The size-selected Au (923 ± 23 atoms) cluster soft-landed on amorphous carbon and MgO(100) surface were imaged by transmission electron microscope (TEM) and aberration-corrected scanning transmission electron microscopy (AC-STEM). Au₉₂₃ clusters presents multiplicity geometries on amorphous carbon and epitaxial relationship with MgO(100) surface. It is found that there is a projected size of Au₉₂₃ clusters shrinking when landed on the MgO surface. This is due to the limited observation direction caused by the epitaxial relationship between the facet of Au₉₂₃ clusters and Mg(100) lattice. This study highlights the different observation direction of electron microscopy images of clusters can result in the change of projected area. Such visual size changes can not be neglected in the cluster studies at atomic resolution.

通过透射电子显微镜（TEM）和像差校正扫描透射电子显微镜（AC-STEM）对软着陆在非晶碳和MgO（100）表面上的大小选择的Au（923±23原子）团簇成像。Au ₉₂₃团簇呈现无定形碳上的多重几何形状以及与MgO（100）表面的外延关系。发现当着陆在MgO表面上时，预计Au ₉₂₃团簇的尺寸会缩小。这是由于Au ₉₂₃的小平面之间的外延关系导致观察方向有限团簇和Mg（100）晶格。这项研究强调了簇的电子显微镜图像观察方向的不同会导致投影面积的变化。这样的视觉尺寸变化在原子分辨率的聚类研究中不能忽略。