Mg/N double doping strategy to fabricate extremely high luminescent carbon dots for bioimaging

Li, Fan; Liu, Changjun; Yang, Jian; Zheng, Wen-Chen; Liu, Wenguang; Tian, Faming

doi:10.1039/c3ra43826k

Cited by 165 publications

(92 citation statements)

References 27 publications

(35 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A typical example of XPS analysis employed to estimate the surface states and chemical composition of nitrogen and sulfur-codoped C-dots (SNCNs) was displayed in Figure 6 [46]. In addition, the incorporation of C-dots with metal heteroatoms such as Al [153], Mg [154], and Ni [155] that cannot be detected by IR has also been demonstrated by XPS. Although XPS is very valuable in the characterization of elemental composition and functionalities of C-dots, it does not generally have the spatial resolution to examine individual nanoparticles.…”

Section: X-ray Photoelectronmentioning

confidence: 96%

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Gong

Liu

et al. 2017

Journal of Nanomaterials

View full text Add to dashboard Cite

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.

show abstract

Section: X-ray Photoelectronmentioning

confidence: 96%

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Gong

Liu

et al. 2017

Journal of Nanomaterials

View full text Add to dashboard Cite

show abstract

“…have been used as dopants to change the optical, electrochemical, and biological properties of C-dots for their versatile application. 87,[161][162][163][164][165][166] Qian et al developed a simple solvothermal method to synthesize Si-doped C-dots using SiCl 4 and hydroquinone. 161 The as-prepared Si-doped C-dots have maximum fluorescence at 382 nm with a quantum yield of up to 19.2%, owing to fluorescence enhancement by the introduced silicon atoms.…”

Section: Other Atoms (Si Ge Se Gd and Tb)mentioning

confidence: 99%

Improving the functionality of carbon nanodots: doping and surface functionalization

et al. 2016

View full text Add to dashboard Cite

Distinct from conventional carbon nanostructures, such as fullerene, graphene, and carbon nanotubes, carbon nanodots (C-dots) exhibit unique properties such as strong fluorescence, high photostability, chemical inertness, low toxicity, and biocompatibility. Various synthetic routes for C-dots have been developed in the last few years, and now intense research efforts have been focused on improving their functionality. In this aspect, doping and surface functionalization are two major ways to control the chemical, optical, and electrical properties of C-dots. Doping introduces atomic impurities into C-dots to modulate their electronic structure, and surface functionalization modifies the C-dot surface with functional molecules or polymers. In this review, we summarize recent progress in doping and surface functionalization of C-dots for improving their functionality, and offer insight into controlling the properties of C-dots for a variety of applications ranging from biomedicine to optoelectronics to energy.

show abstract

“…This property should be of great interest for multicolour imaging applications at cellular environment. 19,44 Using quinine sulfate (quantum yield =54%) as the reference, the quantum yield of CQDs, Pd-CQDs, and Pt-CQDs were calculated to be 10.1%, 17.8%, and 15.2%, respectively ( Figure S4). …”

Section: Photophysical Propertiesmentioning

confidence: 99%

Facile synthesis of N-rich carbon quantum dots from porphyrins as efficient probes for bioimaging and biosensing in living cells

Wang

et al. 2017

IJN

154

View full text Add to dashboard Cite

N-rich metal-free and metal-doped carbon quantum dots (CQDs) have been prepared through one-step hydrothermal method using tetraphenylporphyrin or its transition metal (Pd or Pt) complex as precursor. The structures and morphology of the as-prepared nanoparticles were analyzed by X-ray diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectra. Three kinds of nanocomposites show similar structures except for the presence of metal ions in Pd-CQDs and Pt-CQDs indicated by X-ray photoelectron spectroscopy. All of them display bright blue emission upon exposure to ultraviolet irradiation. The CQDs exhibit typical excitation-dependent emission behavior, with the emission quantum yield of 10.1%, 17.8%, and 15.2% for CQDs, Pd-CQDs, and Pt-CQDs, respectively. Moreover, the CQDs, Pd-CQDs, and Pt-CQDs could serve as fluorescent probes for the specific and sensitive detection of Fe 3+ ions in aqueous solution. The low cytotoxicity of CQDs is demonstrated by MTT assay against HeLa cells. Therefore, the CQDs can be used as efficient probes for cellular multicolor imaging and fluorescence sensors for the detection of Fe 3+ ions due to their low toxicity, excellent biocompatibility, and low detection limits. This work provides a new route to synthesize highly luminescent N-rich metal-free or metal-doped CQDs for multifunctional applications.

show abstract

Mg/N double doping strategy to fabricate extremely high luminescent carbon dots for bioimaging

Cited by 165 publications

References 27 publications

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Improving the functionality of carbon nanodots: doping and surface functionalization

Facile synthesis of N-rich carbon quantum dots from porphyrins as efficient probes for bioimaging and biosensing in living cells

Contact Info

Product

Resources

About