Progress in microwave-assisted synthesis of quantum dots (graphene/carbon/semiconducting) for bioapplications: a review

Singh, Rajesh Kumar; Kumar, Rajesh; Singh, Dinesh; Savú, Raluca; Moshkalev, Stanislav A.

doi:10.1016/j.mtchem.2019.03.001

Cited by 200 publications

(77 citation statements)

References 328 publications

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“…This method is widely accepted because it can be easily controlled, simple, economic, energy-efficient and results in non-toxic NCDs [ 37 ]. However, the requirement of high temperature, lengthy process time, low quantum yield and necessarily require high temperature furnace, which is not practically available in laboratories are some major drawbacks [ 36 , 38 ]. Ramar et al developed NCDs with Pomelo juice ( Citrus maxima or Citrus grandis ) by one-step hydrothermal method at 200 °C for 7 h which proved efficient as photocatalytic agent [ 26 ].…”

Section: Ncds: Synthesis Methods and Modificationsmentioning

confidence: 99%

Natural carbon-based quantum dots and their applications in drug delivery: A review

Nair

Haponiuk

Thomas

et al. 2020

Biomedicine & Pharmacotherapy

204

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Graphical abstract Various NCDs with antimicrobial, anticancer and neurodegenerative drug delivery applications. a) Pleurotus species, b) Hylocereus undatus , c) Curcuma longa L., d) Manilkara zapota (L.) P. Royen , e) Banana leaf, f) Carica papaya , g) Ocimum Sanctum , h) Foeniculum vulgare Mill seeds, i) Azadirachta indica , j) Aloe vera (L.) Burm.f.

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Section: Ncds: Synthesis Methods and Modificationsmentioning

confidence: 99%

Natural carbon-based quantum dots and their applications in drug delivery: A review

Nair

Haponiuk

Thomas

et al. 2020

Biomedicine & Pharmacotherapy

204

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“…7,[21][22][23][24] Among these hybridizing with graphene based materials can give improved performance because of their large internal surface area for anchoring MOFs materials and excellent electrical conductivity for electron transport. [25][26][27][28][29][30][31] For example, Yaghi et al 18 showed as hybridizing MOFs with graphene has potential to enhance electrode materials for supercapacitor application. Zhou et al 32 reported Ni-MOFs@GO as pseudocapacitors materials with a capacitance of 1457.7 F g À1 at a current density of 1 A g À1 .…”

Section: Introductionmentioning

confidence: 99%

A 2D metal–organic framework/reduced graphene oxide heterostructure for supercapacitor application

Beka

et al. 2019

RSC Adv.

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“…Noteworthy, the post-processing method must be adjusted to CQDs' potential use, such as cell labelling or bioimaging, and such factors as the type of the raw material used or the synthesis method must be taken under consideration. A very popular approach is the application of polymers as modifying agents, which can be poly(anions), poly(cations), and neutral, depending on the specified needs [24,[33][34][35]. Polyethylene glycol enables preparation of CQDs which will not cause immune response, whereas positively-charged polyethyleneimine enables obtainment of nanodots capable of cell membrane integrity disruption resulting in more efficient cell transfection.…”

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confidence: 99%

Smart, Tunable CQDs with Antioxidant Properties for Biomedical Applications—Ecofriendly Synthesis and Characterization

et al. 2020

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Carbon quantum dots (CQDs) are nanoobjects of a size below 10 nm. Due to their favorable features, such as tunable luminescence, unique optical properties, water solubility, and lack of cytotoxicity, they are willingly applied in biomedicine. They can be obtained via bottom-up and top-down methods. However, to increase their quantum yield they must undergo post-processing. The aim of the following research was to obtain a new type of CQDs modified with a rhodamine b derivative to enhance their fluorescence performance without biocompability deterioration. For their preparation glucose was used as a precursor and four different carbonizing agents which affected semi-and final products luminescence properties. The ready nanomaterials were investigated over their chemical structure by FTIR and NMR, whereas morphology was investigated by the TEM method. Their optical properties were determined by UV-VIS spectroscopy. Fluorescence behavior, photo-and pH-stability, as well as solvatochromism showed their applicability in various biomedical applications due to the controlled properties. The samples exhibited excellent antioxidant activity and lack of cytotoxicity on L929 mouse fibroblasts. The results showed that proposed strategy enables preparation of the superior nanomaterials with outstanding luminescence properties such as quantum yield up to 17% which can be successfully applied in cell labelling, bioimaging, and theranostics.Molecules 2020, 25, 736 2 of 18 can release cadmium ions leading to cell death. Importantly, it occurred that quantum dots may undergo certain modifications resulting in the change of their surface or chemical structure [27,28]. Finally, their preparation is expensive. Therefore, there was a need for a novel type of quantum dots which would be suitable for biomedical applications. In 2004, a new type of carbon-based materials was accidentally obtained during nanotube purification [29]. Until then, numerous types of carbon quantum dots (CQDs) have been obtained with various possible applications due to their very attractive properties, such as luminesce, good water solubility, high photostability, resistance to photobleaching or photoblinking, possibility, chemical inertness and, finally, lack of toxicity and biocompability [1][2][3]. Furthermore, CQDs' region of photoluminescence is very broad, starting in the ultraviolet and ending in the near-infrared. Although, until now, the luminescence behavior of carbon nanodots is still not fully clear, it is believed that crucial role plays two factors, namely, that the quantum size is below 10 nm and surface defects which may act as excitation energy traps. Interestingly, CQDs can successfully act as both electron donors and acceptors [2][3][4].CQDs can be prepared from various resources, such as peels (mango, orange, banana, pineapple, onion, seaweed etc.), meat, grains, nuts, or vegetable by-products, which makes them a low-cost material [30,31]. Currently, these nanomaterials are widely applied in drug delivery, gene delivery, biosensing, bioimag...

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Progress in microwave-assisted synthesis of quantum dots (graphene/carbon/semiconducting) for bioapplications: a review

Cited by 200 publications

References 328 publications

Natural carbon-based quantum dots and their applications in drug delivery: A review

Natural carbon-based quantum dots and their applications in drug delivery: A review

A 2D metal–organic framework/reduced graphene oxide heterostructure for supercapacitor application

Smart, Tunable CQDs with Antioxidant Properties for Biomedical Applications—Ecofriendly Synthesis and Characterization

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