Ultrasonic-Assisted Synthesis of N-Doped, Multicolor Carbon Dots toward Fluorescent Inks, Fluorescence Sensors, and Logic Gate Operations

Xu, Jian; Cui, Kai; Gong, Tianyu; Zhang, Jinyang; Zhai, Zhirou; Hou, Linrui; Zaman, Fakhr uz; Yuan, Changzhou

doi:10.3390/nano12030312

Cited by 49 publications

(32 citation statements)

References 68 publications

(87 reference statements)

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“…Both variants of CDs exhibited an excitationdependent fluorescence behavior like most other CDs. [31][32][33] In particular, as the excitation wavelength was changed from 310 to 400 nm, the maximum emission peak of the CDs red-shifted, and its fluorescence intensity increased and subsequently dropped. This behavior is believed to be caused by the optical selection of differently sized nanoparticles or the different surface-emission traps.…”

Section: Njc Papermentioning

confidence: 99%

Comparison of carbon dots prepared from collagen peptides using conventional hydrothermal and microwave methods

Kang

Zhao

et al. 2023

New J. Chem.

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Section: Njc Papermentioning

confidence: 99%

Comparison of carbon dots prepared from collagen peptides using conventional hydrothermal and microwave methods

Kang

Zhao

et al. 2023

New J. Chem.

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“…Moreover, CDs with diverse properties can be attained by adjusting the ultrasonic power, reaction time, ratio of carbon sources, solvents, etc. Xu et al developed the multicolour N-doped CDs from kiwi-fruit juice by the ultrasonic synthesis approach and applied these CDs in investigations of fluorescent inks, sensors, and logic gate operations [ 67 ].…”

Section: Tactics Involved In Cds Synthesismentioning

confidence: 99%

Review on Carbon Dot-Based Fluorescent Detection of Biothiols

Shellaiah

Sun

2023

Biosensors

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Biothiols, such as cysteine (Cys), homocysteine (Hcy), and glutathione (GSH), play a vital role in gene expression, maintaining redox homeostasis, reducing damages caused by free radicals/toxins, etc. Likewise, abnormal levels of biothiols can lead to severe diseases, such as Alzheimer’s disease (AD), neurotoxicity, hair depigmentation, liver/skin damage, etc. To quantify the biothiols in a biological system, numerous low-toxic probes, such as fluorescent quantum dots, emissive organic probes, composited nanomaterials, etc., have been reported with real-time applications. Among these fluorescent probes, carbon-dots (CDs) have become attractive for biothiols quantification because of advantages of easy synthesis, nano-size, crystalline properties, low-toxicity, and real-time applicability. A CDs-based biothiols assay can be achieved by fluorescent “Turn-On” and “Turn-Off” responses via direct binding, metal complex-mediated detection, composite enhanced interaction, reaction-based reports, and so forth. To date, the availability of a review focused on fluorescent CDs-based biothiols detection with information on recent trends, mechanistic aspects, linear ranges, LODs, and real applications is lacking, which allows us to deliver this comprehensive review. This review delivers valuable information on reported carbon-dots-based biothiols assays, the underlying mechanism, their applications, probe/CDs selection, sensory requirement, merits, limitations, and future scopes.

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“…In addition, three color-based tandem luminescent solar concentrators (LSCs) are further demonstrated. Xu et al [183] successfully synthesized three kinds of emission MCDs including green, chartreuse, and pink through the combination of biomass materials and chemical molecules by ultrasonic treatment of kiwifruit juice with different additives such as ethanol, ethylenediamine, and acetone. High water-soluble MCDs have strong fluorescence under 365 nm UV irradiation.…”

Section: Study On Materials Effectsmentioning

confidence: 99%

The Emerging Development of Multicolor Carbon Dots

Gong

2022

Small

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single-layer graphene or a sheet of graphene consisting of a few atomic layers. As the graphitic fragment, GQDs exhibit reserved graphitic domains (sp 2 domains). Additionally, they are usually anisotropic and have obvious and similar graphitic lattice and chemical groups in the edge or interlayer defects. The morphology of CQDs is quasi-spherical carbonic nanoparticles, and its surface has obvious lattice and chemical groups, showing the intrinsic state luminescence and quantum confinement effect of the size of CQDs. It is believed that they have crystalline core based on sp 2 and sp 3 domains mixtures. The wavelength of PL can be adjusted by adjusting the size of CQDs. CNDs have a high degree of carbonization, with some chemical groups on the surface, but usually have no obvious lattice structure and polymer characteristics. PL mainly comes from the defects/surface states and sub domain states in the graphite carbon core, without the quantum confinement effect of particle size. Therefore, CNDs are defined as quasi-spherical carbon nanoparticles (CNPs) which are mainly composed of amorphous structural core. CPDs have a polymer/carbon hybrid structure via the aggregation or crosslinking of linear polymers or monomers, which are composed of rich functional groups/polymer chains and carbon cores on the surface. CPDs not only have the excellent optical properties of traditional carbonized CDs, but also succeed the properties of polymers. Yang et al. [3] considered that the carbon cores of CPDs include several subclasses: the complete carbonized carbon cores, the paracrystalline carbon structures consisting of tiny carbon clusters with polymer backbones, and highly dehydrated cross-linked and convoluted polymer frameworks. According to the review by Yang et al., [3] it shows that the emission of most CPDs is usually excitation-dependent and these emissions may originate from different fluorescence centers and complex energy levels. The luminescence of a carbon core with a perfect graphite structure can be generated by the intrinsic emission of the carbon core, and the energy band gap can be modified by the size of the carbon core. However, since CPDs are usually imperfectly conjugated and they have a polymer/carbon hybridized backbone structure, their luminescence mechanism is different from that of conventional CDs. However, the luminescence of CPDs is also affected by the size of the conjugated π-domain, which is considered as a subdomain, that is, the fluorescence centers within CPDs are called subdomain states. Thus, carbon core luminescence can also be obtained from the subdomain emission of the conjugated As a relatively new type of fluorescent carbon-based nanomaterials, multicolor carbon dots (MCDs) have attracted much attention because of their excellent biocompatibility, tunable photoluminescence (PL), high quantum yield, and unique electronic and physicochemical properties. The multicolor emission characteristics of carbon dots (CDs) obviously depend on the carbon source precursor, reaction conditions, and...

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Ultrasonic-Assisted Synthesis of N-Doped, Multicolor Carbon Dots toward Fluorescent Inks, Fluorescence Sensors, and Logic Gate Operations

Cited by 49 publications

References 68 publications

Comparison of carbon dots prepared from collagen peptides using conventional hydrothermal and microwave methods

Comparison of carbon dots prepared from collagen peptides using conventional hydrothermal and microwave methods

Review on Carbon Dot-Based Fluorescent Detection of Biothiols

The Emerging Development of Multicolor Carbon Dots

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