Production, Dynamic Behavior and Measurement of Small Aerosol Particles

就进一步推进气溶胶研究涉及的各项课题共同进行了全面的研究，主要课题总结如下：1。细颗粒的产生对于气态物质成核过程的理论研究，还存在气体分子粘接概率等亟待解决的关键问题，以及实验技术的改进。制备粒度均匀的细颗粒是细颗粒工业应用的基本要求之一，第(2)项和第(3)项所开发的组合技术将是进一步研究的有用方法。四极电池成功地将单个粒子悬浮在电池中，这一技术有望在气溶胶的基础实验研究中发挥重要作用，如粒子的大小、物理和物理化学表征以及动力学研究。需要进一步的技术改进来扩展它，使其适用于更大尺寸范围的颗粒。在激光照射下，观察到吸光粒子的一些特殊行为。粒子加热和被加热粒子的动力学被认为对阐明这些现象具有特别重要的意义。粒子的测量：全面研究了光散射技术在气溶胶粒子测量中的应用。角散射测量与开尔文细胞动态光散射（光子相关光谱，PCS）相结合被证实是最适用于细颗粒原位测量的方法。pc中使用的数据反演技术还需要进一步改进。研究了大气气溶胶粒子诱导x射线发射（PIXE）方法，并将其应用于宇治、大阪和维也纳地区采样的空气中微粒的元素分析，目前正在审查当地特征。将继续就这一项目开展进一步的联合工作。在这次联合工作中讨论的另一个重要主题是大气气溶胶对全球气候的贡献，目前正在考虑继续进行联合研究计划。少

Comprehensive studies were carried out jointly on various items involved in further advancement of aerosol research, and the main topics are summarized as follows ;1. Production of fine particlesAs for the theoretical study of nucleation processes from gaseous matter, there still remain essential unsolved problems such as the sticking probability of gas molecules, as well as the improvement in experimental techniques. Production of homogeneous sized fine particles is one of the essential requirement for industrial use of fine particles, and the combined techniques developed in items 2) and 3) will be useful method for further research.2. Dynamics of particlesA quadrupole cell was successfully utilized for levitating a single particle in a cell, and this technique is expected to be extremely useful for basic experimental research of aerosols such as sizing, physical and physico-chemical characterization and dynamics study of particles. Further technical ements will be needed to extend i … More ts applicability to more wider size range of particles. Some peculiar behaviors were observed for light-absorbing particles under the irradiation of laser beam. Particle heating and dynamics of heated particles are thought of special importance to elucidate these phenomena.3. Measurement of particlesApplication of light scattering techniques to sizing of aerosol particles was studied comprehensively. Angular scattering measurement in combination with Kelvin cell dynamic light scattering (photon correlation spectroscopy, PCS) were confirmed to be most useful for in-situ measurement of fine particles. Further improvement is still required for data inversion technique used in PCS.4. Atmospheric aerosolsParticle induced X-ray Emission (PIXE) method was studied applied to elemental analysis of airborne particulates sampled at the areas of Uji, Osaka and Vienna, and the local features are now being examined. Further joint works will be continued with this item. Another important topic discussed during this joint work was the contribution of atmospheric aerosols to the global climate, and a continuing joint research program is now under consideration. Less