Self-assembly of nitrogen-doped carbon dots anchored on bacterial cellulose and their application in iron ion detection

Lv, Pengfei; Yao, Yixin; Li, Dawei; Zhou, Huimin; Naeem, Muhammad Awais; Feng, Quan; Huang, Jia; Cai, Yibing

doi:10.1016/j.carbpol.2017.04.086

Cited by 82 publications

(38 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The Fe 3 + interacted electrostatically with the negatively charged asCQDs and easily chelated with hydroxy and amino funtional groups. [33,34] The combination of Fe 3 + and binding sites facilitated non-radiative electron transfer from the excited state of asCQDs to the d-orbital of transition-metal ions. [4,32] As shown in Figure 4a,b,w ith the increasing concentration of Fe 3 + ,t he PL intensity of asCQDs and tcCQDs decreased gradually.Alinear relationship ranged from 0t o1 00 mm and indicateds tatic rathert han dynamic quenching took place, which corroborated by the linear Stern-Volmer plot as shown in Figure 4c.G enerally,t he static quenching process refers to the formation of nonfluorescent complexes by combining ground-statef luorescencem olecules with quencher molecules.…”

Section: Resultsmentioning

confidence: 99%

A Precisely Assembled Carbon Source to Synthesize Fluorescent Carbon Quantum Dots for Sensing Probes and Bioimaging Agents

Qiao

Luo

et al. 2018

Chemistry A European J

View full text Add to dashboard Cite

A broad range of carbon sources have been used to fabricate varieties of carbon quantum dots (CQDs). However, the majority of these studies concern the influence of primary structures and chemical compositions of precursors on the CQDs; it is still unclear whether or not the superstructures of carbon sources have effects on the physiochemical properties of the synthetic CQDs. In this work, the concept of molecular assembly is first introduced into the design of a new carbon source. Compared with the tropocollagen molecules, the hierarchically assembled collagen scaffolds, as a new carbon source, immobilize functional groups of the precursors through hydrogen bonds, electrostatic attraction, and hydrophobic forces. Moreover, the accumulation of functional groups in collagen self-assembly further promotes the covalent bond formation in the obtained CQDs through a hydrothermal process. Both of these two chemical superiorities give rise to high quality CQDs with enhanced emission. The assembled collagen scaffold-based CQDs with heteroatom doping exhibit superior stability, and could be further applied as effective fluorescent probes for Fe detection and cellular cytosol imaging. These findings open a wealth of possibilities to explore more nanocarbons from precursors with assembled superstructures.

show abstract

Section: Resultsmentioning

confidence: 99%

A Precisely Assembled Carbon Source to Synthesize Fluorescent Carbon Quantum Dots for Sensing Probes and Bioimaging Agents

Qiao

Luo

et al. 2018

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…UV–vis absorption spectrum of the as‐synthesized NPCDs is shown in Figure (a). Two broad characteristic absorption bands at 228 nm and 342 nm corresponding to the π‐π * transition of electrons in aromatic moieties and n ‐π * transition of C = O group, respectively . The broad characteristic absorption peak at 342 nm in the UV–vis absorption spectra of the synthesized NPCDs originates due to the trapping of large amounts of excitation energy for n ‐π * transition of C = O group exhibiting large amount of emission at 360 nm excitation .…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2017

View full text Add to dashboard Cite

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.

show abstract

“…Due to the formation of a two-phase Janus system, the obtained hydrogel exhibited distinct chemical and physical properties at each phase (surface). Lv et al 142 incorporated nitrogen-doped carbon dots into the three-dimensional network of BNC in situ using culture media containing 1% carbon dots (Fig. 14).…”

Section: Nanocellulose-based Hydrogels With Inorganic Nanoparticlesmentioning

confidence: 99%

“…Particularly for wound healing materials, some other requirements are addressed by nanocellulose-containing nanocomposites which are also important for providing a suitable were taken under a fluorescent lamp; photos were taken in a dark room by using a 350 nm ultraviolet lamp as an excitation source: (B) the "Indicator" pattern; (C) the "spheroid" pattern. 142 Copyright 2017, Elsevier.…”

Section: Biomedicinementioning

confidence: 99%

Nanocellulose nanocomposite hydrogels: technological and environmental issues

et al. 2018

View full text Add to dashboard Cite

show abstract

Self-assembly of nitrogen-doped carbon dots anchored on bacterial cellulose and their application in iron ion detection

Cited by 82 publications

References 32 publications

A Precisely Assembled Carbon Source to Synthesize Fluorescent Carbon Quantum Dots for Sensing Probes and Bioimaging Agents

A Precisely Assembled Carbon Source to Synthesize Fluorescent Carbon Quantum Dots for Sensing Probes and Bioimaging Agents

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

Nanocellulose nanocomposite hydrogels: technological and environmental issues

Contact Info

Product

Resources

About