التفاصيل البيبلوغرافية
| العنوان: |
Biosynthesized Highly Stable Au/C Nanodots: Ideal Probes for the Selective and Sensitive Detection of Hg2+ Ions. |
| المؤلفون: |
Venkateswarlu, Sada, Govindaraju, Saravanan, Sangubotla, Roopkumar, Kim, Jongsung, Lee, Min-Ho, Yun, Kyusik |
| المصدر: |
Nanomaterials (2079-4991); Feb2019, Vol. 9 Issue 2, p245-1, 1p |
| مصطلحات موضوعية: |
X-ray photoelectron spectroscopy, WATER pollution, METAL detectors, HEAVY ions, METAL ions, PLANT genes |
| مستخلص: |
The enormous ongoing industrial development has caused serious water pollution which has become a major crisis, particularly in developing countries. Among the various water pollutants, non-biodegradable heavy metal ions are the most prevalent. Thus, trace-level detection of these metal ions using a simple technique is essential. To address this issue, we have developed a fluorescent probe of Au/C nanodots (GCNDs-gold carbon nanodots) using an eco-friendly method based on an extract from waste onion leaves (Allium cepa-red onions). The leaves are rich in many flavonoids, playing a vital role in the formation of GCNDs. Transmission electron microscopy (TEM) and Scanning transmission electron microscopy-Energy-dispersive X-ray spectroscopy (STEM-EDS) elemental mapping clearly indicated that the newly synthesized materials are approximately 2 nm in size. The resulting GCNDs exhibited a strong orange fluorescence with excitation at 380 nm and emission at 610 nm. The GCNDs were applied as a fluorescent probe for the detection of Hg2+ ions. They can detect ultra-trace concentrations of Hg2+ with a detection limit of 1.3 nM. The X-ray photoelectron spectroscopy results facilitated the identification of a clear detection mechanism. We also used the new probe on a real river water sample. The newly developed sensor is highly stable with a strong fluorescent property and can be used for various applications such as in catalysis and biomedicine. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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