Nitrogen and chlorine co-doped carbon dots as probe for sensing and imaging in biological samples.

ABSTRACT: A facile one-step hydrothermal synthesis approach was proposed to prepare nitrogen and chlorine co-doped carbon dots (CDs) using l-ornithine hydrochloride as the sole precursor. The configuration and component of CDs were characterized by transmission electron microscopy and X-ray photoelectron and Fourier transform infrared spectroscopies. The obtained CDs (Orn-CDs) with a mean diameter of 2.1 nm were well monodispersed in aqueous solutions. The as-prepared CDs exhibited a bright blue fluorescence with a high yield of 60%, good photostability and low cytotoxicity. The emission of Orn-CDs could be selectively and effectively suppressed by Fe³⁺. Thus, a quantitative assay of Fe³⁺ was realized by this nanoprobe with a detection limit of 95.6 nmol l^-1 in the r

SUBMITTER: Li J 

PROVIDER: S-EPMC6366224 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature