One-pot hydrothermal synthesis of highly luminescent nitrogen-doped amphoteric carbon dots for bioimaging from Bombyx mori silk – natural proteins

Wu, Zhu; Zhang, Pu; Gao, Mingxuan; Liu, Chun Fang; Wang, Wei; Leng, Fei; Huang, Cheng

doi:10.1039/c3tb20418a

Cited by 463 publications

(233 citation statements)

References 26 publications

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“…With the pyrrolidone formation, the relative amount of carbonyl (C5O) increases, which is consistent with the results of O 1s high-resolution XPS spectra. The peak at 531.7 eV, which is assigned to the carbonyl group, increases from the N-GQDs-B to N-GQDs-G and Y 34 . The peak at 530.6 eV is attributed from the C5O of quinone, which is from dehydrolysis of neighbor carboxyl groups.…”

Section: Resultsmentioning

confidence: 99%

Tailoring color emissions from N-doped graphene quantum dots for bioimaging applications

et al. 2015

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Unlike inorganic quantum dots, fluorescent graphene quantum dots (GQDs) display excitation-dependent multiple color emission. In this study, we report N-doped GQDs (N-GQDs) with tailored single color emission by tuning p-conjugation degree, which is comparable to the inorganic quantum dot. Starting from citric acid and diethylenetriamine, as prepared N-GQDs display blue, green, and yellow light emission by changing the reaction solvent from water, dimethylformamide (DMF), and solvent free. The X-ray photoelectron spectroscopy, ultraviolet-visible spectra results clearly show the N-GQDs with blue emission (N-GQDs-B) have relatively short effective conjugation length and more carboxyl group because H 2 O is a polar protic solvent, which tends to donate proton to the reagent to depress the H 2 O elimination reaction. On the other hand, the polar aprotic solvent (DMF) cannot donate hydrogen, the elimination of H 2 O is promoted and more nitrogen units enter GQD framework. With the increase of effective p-conjugation length and N content, the emission band of N-GQDS red-shifts to green and yellow. We also demonstrate that N-GQDs could be a potential great biomarker for fluorescent bioimaging.

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Section: Resultsmentioning

confidence: 99%

Tailoring color emissions from N-doped graphene quantum dots for bioimaging applications

et al. 2015

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“…Taking together all the information from literatures which characterized C-dots by UV-vis and PL spectroscopy [31,37,41,85,87,103,139], all types of C-dots are active in the UV-vis region of the electromagnetic spectrum, and the fluorescent emission of C-dots shows ex -dependent behavior. Recently, the timeresolved PL spectroscopy has been reported to be useful in measuring the photoluminescent lifetime of C-dots [37,41,87,103,139].…”

Section: Ultraviolet-visible and Photoluminescence Spectroscopymentioning

confidence: 99%

“…However, some of these synthetic methods suffer from limitations such as time-consuming treatment process, requirement of strong acids for catalysis, high energy consumption, and complex equipment set-up. Recently, there is a considerable interest in developing labor, material, and energy efficient synthetic methods for C-dots such as carbonization of naturally available bioresources [15,19,24,26,27,[30][31][32][33][34][35][36][37], preparation with low heating temperature [38], and synthesis without external heating [39,40]. In addition, the flexibility in modification and functionalization of the C-dots surface has opened many possibilities in the incorporation of heteroatoms such as nitrogen [15,20,21,[37][38][39][40][41][42][43][44][45][46], sulfur [33,[46][47][48][49], phosphorous [39,49], and silane [50] into C-dots framework to enhance the PL properties of C-dots.…”

Section: Introductionmentioning

confidence: 99%

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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“…Several groups have reported the use of hydrothermal carbonization of biomass to produce CQDs, which are the nucleation clusters forming prior to the growth into the final micrometer-sized carbon particle materials. [2,7,11,12] To date, the vast majority of the applications related to CQDs are in the field of medical diagnostics and bioimaging. [13][14][15] Recently, CQDs have also been used for catalysis, [7] and the development of novel optoelectronic materials, such as LEDs [16,17] and solar cells, where mesoporous TiO 2 was sensitized with CQDs derived from the dehydration of g-butyrolactone using sulfuric acid.…”

mentioning

confidence: 99%

Biomass‐Derived Carbon Quantum Dot Sensitizers for Solid‐State Nanostructured Solar Cells

et al. 2015

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New hybrid materials consisting of ZnO nanorods sensitized with three different biomass-derived carbon quantum dots (CQDs) were synthesized, characterized, and used for the first time to build solid-state nanostructured solar cells. The performance of the devices was dependent on the functional groups found on the CQDs. The highest efficiency was obtained using a layer-by-layer coating of two different types of CQDs.

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One-pot hydrothermal synthesis of highly luminescent nitrogen-doped amphoteric carbon dots for bioimaging from Bombyx mori silk – natural proteins

Cited by 463 publications

References 26 publications

Tailoring color emissions from N-doped graphene quantum dots for bioimaging applications

Tailoring color emissions from N-doped graphene quantum dots for bioimaging applications

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Biomass‐Derived Carbon Quantum Dot Sensitizers for Solid‐State Nanostructured Solar Cells

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