Nitrogen-doped carbon dots derived from polyvinyl pyrrolidone and their multicolor cell imaging
2014; IOP Publishing; Volume: 25; Issue: 20 Linguagem: Inglês
10.1088/0957-4484/25/20/205604
ISSN1361-6528
AutoresHui Ding, Peng Zhang, Tianyi Wang, Jilie Kong, Huan‐Ming Xiong,
Tópico(s)Quantum Dots Synthesis And Properties
ResumoNitrogen-doped carbon dots (N-CDs) with a high quantum yield of 19.6% were prepared by calcining polyvinyl pyrrolidone (PVP, K-30), and then modified with 4,7,10-trioxa-1,13-tridecanediamine. The as-prepared N-CDs exhibited excitation-dependent and pH-sensitive photoluminescence. Transmission electron microscopy and Raman spectra demonstrated the graphitic structure of the N-CDs. Fourier transform infrared spectroscopy and x-ray diffraction studies revealed successful passivation and the presence of hydrophilic groups on the surface. Importantly, such modified quantum dots acted as good multicolor cell imaging probes due to their excellent fluorescent properties, low cytotoxicity and fine dispersity.
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