Selective formation of nanographene film without metallic catalyst and its application

我们已经开发了一种新的CVD工艺，该工艺允许在没有金属催化剂的情况下在绝缘体表面上选择性地生长具有约100 nm的畴尺寸的纳米石墨烯。利用光刻法制备氧化铝图形化薄膜，制备了由纳米石墨烯组成的场效应晶体管。所得到的纳米石墨烯器件有望用于高灵敏度化学传感器和生物传感器。通过在介孔氧化硅SBA-15表面包覆几层纳米石墨烯，得到了氮掺杂的有序介孔碳材料。纳米石墨烯膜赋予材料导电性，使得材料易于用作电极。由于氮掺杂，多孔电极显示出通过四电子过程发生的特定ORR活性。这种电化学性能作为燃料电池的催化剂是有希望的。

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.