Fluorescently tuned nitrogen-doped carbon dots from carbon source with different content of carboxyl groups

Journal Article · Sat Aug 01 00:00:00 EDT 2015 · APL Materials

DOI:https://doi.org/10.1063/1.4928028· OSTI ID:22499237

Wang, Hao; Wang, Yun; Dai, Xiao; Zou, Guifu ^[1]; Gao, Peng; Zhang, Ke-Qin; Du, Dezhuang ^[2]; Guo, Jun ^[3]

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1. College of Physics, Optoelectronics and Energy and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006 (China)
2. National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123 (China)
3. Testing and Analysis Center, Soochow University, Suzhou 215123 (China)

In this study, fluorescent nitrogen-doped carbon dots (NCDs) were tuned via varying the sources with different number of carboxyl groups. Owing to the interaction between amino and carboxyl, more amino groups conjugate the surface of the NCDs by the source with more carboxyl groups. Fluorescent NCDs were tuned via varying the sources with different content of carboxyl groups. Correspondingly, the nitrogen content, fluorescence quantum yields and lifetime of NCDs increases with the content of carboxyl groups from the source. Furthermore, cytotoxicity assay and cell imaging test indicate that the resultant NCDs possess low cytotoxicity and excellent biocompatibility.

• OSTI ID: 22499237
• Journal Information: APL Materials, Vol. 3, Issue 8; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2166-532X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON
DOPED MATERIALS
FLUORESCENCE
INTERACTIONS
NITROGEN
SURFACES
TOXICITY