To enhance imaging while in the TEM a beam alignment needs to be performed ahead of use. A tool for this alignment is really a holey grid. A holey grid is a TEM grid aid coated with a thin plastic movie as well as a stabilizing carbon layer.C?u t?o c?a chúng bao g?m 2 ph?n riêng bi?t ph?n decal và ph?n d?. M?i ph?n l?i ???c chia ra làm 2 l?p: P