英语语法分析

Atomic force microscope was used to observe the surface topography with different ssDNA concentration.

利用原子力显微镜观察不同浓度的DNA吸附在金膜上的表面形貌。

With the ssDNA as probe on the electrode surface, we can detect the frequency change and show it on the computer display.

将单链DNA作为探针点在电极表面， 测量晶振频率的改变量，并设计出后续处理电路。

As an important and necessary role in electrochemical DNA biosensors, the immobilization of ssDNA on electrode is of great significance.

作为DNA电化学生物传感器中不可或缺的重要环节，单链DNA在电极上的固定化研究具有十分重要的意义。