Recent content by Chengjun Li

Thank you for your reply. Yes, the pure mechanical frequency is two times that of the generator. But the experiment was done in a vacuum environment. There is no dielectric. And not only I observed the vibration as close as the left structure, but also I saw the same phenomenon as far as the...

Thank you for your reply! I think my previous statement of the problem is not clear enough. Please allow me to describe my experiment in detail. First we fabricate a chip, a MEMS chip, mainly used for mechanical testing of nanostructure. The inner design of the chip is shown below. R1 I...

Hi, I find an interesting related to electric field when doing experiment. I put a chip which has the following circuit inside Scanning Electron Microscopy(SEM), an electron beam is irradiating on R1. The AC source is isolated from Earth by using a capacitor C1 and resistor R3 in the...

We all know that wherever there is potential difference in space, there will be electric field there. So if we set a power supply to output 1V, but we connect the two leads to nothing, just leave them in air, the ends of the two leads have a potential difference of 1V, there will be a electric...