Fluorescence sensing of Cu2+ ion and imaging of fungal cell by ultra-small fluorescent carbon dots derived from Acacia concinna seeds
- Authors
- Bhamore, Jigna R.; Jha, Sanjay; Park, Tae Jung; Kailasa, Suresh Kumar
- Issue Date
- Dec-2018
- Publisher
- Elsevier B.V.
- Keywords
- Ultra-small fluorescent CDs; Acacia concinna seeds; Cu2+ ion; Fluorescence spectrometer; Penicillium sp. cells
- Citation
- Sensors and Actuators, B: Chemical, v.277, pp 47 - 54
- Pages
- 8
- Journal Title
- Sensors and Actuators, B: Chemical
- Volume
- 277
- Start Page
- 47
- End Page
- 54
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/3467
- DOI
- 10.1016/j.snb.2018.08.149
- ISSN
- 0925-4005
- Abstract
- In this work, we explored the use of Acacia concinna seeds (shikakai) as a green precursor for the fabrication of ultra-small fluorescent carbon dots (CDs). The synthesized ultra-small fluorescent CDs sense only Cu2+ ion through strong chelation between Cu2+ ion and organic groups of CDs. As a result, highly selective fluorescence “turn-off” probe was developed for assay of Cu2+ ion, causing remarkable fluorescence intensity quenching, which has ability to sense Cu2+ ion even at 0.0043 μM (4.3 nM). Furthermore, the ultra-small fluorescent CDs act as biocompatible probes for multicolour imaging of fungal (Penicillium sp.) cells. The practical application of the developed sensor was demonstrated by assaying of Cu2+ ion in spiked water samples, which confirms their significant analytical and bioanalytical applications. © 2018 Elsevier B.V.
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