STM/SEM correlative study of facetted gold

We have integrated an STM unit with a conventional scanning electron microscope in order to perform STM–SEM correlative microscopy. The method is applied to an electrochemically facetted gold sample, which provides a surface structure suitable for this study. We discuss the factors which are relevant in order to obtain a quantitative resolution of the topographic surface structure, by taking advantage of the performances of both techniques. In particular we suggest the use of the STM height distribution as the best parameter for STM/SEM correlation. Finally, from the STM data we deduce that the main process during electrochemical etching is the formation of (111) faces.     

ECP系统列车总线电源设计

根据ECP系统列车总线电源的设计需求,选择推挽正激和单端反激两种DC／DC电路拓扑作为列车总线电源的电路拓扑,并设计了列车总线电源的控制程序,最后进行了地面联调试验。试验结果表明设计的列车总线电源满足ECP系统的工作要求。