Unraveling the synthesis-structure-property relationship in aromatic amino acids-derived carbon dots

Carbon, Год журнала: 2025, Номер 235, С. 120073 - 120073

Опубликована: Янв. 30, 2025

Язык: Английский

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Color-Tunable CsCdCl₃ Perovskite for Low-Temperature Anticounterfeiting and Information Storage Applications

Inorganic Chemistry, Год журнала: 2024, Номер 63(34), С. 16047 - 16055

Опубликована: Авг. 14, 2024

Low-temperature anticounterfeiting technologies play a crucial role in ensuring the authenticity and integrity of temperature-sensitive products such as vaccines, pharmaceuticals, food items. In this work, low-temperature route based on differentiated photoluminescence (PL), PersL, thermally stimulated luminescence (TSL) behaviors metal halide perovskite, pure CsCdCl3, CsCdCl3:10% Te4+ is proposed. The CsCdCl3 host exhibits pronounced color shifts, encompassing PL, TSL behaviors, ranging from blue to yellow orange temperature rises 100 K room temperature. This change attributed luminous center (from D3d octahedron C3v octahedron). Conversely, addition inhibits matrix emission, maintains characteristic emission Te4+, regulates trap distribution at low TL intensity. work highlights significant promise phosphors innovative technologies, especially for cold-chain vaccine safety monitoring.

Язык: Английский

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CDs@ZnO multi-core@shell structure: Rational designed versatile platform for multiple wavelength RTP, TADF and lasing in high security anti-counterfeiting

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 159674 - 159674

Опубликована: Янв. 1, 2025

Язык: Английский

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Efficient room temperature afterglow in nitrogen doped carbon dots triggered by steric hindrance effect

Journal of Luminescence, Год журнала: 2025, Номер unknown, С. 121100 - 121100

Опубликована: Янв. 1, 2025

Язык: Английский

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Time‐Division Multiplexing Physical Unclonable Functions Based on Multicolor Phosphorescent Carbon Dots

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 13, 2025

Abstract Phosphorescent materials offer a promising approach to information encryption due their long luminescence lifetimes and high signal‐to‐noise ratios. However, fixed phosphorescent patterns are vulnerable imitation over time, limiting effectiveness in advanced encryption. Here, time‐division multiplexing physical unclonable function (TDM‐PUF) label utilizing multicolor carbon dots (CDs) is proposed that leverages variations wavelength lifetime construct time‐resolved, multidimensional cryptographic protocols. Efficient multi‐color phosphorescence CDs achieved by enhancing intersystem crossing, suppressing non‐radiative transitions through confinement effects, regulating emission spectra via energy transfer. The random spatial distribution unpredictable emissions of significantly enhance the complexity PUF system, thereby fortifying its defenses against mimicry attacks. Furthermore, this system exhibits multiple optical responses allowing correct recognition only at specified time nodes, achieving time‐resolved anti‐counterfeiting. Finally, segmenting labels based on color channels, non‐overlapping multi‐time segments achieved, enabling highly secure multiplexed study provides competitive anti‐counterfeiting inspires development novel strategies.

Язык: Английский

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Full‐Color Tunable Time‐Dependent Room‐Temperature Phosphorescence from Self‐Protective Carbonized Polymer Dots

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 14, 2025

Abstract Achieving full‐color time‐dependent tunable phosphorescence (TDTP) in pure organic materials remains a significant challenge due to the nonradiative transition and modulation puzzle of triplet states. Herein, TDTP has been realized self‐protective carbonized polymer dots (CPDs) under ambient conditions using self‐doping strategy. These CPDs are generated with dual emission centers high‐energy N‐related state low‐energy surface oxide state, which responsible for slow‐decaying blue afterglow (453 nm) fast‐decaying green red (513–609 nm), respectively. luminescent can be activated simultaneously upon CPD aggregation rigid networks by intra/intermolecular hydrogen‐band interactions. The detailed experimental characterization theoretical calculation confirm that red‐shifted color is attributed gradual reduction their energy levels increasing C═O content degree CPDs. Thus, these matrix‐free exhibit dynamic colors over entire visible spectrum solid after turning off 365 nm UV light. Based on unusual phosphorescent properties excellent photostability, have tested various applications such as multidimensional information encryption anti‐counterfeiting, well time‐delayed light‐emitting diodes (LEDs).

Язык: Английский

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Large Capacity of Data Storage and Information Encryption in Optical Encoder Disk by Integrating Phase Angle and Time Lock Based on Luminescence Metal Nanoclusters

Small, Год журнала: 2025, Номер unknown

Опубликована: Май 15, 2025

Abstract The traditional “matrix” symbol patterns from the luminescence materials are mainly involved in a 2D plane, which seriously limits information security and storage capacity. Here, novel strategy is designed to extend two additional dimensions into plane by integrating time‐gated response phase angle changes of luminescent patterns. strong orange fluorescence assemblies an optical encoder disk obtained after adding metal ions (Zn 2+ or Al 3+ ) ammonia copper nanoclusters (CuNCs) due aggregation‐induced emission (AIE) behavior. number CuNCs‐based aggregates closely related rotating changes. On contrary, these can be reversibly dissembled upon exposing adenosine triphosphate (ATP) concomitant with their quenching. Their different quenching rates on‐demand controlled coordination reaction kinetics between ATP pH value, conducive design series time‐locked information. encoding comprehensively utilize static dynamic characteristics at specific time. time double locks added form 4D models, realizes higher‐level encryption larger data

Язык: Английский

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Nitrogen-doped carbon dots with excitation-dependent room temperature phosphorescence for multi-level anti-counterfeiting applications

Journal of Luminescence, Год журнала: 2024, Номер 275, С. 120757 - 120757

Опубликована: Июнь 19, 2024

Язык: Английский

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

Small, Год журнала: 2024, Номер unknown

Опубликована: Окт. 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.

Язык: Английский

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Dual-Emission Afterglow of Carbon Dots Induced by an Inorganic Salt for Anticounterfeiting and Temperature Sensing

Langmuir, Год журнала: 2024, Номер unknown

Опубликована: Дек. 4, 2024

Afterglow carbon dots (CDs) have been extensively studied for sensing and anticounterfeiting because they can effectively block out the interference of background light. In this work, m-APBA CDs are obtained hydrothermally with m-aminophenylboric acid (m-APBA) different kinds inorganic salts (IS). When combined CaCl

Язык: Английский

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