Highly fluorescent N, S-co-doped carbon dots and their potential applications as antioxidants and sensitive probes for Cr (VI) detection

Shen, Jie; Shang, Shuo; Chen, Xiuying; Wang, Dan; Cai, Yan

doi:10.1016/j.snb.2017.03.123

Cited by 178 publications

(102 citation statements)

References 50 publications

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“…These peaks corresponded to C-N-C and (C)3-N bonds, respectively [19,20]. The experimental results were consistent with the FT-IR characterisation [21,22]. Our FT-IR and XPS analysis showed that STC-NPs contain hydroxyl groups, and that the presence of carbonyl groups can be attributed to the multiphoton activity process from various oxygen-containing functional groups [23].…”

Section: Characterisation Of Stc-npssupporting

confidence: 87%

Haemostatic Nanoparticles-Derived Bioactivity of from Selaginella tamariscina Carbonisata

et al. 2020

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High-temperature carbonisation is used to prepare many traditional Chinese medicine charcoal drugs, but the bioactive haemostatic substances of these medicines and their mechanisms are still unknown. This study developed and evaluated nanoparticles (NPs) derived from Selaginella pulvinate Carbonisata (STC) for the first time. The haemostatic effect of STC-NPs prepared at 300, 350, and 400 °C were investigated in mouse tail amputation and liver scratch experiments. STC-NPs obtained at 400 °C had the strongest haemostatic effect, and were accordingly characterised by ultraviolet–visible spectroscopy, fluorescence spectroscopy, Fourier transform infrared spectroscopy, transmission electron microscopy, high resolution transmission electron microscopy, X-ray diffractometry, and X-ray photoelectron spectroscopy. STC-NPs averaged 1.4–2.8 nm and exhibited a quantum yield of 6.06% at a maximum excitation wavelength of 332 nm and emission at 432 nm. STC-NPs displayed low toxicity against mouse monocyte macrophage RAW 264.7 cells by CCK-8 assay, and STC-NP treatment significantly shortened bleeding time in rat and mouse models. Coagulation assays showed that the haemostatic effects of STC-NPs were related to improving the fibrinogen and platelet contents, as well as decreasing the prothrombin time that resulted from stimulating extrinsic blood coagulation and activating the fibrinogen system. The STC-NPs had remarkable haemostatic effects in the tail amputation and liver scratch models; these effects may be associated with the exogenous coagulation pathway and activation of the brinogen system, according to the evaluation of the mouse coagulation parameters. This novel evaluation supports the material basis of STC use in traditional Chinese medicine, and this article is worthy of study by authors of clinical pharmacy.

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Section: Characterisation Of Stc-npssupporting

confidence: 87%

Haemostatic Nanoparticles-Derived Bioactivity of from Selaginella tamariscina Carbonisata

et al. 2020

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“…For instance, Pomelo as a source of organic carbon dots was reported to have a low quantum yield of 1.3% which is ineffective. This has prompted the need to dope with nitrogen and sulfur which yielded 18.7% and is still considered low photoluminescent quantum yield Moreover, boron (p‐type dopant) co‐doping with nitrogen containing CDs favors the nonradiative electron–hole recombination pathways due to incorporation of excess hole which results in a decreased quantum yield, radiative rate, and average decay time of CDs . The CDs with high thermal conductivity is normally due to the size, shape and molecular mechanism, such as micro‐convection related to Brownian motion ,…”

Section: Resultsmentioning

confidence: 99%

“…Carbon dots (CDs) are nanoparticles generated from organic/inorganic carbon sources. CDs were first discovered in the year 2004 when single‐wall carbon nanotubes were electrophoretically purified with several carbon dots qualities such as durability, stability, ease of being functionalized, fluorescence emission, biocompatibility and low toxicity, they possess the capacity to improve the environment and human health . The aforementioned properties and intrinsic characteristics of CDs, have thus made it a needful resource in the fields of scientific research such as; optoelectronics,, environmental pollution and remediation purposes, biosensor bio‐imaging and biomedical applications …”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Fluorescent Carbon Dots from Tapioca

et al. 2019

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This research demonstrates an economical and efficient reduction of carbon foot print. Tapioca powder as a source of organic carbon was utilized in the synthesis of carbon dots through optimization of the synthesis parameters such as temperature, dosage and time. Photoluminescent quantum yield (PLQY) was obtained under the visible region of 340 nm at 34.9%, which was achieved without dopants such as sulfur and nitrogen that are popularly used to increase the value of photoluminescence. The characterization of carbon dots such as FTIR and HrTem, were carried out for the analysis of functional groups, particle sizes (1‐5 nm) and shapes (quasi‐spherical). The high carbon‐carbon bonds and oxygen groups detected in FTIR analysis validates the basis of fluorescence of carbon dots and also presence of hydroxyl (OH), carboxylic acids (COO), and other vital functional groups (C=O, C−O‐C, C−H). These characteristics makes tapioca based carbon dots suitable for application in the fields of environmental studies including sensitive detection and absorbance of pollutants in water and bio imaging in health sciences.

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“…In recent years, CDs, a superior carbon material, has received tremendous attention due to its unique optical, low photobleaching property, physico‐chemical and photochemical properties, good biocompatibility, low toxicity and easy to synthesize . Until now, many efforts have been introduced to enhance the fluorescence property by tuning the optical property of the synthesized CDs .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of nitrogen‐ and phosphorous‐doped carbon dots by the pyrolysis method for iodide and iron(III) sensing

et al. 2017

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A facile and novel strategy to synthesize nitrogen- and phosphorous-doped carbon dots (NPCDs) by single step pyrolysis method is described here. Citric acid is used as carbon source and di-ammonium hydrogen phosphate is used as both nitrogen and phosphorous sources, respectively. Through the extensive study on optical properties, morphology and chemical structures of the synthesized NPCDs, it is found that as-synthesized NPCDs exhibited good excitation-dependent luminescence property, spherical morphology and high stability. The obtained NPCDs are stable in aqueous medium and possess a quantum yield of 10.58%. In this work, a new assay method is developed to detect iodide ions using the synthesized NPCDs. Here, the inner filter effect is applied to detect the iodide ion and exhibited a wide linear response concentration range (10-60 μM) with a limit of detection (LOD) of 0.32 μM. Furthermore, the synthesized NPCDs are used for the selective detection of iron(III) (Fe ) ions and cell imaging. Fe ions sensing assay shows a detection range from 0.2 to 30 μM with a LOD of 72 nM. As an efficient photoluminescence sensor, the developed NPCDs have an excellent biocompatibility and low cytotoxicity, allowing Fe ion detection in HeLa cells.

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Highly fluorescent N, S-co-doped carbon dots and their potential applications as antioxidants and sensitive probes for Cr (VI) detection

Cited by 178 publications

References 50 publications

Haemostatic Nanoparticles-Derived Bioactivity of from Selaginella tamariscina Carbonisata

Haemostatic Nanoparticles-Derived Bioactivity of from Selaginella tamariscina Carbonisata

Synthesis and Characterization of Fluorescent Carbon Dots from Tapioca

Fabrication of nitrogen‐ and phosphorous‐doped carbon dots by the pyrolysis method for iodide and iron(III) sensing

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