化学
检出限
荧光
亚硝酸盐
水溶液
碳纤维
离子
猝灭(荧光)
分析化学(期刊)
无机化学
光化学
色谱法
硝酸盐
有机化学
复合材料
物理
材料科学
复合数
量子力学
作者
Jayasmita Jana,Hye Jin Lee,Jin Suk Chung,Mun Ho Kim,Seung Hyun Hur
标识
DOI:10.1016/j.aca.2019.06.064
摘要
This study examined the efficiency of pH-dependent, fluorescent carbon dots for the sensing of hazardous anions in aqueous media and cell imaging. The nitrite anion, an important water-soluble element for environmental and biological systems, requires continuous monitoring because a high concentration can affect the systems severely. The as-synthesized carbon dots efficiently detected the nitrite anion in aqueous solution through a fluorescent 'Turn Off' phenomenon. The quenching mechanism was investigated through proper microscopic and spectroscopic studies. The limit of detection and linear detection range were 7.9 nM and 2.3μM-7.7 mM, respectively. The sensitivity was tested with different water samples. In a parallel experiment, the as-synthesized carbon dots were used as a cell-imaging probe for HeLa cells, highlighting their potential in different biological studies.
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