Nitrogen-doped carbon dots with heterogeneous multi-layered structures

• DOI: 10.1039/c4ra06818a
• Publication Date: 2014-08-12T14:32:36Z
• Authors: Fengyi Du; Jing Yuan; Miaomiao Zhang; Jianan Li; Zhou zhou; Zhang Li; Mulan Cao; Junhui Chen; Lirong Zhang; Xia Liu; Aihua Gong; Wenrong Xu; Qixiang Shao
• Keywords: Passivation; Carbon fibers; Biocompatibility

Photoluminescent carbon dots (CDs) with graphite-like phase structure have been widely reported. Herein, we first report nitrogen-doped (NCDs) heterogeneous multi-layered structures by bottom-up hydrothermal carbonization process. The formation and surface passivation of NCDs was accomplished simultaneously. as-prepared possess stable photoluminescence, solubility in water various functional groups on their surface. XRD results clearly showed that there were two kinds interlayer lattice spaces the prepared NCDs, which corresponded to {002} plane graphite {001} oxide. We further demonstrated good biocompatibility easily quickly internalized cancer cells are particularly suitable for multicolour real-time cellular imaging.