Journal
ANALYTICA CHIMICA ACTA
Volume 1079, Issue -, Pages 212-219Publisher
ELSEVIER
DOI: 10.1016/j.aca.2019.06.064
Keywords
Carbon dot; Fluorescence; 'Turn Off' phenomenon; Nitrite ion; Sensing; Cell-imaging
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Funding
- Basic Science Research Program through the National Research Foundation of Korea - Ministry of Science, ICT and Future Planning [2019R1A2B5B02069683]
- National Research Foundation of Korea [2019R1A2B5B02069683] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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 2.3 mu M-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. (C) 2019 Elsevier B.V. All rights reserved.
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