To improve imaging while in the TEM a beam alignment ought to be done ahead of use. A tool for this alignment is often a holey grid. A holey grid can be a TEM grid assist coated with a thin plastic film as well as a stabilizing carbon layer.Không b? ?nh h??ng b?i các tác ??ng c?a môi tr??ng, b?t k? ?i?u ki?n th?i ti?t có ?? ?m cao, l?nh hay nh