Dynamic Exchange and Reactivity in Secondary Organic Aerosol

该项目由实验室实验组成，这些实验将有助于更好地了解大气气溶胶的物理和化学性质以及气相和颗粒相物种之间的交换动力学。这项研究对于未来预测气溶胶行为以及大气气溶胶对全球气候和区域空气质量的影响具有重要意义。本项目的目标是确定颗粒物相、物种扩散率和物种挥发性在二次有机气溶胶动态交换和反应性中的作用。实验旨在解决以下目标：(1)更好地了解温度和相对湿度如何影响各种有机物种的扩散系数；(2)确定反应历史，包括颗粒的挥发性有机碳前体，如何影响有机物种的扩散系数；以及(3)建立有机物种的扩散系数与其官能团/分子量之间的结构-函数关系。

This project consists of laboratory experiments that will lead to a better understanding of the physical and chemical properties of atmospheric aerosol and the dynamics of exchange between gas-phase and particle phase species. This research is important for making future predictions of aerosol behavior and the influence of atmospheric aerosol on global climate and regional air quality.The goal of this project is to define the role of particle phase, species diffusivity, and species volatility in the dynamic exchange and reactivity of secondary organic aerosol. Experiments have been designed to address the following objectives: (1) better understand how temperature and relative humidity affect the diffusivity of various organic species; (2) determine how the reactive history, including the volatile organic carbon precursor of the particle, affects the diffusivity of the organic species; and (3) develop structure-function relationships between the diffusivities of organic species and their functional groups/molecular weights.