Novel nitrogen-doped carbon dots prepared under microwave-irradiation for highly sensitive detection of mercury ions

Ghanem, A. A.; Al-Marjeh, Rama Al-Qassar Bani; Atassi, Yomen

doi:10.1016/j.heliyon.2020.e03750

Cited by 28 publications

(13 citation statements)

References 68 publications

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“…Ghanem and team proposed a microwave assisted synthesis strategy for N-doped CDs, where 2,2-dimethyl-1,3-propanediamine and citric acid monohydrate were employed as nitrogen and carbon sources, respectively. In this method, the as-prepared N-doped CDs could display exceptional fluorescent features with higher QY [141]. In another study using microwave irradiation, fluorescent CDs were prepared using glucosamine onto a PEG @ chitosan co-polymer layer.…”

Section: Microwave-assisted Methodsmentioning

confidence: 99%

Carbon Dots: Classification, Properties, Synthesis, Characterization, and Applications in Health Care—An Updated Review (2018–2021)

2021

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Carbon dots (CDs) are usually smaller than 10 nm in size, and are meticulously formulated and recently introduced nanomaterials, among the other types of carbon-based nanomaterials. They have gained significant attention and an incredible interest in the field of nanotechnology and biomedical science, which is merely due to their considerable and exclusive attributes; including their enhanced electron transferability, photobleaching and photo-blinking effects, high photoluminescent quantum yield, fluorescence property, resistance to photo-decomposition, increased electrocatalytic activity, good aqueous solubility, excellent biocompatibility, long-term chemical stability, cost-effectiveness, negligible toxicity, and acquaintance of large effective surface area-to-volume ratio. CDs can be readily functionalized owing to the abundant functional groups on their surfaces, and they also exhibit remarkable sensing features such as specific, selective, and multiplex detectability. In addition, the physico-chemical characteristics of CDs can be easily tunable based on their intended usage or application. In this comprehensive review article, we mainly discuss the classification of CDs, their ideal properties, their general synthesis approaches, and primary characterization techniques. More importantly, we update the readers about the recent trends of CDs in health care applications (viz., their substantial and prominent role in the area of electrochemical and optical biosensing, bioimaging, drug/gene delivery, as well as in photodynamic/photothermal therapy).

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Section: Microwave-assisted Methodsmentioning

confidence: 99%

Carbon Dots: Classification, Properties, Synthesis, Characterization, and Applications in Health Care—An Updated Review (2018–2021)

2021

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“…The importance of developing methods to detect mercury (II) ion (Hg 2+ ) is evident from its environmental abundance and effects on the CNS and endocrine system. Early design of CNDs allowed Hg 2+ did not allow for sensing in anything but water, which excluded any buffers or electrolytes [43,[103][104][105][106][107][108][109][110]. Hg 2+ nanosensing was further developed by Gao et al with a nanohybrid of red-emission QDs and blue-emission CNDs.…”

Section: Dna Detectionmentioning

confidence: 99%

Recent Advances in Carbon Nanodots: A Promising Nanomaterial for Biomedical Applications

Khan

Dunphy

Anike

et al. 2021

IJMS

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Carbon nanodots (CNDs) are an emerging class of nanomaterials and have generated much interest in the field of biomedicine by way of unique properties, such as superior biocompatibility, stability, excellent photoluminescence, simple green synthesis, and easy surface modification. CNDs have been featured in a host of applications, including bioimaging, biosensing, and therapy. In this review, we summarize the latest research progress of CNDs and discuss key advances in our comprehension of CNDs and their potential as biomedical tools. We highlighted the recent developments in the understanding of the functional tailoring of CNDs by modifying dopants and surface molecules, which have yielded a deeper understanding of their antioxidant behavior and mechanisms of action. The increasing amount of in vitro research regarding CNDs has also spawned interest in in vivo practices. Chief among them, we discuss the emergence of research analyzing CNDs as useful therapeutic agents in various disease states. Each subject is debated with reflection on future studies that may further our grasp of CNDs.

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“…Afterward, the PL intensity was measured at excitation wavelength 320 nm and emission wavelength 407 nm. To describe the PL quenching profile of S-CDs with Cr(III) presence, the plot of I 0 /I versus C was performed according to the Stern-Volmer equation (Ghanem et al 2020) based on Eq. ( 2):…”

Section: Sensitivity and Selectivity Of Cr(iii)mentioning

confidence: 99%

Sulfur-doped carbon dots synthesis under microwave irradiation as turn-off fluorescent sensor for Cr(III)

et al. 2021

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This study synthesized a facile and high sensitive fluorescent probe based on sulfur-doped carbon dots (S-CDs) using a one-step microwave irradiation method. The probe exhibited a strong blue emission and a high quantum yield (QY) of 36.40%. In the detection, the presence of trivalent chromium (Cr(III)) strongly quenched the PL intensity of S-CDs by the inner filter effect (IFE) quenching mechanism of Cr(III) on the S-CDs. The S-CDs exhibited good sensitivity to turn-off Cr(III) detection with a linear range concentration of 0–45 μM and a detection limit of 0.17 μM. Furthermore, the proposed method has been successfully applied for Cr(III) detection in natural water samples with the 93.68–106.20% recoveries.

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Novel nitrogen-doped carbon dots prepared under microwave-irradiation for highly sensitive detection of mercury ions

Cited by 28 publications

References 68 publications

Carbon Dots: Classification, Properties, Synthesis, Characterization, and Applications in Health Care—An Updated Review (2018–2021)

Carbon Dots: Classification, Properties, Synthesis, Characterization, and Applications in Health Care—An Updated Review (2018–2021)

Recent Advances in Carbon Nanodots: A Promising Nanomaterial for Biomedical Applications

Sulfur-doped carbon dots synthesis under microwave irradiation as turn-off fluorescent sensor for Cr(III)

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