Advances in carbon dots: from the perspective of traditional quantum dots

Liu, Yanhong; Huang, Hui; Cao, Weijing; Mao, Baodong; Liu, Yang

doi:10.1039/d0qm00090f

Cited by 277 publications

(126 citation statements)

References 287 publications

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“…Alongside well-known light-emitting materials such as organic dyes, rare-earth elements, and semiconductor quantum dots (QDs), carbon-based luminescent nanomaterials such as carbon dots (CDs) are gaining increasing popularity currently [ 1 , 2 ]. CDs are tiny nanoparticles composed of sp 2 - or sp 3 -carbon domains and rich in oxygen- and nitrogen-containing functional groups.…”

Section: Introductionmentioning

confidence: 99%

Applications of Carbon Dots in Optoelectronics

et al. 2021

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Carbon dots (CDs) are an attractive class of nanomaterials due to the ease of their synthesis, biocompatibility, and superior optical properties. The electronic structure of CDs and hence their optical transitions can be controlled and tuned over a wide spectral range via the choice of precursors, adjustment of the synthetic conditions, and post-synthetic treatment. We summarize recent progress in the synthesis of CDs emitting in different colors in terms of morphology and optical properties of the resulting nanoparticles, with a focus on the synthetic approaches allowing to shift their emission to longer wavelengths. We further consider formation of CD-based composite materials, and review approaches used to prevent aggregation and self-quenching of their emission. We then provide examples of applications of CDs in optoelectronic devices, such as solar cells and light-emitting diodes (LEDs) with a focus on white LEDs.

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Section: Introductionmentioning

confidence: 99%

Applications of Carbon Dots in Optoelectronics

et al. 2021

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“…Carbon dots have been extensively reviewed in term of synthesis, physicochemical properties, as well as their potential applications. Here, we refer the reader to the numerous good reviews on carbon dots [72,[82][83][84][85][86][87][88].…”

Section: Carbon Dots As Nanothermometersmentioning

confidence: 99%

Carbon Dots as New Generation Materials for Nanothermometer: Review

Mohammed

Omer

2020

Nanoscale Res Lett

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Highly sensitive non-contact mode temperature sensing is substantial for studying fundamental chemical reactions, biological processes, and applications in medical diagnostics. Nanoscale-based thermometers are guaranteeing non-invasive probes for sensitive and precise temperature sensing with subcellular resolution. Fluorescence-based temperature sensors have shown great capacity since they operate as “non-contact” mode and offer the dual functions of cellular imaging and sensing the temperature at the molecular level. Advancements in nanomaterials and nanotechnology have led to the development of novel sensors, such as nanothermometers (novel temperature-sensing materials with a high spatial resolution at the nanoscale). Such nanothermometers have been developed using different platforms such as fluorescent proteins, organic compounds, metal nanoparticles, rare-earth-doped nanoparticles, and semiconductor quantum dots. Carbon dots (CDs) have attracted interest in many research fields because of outstanding properties such as strong fluorescence, photobleaching resistance, chemical stability, low-cost precursors, low toxicity, and biocompatibility. Recent reports showed the thermal-sensing behavior of some CDs that make them an alternative to other nanomaterials-based thermometers. This kind of luminescent-based thermometer is promising for nanocavity temperature sensing and thermal mapping to grasp a better understanding of biological processes. With CDs still in its early stages as nanoscale-based material for thermal sensing, in this review, we provide a comprehensive understanding of this novel nanothermometer, methods of functionalization to enhance thermal sensitivity and resolution, and mechanism of the thermal sensing behavior.

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“…Due to the inherent structural properties of 0D nanostructures in spherical or quasi-spherical geometry, they are characterized by ultra-small size, high surface-to-volume ratio, high active edge sites per unit mass. Owing to the diameter of less than 100 nm, 0D nanoparticles exhibit edge and quantum confinement effects that are closely related to the electrical, optical, biological, mechanical behavior and other intrinsic properties of the material [ 39 ]. Most size and dimension of all 0D nanoparticles have notable effects on the physicochemical and biological properties as these factors alters the specific surface area and thermodynamic characteristics of the nanoparticles.…”

Section: Dimension Plays Its Role: An Overviewmentioning

confidence: 99%

Nanocomposite Membranes for Liquid and Gas Separations from the Perspective of Nanostructure Dimensions

2020

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One of the critical aspects in the design of nanocomposite membrane is the selection of a well-matched pair of nanomaterials and a polymer matrix that suits their intended application. By making use of the fascinating flexibility of nanoscale materials, the functionalities of the resultant nanocomposite membranes can be tailored. The unique features demonstrated by nanomaterials are closely related to their dimensions, hence a greater attention is deserved for this critical aspect. Recognizing the impressive research efforts devoted to fine-tuning the nanocomposite membranes for a broad range of applications including gas and liquid separation, this review intends to discuss the selection criteria of nanostructured materials from the perspective of their dimensions for the production of high-performing nanocomposite membranes. Based on their dimension classifications, an overview of the characteristics of nanomaterials used for the development of nanocomposite membranes is presented. The advantages and roles of these nanomaterials in advancing the performance of the resultant nanocomposite membranes for gas and liquid separation are reviewed. By highlighting the importance of dimensions of nanomaterials that account for their intriguing structural and physical properties, the potential of these nanomaterials in the development of nanocomposite membranes can be fully harnessed.

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Advances in carbon dots: from the perspective of traditional quantum dots

Abstract: A brief review of CDots from the perspective of traditional QDs clarifies the basic concepts, unique characteristics and challenges.

Cited by 277 publications

References 287 publications

Applications of Carbon Dots in Optoelectronics

Applications of Carbon Dots in Optoelectronics

Carbon Dots as New Generation Materials for Nanothermometer: Review

Nanocomposite Membranes for Liquid and Gas Separations from the Perspective of Nanostructure Dimensions

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