Tailoring surface groups of carbon quantum dots to improve photoluminescence behaviors

Tian, Ruixue; Hu, Shengliang; Wu, Lingling; Chang, Qing; Yang, Jinlong; Liu, Jun

doi:10.1016/j.apsusc.2014.02.028

Cited by 55 publications

(32 citation statements)

References 23 publications

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“…However, the preparation of AIE FONs require complex synthesized method and expensive reactant, limiting their large-scale synthesis. Fluorescent carbon dots (CDs), with low toxicity and good biocompatibility, have created immense attention in recent years and been widely used for bioimaging [8][9][10]. Various strategies for the preparation of fluorescent CDs have been reported, such as carbonizing organics, electrochemical oxidation, chemical oxidation and hydrothermal methods [11].…”

Section: Introductionmentioning

confidence: 99%

Preparation of fluorescent organic nanoparticles from polyethylenimine and sucrose for cell imaging

Zhang

Yang

et al. 2016

Materials Science and Engineering: C

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An approach for the synthesis of fluorescent organic nanoparticles (FONs) with a quantum yield of about 14% has been developed using polyethylenimine and sucrose. The FONs were prepared under mild reaction condition. The obtained FONs showed high water dispersibility, intense fluorescence, excitation-dependent emission feature, excellent nanoparticle stability, and high photostability. The cytotoxicity of the FONs was also evaluated using A549 cells, and the cell viability value was demonstrated greater than 90% even when the concentration was up to 120μgmL(-1), which proved excellent biocompatibility and made them promising for cell imaging.

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Section: Introductionmentioning

confidence: 99%

Preparation of fluorescent organic nanoparticles from polyethylenimine and sucrose for cell imaging

Zhang

Yang

et al. 2016

Materials Science and Engineering: C

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“…Further characterization of these precipitates by energy dispersive X-ray spectroscopy (EDS) suggested that only C, N, O elements were present (see Figure S2). Also, a new stretching peak of N-C=N groups 16,17 was observed in FTIR spectrum of the precipitates in addition to some O and Ncontained groups already present in the N-CDs solution ( Figure 4a). As shown in the top of Figure 4b, Schiff bases in connection with CDs were obtained by mixing N-CDs with DMF.…”

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confidence: 95%

“…16,17 EG molecules are dehydrated and carbonized to form CDs under hydrothermal conditions. 16 H and O exist in the forms of hydroxyl, carboxyl, or carbonyl groups on the surface of CDs, 11,17 so named as O-CDs. Subsequently O-CDs were modified employing ethylenediamine molecules, forming surface NH 2 -modified CDs (N-CDs, see Supporting Information).…”

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confidence: 99%

“…Characterization of the O-CDs surface species by electron energy loss spectroscopy (EELS, Figure 1b) reveals the C Kedge (285 eV) and O K-edge (539 eV) that are caused by sp 2 bonded carbon (C=C) and C-O bonds, respectively. 16,17 Compared to O-CDs, the EELS spectrum of N-CDs showed a new peaks at 400 eV that is attributed to N K-edge, suggesting C-N groups formation at the surface of N-CDs. 16,17 .…”

mentioning

confidence: 99%

“…16,17 Compared to O-CDs, the EELS spectrum of N-CDs showed a new peaks at 400 eV that is attributed to N K-edge, suggesting C-N groups formation at the surface of N-CDs. 16,17 . These were further verified with Fourier transform infrared (FTIR) spectroscopy in which the formation of amino-groups on the surface of CDs (Figure 1c) are clearly visible.…”

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confidence: 99%

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Self-assembly of fluorescent carbon dots in a N,N-dimethylmethanamide solution via Schiff base reaction

Ding

Chang

et al. 2015

Nanoscale

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The transition from nanoparticles suspended in aqueous solutions into solid fluorescent structures is developed for application in solid functional devices. The presented approach enables the organization of carbon dots into rod-like shapes that can still be re-dispersed into aqueous solution. Schiff bases forming at the surface of carbon dots not only protect their surface states, but also provide sites for tethering to other carbon dots. As a consequence, the large assemblies of CDs can come together to form regular, well ordered structures whilst still maintaining their photoluminescence properties. This opens up enormous possibilities for device manufacture, as these self-assemblies could be grown or grafted onto templates forming regular structures, and find innumerable applications ranging from optoelectronic devices, light harvesting to artificial photosynthesis.

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Biomass‐derived Carbon Quantum Dots – A Review. Part 1: Preparation and Characterization

et al. 2021

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The preparation of nanostructured carbon materials from chosen biomass through hydrothermal carbonization and pyrolysis processes by optimizing the reaction conditions is one of the bases for applying the product in certain of the development activities. The finished product more or less reflects the raw material and the way of preparation. Among the many products, carbon quantum dots (CQDs) have gained importance due to their bolstered characteristics and facile preparation. CQDs are zero‐dimensional (0D) nanomaterials which attracted attention in the recent past due to their excellent water solubility, unique optical properties, good electrical conductivity, eco‐friendliness, and biocompatibility. Small‐sized CQDs offer high surface area per unit volume, strong tunable fluorescence, photo‐luminescent emissions, and semiconducting properties. In this paper, identification of ideal raw materials, process parameters being followed in the preparation of CQDs through hydrothermal carbonization and pyrolysis techniques, and the properties of the resultant CQDs commensurate with the nature of process are reviewed.

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Tailoring surface groups of carbon quantum dots to improve photoluminescence behaviors

Cited by 55 publications

References 23 publications

Preparation of fluorescent organic nanoparticles from polyethylenimine and sucrose for cell imaging

Preparation of fluorescent organic nanoparticles from polyethylenimine and sucrose for cell imaging

Self-assembly of fluorescent carbon dots in a N,N-dimethylmethanamide solution via Schiff base reaction

Biomass‐derived Carbon Quantum Dots – A Review. Part 1: Preparation and Characterization

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