Replace with 100% acetonitrile for

Replace with 100% acetonitrile for 15-20 minutes per step. DRYING: put the pure Acetonitrile in the vacuum stage of the vacuum coater, acetonitrile and sample were rapidly cooled and frozen in vacuum (freezing temperature was (45 ° c) to form ice-like solid. The frozen Acetonitrile is then vacuum sublimed for about 30 minutes until the sample is dried. After the sample is dried, it is pasted on the sample table. For uncoated samples, it is necessary to directly observe the adhesion with conductive adhesive. For coated samples, you can use glue or universal glue instead, and fine powder, fiber samples can be double-sided adhesive paper.