Author/Authors :
Zhou، نويسنده , , Jigang and Zhou، نويسنده , , Xingtai and Li، نويسنده , , Ruying and Sun، نويسنده , , Xueliang and Ding، نويسنده , , Zhifeng and Cutler، نويسنده , , Jeffrey and Sham، نويسنده , , Tsun-Kong، نويسنده ,
Abstract :
The electronic structure and the origin of luminescence from blue luminescent carbon nanocrystals (CNC) have been investigated with X-ray absorption near-edge structures (XANES) and X-ray excited optical luminescence (XEOL). XANES shows that nitrogen has been incorporated into the carbon nanocrystals matrix (dominated by sp2 carbon). XEOL from CNC is compared with that from natural diamond and previously reported CVD nanodiamond containing N impurities. The results reveal that N doping is almost certainly responsible for the blue luminescence in carbon nanocrystals. The implication of the results is discussed.
