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9. Cannabis sativa-derived carbon dots co-doped with N–S: highly efficient nanosensors for temperature and vitamin B12.

Author

Tiwari, Pranav, Kaur, Navpreet, Sharma, Vinay, Kang, Hyeonggon, Uddin, Jamal, and Mobin, Shaikh M.

Subjects
BIOMIMETIC materials, NANOSENSORS, BIOMIMETIC synthesis, CANNABIS (Genus), VITAMINS, CELL survival, VITAMIN B1, VITAMIN B2
Abstract

With the enhancement in biomimetic and bioinspired synthesis approaches, plant-derived nanostructures provide the most suitable synthesis alternatives in terms of being non-toxic, economical and eco-friendly. The present work focused on Cannabis sativa-derived carbon dots co-doped with nitrogen and sulphur (N–S@CsCD) as a nanosensor. N–S@CsCD exhibited size distribution in the range of 4–6 nm and showed an excitation-independent emission behaviour with an emission wavelength around 414 nm. The XPS spectra confirmed the presence of heteroatom doping by nitrogen and sulphur with the concentrations of 10.71% and 1.94%, respectively. N–S@CsCD showed excellent stability to pH, time and salt concentration. Interestingly, N–S@CsCD exhibited a reversible temperature-responsive fluorescence "turn-off" behaviour. Furthermore, N–S@CsCD showed a selective fluorescence "turn-off" behaviour in the presence of vitamin B12 (VB12), with a limit of detection of 7.87 μg mL−1. The fluorescence lifetimes of N–S@CsCD with and without VB12 were similar, which implied that the sensing behaviour was purely static in nature. Moreover, N–S@CsCD showed biocompatible and non-toxic behaviours with very high cell viability. The fluorescence nature of N–S@CsCD was further evaluated for intracellular imaging. [ABSTRACT FROM AUTHOR]

Published
2019
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35. Cannabis sativa-derived carbon dots co-doped with N–S: highly efficient nanosensors for temperature and vitamin B12.

Author

Tiwari, Pranav, Kaur, Navpreet, Sharma, Vinay, Kang, Hyeonggon, Uddin, Jamal, and Mobin, Shaikh M.

Subjects
*BIOMIMETIC materials, *NANOSENSORS, *BIOMIMETIC synthesis, *CANNABIS (Genus), *VITAMINS, *CELL survival, *VITAMIN B1, *VITAMIN B2
Abstract

With the enhancement in biomimetic and bioinspired synthesis approaches, plant-derived nanostructures provide the most suitable synthesis alternatives in terms of being non-toxic, economical and eco-friendly. The present work focused on Cannabis sativa-derived carbon dots co-doped with nitrogen and sulphur (N–S@CsCD) as a nanosensor. N–S@CsCD exhibited size distribution in the range of 4–6 nm and showed an excitation-independent emission behaviour with an emission wavelength around 414 nm. The XPS spectra confirmed the presence of heteroatom doping by nitrogen and sulphur with the concentrations of 10.71% and 1.94%, respectively. N–S@CsCD showed excellent stability to pH, time and salt concentration. Interestingly, N–S@CsCD exhibited a reversible temperature-responsive fluorescence "turn-off" behaviour. Furthermore, N–S@CsCD showed a selective fluorescence "turn-off" behaviour in the presence of vitamin B12 (VB12), with a limit of detection of 7.87 μg mL−1. The fluorescence lifetimes of N–S@CsCD with and without VB12 were similar, which implied that the sensing behaviour was purely static in nature. Moreover, N–S@CsCD showed biocompatible and non-toxic behaviours with very high cell viability. The fluorescence nature of N–S@CsCD was further evaluated for intracellular imaging. [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
View/download PDF

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