特集「粒子分析のための新しい顕微鏡技術」
環境制御型電子顕微鏡によるエアロゾルの環境応答のその場観察
2013 年 28 巻 3 号 p. 195-200
詳細
2013 年 28 巻 3 号 p. 195-200
Environmental electron microscopy is a new method that enables in-situ dynamic observation of nano-scale behavior of aerosols and materials. Two types of instruments, environmental transmission electron microscope (ETEM) and environmental scanning electron microscope (ESEM), have been developed and applied to various experiments since the 1990’s. The present article briefly describes the basic principles and instrument systems of ETEM and ESEM, and then shows four examples of ESEM experiments on the hygroscopic behavior of aerosol and artificial small particles, i.e., the influence of nitrate and sulfate on hygroscopicity of Kosa particles, the deliquescence of sea-salt particles, the characteristics of small ice crystals on several kinds of ice nuclei, and the change in hygroscopicity of nitrate particles caused by polymer coating. In conclusion, ETEM and ESEM have a big potential for applications in the fields of aerosol research and engineering.
