globalchange  > 气候变化事实与影响
DOI: 10.1016/j.atmosenv.2015.10.051
Scopus记录号: 2-s2.0-84946414957
论文题名:
Images and properties of individual nucleated particles
作者: Németh Z; , Pósfai M; , Nyiro-Kósa I; , Aalto P; , Kulmala M; , Salma I
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 123
起始页码: 166
结束页码: 170
语种: 英语
英文关键词: Atmospheric nucleation ; Electron microscopy
Scopus关键词: Atmospheric aerosols ; Electron energy levels ; Electron energy loss spectroscopy ; Electron microscopy ; Electron scattering ; Electrons ; Electrostatic precipitators ; Energy dissipation ; Nucleation ; Atmospheric aerosol particles ; Bright fields ; Electrical mobility ; Individual particles ; Nucleated particles ; Nucleation and growth ; Particle growth ; Particle number concentration ; High resolution transmission electron microscopy ; ammonium sulfate ; graphene ; nanosphere ; organic compound ; sulfate ; aerosol ; diameter ; electron ; nucleation ; particle size ; soot ; spatiotemporal analysis ; sulfate ; tar ; transmission electron microscopy ; Article ; atmosphere ; electron beam ; electron energy loss spectroscopy ; electron microscopy ; Hungary ; priority journal ; scanning electron microscopy ; static electricity ; surface property ; transmission electron microscopy ; Budapest ; Hungary
Scopus学科分类: Environmental Science: Water Science and Technology ; Earth and Planetary Sciences: Earth-Surface Processes ; Environmental Science: Environmental Chemistry
英文摘要: Atmospheric aerosol particles were collected in Budapest, Hungary in April-June onto lacey Formvar substrates by using an electrostatic precipitator during the beginning phase of the particle growth process in ten nucleation and growth events. Median contribution of the nucleated particles - expressed as the concentration of particles with a diameter between 6 and 25 nm to the total particle number concentration - was 55%, and the median electrical mobility diameter of the particles was approximately 20 nm. The sample was investigated using high-resolution transmission electron microscopy (TEM) and electron energy-loss spectroscopy. Major types of individual particles such as soot, sulphate/organic and tar ball particles were identified in the sample. In addition, particles with an optical diameter range of 10-30 nm were also observed. They clearly differed from the other particle types, showed homogeneous contrast in the bright-field TEM images, and evaporated within tens of seconds when exposed to the electron beam. They were interpreted as representatives of freshly nucleated particles. © 2015 Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81399
Appears in Collections:气候变化事实与影响

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作者单位: Institute of Chemistry, Eötvös University, P.O. Box 32, Budapest, Hungary; Department of Earth and Environmental Sciences, University of Pannonia, P.O. Box 158, Veszprém, Hungary; MTA-PE Air Chemistry Research Group, P.O. Box 158, Veszprém, Hungary; Department of Physics, University of Helsinki, P.O. Box 64, Helsinki, Finland

Recommended Citation:
Németh Z,, Pósfai M,, Nyiro-Kósa I,et al. Images and properties of individual nucleated particles[J]. Atmospheric Environment,2015-01-01,123
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