title: Green Synthesis of Bifunctional Fluorescent Carbon Dots from Garlic for Cellular Imaging and Free Radical Scavenging.
abstract: Nitrogen and sulfur codoped carbon dots (CDs) were prepared from garlic by a hydrothermal method. The as-prepared CDs possess good water dispersibility, strong blue fluorescence emission with a fluorescent quantum yield of 17.5%, and excellent photo and pH stabilities. It is also demonstrated that the fluorescence of CDs are resistant to the interference of metal ions, biomolecules, and high ionic strength environments. Combining with low cytotoxicity properties, CDs could be used as an excellent fluorescent probe for cellular multicolor imaging. Moreover, the CDs were also demonstrated to exhibit favorable radical scavenging activity.
authors.affiliation: ‡Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, P.R. China.
authors.forename: Shaojing
authors.initials: S
authors.lastname: Zhao
authors.affiliation: ‡Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, P.R. China.
authors.forename: Minhuan
authors.initials: M
authors.lastname: Lan
authors.affiliation: ‡Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, P.R. China.
authors.forename: Xiaoyue
authors.initials: X
authors.lastname: Zhu
authors.affiliation: ‡Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, P.R. China.
authors.forename: Hongtao
authors.initials: H
authors.lastname: Xue
authors.affiliation: ‡Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, P.R. China.
authors.forename: Tsz-Wai
authors.initials: TW
authors.lastname: Ng
authors.affiliation: §Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China.
authors.forename: Xiangmin
authors.initials: X
authors.lastname: Meng
authors.affiliation: ‡Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, P.R. China.
authors.forename: Chun-Sing
authors.initials: CS
authors.lastname: Lee
authors.affiliation: §Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China.
authors.forename: Pengfei
authors.initials: P
authors.lastname: Wang
authors.affiliation: ‡Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, P.R. China.
authors.forename: Wenjun
authors.initials: W
authors.lastname: Zhang
mesh_terms: D002244:Carbon / Q000737:chemistry*; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D005456:Fluorescent Dyes / Q000737:chemistry*; D016166:Free Radical Scavengers / Q000737:chemistry*; D005737:Garlic / Q000737:chemistry* / Q000378:metabolism; D055772:Green Chemistry Technology; D006358:Hot Temperature; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008856:Microscopy, Fluorescence; D045663:Quantum Dots / Q000737:chemistry* / Q000633:toxicity / Q000648:ultrastructure; D013056:Spectrophotometry, Ultraviolet
chemical_list: D005456:Fluorescent Dyes; D016166:Free Radical Scavengers; D002244:Carbon
keywords: carbon dots; fluorescence; multicolor imaging; radical scavenging activity; reactive oxygen species