51.3 Why must we study physics The scanning tunneling microscope 样品 反馈电路 81.3 Why must we study physics lodine atoms on the surface of platinum observed by the scanning tunneling microscope 1616 §1.3 Why must we study physics The scanning tunneling microscope §1.3 Why must we study physics Iodine atoms on the surface of Platinum observed by the scanning tunneling microscope