Endogenetic Carbon Dot Strategy within Melamine-Formaldehyde Microspheres for Multifunctional Hybrid Fluorescence/Room-Temperature Phosphorescence Applications in Dry States and Aqueous Environments DOI
Jian Qu, Xinzhe Yin, Jian-Li Shao

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 17(1), P. 1980 - 1991

Published: Dec. 26, 2024

Developing hybrid fluorescence (FL)/room-temperature phosphorescent (RTP) materials in dry-state, aqueous, and organic solvents holds paramount importance broadening their applications. However, it is extremely challenging due to dissolved oxygen solvent-assisted relaxation causing RTP quenching an aqueous environment great dependence on SiO2-based materials. Herein, efficient endogenetic carbon dot (CD) strategy within melamine-formaldehyde (MF) microspheres activate of CDs has been proposed through the pyrolysis isophthalic acid (IPA) molecules branched-chain intra-microspheres. The formation mechanism CDs@MF from with a branched chain systematically studied. Detailed investigations revealed that MF strongly construct covalent hydrogen-bonded interfacial connections, coupled protection provided by microsphere shell, greatly suppressing nonradiative decay CDs, resulting yellow or orange duration about 7 s visible naked eye, even environments. Three samples glowed bright white light stemming FL/RTP dual-mode emission quantum yield 29%–36% were successfully applied single CD-based LEDs tunable color temperature. Additionally, for water-resistant advanced anticounterfeiting time-dependent information encryption also demonstrated. It effective multifunctional solvent-resistant CD strategy.

Language: Английский

Cascade energy transfer endows phosphorescent carbon dots-based films with tunable and broadband afterglow for fingerprint recognition and anticounterfeiting DOI

Zhanpeng Liu,

Xinyi Ding, Lin Cai

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160311 - 160311

Published: Feb. 1, 2025

Language: Английский

Citations

1
Dynamic encryption enabled by circularly polarized carbon dot-based afterglow composites featuring hierarchical tri-mode thermochromic emission DOI
H. Wang,

Longming Jin,

Wanqi Mo

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162427 - 162427

Published: April 1, 2025

Language: Английский

Citations

1
Excitation-wavelength-dependent persistent luminescence from single-component nonstoichiometric CaGaxO4:Bi for dynamic anti-counterfeiting DOI Creative Commons
Bo‐Mei Liu, Yue Lin, Yingchun Liu

et al.

Light Science & Applications, Journal Year: 2024, Volume and Issue: 13(1)

Published: Oct. 10, 2024

Materials capable of dynamic persistent luminescence (PersL) within the visible spectrum are highly sought after for applications in display, biosensing, and information security. However, PersL materials with eye-detectable excitation-wavelength-dependent characteristics rarely achieved. Herein, a nonstoichiometric compound CaGa

Language: Английский

Citations

6
Carbon Dot-Based Composite with Color Excitation-Dependent Room-Temperature Phosphorescence for Advanced Optical Encryption and Anticounterfeiting DOI
Chengkun Liu,

Xiaodong Zhu,

Yu Liu

et al.

Langmuir, Journal Year: 2024, Volume and Issue: 40(42), P. 22409 - 22416

Published: Oct. 8, 2024

The phenomenon of multicolor afterglow emission has attracted considerable attention in information encryption, bioimaging, and sensing. Consequently, there is a growing demand for the development phosphorescence switching methods utilizing carbon dot (CD) materials. Herein, room-temperature (RTP) CD-based materials (PM-CD@BA composite) was achieved by developing multiple centers tuning excitation wavelength. color observed this composite covered from deep-blue to green region. experimental results reveal that under heating treatment, CDs embedded inorganic boric acid/B

Language: Английский

Citations

3
Confinement Microenvironment Regulation of Carbon Dots in Zeolite for Multi‐Mode Time‐Dependent Phosphorescence Color Evolution DOI

Siyu Zong,

Bolun Wang,

Jiani Zhang

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 19, 2024

Abstract Matrix immobilization has been proven to be a favored method for enhancing the phosphorescence of carbon dots (CDs), however, it remains significant challenge realize time‐dependent colors (TDPC) by embedding CDs with single emission center. In this study, we present novel matrix‐controlling strategy regulate microenvironment doping limited Mn 2+ in zeolite. The surrounding environment influences surface state CDs, leading formation different excitons. At low temperatures, Mn‐coordinated (C‐CDs) show fast‐decaying green phosphorescence, while non‐coordinated (NC‐CDs) exhibit inherent slow‐decaying blue phosphorescence. Notably, energy transfer occurs between NC‐CDs and produce an ultrafast‐decaying red intensity component increasing as temperature rises. interplay these luminescent centers distinct decay rates activates fascinating multi‐mode TDPC behavior changes, resulting dynamic afterglow evolutions from at 298 K, orange 273 cyan 77 K. Leveraging diverse luminescence CDs@MnAPO‐5, multi‐dimensional color pattern was developed advanced anti‐counterfeiting applications.

Language: Английский

Citations

3
Preparation of Multicolor Room-Temperature Phosphorescence Carbon Dots by Changing the Conjugation Degree of Precursors for Information Encryption DOI
Xiaopeng Wang, Mengting Ouyang, Huai‐Qian Wang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: 17(9), P. 14425 - 14432

Published: Feb. 20, 2025

Room temperature phosphorescence (RTP) materials have attracted considerable attention, because of their outstanding properties and a wide array potential applications. However, achieving control over the emission color RTP still presents certain challenges. In this article, carbon dots (CDs) three distinct colors were synthesized through simple host-guest doping strategy. Blue CDs (B-CDs) obtained by using phenylboronic acid as guest phosphors B2O3 host protect matrix, an ultralong lifetime (up to 1.597 s). Under 254 nm light excitation, blue for 14 s B-CDs can be visually observed. By increasing conjugation degree precursor molecules introducing 4-(1-naphthyl) naphthalene-1-boronic pyren-1-ylboronic phosphors, green (G-CDs) red (R-CDs) obtained, respectively. Theoretical calculations band gap analyses suggest that larger conjugated structures reduce HOMO-LUMO energy level difference, thereby causing redshift in wavelength. Last, these multicolor composite applied information encryption.

Language: Английский

Citations

0
Construction of Carbon Dot-Based Color-Tunable Circularly Polarized Long Afterglow via in Situ Phosphorescence Resonance Energy Transfer DOI
Yijie Wang, Shengju Zhou, Yi Zhao

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

Carbon dots (CDs) with circularly polarized long afterglow (CPLA) properties have received increasing attention as a cutting-edge research field. However, because the CDs both and chirality are difficult to prepare color of most phosphorescent is mainly concentrated in short wavelengths, it still formidable challenge explore facile route achieve intrinsic CD-based color-tunable CPLA materials on large scale. Herein, we developed gram-scale synthesis method via simple hydrothermal mixture boric acid, arginine, various fluorescent dyes. The tunable successfully achieved by engineering situ phosphorescence resonance energy transfer (PRET) between formed carbonization arginine some dyes those uncarbonized Finally, applications CD composites multimode advanced anti-counterfeiting information encryption were explored.

Language: Английский

Citations

0
Dual-mode thermochromic afterglow in phosphorus-doped carbon dot composites for visible light-activated information encryption DOI
Xin Bao, Xiaodong Zhu, Zhen Tian

et al.

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 690, P. 137331 - 137331

Published: March 14, 2025

Language: Английский

Citations

0
Time-Dependent Room-Temperature Afterglow of Carbon Dots Constructed by Trap-Induced Multiemission Centers DOI
Zhun Ran, Hongjie Jia, Ziting Zhong

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: April 18, 2025

Traps, due to the ability capture, store, and release charge carriers, have attracted significant attention in construction of long afterglow materials. In this study, a one-step situ calcination strategy was employed fabricate carbon dot (CD)-based composites, traps were designed as one emission centers within composite system. Upon removal ultraviolet light, materials showed time-dependent color (TDAC), with luminescent gradually changing from orange green. The study indicates that dynamic results energy transfer surface triplet state CDs. addition, CDs generated during process serve dopants, increasing number original facilitating formation new ones. Based on TDAC characteristics, we demonstrate applications anti-counterfeiting information encryption. This offers insights into development multicolor

Language: Английский

Citations

0
Full‐Color Dynamic Afterglow in Carbon Dot‐Based Materials Regulated by Dual‐Phosphorescence Resonance Energy Transfer DOI

Longyue Zhang,

Xipao Chen,

Mingyu Xin

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 18, 2024

Abstract Developing afterglow materials with wide‐range and time‐dependent colors is highly desirable but challenging. Herein, by calcinating the mixture of Rhodamine B NH 4 Al(OH) 2 CO 3 , carbon dots (CDs) are generated in situ embedded porous Al O forming CDs@Al composite, which exhibits phosphorescence (TDPCs) from blue to green after excited a UV lamp. Photophysical studies reveal that short lifetime 214 ms originates core state, while long 915 associated surface state CDs. Simultaneous activation different lifetimes induces TDPC performance. Using as donor, series long‐wavelength fluorescent dyes including 123, 6G, acceptors, epoxy resin (ER) matrix, dual‐phosphorescence resonance energy transfer system (CDs@Al ‐dye‐ER) constructed rationally regulate emission, conferring full‐color dynamic red at decay times high quantum yields up 48.2%. The fascinating properties ‐dye‐ER composites enable their successful applications multidimensional information encryption polychrome 3D artworks.

Language: Английский

Citations

3