide (N2O5) has a significant impact on both nocturnal particulate nitrate formation and photochemistry the following day through photolysis nitryl chloride (ClNO2), yet these processes in highly polluted urban areas remain poorly understood. Here we present measurements gas-phase N2O5 ClNO2 by high-resolution time-of-flight chemical ionization mass spectrometer (ToF-CIMS) during summer Beijing, China as part Air Pollution Human...
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...
Molecular analyses help to investigate the key precursors and chemical processes of secondary organic aerosol (SOA) formation. We obtained sources molecular compositions in PM2.5 winter Beijing by online offline mass spectrometer measurements. Photochemical aqueous processing were both involved producing SOA during haze events. Aromatics, isoprene, long-chain alkanes or alkenes, carbonyls such as glyoxal methylglyoxal all important precursors. The enhanced formation severe event was...
A novel procedure for the preparation of superhydrophilic surfaces is described. The method employs fabricating surface from a mixture silica nanoparticles (NPs) and polymers containing reactive trimethoxysilyl (TMOS) groups. Suitable include quaternized poly(2-(dimethylamino)ethyl methacrylate) (PQDMAEMA) poly(3-(trimethoxysilyl)propyl (PTMOSPMA). Condensation TMOS groups in deposited film occurs under mild conditions results formation cross-linked polymer−SiO2 nanocomposite coating...
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...
Abstract. Secondary organic aerosol (SOA) formation from biogenic precursors is affected by anthropogenic emissions, which are not well understood in polluted areas. In this study, we accomplished a year-round campaign at nine sites areas located the Pearl River Delta (PRD) region during 2015. We measured typical SOA (BSOA) tracers isoprene, monoterpenes, and β-caryophyllene, as major gaseous particulate pollutants investigated impact of on BSOA formation. The concentrations were range 45.4...