Abstract: | A rigid peripheral clamp with an annular heater is used to bond layered crystals to grids with a thermoplastic adhesive. The layered crystals are subsequently cleaved with adhesive tape while bonded to the grid. The final layered crystal thin film covering a grid opening is exposed only to room air and is free from adhesive or fluid contamination. The results of preparation of several layered crystals, including muscovite mica, molybdenite, and talc, are described. |