Facile Access to White Fluorescent Carbon Dots toward Light-Emitting Devices

Mao, Li-Hua; Tang, Wenqi; Deng, Zhengyan; Liu, Sisi; Wang, Cai‐Feng; Chen, Su

doi:10.1021/ie500602n

Cited by 167 publications

(116 citation statements)

References 48 publications

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“…When the X-rays interacts with a crystallite C-dots sample, the constructive interference is produced, and these diffracted X-rays are then detected, processed, and counted, revealing the average structure of C-dots [86,87,89,[130][131][132][133][134][135][136]. Figure 3(A) displays a typical XRD pattern of polyethylenimine (PEI) functionalized C-dots (C-dots-PEI) derived from microwave-assisted pyrolysis of glycerol in the presence of branched PEI [86].…”

Section: X-ray Diffractionmentioning

confidence: 99%

“…Tian et al [90] firstly reported the utility of 13 CNMR spectroscopy in liquid state to identify the carbon states in a C-dots sample derived from candle shoot (Figure 8). Followed by this, numerous efforts have been contributed to using NMR spectroscopy in both solid state and liquid state for C-dots characterization [21,38,56,85,109,115,135,143,[159][160][161][162][163][164]. In addition, NMR has been proved to be powerful in the establishment of the 8 Journal of Nanomaterials chemical alterations that happened to the surface modifiers during carbonization.…”

Section: Nuclear Magnetic Resonancementioning

confidence: 99%

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Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Gong

Liu

et al. 2017

Journal of Nanomaterials

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Carbon nanodots (C-dots) are recently discovered fluorescent carbon nanoparticles with typical sizes of <10 nm. The C-dots have been reported to have excellent photophysical and chemical characteristics. In recent years, the advances in the development and improvement in C-dots synthesis, characterization, and applications are burgeoning. In this review, we introduce the most commonly used techniques for the characterization of C-dots. The characterization techniques for C-dots are briefly classified, described, and illustrated with applied examples. In addition, the analytical separation methods for C-dots (including electrophoresis, chromatography, density gradient centrifugation, differential centrifugation, solvent extraction, and dialysis) are included and discussed according to their analytical characteristics. The review concludes with an outlook towards the future developments in the characterization and the analytical separation of C-dots. The comprehensive overview of the characterization and the analytical separation techniques will safeguard people to use each technique more wisely.

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Section: X-ray Diffractionmentioning

confidence: 99%

Section: Nuclear Magnetic Resonancementioning

confidence: 99%

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Gong

Liu

et al. 2017

Journal of Nanomaterials

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“…The so obtained C-dots possessed a fluorescence QY of 3.8%. Mao et al 31 developed photoluminescent C-dots with glycerol through a one-stage pyrolysis of poly (acrylic acid). The various structures and optical features of the C-dots were altogether examined.…”

Section: Xrdmentioning

confidence: 99%

Carbon Quantum Dots: Synthesis, Characterization and Biomedical Applications

Singh

Arora

Dhiman

et al. 2018

tjps

149

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ÖZ INTRODUCTIONLuminescent semiconductor nano crystals of size 1-10 nanometers with rich surface chemistry and unique optical properties are called quantum dots (QDs). Different compounds belonging to group 2 to 4 and 3 to 5, e.g., Ag, Cd, Zn, Hg, Se, Ln, Pb, P, and Te lead to the formation of QDs. These have become an obligatory tool for traceable targeted delivery, biomedical research, and different therapy applications. Longterm fluorescence imaging and the detection of the properties of these nanoparticles (NPs) have made them imperative in biomedical research. Different properties of QDs such as resistance to photobleaching, superior signal brightness, larger absorption coefficients, light emission, and contemporaneous excitation of different fluorescence colors make them unique, as well as indispensable. Advances in quantum surface chemistry studies have led to the development of polymer-encapsulated probes with high fluorescence properties that are stable under complex biologic conditions. To use QDs in biologic studies, it is extremely important to cap or passivate the ZnS or CdS layer around the QD (CdSe). This layering of ZnS or CdS leads to the improvement of the fluorescence quantum yield (QY) of QDs and provides protection against photo-oxidation. QDs have had a major impact in molecular diagnostics and in tissue molecular KKN, ayırt edici özellik olarak, 10 nm'den daha küçük boyutu olan, küçük karbon nanopartiküllerdir ve izlenebilir hedeflenmiş salım, biyomedikal araştırma ve farklı terapi uygulamaları için zorunlu bir araç haline gelmiştir. Bu çalışmanın amacı, KKN'nın sentezi, karakterizasyon teknikleri ve biyomedikal uygulamaları ile ilgili güncel literatürü bir araya getirmekti. KKN sentezi için iki tip yapay yöntem yani yukarıdan aşağıya yaklaşım ve aşağıdan yukarıya yaklaşım kullanıldı. Yukarıdan aşağıya doğru yaklaşım, ark boşaltma yöntemini, lazer ablasyon yöntemini ve elektrokimyasal yöntemi içermektedir. Öte yandan aşağıdan yukarı yaklaşım, termal yöntem, mikrodalga destekli yöntem, hidrotermal ve sulu yöntem ve kalıp yöntemini içerir. Bu derlemede, CQD'nin biyomedikal alanda son dönemdeki ilerlemesini, sentetik yöntemlerine, karakterizasyonuna ve farklı uygulamalara odaklanarak açıkladık. Karbon noktaları, in vivo ve in vitro biyolojik görüntüleme ve etken madde salım çalışmaları için kapsamlı yeterliliğe sahiptir. Karbon noktaları için daha fazla sitotoksisite araştırması yapılmasına ihtiyaç duyulmasına rağmen, önceki veriler etken madde salımı ve biyolojik görüntüleme çalışmalarında karbon noktalarının parlak geleceğini göstermektedir. Anahtar kelimeler: Karbon kuantum noktalar, nanopartiküller, kuantum verimi, karbon nokta, fotolüminesans, nanokompozitler CQD are small carbon nanoparticles smallerl than 10 nm comprising distinctive properties, which have become an obligatory tool for traceable targeted delivery, biomedical research, and different therapy applications. The objective of the present work was to consolidate the current literature on the synthesis, characterizati...

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“…WLEDs employing such white-emitting CDs were fabricated and used as backlights (Fig. 10) [101]. Another example of white light emitting CDs synthesized via a one-step pyrolysis of poly(acrylic acid) in the presence of glycerol has been reported by Chen et al [102], who combined them within silica-based CDs/CdS QDs hybrids easily compatible with silicone to fabricate WLEDs with CIE coordinates of (0.27, 0.32).…”

Section: Wleds Based On Dual-color-emitting and White-emitting Qdsmentioning

confidence: 99%

Recent Progress in Quantum Dot Based White Light-Emitting Devices

Su,

Zhang,

Zhang

et al. 2016

Top Curr Chem (Z)

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Colloidal semiconductor quantum dots (QDs) have been widely employed as components of white light-emitting diodes (WLEDs) due to their excellent optical properties (highly saturated emission color, high luminescence quantum yield) as well as thermal and chemical stability. Much effort has been devoted to realize efficient QD-based WLEDs, including the synthesis of superior luminescent nanomaterials with excellent stabilities, and the design of advanced devices structures. In this paper, after introducing photometric parameters of the contemporary QD-based WLEDs, we highlight the recent progress in these devices grouped according to three main mechanisms for white light generation: optical excitation, direct charge carrier injection, and Förster resonance energy transfer. The methods to generate white light, the design of QD emitters and QD-based devices, as well as their fabrication techniques are considered, and the key scientific and technological challenges in the QD-based WLEDs are highlighted. Novel light-emitting materials for WLEDs such as carbon-based nanoparticles are also considered.

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Facile Access to White Fluorescent Carbon Dots toward Light-Emitting Devices

Cited by 167 publications

References 48 publications

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Carbon Quantum Dots: Synthesis, Characterization and Biomedical Applications

Recent Progress in Quantum Dot Based White Light-Emitting Devices

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