Nitrogen-doped carbon quantum dots: Facile synthesis and application as a “turn-off” fluorescent probe for detection of Hg2+ ions

• Published in: Biosensors & bioelectronics Vol. 55; pp. 83 - 90
• Main Authors: Zhang, Ruizhong, Chen, Wei
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 15.05.2014; Elsevier
• Subjects: Biological and medical sciences; biosensors; Biotechnology; Carbon; Carbon - chemistry; detection limit; Fluorescence; fluorescent dyes; Fluorescent Dyes - analysis; Fluorescent Dyes - chemical synthesis; Folic acid; Fundamental and applied biological sciences. Psychology; Ions - analysis; Ions - chemistry; lakes; Mercury; Mercury - analysis; Mercury - chemistry; metal ions; Molecular Probe Techniques; monitoring; nitrogen; Nitrogen - chemistry; Quantum Dots; Sensor; Spectrometry, Fluorescence - methods; tap water; Water Pollutants, Chemical - analysis; Fluorescence; Quantum dots; Carbon; Mercury; Folic acid; Sensor; Quantum dot; Nanoparticle; Nitrogen; Probe; Detector; Detection; Application

A facile, economical and straightforward hydrothermal strategy is used to prepare highly luminescent nitrogen-doped carbon quantum dots (N-CQDs) by using folic acid as both carbon and nitrogen sources. The as-prepared N-CQDs have an average size of 4.5±1.0nm and exhibit excitation wavelength-depende...