Physical and Chemical Behavior of Small Particles

本研究是对（1）液滴生长的实验研究 和蒸发动力学，（2）异相成核， 吸附和它们在颗粒上的成膜，以及（3） 用罗马散射法对气溶胶进行化学鉴别。 的 实验将采用电动平衡， 在受控范围内精确已知尺寸的单个颗粒 环境 非常灵敏的测量 颗粒尺寸通常小至0.1 nm，将通过 弹性光散射也提供了信息， 从角度依赖性分析颗粒的组成和结构 散射的光。 这项研究应该有助于理解物理化学过程 与环境污染有关的气溶胶， 用于细粉末生产的气溶胶反应器和颗粒 封装

This research is an experimental study of (1) droplet growth and evaporation kinetics, (2) heterogeneous nucleation, adsorption and their film formation on particles, and (3) chemical identification of aerosols by Roman scattering. The experiments will employ electrodynamic balances to suspend single particles of accurately known size within a controlled environment. Extremely sensitive measurements of changes of particle size, often is small as 0.1 nm, will be detected by elastic light scattering which also gives information on particle composition and structure from the angular dependence of scattered light. The research should help understand physicochemical processes of aerosols which are relevant to environmental pollution, aerosol reactors for fine powder production, and particle encapsulation.