Barkay Zahava, Teller Amit, Ganor Eliezer, Levin Zev, Shapira Yoram
Wolfson Applied Materials Research Center, Tel-Aviv University, Ramat Aviv, Israel.
Microsc Res Tech. 2005 Oct;68(2):107-14. doi: 10.1002/jemt.20241.
Atomic force microscopy (AFM) and scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS) have been used for both morphological and elemental mass analysis study of atmospheric particles. As part of the geometrical particle analysis, and in addition to the traditional height profile measurement of individual particles, AFM was used to measure the volume relative to the projection area for each particle separately, providing a particle shape model. The element identification was done by the EDS analysis, and the element mass content was calculated based on laboratory calibration with particles of known composition. The SEM-EDS mass measurements from two samples collected at 150 and 500 m above the surface of the Mediterranean Sea were found to be similar to mass calculations derived from the AFM volume measurements. The AFM results show that the volume of most of the aerosols that were identified as soluble marine sulfate and nitrate aerosol particles can be better estimated using cylindrical shapes than spherical or conical geometry.
原子力显微镜（AFM）和带有能量色散光谱的扫描电子显微镜（SEM-EDS）已被用于大气颗粒物的形态和元素质量分析研究。作为几何颗粒物分析的一部分，除了对单个颗粒进行传统的高度轮廓测量外，AFM还用于分别测量每个颗粒相对于投影面积的体积，从而提供颗粒形状模型。通过EDS分析进行元素识别，并根据对已知成分颗粒的实验室校准计算元素质量含量。在地中海上空150米和500米处采集的两个样本的SEM-EDS质量测量结果与从AFM体积测量得出的质量计算结果相似。AFM结果表明，对于大多数被鉴定为可溶性海洋硫酸盐和硝酸盐气溶胶颗粒的气溶胶，使用圆柱形比球形或锥形几何形状能更好地估计其体积。
