化学
荧光
量子产额
光漂白
试剂
生物相容性
碳纤维
羟甲基
热液循环
特里斯
量子点
核化学
纳米技术
光化学
化学工程
有机化学
材料科学
工程类
物理
复合数
复合材料
量子力学
生物化学
作者
Ye-Yun Zhang,Ming Wu,Yanqin Wang,Xiwen He,Wen‐You Li,Xisheng Feng
出处
期刊:Talanta
[Elsevier]
日期:2013-12-01
卷期号:117: 196-202
被引量:67
标识
DOI:10.1016/j.talanta.2013.09.003
摘要
Due to their unique optical and biochemical properties, the water-soluble fluorescent carbon dots (CDs) have attracted a lot of attention recently. Here, strong fluorescent carbon dots with excellent quality have been synthesized by the hydrothermal refluxing method using lactose as carbon source and tris(hydroxymethyl) aminomethane (i.e. Tris) as surface passivation reagent. This facile approach was simple, efficient, economical, green without pollution, and allows large-scale production of CDs without any post-treatment. TEM measurements showed that the resulting particles exhibited an average diameter of 1.5 nm. The obtained CDs possess small particle sizes, good stability in a wide range of pH values (pH 3.5-9.5), high tolerance of salt concentration, strong resistibility to photobleaching, and a fluorescent quantum yield up to 12.5%. The CDs were applied to optical bioimaging of HeLa cells, showing low cytotoxicity and excellent biocompatibility.
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