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石墨烯的制備方法及應用

2012-12-29 來源:微波射頻網 字號:

一層石墨烯集成

 

圖10 可完全卷曲的納米發電機的輸出特性.
(a) 發電機的輸出極性與電流大小;(b)卷曲與非卷曲時的輸出電流

5

在短短的幾年間,石墨烯以其具有的優異性能及各種潛在的應用前景,得到快速發掘和開發. 與此同時,人們需要大量高質量、結構完整的石墨烯材料. 這就要求提高或進一步完善現有制備工藝的水平,探索新的制備路徑. 微機械法顯然不能滿足未來工業化的要求,直接剝離法能制備高質量的石墨烯,但產率太低、耗時太長; 化學氣相沉積法可以制備出大面積且性能優異的石墨烯薄膜材料,但現有的工藝不成熟以及成本較高都限制了其大規模應用,因此還需進一步探索、完善. 氧化還原法雖然能夠以相對較低的成本制備出大量的石墨烯,但即使被強還原劑還原后,石墨烯的原始結構也并不能完全恢復(特別是經過共價修飾后的石墨烯),而使其電子結構及晶體的完整性均受到嚴重的破壞,一定程度上限制了其在某些領域(如精密的微電子領域)中的應用. 因此,如何大量、低成本制備出高質量的石墨烯材料仍是未來研究的一個重點. 此外,由于表面修飾能改善或豐富石墨烯的各種性能,也應該關注如何更好的修飾,特別是非共價修飾,進一步提高石墨烯各方面性能,促進其器件化、工業化、商品化的進程。

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作者:無機光電0901 3090707020 黃飛飛

主題閱讀:石墨烯
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