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Presence of photoluminescent carbon dots in Nescafe (R) original instant coffee: Applications to bioimaging
Jiang, Chengkun1,2; Wu, Hao2; Song, Xiaojie2; Ma, Xiaojun2; Wang, Jihui1; Tan, Mingqian2
关键词Carbon Dots Nescafe (r) Original Instant Coffee Photoluminescent Bioimaging
刊名TALANTA
2014-09-01
DOI10.1016/j.talanta.2014.01.046
127页:68-74
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Analytical
研究领域[WOS]Chemistry
关键词[WOS]NANOPARTICLES ; LUMINESCENCE ; BRIGHT ; PROBES ; SOOT
英文摘要The presence of the carbon dots (C-dots) in food is a hotly debated topic and our knowledge about the presence and the use of carbon dots (C-dots) in food is still in its infancy. We report the finding of the presence of photoluminescent (PL) C-dots in commercial Nescafe instant coffee. TEM analysis reveals that the extracted C-dots have an average size of 4.4 nm. They were well-dispersed in water and strongly photoluminescent under the excitation of ultra-violet light with a quantum yield (QY) about 5.5%, which were also found to possess clear upconversion PL properties. X-ray photoelectron spectroscopy characterization demonstrates that the C-dots contain C, O and N three elements with the relative contents ca. 30.1, 62.2 and 7.8%. The X-ray diffraction (XRD) analysis indicates that the C-dots are amorphous. Fourier-transform infrared (FTIR) spectra were employed to characterize the surface groups of the C-dots. The C-dots show a pH independent behavior by varying the pH value from 2 to 11. The cytotoxicity study revealed that the C-dots did not cause any toxicity to cells at a concentration as high as 20 mg/mL. The C-dots have been directly applied in cells and fish imaging, which suggested that the C-dots present in commercial coffee may have more potential biological applications. (C) 2014 Published by Elsevier B.V.
语种英语
WOS记录号WOS:000338620300009
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/145637
专题中国科学院大连化学物理研究所
作者单位1.Dalian Polytech Univ, Sch Biol & Food Engn, Dalian 116034, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Div Biotechnol, Dalian 116023, Peoples R China
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GB/T 7714
Jiang, Chengkun,Wu, Hao,Song, Xiaojie,et al. Presence of photoluminescent carbon dots in Nescafe (R) original instant coffee: Applications to bioimaging[J]. TALANTA,2014,127:68-74.
APA Jiang, Chengkun,Wu, Hao,Song, Xiaojie,Ma, Xiaojun,Wang, Jihui,&Tan, Mingqian.(2014).Presence of photoluminescent carbon dots in Nescafe (R) original instant coffee: Applications to bioimaging.TALANTA,127,68-74.
MLA Jiang, Chengkun,et al."Presence of photoluminescent carbon dots in Nescafe (R) original instant coffee: Applications to bioimaging".TALANTA 127(2014):68-74.
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