To optimize imaging during the TEM a beam alignment needs to be executed before use. A Resource for this alignment is a holey grid. A holey grid is actually a TEM grid aid coated with a skinny plastic movie in addition to a stabilizing carbon layer.Chi ti?t D?ch v? in tem mã v?ch ch?t l??ng t?i X??ng In Nhãn Mác D?ch v? in tem mã v?ch ch?t l??n