Selective formation of nanographene film without metallic catalyst and its application

我们开发了一种新的CVD工艺，可以在没有金属催化剂的情况下在绝缘体表面选择性地生长纳米石墨烯，其畴尺寸约为100 nm。利用光刻法制备氧化铝图案膜，制备了由纳米石墨烯构成的场效应晶体管。该纳米石墨烯器件有望应用于高灵敏度的化学传感器和生物传感器。通过在介孔二氧化硅SBA-15表面包覆几层纳米石墨烯，制备了氮掺杂有序介孔碳材料。纳米石墨烯薄膜赋予材料导电性，使材料易于用作电极。由于氮的掺杂，多孔电极通过四电子过程显示出特定的ORR活性。这种电化学性能很有希望作为燃料电池的催化剂。

We have developed a novel CVD process which allows selective growth of nanographene with a domain size of about 100 nm on a surface of insulator without metallic catalyst. Using alumina pattering film prepared by lithography, the field effect transistor that is composed of nanographene is prepared. The resulting nanograhene device is expected for the applications of highly sensitive chemical sensor and bio-sensor. Nitrogen-doped ordered mesoporous carbon materials were obtained by coating mesoporous silica SBA-15 with a few layers of nanographene. The nanographene film endows the materials with electrical conductivity making the materials apt to be used as electrodes. Thanks to the nitrogen doping, the porous electrode shows a specific ORR activity taking place through a four-electron process. Such electrochemical performance is promising as a catalyst for fuel cell.