State of water and its implications for supersaturated structures in Mg(NO3)2 aerosols |
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| Authors: | LiJun Zhao QingXuan Zeng and YunHong Zhang |
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| Institution: | (1) The Institute of Chemical Physics, Beijing Institute of Technology, Beijing, 100081, China;(2) School of Aerospace Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China |
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| Abstract: | One technique based on the difference spectra was developed to study the state of water in supersaturated Mg(NO3)2 aerosols. The technique could be derived from the observation that the Raman scattering and infrared absorbance cross sections
of molecular vibrations of interest remain practically constant from diluted solutions to supersaturated aerosols. The spectra
of solvated water were obtained and primarily related to the first hydration layers of solute molecules in supersaturated
Mg(NO3)2 aerosols. Based on this investigation, a chain structure was proposed to occur in the supersaturated Mg(NO3)2 aerosols at low relative humidities (RHs).
Supported by National Natural Science Foundation of China (Grant Nos. 20673010 and 20640420450), “111” Project (Grant No.
B07012), and China Postdoctoral Science Foundation (Grant No. 20070410466) |
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| Keywords: | Mg(NO3)2 state of water supersaturated aerosols difference spectra Raman spectroscopy |
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