Recent advancements of solid-state emissive carbon dots: A review

Xu, Wenjun; Zeng, Fanhao; Han, Qiurui; Peng, Zhili

doi:10.1016/j.ccr.2023.215469

Cited by 38 publications

(2 citation statements)

References 173 publications

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“…In recent years, room temperature phosphorescent materials have garnered significant attention due to their ability to exhibit long-lived phosphorescent afterglow emission characteristics for over 1 s after removing the excitation source. − This has led to their widespread applications in information security, sensors, optoelectronics, and biological imaging. − However, achieving ultralong room temperature phosphorescence (URTP) remains a significant challenge due to unstable triplet excitons, solvent relaxation, oxygen-induced quenching, and inefficient intersystem crossing. − To date, research on RTP materials has primarily focused on rare-earth-metal-based materials and organic–inorganic composite materials. However, these materials possess several drawbacks such as complex preparation methods, high costs, potential toxicity, sensitivity to oxygen, environmental hazards, and poor stability. − Consequently, it is vital to design and prepare new metal-free inorganic afterglow materials that with low toxicity, excellent water solubility, ultralong lifetimes, and high quantum efficiency. , …”

Section: Introductionmentioning

confidence: 99%

Composite Carbon Dot Materials with Long Room Temperature Phosphorescence in Solid and Liquid Environments for Encryption Technologies and Biological Detection

Gao,

Zhang,

Huang

et al. 2024

ACS Appl. Nano Mater.

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This study presents an innovative approach to design room temperature phosphorescent (RTP) carbon dot composites with ultralong afterglow lifetimes in both solid and liquid states. The proposed carbon dot composites, namely, L-NCDs-BA (solid) and L-NCDs-SiO2 (liquid), were synthesized through a straightforward hydrothermal method. The solid composite achieved an afterglow lifetime of 1.63 s, while the liquid composite demonstrated a notable afterglow of 1.30 s. These values surpass most reported nonmetallic RTP materials to date. Morphological and structural analyses confirmed effective encapsulation within a boric acid matrix and a silica framework, providing protection against quenching factors. The composites displayed excitation-dependent fluorescence emission, allowing for color-tunable fluorescence. Applications in information encryption and biological detection were explored, showcasing potential in anticounterfeiting and selective sensing of L-NCDs carbon dot composites. This study provides a comprehensive exploration of the structure, photophysical properties, and applications of ultralong-lived RTP carbon dot composites. The synthesized materials offer promising avenues for advanced optoelectronic devices, anticounterfeiting technologies, and selective biological detection systems.

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Section: Introductionmentioning

confidence: 99%

Composite Carbon Dot Materials with Long Room Temperature Phosphorescence in Solid and Liquid Environments for Encryption Technologies and Biological Detection

Gao,

Zhang,

Huang

et al. 2024

ACS Appl. Nano Mater.

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“…Alongside the study on the effect of iron ions on the extinction of CQDs photoluminescence 5,6,9,14 , there is also research on the efficient production of solid-state photoluminescent CQDs 15 . Additionally, in the field of mineralogy, to detect solid photoluminescent materials present in rocks, a technique adopted is illuminating minerals with a ultraviolet light emission lamp and using photoluminescent images 16,17 .…”

Section: Introductionmentioning

confidence: 99%

Effect of Photoluminescence of Nanomaterials to Verify Corrosion in Carbon Steel

Leitão,

Lima,

Girão

et al. 2024

Mat. Res.

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The use of fluorescent nanomaterials in various fields of study has become increasingly common. In this work, the use of carbon quantum dots as a corrosion marker in carbon steel is proposed. To produce the sensor, carbon quantum dots based on ethylenediamine and citric acid were used, dissolved in a polymeric matrix. The quantum dot used showed a quantum yield of 42.34%. The nanomodified coatings emitted blue light under ultraviolet radiation lamp. However, it was observed that there is a loss of photoluminescence in the coating on the carbon steel substrate compared to the coating on the polymeric substrate, which maintained photoluminescence activity after natural exposure. Thus, it is inferred that the loss of photoluminescence may be associated with the corrosion process.

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Multicolor Afterglow Carbon Dots: Luminescence Regulation, Preparation, and Application

Zhang,

Chen,

Liu

et al. 2024

Adv Funct Materials

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Afterglow materials have attracted much attention owing to their long luminescence lifetimes, large Stokes shifts, and emission without real‐time excitation. Compared with traditional organic afterglow materials, carbon dots (CDs), as a new afterglow material, have superior properties such as easy preparation, low toxicity, and low cost. The emission color of afterglow CDs can be regulated by external factors such as excitation wavelength, temperature, and time, which is highly significant for expanding the diversified applications to make them available for biotechnology and information applications. This review summarizes the research progress of multicolor afterglow CDs in recent years, including luminescence regulation strategies, preparation methods, and applications. First, the multicolor afterglow CDs are classified into three strategies: multicolor room temperature phosphorescence (RTP), thermally activated delayed fluorescence converted to RTP, and delayed fluorescence based on Förster resonance energy transfer, and the strategies for regulating their luminescence properties are analyzed. Second, the preparation methods of achieving multicolor afterglow CDs are summarized in both matrix‐free and matrix‐confined aspects. Then, applications in anticounterfeiting and information encryption, sensing and bioimaging are introduced in detail. Finally, the future challenges and opportunities of multicolor afterglow CDs are prospected to provide ideas for their controlled design and wide application.

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Recent advancements of solid-state emissive carbon dots: A review

Cited by 38 publications

References 173 publications

Composite Carbon Dot Materials with Long Room Temperature Phosphorescence in Solid and Liquid Environments for Encryption Technologies and Biological Detection

Composite Carbon Dot Materials with Long Room Temperature Phosphorescence in Solid and Liquid Environments for Encryption Technologies and Biological Detection

Effect of Photoluminescence of Nanomaterials to Verify Corrosion in Carbon Steel

Multicolor Afterglow Carbon Dots: Luminescence Regulation, Preparation, and Application

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