Carbon Dot-Silica Nanoparticle Composites for Ultralong Lifetime Phosphorescence Imaging in Tissue and Cells at Room Temperature DOI
Wei Li, Shuangshuang Wu,

Xiaokai Xu

et al.

Chemistry of Materials, Journal Year: 2019, Volume and Issue: 31(23), P. 9887 - 9894

Published: Nov. 15, 2019

Compared to fluorescence imaging with short-lived emissive probes, the use of phosphorescent probes conveys advantage long signal persistance in time and this permits one discriminate against interference from autofluorescence. However, realization room temperature phosphorescence (RTP) that feature ultralong emission lifetimes aqueous solution is still a challenge. Here, we present rational strategy for realizing RTP air-saturated media carbon dot-based silica composites (CDs@SiO2) which as 1.64 s. The excellent properties, their small size, water solubility make CDs@SiO2 promising material biological application. We demonstrate efficient reporters both plant tissue animal cells where strong autofluorescence poses severe challenge conventional, short-lifetime probes.

Language: Английский

Ultralong lifetime and efficient room temperature phosphorescent carbon dots through multi-confinement structure design DOI Creative Commons
Yuqiong Sun, Shuting Liu, Luyi Sun

et al.

Nature Communications, Journal Year: 2020, Volume and Issue: 11(1)

Published: Nov. 5, 2020

Abstract Room temperature phosphorescence materials have inspired extensive attention owing to their great potential in optical applications. However, it is hard achieve a room material with simultaneous long lifetime and high quantum efficiency. Herein, multi-confined carbon dots were designed fabricated, enabling ultralong lifetime, efficiency, excellent stability. The multi-confinement by highly rigid network, stable covalent bonding, 3D spatial restriction efficiently rigidified the triplet excited states of from non-radiative deactivation. as-designed exhibit 5.72 s, efficiency 26.36%, exceptional stability against strong oxidants, acids bases, as well polar solvents. This work provides design principles universal strategy construct metal-free for promising applications, especially under harsh conditions.

Language: Английский

Citations

307

Synthesis, Applications, and Prospects of Graphene Quantum Dots: A Comprehensive Review DOI

Ahmadreza Ghaffarkhah,

Ehsan Hosseini, Milad Kamkar

et al.

Small, Journal Year: 2021, Volume and Issue: 18(2)

Published: Sept. 22, 2021

Abstract Graphene quantum dot (GQD) is one of the youngest superstars carbon family. Since its emergence in 2008, GQD has attracted a great deal attention due to unique optoelectrical properties. Non‐zero bandgap, ability accommodate functional groups and dopants, excellent dispersibility, highly tunable properties, biocompatibility are among most important characteristics GQDs. To date, GQDs have displayed significant momentum numerous fields such as energy devices, catalysis, sensing, photodynamic photothermal therapy, drug delivery, bioimaging. As this field rapidly evolving, there strong need identify emerging challenges recent advances, mainly because some novel applications innovations on ease synthesis not systematically reviewed earlier studies. This feature article provides comparative balanced discussion advances synthesis, Besides, current future prospects these carbon‐based nanomaterials also highlighted. The outlook provided review points out that research boundless, particularly if upcoming studies focus purification eco‐friendly along with improving photoluminescence yield production

Language: Английский

Citations

299

Carbon quantum dots: an emerging material for optoelectronic applications DOI
Ting Yuan, Ting Meng, Ping He

et al.

Journal of Materials Chemistry C, Journal Year: 2019, Volume and Issue: 7(23), P. 6820 - 6835

Published: Jan. 1, 2019

An overview of the synthesis, optical properties, luminescence mechanism, and optoelectronic applications CQDs is presented.

Language: Английский

Citations

294

Recent Advances in Synthesis, Optical Properties, and Biomedical Applications of Carbon Dots DOI

Sadat Anwar,

Haizhen Ding,

Mingsheng Xu

et al.

ACS Applied Bio Materials, Journal Year: 2019, Volume and Issue: 2(6), P. 2317 - 2338

Published: May 6, 2019

Carbon dots (CDs) are relatively new and one of the most propitious nanomaterials ever known to humanity, primarily consisting a carbonized carbon core with heteroatoms in organic functional groups attached. CDs show various fascinating properties, such as tunable excitation/emission, chemical inertness, photostability, low toxicity, good biocompatibility, ease handling, eco-friendliness. Due anomalous optical properties CDs, they have wide range applications fields bioimaging, biosensing, photocatalysis, optoelectronics, etc. In this Review, we intend cover many strides chemistry, which is an emerging paradigm, conjunction recent discoveries near-infrared fluorescence, phosphorescence, electroluminescence, chirality, antibacterial activity. Our main emphasis will be on contemporary evolution synthetic strategies, biomedical nanomedicine nanotheranostics.

Language: Английский

Citations

289

Carbon Dots with Dual‐Emissive, Robust, and Aggregation‐Induced Room‐Temperature Phosphorescence Characteristics DOI
Kai Jiang,

Xiaolu Gao,

Xiangyu Feng

et al.

Angewandte Chemie International Edition, Journal Year: 2019, Volume and Issue: 59(3), P. 1263 - 1269

Published: Nov. 12, 2019

Carbon dots (CDs) with dual-emissive, robust, and aggregation-induced RTP characteristics are reported for the first time. The TA-CDs prepared via hydrothermal treatment of trimellitic acid exhibit unique white prompt yellow emissions in solid state under UV excitation (365 nm) on off, respectively. emission powder should be resulted from formation a new excited triplet due to their aggregation, is blue fluorescence dual-emissive nature. was highly stable grinding, which very rare amongst traditional pure organic materials. To employ TA-CDs, advanced anti-counterfeiting information encryption methodologies (water-stimuli-response producing RTP) were preliminarily investigated.

Language: Английский

Citations

242

Carbon‐Based Quantum Dots with Solid‐State Photoluminescent: Mechanism, Implementation, and Application DOI
Anli Xu, Gang Wang, Yongqiang Li

et al.

Small, Journal Year: 2020, Volume and Issue: 16(48)

Published: Nov. 3, 2020

Abstract Carbon‐based quantum dots (CQDs), including spherical carbon and graphene dots, are an emerging class of photoluminescent (PL) materials with unique properties. Great progress has been made in the design fabrication high‐performance CQDs, however, challenge developing solid‐state PL CQDs have aroused great interest among researchers. A clear mechanism is basis for development light emission also a prerequisite realization multiple practical applications. However, extremely complex structure CQD greatly limits understanding CQDs. So far, variety models proposed to explain but they not unified. This review summarizes current from perspective energy band theory electronic transitions. In addition, common strategies realizing summarized. Furthermore, applications fields light‐emitting devices, anti‐counterfeiting, fingerprint detection, etc., proposed. Finally, brief outlook given, highlighting problems, directions

Language: Английский

Citations

237

UV–Vis–NIR Full‐Range Responsive Carbon Dots with Large Multiphoton Absorption Cross Sections and Deep‐Red Fluorescence at Nucleoli and In Vivo DOI
Lei Jiang,

Haizhen Ding,

Mingsheng Xu

et al.

Small, Journal Year: 2020, Volume and Issue: 16(19)

Published: April 13, 2020

Abstract Carbon dots (CDs), with excellent optical property and cytocompatibility, are an ideal class of nanomaterials applied in the field biomedicine. However, weak response CDs near‐infrared (NIR) region impedes their practical applications. Here, UV–vis–NIR full‐range responsive fluorine nitrogen doped (N‐CDs‐F) designed synthesized that own a favorable donor‐π‐acceptor (D‐π‐A) configuration exhibit two‐photon (λ ex = 1060 nm), three‐photon 1600 four‐photon 2000 nm) excitation upconversion fluorescence. D‐π‐A‐conjugated prepared by solvothermal synthesis under assistance ammonia fluoride reported endowed larger multiphoton absorption (MPA) cross sections (3PA: 9.55 × 10 −80 cm 6 s 2 photon −2 , 4PA: 6.32 8 3 −3 ) than conventional organic compounds. Furthermore, N‐CDs‐F show bright deep‐red to NIR fluorescence both vitro vivo, can even stain nucleoli tumor cells. A plausible mechanism is proposed on basis strong inter‐dot intra‐dot hydrogen bonds through NH···F facilitate expanding conjugated sp domains, thus not only result lower highest occupied molecular orbital‐lowest unoccupied orbital energy level but also MPA those undoped CDs.

Language: Английский

Citations

232

Blue, green, and red full-color ultralong afterglow in nitrogen-doped carbon dots DOI
Cunjian Lin, Yixi Zhuang, Wuhui Li

et al.

Nanoscale, Journal Year: 2018, Volume and Issue: 11(14), P. 6584 - 6590

Published: Dec. 19, 2018

A facile synthetic route to realize RGB full-color ultralong afterglow and triple-mode emissions in carbon-dot-based anti-counterfeiting inks was developed herein.

Language: Английский

Citations

211

Carbon dots derived fluorescent nanosensors as versatile tools for food quality and safety assessment: A review DOI
Xueli Luo, Yong Han, Xiumei Chen

et al.

Trends in Food Science & Technology, Journal Year: 2019, Volume and Issue: 95, P. 149 - 161

Published: Nov. 19, 2019

Language: Английский

Citations

198

Photoactivated Fluorescence Enhancement in F,N‐Doped Carbon Dots with Piezochromic Behavior DOI
Lei Jiang,

Haizhen Ding,

Siyu Lu

et al.

Angewandte Chemie International Edition, Journal Year: 2019, Volume and Issue: 59(25), P. 9986 - 9991

Published: Nov. 19, 2019

Abstract Photoactivation in CdSe/ZnS quantum dots (QDs) on UV/Vis light exposure improves photoluminescence (PL) and photostability. However, it was not observed fluorescent carbon (CDs). Now, photoactivated fluorescence enhancement fluorine nitrogen co‐doped (F,N‐doped CDs) is presented. At 1.0 atm, the intensity of F,N‐doped CDs increases with UV irradiation (5 s–30 min), accompanied a blue‐shift emission from 586 nm to 550 nm. exhibit when exposed under high pressure (0.1 GPa). show reversible piezochromic behavior while applying increasing (1.0 atm 9.98 GPa), showing pressure‐triggered aggregation‐induced range atm–0.65 GPa. The broadens versatility ambient high‐pressure conditions enhances their anti‐photobleaching.

Language: Английский

Citations

192