Journal ArticleDOI
Solvent-controlled synthesis strategy of multicolor emission carbon dots and its applications in sensing and light-emitting devices
TLDR
In this article, the authors used citric acid (CA) and Nile Blue A (NBA) as precursors to obtain bright blue, yellow and red fluorescence emission CDs (B-, Y-and RCDs).Abstract:
Carbon dots (CDs), as a new kind of carbon-based luminescent nanomaterials, have drawn widespread attention in the fields of fluorescence sensing, optoelectronic devices, and biological imaging. This work uses citric acid (CA) and Nile Blue A (NBA) as precursors. By simply changing the solvent in the reaction, their bandgaps were systematically controlled, thereby successfully obtaining bright blue, yellow and red fluorescence emission CDs (B-, Y- and RCDs). The higher quantum yield (QY) of B-, Y- and RCDs are 64%, 57% and 51%, respectively. The selected precursors and different solvents are the key to the formation of three emission CDs. Detailed characterization and density functional theory (DFT) calculations further indicate that the difference in emission color of CDs is due to the size of the sp2 conjugate domain. In addition, we used multicolor CDs as fluorescent probes to investigate their performance in detection. Among them, BCDs and YCDs can detect Sudan Red I with high selectivity and sensitivity. In the concentration range of 0 to 80 µM, the detection limits are 56 and 41 nM, respectively. Multicolor emitting phosphors and fluorescent films are also obtained by mixing CDs with other matrices. Using Ultraviolet (UV) chip as the excitation source and combining with multicolor fluorescent film and a certain proportion of B-, Y-, and RCDs/epoxy resin composites, bright monochromatic light-emitting diodes (LEDs) and white LED (WLED) with high color rendering index (CRI) were prepared. The above results indicate that the multicolor CDs prepared by us have great application potential in the fields of food safety control and optical devices.read more
Citations
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Journal ArticleDOI
A pH-controlled synthetic route to violet, green, and orange fluorescent carbon dots for multicolor light-emitting diodes
TL;DR: In this article , the authors used 2,3-diaminopyridine as a single precursor to synthesize colorful CDs in different pH conditions, by simply regulating the reaction media from alkali to neutral to acid, bright CDs emitting violet, green, and orange fluorescence, respectively.
Journal ArticleDOI
The Emerging Development of Multicolor Carbon Dots.
Jiurong Li,Xiao Gong +1 more
TL;DR: In this article , the authors present a systematic classification and summary of multiple regulation methods of synthetic multicolor carbon dots (MCDs) and review the recent research progress in the synthesis of MCDs from a variety of precursor materials such as aromatic molecules, small organic molecules, and natural biomass.
Journal ArticleDOI
Dual-stimuli responsive near-infrared emissive carbon dots/hollow mesoporous silica-based integrated theranostics platform for real-time visualized drug delivery
Zhongyin Chen,Tao Liao,Wan Lihui,Ying Kuang,Chang Liu,Duan Junlin,Xu Xiangyu,Zi-Qiang Xu,Bingbing Jiang,Cao Li +9 more
TL;DR: In this paper, a combination of near-infrared (NIR) light and lower autofluorescence of biological tissue at NIR region has gradually emerged as a promising strategy for cancer therapy.
Journal ArticleDOI
Sulfuric-acid-mediated synthesis strategy for multi-colour aggregation-induced emission fluorescent carbon dots: Application in anti-counterfeiting, information encryption, and rapid cytoplasmic imaging
Lijuan Yang,Shao Peng Liu,Tian Quan,Yongqing Tao,Meng Tian,Luchun Wang,Junji Wang,Dandan Wang,Die Gao +8 more
TL;DR: In this paper , four aggregation-induced emission fluorescent carbon dots (AIE-CDs) with blue, green, yellow, and orange fluorescence at high concentrations were fabricated using crystal violet as a precursor.
Journal ArticleDOI
Metal–Organic Framework-Activated Full-Color Room-Temperature Phosphorescent Carbon Dots with a Wide Range of Tunable Lifetimes for 4D Coding Applications
Bin Xu,Zifei Wang,Jian Shen,Jie Li,Yu Ying Jia,Tianlong Jiang,Zhenhua Gao,Xue Wang,Xiangeng Meng +8 more
TL;DR: In this paper , a host-guest approach was proposed to achieve full-color and wide-range lifetime-tunable room-temperature phosphorescence (RTP) for CD-based nanomaterials.
References
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Journal ArticleDOI
The quenching of the fluorescence of carbon dots: A review on mechanisms and applications
TL;DR: In this article, a review of various kinds of quenching mechanisms of CDs (including static, dynamic, FRET, photo-induced electron transfer, Dexter energy transfer, and inner filter effect) is presented.
Journal ArticleDOI
Near-Infrared Photoluminescent Polymer-Carbon Nanodots with Two-Photon Fluorescence
TL;DR: Near-infrared-emissive polymer-carbon nanodots possess two-photon fluorescence; in vivo bioimaging and red-light-emitting diodes based on these PCNDs are demonstrated.
Journal ArticleDOI
Engineering triangular carbon quantum dots with unprecedented narrow bandwidth emission for multicolored LEDs
Fanglong Yuan,Ting Yuan,Laizhi Sui,Laizhi Sui,Zhibin Wang,Zifan Xi,Yunchao Li,Xiaohong Li,Louzhen Fan,Zhan'ao Tan,Zhan'ao Tan,Anmin Chen,Mingxing Jin,Shihe Yang +13 more
TL;DR: This work demonstrates multicolored narrow bandwidth emission from triangular CQDs with a quantum yield up to 54–72% and synthesizes these dots showing tunable emission color, high fluorescence and a narrow FWHM of only 30 nanometers, which will set the stage for developing next-generation high-performance C QDs-based light-emitting diodes.
Journal ArticleDOI
Carbon Dots: A New Type of Carbon-Based Nanomaterial with Wide Applications
Junjun Liu,Rui Li,Bai Yang +2 more
TL;DR: This Outlook comprehensively summarize the classification of CDs based on the analysis of their formation mechanism, micro-/nanostructure and property features, and describe their synthetic methods and optical properties including strong absorption, photoluminescence, and phosphorescence.
Journal ArticleDOI
Photoluminescence tuning in carbon dots: surface passivation or/and functionalization, heteroatom doping
TL;DR: A review of the relationship between synthetic methods and photoluminescence (PL) correlative applications can be found in this article, where a series of the latest relative PL tuning mechanisms for CDs are discussed.