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Articles de revues sur le sujet « Luminescent Carbon Dots »

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Auteur : Grafiati
Publié le 7 septembre 2023

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1

Mancini, Federica, Arianna Menichetti, Lorenzo Degli Esposti, Monica Montesi, Silvia Panseri, Giada Bassi, Marco Montalti, Laura Lazzarini, Alessio Adamiano et Michele Iafisco. « Fluorescent Carbon Dots from Food Industry By-Products for Cell Imaging ». Journal of Functional Biomaterials 14, no 2 (7 février 2023) : 90. http://dx.doi.org/10.3390/jfb14020090.

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Herein, following a circular economy approach, we present the synthesis of luminescent carbon dots via the thermal treatment of chestnut and peanut shells, which are abundant carbon-rich food industry by-products. As-synthesized carbon dots have excellent water dispersibility thanks to their negative surface groups, good luminescence, and photo-stability. The excitation–emission behaviour as well as the surface functionalization of these carbon dots can be tuned by changing the carbon source (chestnuts or peanuts) and the dispersing medium (water or ammonium hydroxide solution). Preliminary in vitro biological data proved that the samples are not cytotoxic to fibroblasts and can act as luminescent probes for cellular imaging. In addition, these carbon dots have a pH-dependent luminescence and may, therefore, serve as cellular pH sensors. This work paves the way towards the development of more sustainable carbon dot production for biomedical applications.
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Bourlinos, Athanasios B., Radek Zbořil, Jan Petr, Aristides Bakandritsos, Marta Krysmann et Emmanuel P. Giannelis. « Luminescent Surface Quaternized Carbon Dots ». Chemistry of Materials 24, no 1 (23 décembre 2011) : 6–8. http://dx.doi.org/10.1021/cm2026637.

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3

Linehan, Keith, et Hugh Doyle. « Solution reduction synthesis of amine terminated carbon quantum dots ». RSC Adv. 4, no 24 (2014) : 12094–97. http://dx.doi.org/10.1039/c3ra47770c.

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Highly luminescent water soluble carbon quantum dots (CQDs) with narrow size distributions have been prepared via a simple room temperature, solution-phase synthesis. The CQDs, stabilised by covalently bound allylamine ligands to minimise surface oxidation, exhibit an excitation wavelength dependent blue luminescence with a quantum yield of 25%.
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Su, Weitao, Yuchan Wang, Weiwei Wu, Haiying Qin, Kaixin Song, Xiwei Huang, Lijie Zhang et Daqin Chen. « Towards full-colour tunable photoluminescence of monolayer MoS2/carbon quantum dot ultra-thin films ». Journal of Materials Chemistry C 5, no 25 (2017) : 6352–58. http://dx.doi.org/10.1039/c7tc01773a.

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Kargbo, Osman, Yan Jin et Shou-Nian Ding. « Recent Advances in Luminescent Carbon Dots ». Current Analytical Chemistry 11, no 1 (19 décembre 2014) : 4–21. http://dx.doi.org/10.2174/1573411010666141010160217.

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da Silva Souza, Débora Rosa, Larissa Durães Caminhas, João Paulo de Mesquita et Fabiano Vargas Pereira. « Luminescent carbon dots obtained from cellulose ». Materials Chemistry and Physics 203 (janvier 2018) : 148–55. http://dx.doi.org/10.1016/j.matchemphys.2017.10.001.

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Wang, Fu, Zheng Xie, Hao Zhang, Chun-yan Liu et Ying-ge Zhang. « Highly Luminescent Organosilane-Functionalized Carbon Dots ». Advanced Functional Materials 21, no 6 (25 février 2011) : 1027–31. http://dx.doi.org/10.1002/adfm.201002279.

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Dong, Yongqiang, Jianhua Cai, Xu You et Yuwu Chi. « Sensing applications of luminescent carbon based dots ». Analyst 140, no 22 (2015) : 7468–86. http://dx.doi.org/10.1039/c5an01487e.

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Carbon based dots (CDs) including carbon quantum dots and graphene quantum dots exhibit unique luminescence properties, such as photoluminescence (PL), chemiluminescence (CL) and electrochemiluminescence (ECL).
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9

Hoan, Bui Thi, Phuong Dinh Tam et Vuong-Hung Pham. « Green Synthesis of Highly Luminescent Carbon Quantum Dots from Lemon Juice ». Journal of Nanotechnology 2019 (2 mai 2019) : 1–9. http://dx.doi.org/10.1155/2019/2852816.

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Highly luminescent carbon dots (C-dots) were synthesized by the one-pot simple hydrothermal method directly from lemon juice using different temperatures, time, aging of precursors, and diluted solvents to control the luminescence of C‐dots. The obtained C-dots were characterized by high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectrophotometry, dynamic light scattering, ultraviolet-visible spectrophotometry, and photoluminescent spectrophotometry. The results show that C‐dots had strong green light emission with quantum yield in the range of 14.86 to 24.89% as a function of hydrothermal temperatures. Furthermore, light emission that is dependent on hydrothermal time, aging of precursor, and diluted solvent was observed. These results suggest that the C‐dots have potential application in optoelectronics and bioimaging.
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Stan, Loredana, Irina Volf, Corneliu S. Stan, Cristina Albu, Adina Coroaba, Laura E. Ursu et Marcel Popa. « Intense Blue Photo Emissive Carbon Dots Prepared through Pyrolytic Processing of Ligno-Cellulosic Wastes ». Nanomaterials 13, no 1 (27 décembre 2022) : 131. http://dx.doi.org/10.3390/nano13010131.

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In this work, Carbon Dots with intense blue photo-luminescent emission were prepared through a pyrolytic processing of forestry ligno-cellulosic waste. The preparation path is simple and straightforward, mainly consisting of drying and fine grinding of the ligno-cellulosic waste followed by thermal exposure and dispersion in water. The prepared Carbon Dots presented characteristic excitation wavelength dependent emission peaks ranging within 438–473 nm and a remarkable 28% quantum yield achieved at 350 nm excitation wavelength. Morpho-structural investigations of the prepared Carbon Dots were performed through EDX, FT-IR, Raman, DLS, XRD, and HR-SEM while absolute PLQY, steady state, and lifetime fluorescence were used to highlight their luminescence properties. Due to the wide availability of this type of ligno-cellulosic waste, an easy processing procedure achieved photo-luminescent properties, and the prepared Carbon Dots could be an interesting approach for various applications ranging from sensors, contrast agents for biology investigations, to photonic conversion mediums in various optoelectronic devices. Additionally, their biocompatibility and waste valorization in new materials might be equally good arguments in their favor, bringing a truly “green” approach.
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Meng, Shuai, Dengke Cheng, Hailing Gu, Yuchen Li, Yukun Qin, Jing Tan et Qijun Li. « Mechanical Force-Induced Color-Variable Luminescence of Carbon Dots in Boric Acid Matrix ». Molecules 28, no 8 (12 avril 2023) : 3388. http://dx.doi.org/10.3390/molecules28083388.

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Mechano-luminescent materials that exhibit distinct luminescence responses to force stimuli are urgently anticipated in view of application needs in the fields of sensing, anti-counterfeiting, optoelectronic devices, etc. However, most of the reported materials normally exhibit force-induced changes in luminescent intensity, whereas materials that possess force-induced color-variable luminescence remain rarely reported. Herein, for the first time, a novel mechanical force-induced color-variable luminescence material from carbon dots (CDs) in boric acid (CD@BA) is reported. At low CDs concentration, the luminescence of CD@BA exhibits a grinding-induced color variable from white to blue. This grinding-induced color variable can be switched to yellow-to-white changing by increasing the CDs concentration in BA. The grinding-induced color-variable luminescence originates from dynamic variation in emission ratio of fluorescence and room temperature phosphorescence, due to the influence of oxygen and water vapor in the air. At high CDs concentration, short-wavelength fluorescence undergoes more severe reabsorption compared to room temperature phosphorescence, leading to grinding-induced color-variable switching from white-to-blue to yellow-to-white. Based on the unique properties of CD@BA powder, the applications of recognizing and visualizing fingerprints on the surfaces of various of materials are demonstrated.
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Peng, Chenxi, Xue Chen, Meiling Chen, Shenci Lu, Yu Wang, Suli Wu, Xiaowang Liu et Wei Huang. « Afterglow Carbon Dots : From Fundamentals to Applications ». Research 2021 (9 février 2021) : 1–27. http://dx.doi.org/10.34133/2021/6098925.

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The ability of carbon dots (CDs) to emit afterglow emission in addition to fluorescence in response to UV-to-visible excitation allows them to be a new class of luminescent materials. When compared with traditional organic or inorganic afterglow materials, CDs have a set of advantages, including small size, ease of synthesis, and absence of highly toxic metal ions. In addition, high dependence of their afterglow color output on temperature, excitation wavelength, and aggregation degrees adds remarkable flexibility in the creation of multimode luminescence of CDs without the need for changing their intrinsic attributes. These characteristics make CDs particularly attractive in the fields of sensing, anticounterfeiting, and data encryption. In this review, we first describe the general attributes of afterglow CDs and their fundamental afterglow mechanism. We then highlight recent strategic advances in the generation or activation of the afterglow luminescence of CDs. Considerable emphasis is placed on the summarization of their emergent afterglow properties in response to external stimulation. We further highlight the emerging applications of afterglow CDs on the basis of their unique optical features and present the key challenges needed to be addressed before the realization of their full practical utility.
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Lauria, Alessandro, et Erlantz Lizundia. « Luminescent carbon dots obtained from polymeric waste ». Journal of Cleaner Production 262 (juillet 2020) : 121288. http://dx.doi.org/10.1016/j.jclepro.2020.121288.

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Wang, Qinlong, Xiaoxiao Huang, Yijuan Long, Xiliang Wang, Haijie Zhang, Rui Zhu, Liping Liang, Ping Teng et Huzhi Zheng. « Hollow luminescent carbon dots for drug delivery ». Carbon 59 (août 2013) : 192–99. http://dx.doi.org/10.1016/j.carbon.2013.03.009.

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Ibrayev, N. Kh. « SPECTRAL AND LUMINESCENT PROPERTIES OF CARBON QUANTUM DOTS FUNCTIONALIZED WITH N- AND S-CONTAINING GROUPS ». Eurasian Physical Technical Journal 18, no 2 (11 juin 2021) : 12–17. http://dx.doi.org/10.31489/2021no2/12-17.

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In the presented work, carbon quantum dots were obtained by microwave synthesis based on citric acid and Lcysteine. The resulting particles were characterized by electron and probe microscopy, dynamic light scattering and Fourier transform infrared spectroscopy. The spectral and luminescent properties were investigated for the initial solution of carbon quantum dots, as well as solutions obtained as a result of dialysis of the synthesized product. It is shown that all samples exhibit the same optical properties. At the same time, the measurement of quantum yields showed that carbon dots that have passed through the dialysis membrane have the best fluorescent ability.
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Stepanidenko, Evgeniia, Pavel Khavlyuk, Irina Arefina, Sergei Cherevkov, Yuan Xiong, Aaron Döring, Georgii Varygin et al. « Strongly Luminescent Composites Based on Carbon Dots Embedded in a Nanoporous Silicate Glass ». Nanomaterials 10, no 6 (30 mai 2020) : 1063. http://dx.doi.org/10.3390/nano10061063.

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Luminescent composites based on entirely non-toxic, environmentally friendly compounds are in high demand for a variety of applications in photonics and optoelectronics. Carbon dots are a recently developed kind of luminescent nanomaterial that is eco-friendly, biocompatible, easy-to-obtain, and inexpensive, with a stable and widely tunable emission. Herein, we introduce luminescent composites based on carbon dots of different chemical compositions and with different functional groups at the surface which were embedded in a nanoporous silicate glass. The structure and optical properties of these composites were comprehensively examined using electron microscopy, Fourier transform infrared transmission, UV-Vis absorption, and steady-state and time-resolved photoluminescence. It is shown that the silicate matrix efficiently preserved, and even enhanced the emission of different kinds of carbon dots tested. The photoluminescence quantum yield of the fabricated nanocomposite materials reached 35–40%, which is comparable to or even exceeds the values for carbon dots in solution.
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Mai, Xuan-Dung, Quang-Trung Le, Lan-Anh Nguyen Thi, Phuong Nguyen Thi, Phuong Le Thi et Viet-Hong La. « Photosynthesis of Silver Nanoparticle – Carbon Quantum Dots Nanocomposites ». Material Science Research India 16, no 2 (10 août 2019) : 118–24. http://dx.doi.org/10.13005/msri/160205.

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Nanocomposites (NCs) of silver nanoparticles (Ag NPs) and carbon quantum dots (CQDs) have been received increasing attention for diverse applications including sensing, photocatalyst, surface enhanced Raman scattering detection and antibacterial. Herein, we report a unique photosynthesis of Ag NPs-CQD using CQDs as photo-reducing agent. Highly luminescent CQDs were prepared by a hydrothermal method using a mixture of citric acid (CA) and ethylenediamine (EDA) as starting precursors. X-ray diffraction pattern (XRD), transmission electron microscope (TEM), infrared (IR) and Raman spectroscopies confirmed the formation of NCs. We have demonstrated that the formation of Ag NPs accompanied with the degradation of surface fluorophores, which responded for the resolved absorption peak at ca. 346 nm and high luminescence of pristine CQDs. The NCs showed excellent antibacterial affinity to Escherichia coli. The results provide new understandings on the interactions between CQDs and silver ions as well as potential applications of Ag NP – CQD nanocomposites.
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Lin, Fengming, Yan-Wen Bao et Fu-Gen Wu. « Carbon Dots for Sensing and Killing Microorganisms ». C 5, no 2 (14 juin 2019) : 33. http://dx.doi.org/10.3390/c5020033.

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Carbon dots (or carbon quantum dots) are small (less than 10 nm) and luminescent carbon nanoparticles with some form of surface passivation. As an emerging class of nanomaterials, carbon dots have found wide applications in medicine, bioimaging, sensing, electronic devices, and catalysis. In this review, we focus on the recent advancements of carbon dots for sensing and killing microorganisms, including bacteria, fungi, and viruses. Synthesis, functionalization, and a toxicity profile of these carbon dots are presented. We also discuss the underlying mechanisms of carbon dot-based sensing and killing of microorganisms.
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Zhang, Xinying, Xialing Hou, Decheng Lu, Yingying Chen et Lingyan Feng. « Porphyrin Functionalized Carbon Quantum Dots for Enhanced Electrochemiluminescence and Sensitive Detection of Cu2+ ». Molecules 28, no 3 (2 février 2023) : 1459. http://dx.doi.org/10.3390/molecules28031459.

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Porphyrin (TMPyP) functionalized carbon quantum dots (CQDs-TMPyP), a novel and efficient carbon nanocomposite material, were developed as a novel luminescent material, which could be very useful for the sensitive detection of copper ions in the Cu2+ quenching luminescence of functionalized carbon quantum dots. Therefore, we constructed a sensitive “signal off” ECL biosensor for the detection of Cu2+. This sensor can sensitively respond to copper ions in the range of 10 nM to 10 μM, and the detection limit is 2.78 nM. At the same time, it has good selectivity and stability and a benign response in complex systems. With excellent properties, this proposed ECL biosensor provides an efficient and ultrasensitive method for Cu2+ detection.
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Li, Yunxia, Peng Miao, Wei Zhou, Xiao Gong et Xiujian Zhao. « N-doped carbon-dots for luminescent solar concentrators ». J. Mater. Chem. A 5, no 40 (2017) : 21452–59. http://dx.doi.org/10.1039/c7ta05220k.

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Junka, Karoliina, Jiaqi Guo, Ilari Filpponen, Janne Laine et Orlando J. Rojas. « Modification of Cellulose Nanofibrils with Luminescent Carbon Dots ». Biomacromolecules 15, no 3 (5 février 2014) : 876–81. http://dx.doi.org/10.1021/bm4017176.

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Linehan, Keith, et Hugh Doyle. « Size controlled synthesis of carbon quantum dots using hydride reducing agents ». J. Mater. Chem. C 2, no 30 (2014) : 6025–31. http://dx.doi.org/10.1039/c4tc00826j.

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Liu, Guiju, Xiaohan Wang, Guangting Han, Jianyong Yu et Haiguang Zhao. « Earth abundant colloidal carbon quantum dots for luminescent solar concentrators ». Materials Advances 1, no 2 (2020) : 119–38. http://dx.doi.org/10.1039/d0ma00181c.

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GAREEV, B. M., A. M. ABDRAKHMANOV et G. L. SHARIPOV. « LUMINESCENT DETERMINATION OF SUGAR IN NATURAL HONEY ». Izvestia Ufimskogo Nauchnogo Tsentra RAN, no 4 (11 décembre 2020) : 29–32. http://dx.doi.org/10.31040/2222-8349-2020-0-4-29-32.

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The photoluminescence of carbon quantum dots synthesized from natural honey and mixtures of honey and sugar has been studied. An increase in the sugar content leads to a decrease in the photoluminescence intensity without changing the shape of the luminescence spectrum of these quantum dots aqueous solutions, which is associated with a decrease in the yield of their synthesis in the sugar presence. The discovered effect can be used to detect sugar in honey. When examining five different market samples of flower honey using this method, two of them showed a significant decrease in the photoluminescence intensity. A laboratory test for compliance with GOST 19792-2017 Standard requirements established an excess of the sucrose content in these samples. Luminescent determination of sugar in honey does not require complicated equipment and can be used to develop a new analytical method for determining the sugar content in counterfeit natural honey.
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Pranav Y. Dave et Jyoti Sharma. « Carbon Dot-Lanthanide Composite Based Smart Luminescent Anticounterfeiting Material ». Journal of Nanoscience and Technology 6, no 4 (27 décembre 2020) : 924–27. http://dx.doi.org/10.30799/jnst.314.20060402.

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In this emerging technology world, the counterfeit of products are increasing due to raising the economy of industry. Counterfeiting is as old as the human desire to create objects of value. There are number of products, which can be easily duplicated by simple processes and the product is accurate and precise. Counterfeit is a problem of product security, the rise and affects every product category from consumer goods to medicines and spare parts. Products can furthermore contain non-active or even toxic- ingredients. So, luminescent materials are useful to detect different counterfeit products at different wavelength. The carbon dots-lanthanide composite based gel formulation is used to coat on different subtract and according to the process their different characterization part for the prevention of counterfeit problems. Carbon dots-lanthanide composites are basically easy to synthesis and they have fluorescent property, which can help to make product unique and diverse. With help of UV chamber, the carbon dots-lanthanide composites are easily detected at some particular wavelength. So by using this property, the gel formulation can be fabricated to coat on different subtract and characterize different surface morphology for the future precepts. UV-Vis- spectrophotometer was utilized to differentiate optical properties and fluorospectrometer was exploited to differentiate fluorescent properties of carbon dots, carbon dots-lanthanide composite and CDs-lanthanide based fluorescent ink. FT-IR and viscometer were used characterized other properties of carbon dots-lanthanide based fluorescent ink. This research article is the revised article of one step synthesis of carbon dots based smart fluorescent security ink.
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Yang, Chuanxu, Ryosuke Ogaki, Line Hansen, Jørgen Kjems et Boon Mian Teo. « Theranostic carbon dots derived from garlic with efficient anti-oxidative effects towards macrophages ». RSC Advances 5, no 118 (2015) : 97836–40. http://dx.doi.org/10.1039/c5ra16874k.

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Padmapriya, A., R. Krishnaveni, R. A. Kalaivani et A. M. Shanmugharaj. « Synthesis, Characterization and Applications of Plain and Non-Metal Doped, Biomass-Derived Carbon Quantum Dots : A Short Review ». Asian Journal of Chemistry 34, no 12 (2022) : 3048–58. http://dx.doi.org/10.14233/ajchem.2022.24044.

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Carbon dots (CDs) are very small particles have acquired research interest in the last few years, due to their unique characteristics like low-cost synthetic protocols, fast and flexible modification procedures and low toxicity. These CDs exhibit excellent physical and chemical properties like high crystallization, superconductivity, electronic conductivity, etc. and hence they establish themselves as massive entrants in emerging fields of applications like chemical sensors, nanomedicines and electrocatalytic reactions. Functional nanosensors with luminescent properties are in high demand in bioanalysis and doped carbon dots play a great role in this feature. The elements viz. B, C, N, P and S doped carbon dots are used in the detection of metal ions in biological samples, bioimaging and DNA studies. This critical review examines the environmentally friendly techniques of synthesizing doped/undoped carbon quantum dots from biomasses, with an emphasis on their electrochemical and luminescent applications.
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Yang, Chuanxu, Rasmus Peter Thomsen, Ryosuke Ogaki, Jørgen Kjems et Boon M. Teo. « Ultrastable green fluorescence carbon dots with a high quantum yield for bioimaging and use as theranostic carriers ». Journal of Materials Chemistry B 3, no 22 (2015) : 4577–84. http://dx.doi.org/10.1039/c5tb00467e.

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Green luminescent carbon dots with a high quantum yield and superior stability over a range of pH are synthesised for the first time via a new heating method. The carbon dots can be assembled into defined nanocomplexes as theranostic carriers for doxorubicin delivery.
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Lizundia, Erlantz, Thanh-Dinh Nguyen, Jose L. Vilas, Wadood Y. Hamad et Mark J. MacLachlan. « Chiroptical luminescent nanostructured cellulose films ». Materials Chemistry Frontiers 1, no 5 (2017) : 979–87. http://dx.doi.org/10.1039/c6qm00225k.

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Hagiwara, Kenta, Hiroshi Uchida, Yumiko Suzuki, Takashi Hayashita, Kanjiro Torigoe, Tetsuya Kida et Satoshi Horikoshi. « Role of alkan-1-ol solvents in the synthesis of yellow luminescent carbon quantum dots (CQDs) : van der Waals force-caused aggregation and agglomeration ». RSC Advances 10, no 24 (2020) : 14396–402. http://dx.doi.org/10.1039/d0ra01349h.

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Li, Yongsheng, Xiaoxia Zhong, Amanda E. Rider, Scott A. Furman et Kostya (Ken) Ostrikov. « Fast, energy-efficient synthesis of luminescent carbon quantum dots ». Green Chem. 16, no 5 (2014) : 2566–70. http://dx.doi.org/10.1039/c3gc42562b.

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Luo, Xuan, Ahmed Hussein Mohammed Al-Antaki, Kasturi Vimalanathan, Jillian Moffatt, Kun Zheng, Yichao Zou, Jin Zou et al. « Laser irradiated vortex fluidic mediated synthesis of luminescent carbon nanodots under continuous flow ». Reaction Chemistry & ; Engineering 3, no 2 (2018) : 164–70. http://dx.doi.org/10.1039/c7re00197e.

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Lin, Li-ping, Xin-Xing Wang, Shao-Qin Lin, Li-Hong Zhang, Chang-Qing Lin, Zhi-Ming Li et Jia-Ming Liu. « Research on the spectral properties of luminescent carbon dots ». Spectrochimica Acta Part A : Molecular and Biomolecular Spectroscopy 95 (septembre 2012) : 555–61. http://dx.doi.org/10.1016/j.saa.2012.04.049.

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Zhou, Yufeng, Daniele Benetti, Xin Tong, Lei Jin, Zhiming M. Wang, Dongling Ma, Haiguang Zhao et Federico Rosei. « Colloidal carbon dots based highly stable luminescent solar concentrators ». Nano Energy 44 (février 2018) : 378–87. http://dx.doi.org/10.1016/j.nanoen.2017.12.017.

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Astafiev, A. A., A. M. Shakhov, A. A. Vasin, Yu V. Kostina et V. A. Nadtochenko. « Femtosecond Laser Synthesis of Luminescent Carbon Dots from Toluene ». JETP Letters 110, no 7 (octobre 2019) : 464–71. http://dx.doi.org/10.1134/s0021364019190056.

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Wang, Yanyan, Yi Li, Yan Yan, Jun Xu, Buyuan Guan, Qiang Wang, Jiyang Li et Jihong Yu. « Luminescent carbon dots in a new magnesium aluminophosphate zeolite ». Chemical Communications 49, no 79 (2013) : 9006. http://dx.doi.org/10.1039/c3cc43375g.

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Ma, Xintong, Sirui Li, Volker Hessel, Liangliang Lin, Stefan Meskers et Fausto Gallucci. « Synthesis of luminescent carbon quantum dots by microplasma process ». Chemical Engineering and Processing - Process Intensification 140 (juin 2019) : 29–35. http://dx.doi.org/10.1016/j.cep.2019.04.017.

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Sk, Md Palashuddin, Sunil Kumar Sailapu et Arun Chattopadhyay. « Luminescent Carbon Dots for Logic Operations in Two Phases ». ChemPhysChem 16, no 4 (7 janvier 2015) : 723–27. http://dx.doi.org/10.1002/cphc.201402747.

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Sk, Md Palashuddin, Sunil Kumar Sailapu et Arun Chattopadhyay. « Luminescent Carbon Dots for Logic Operations in Two Phases ». ChemPhysChem 16, no 4 (3 mars 2015) : 697. http://dx.doi.org/10.1002/cphc.201500136.

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Yang, Jing, Yong Liu, Jing Wang, Song Wang, Xinzhe Zhou et Huanrong Li. « Visual multiple color emission of solid-state carbon dots ». Journal of Materials Chemistry C 7, no 25 (2019) : 7806–11. http://dx.doi.org/10.1039/c9tc01638d.

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Solid-state luminescent carbon dots (CDs) with visual multiple color emission properties have been prepared by a facile in situ synthesis approach within the confined interlayers of the host 2D matrix LAPONITE® (SNC/Lap). The prospective application of SNC/Lap in white light emitting diode (LED) are demonstrated herein.
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Huo, Feng, Yuran Tang, Yuhang Liu, Chao Tan, Lin Chang, Zakaria Mirza et Wei Zhang. « High-Purity Carbon Dots Prepared by Modulating Morphology of Carbon Nano-Crystals : In Vitro and In Vivo Multi-Color Bioimaging ». Nano 14, no 12 (décembre 2019) : 1950150. http://dx.doi.org/10.1142/s1793292019501509.

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Due to the unique optical properties and excellent biological applications, carbon-based luminescent materials have become a research hotspot in recent years. In this paper, we report a synthesis method under mild condition, in which Carbon NanoCrystals (CNCs) were first prepared, and then high-purity multi-color carbon dots (HPMCCDs) were synthesized by modulating crystal morphology. The prepared nonfluorescent CNCs are, respectively, dissolved in a strong polar solvent and a weak polar solvent to prepare HPMCCDs. It exhibits the multi-excitation and multi-emission features (from green to yellow). The high-purity carbon dots (HPCDs) prepared by using this method demonstrate the higher quantum yields (QYs) (53.7%) than that of the carbon dots (CD) by traditional hydrothermal methods with dialysis, and make full use of the atomic economic model. Besides, it shows the unique up-conversion luminescence property (UCLP) at lower wavelength excitation and, which can also be placed for a long time at room temperature without being oxidized or deteriorated. Furthermore, we explored the regulation of polar-chromism mechanism of the CNCs. Finally, the HPMCCDs can be used for multi-color bioimaging in vivo and in vitro and as well as many other potential applications.
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Li, Yan, Can Liu, Yulong An, Menglin Chen, Yunwu Zheng, Hao Tian, Rui Shi, Xiahong He et Xu Lin. « Synthesis of color-tunable tannic acid-based carbon dots for multicolor/white light-emitting diodes ». New Journal of Chemistry 45, no 48 (2021) : 22559–63. http://dx.doi.org/10.1039/d1nj04393e.

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Ren, Jian, Fabian Weber, Florian Weigert, Yajie Wang, Sneha Choudhury, Jie Xiao, Iver Lauermann, Ute Resch-Genger, Annika Bande et Tristan Petit. « Influence of surface chemistry on optical, chemical and electronic properties of blue luminescent carbon dots ». Nanoscale 11, no 4 (2019) : 2056–64. http://dx.doi.org/10.1039/c8nr08595a.

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Fan, Xiaohui, Yang Wang, Bo Li, Chang Shen, Zhengguang Sun, Yuan Zhan et Yuhong Zhang. « Highly luminescent pH-responsive carbon quantum dots for cell imaging ». Nanotechnology 33, no 26 (7 avril 2022) : 265002. http://dx.doi.org/10.1088/1361-6528/ac5ee5.

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Abstract Carbon quantum dots (CDs) have attracted tremendous interest owing to their idiosyncratic functions and wide-ranging applications. However, it remains a great challenge to empolder an integrated CDs combining high luminescence, biocompatibility and luminescence color tunability for bioimaging via simple approach. In this work, pH-responsive carbon quantum dots (Si-CDs) with high luminescence (quantum yield = 74.8%) were fabricated by one-step hydrothermal method using (3-mercaptopropyl) triethoxysilane (KH-580) as modifier for the first time. The optical properties of the as-prepared Si-CDs can be controlled from obvious green–blue–violet transformation by altering the pH. More importantly, the change is reversible and repeatable. In addition, the Si-CDs have good biocompatibility and chemically inert in vitro cell system simulation. Such non-toxic, environmental friendly, low-cost, inert CDs materials are promising candidates for biomedical and pH-sensitive sensors.
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Zhao, Haiguang, Guiju Liu et Guangting Han. « High-performance laminated luminescent solar concentrators based on colloidal carbon quantum dots ». Nanoscale Advances 1, no 12 (2019) : 4888–94. http://dx.doi.org/10.1039/c9na00527g.

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Dwandaru, Wipsar Sunu Brams, Abdul Rosyid Hidayatullah, Eka Sentia Ayu Listari et Deby Grace SL. « Utilization of Luminescent Carbon Nanodots from Soybean Husk Wastes for Fingerprint Identification using Tracker Software Spectrum Analysis ». POSITRON 13, no 1 (31 mai 2023) : 41. http://dx.doi.org/10.26418/positron.v13i1.57863.

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Visible fingerprints (FPs) play a crucial role in forensic identification, and luminescent carbon nanodots (C-Dots) have shown promise in enhancing their visibility. However, the optimal concentration of C-Dots for effective coating remains largely unexplored. This research aimed to determine the ideal C-Dots concentration for FPs identification. The fingerprint (FP) patterns of two subjects, L and P, were analyzed, revealing intensity peaks in 200 mm - 250 mm and 100 mm - 150 mm, respectively. The FP patterns were observed using a light microscope and Tracker software spectral analysis. The C-Dots samples were produced with variation in concentrations of (%W/V) 40%, 43.4%, and 47.6%. The spectrophotometer ultraviolet-visible (UV-Vis) test of the C-Dots showed absorption peaks at 270 nm and 330 nm wavelengths. The photoluminescence test indicated that the C-Dots have cyan luminescence. The X-ray diffraction (XRD) test showed that the C-Dots were amorphous. The spectrometer Fourier transform infrared (FTIR) test showed the presence of C = C functional groups. The scanning electron microscope (SEM) images with 5000x magnification showed the surface morphology of the C-Dots mimicking crumpled papers. Using Tracker software, FPs were successfully differentiated, with the clearest visual FPs observed when using a C-Dots concentration of 43.4%. Thus, the optimal concentration of C-Dots for FP identification was 43.4%.
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Alam, Al-Mahmnur, Byung-Yong Park, Zafar Khan Ghouri, Mira Park et Hak-Yong Kim. « Synthesis of carbon quantum dots from cabbage with down- and up-conversion photoluminescence properties : excellent imaging agent for biomedical applications ». Green Chemistry 17, no 7 (2015) : 3791–97. http://dx.doi.org/10.1039/c5gc00686d.

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Zdražil, Lukáš, Sergii Kalytchuk, Kateřina Holá, Martin Petr, Oldřich Zmeškal, Štěpán Kment, Andrey L. Rogach et Radek Zbořil. « A carbon dot-based tandem luminescent solar concentrator ». Nanoscale 12, no 12 (2020) : 6664–72. http://dx.doi.org/10.1039/c9nr10029f.

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Janus, Łukasz, Julia Radwan-Pragłowska, Marek Piątkowski et Dariusz Bogdał. « Facile Synthesis of Surface-Modified Carbon Quantum Dots (CQDs) for Biosensing and Bioimaging ». Materials 13, no 15 (25 juillet 2020) : 3313. http://dx.doi.org/10.3390/ma13153313.

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Recently, fluorescent probes became one of the most efficient tools for biosensing and bioimaging. Special attention is focused on carbon quantum dots (CQDs), which are characterized by the water solubility and lack of cytotoxicity. Moreover, they exhibit higher photostability comparing to traditional organic dyes. Currently, there is a great need for the novel, luminescent nanomaterials with tunable properties enabling fast and effective analysis of the biological samples. In this article, we propose a new, ecofriendly bottom-up synthesis approach for intelligent, surface-modified nanodots preparation using bioproducts as a raw material. Obtained nanomaterials were characterized over their morphology, chemical structure and switchable luminescence. Their possible use as a nanodevice for medicine was investigated. Finally, the products were confirmed to be non-toxic to fibroblasts and capable of cell imaging.
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Wang, Liang, Weitao Li, Luqiao Yin, Yijian Liu, Huazhang Guo, Jiawei Lai, Yu Han et al. « Full-color fluorescent carbon quantum dots ». Science Advances 6, no 40 (octobre 2020) : eabb6772. http://dx.doi.org/10.1126/sciadv.abb6772.

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Quantum dots have innate advantages as the key component of optoelectronic devices. For white light–emitting diodes (WLEDs), the modulation of the spectrum and color of the device often involves various quantum dots of different emission wavelengths. Here, we fabricate a series of carbon quantum dots (CQDs) through a scalable acid reagent engineering strategy. The growing electron-withdrawing groups on the surface of CQDs that originated from acid reagents boost their photoluminescence wavelength red shift and raise their particle sizes, elucidating the quantum size effect. These CQDs emit bright and remarkably stable full-color fluorescence ranging from blue to red light and even white light. Full-color emissive polymer films and all types of high–color rendering index WLEDs are synthesized by mixing multiple kinds of CQDs in appropriate ratios. The universal electron-donating/withdrawing group engineering approach for synthesizing tunable emissive CQDs will facilitate the progress of carbon-based luminescent materials for manufacturing forward-looking films and devices.
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