To enhance imaging during the TEM a beam alignment need to be done prior to use. A Device for this alignment is really a holey grid. A holey grid is really a TEM grid aid coated with a skinny plastic film along with a stabilizing carbon layer.Bên c?nh nh?ng ?u ?i?m nh? trên thì Decal nh?a trong có m?t h?n ch? khi?n cho nhi?u ng??i ph?i cân nh?