石墨纳米橡皮
Graphite Nanoeraser
摘要：
本文介绍了一种从高取向热解石墨中清除中等尺寸（5~ 50 nm）杂质的方法。电子束沉积导致石墨烯和石墨表面上的碳质材料的连续增加，其难以通过常规技术去除。观察到使用石墨纳米擦除器的直接机械擦拭可大幅减少污染物的量。在机械去除污染物后，石墨表面能够在剪切后自缩回，表明范德华接触键合恢复。由于接触键合提供了一个清洁度水平的指示，通常只能在高品质的洁净室，我们讨论了潜在的应用在制备超净表面。
英文摘要：
We present here a method for cleaning intermediate-size (5~50nm) contamination from highly oriented pyrolytic graphite. Electron beam deposition causes a continuous increase of carbonaceous material on graphene and graphite surfaces, which is difficult to remove by conventional techniques. Direct mechanical wiping using a graphite nanoeraser is observed to drastically reduce the amount of contamination. After the mechanical removal of contamination, the graphite surfaces were able to self-retract after shearing, indicating that van der Waals contact bonding is restored. Since contact bonding provides an indication of a level of cleanliness normally only attainable in a high-quality clean-room, we discuss potential applications in preparation of ultraclean surfaces.
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