Reversible and color-variable afterglow luminescence of carbon dots triggered by water for multi-level encryption and decryption

Han, Zichen; Li, Peng; Deng, Yuchen; Li, Huanrong

doi:10.1016/j.cej.2021.128999

Cited by 73 publications

(48 citation statements)

References 65 publications

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“…DOI: 10.1002/adom.202102666 0D luminescent material, are expected to become a candidate for traditional phosphorescent materials such as metalorganic complexes and organics due to their excellent biocompatibility, photostability, and raw materials versatility. [3][4][5][6] So far, solid CDs-based RTP has made great progress in long lifetime, multicolor emission, and dynamic changes, [7][8][9][10][11][12][13] but the interruption of phosphorescence or poor dispersion of the materials in water still limits their practical application in anti-counterfeiting and biological imaging. [14] Therefore, developing CDsbased RTP materials with good dispersion and maintaining intensive phosphorescence in aqueous environment, remains a challenging task, which has aroused great interest among researchers.…”

mentioning

confidence: 99%

Cascade Resonance Energy Transfer for the Construction of Nanoparticles with Multicolor Long Afterglow in Aqueous Solutions for Information Encryption and Bioimaging

Líu

Liu

et al. 2022

Advanced Optical Materials

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There are still huge challenges in the development of carbon dots (CDs) based long afterglow materials with multicolor emissions, especially in aqueous solutions. This work reports a novel strategy of achieving of multicolor long afterglow in aqueous solution by incorporating phosphorescent CDs and fluorescent dyes into sub‐20 nm monodispersed silica nanoparticles. The silica matrix not only stabilizes the triplet excitons of CDs but also facilitates the efficient cascade Förster resonance energy transfer between the phosphorescent donor (CDs) and the energy acceptor (fluorescent dyes), which enables intensive multicolor long afterglow with adjustable wavelength from 510 to 610 nm and the largest Stokes shift of 255 nm. Based on these multicolor long afterglow nanoparticles, some time‐resolved, color multiple information encryptions are designed. By eliminating background noise, the signal‐to‐noise ratio of in vivo afterglow imaging is as high as 155.1 in the in vivo imaging system. Interestingly, the afterglow signal in mice can be easily and conveniently collected by the camera of cell phones, which may make in vivo bioimaging portable and inexpensive. This study will provide new ideas for the synthesis of multicolor CDs‐based long afterglow materials in solutions.

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confidence: 99%

Cascade Resonance Energy Transfer for the Construction of Nanoparticles with Multicolor Long Afterglow in Aqueous Solutions for Information Encryption and Bioimaging

Líu

Liu

et al. 2022

Advanced Optical Materials

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“…With the rapid increase in information technology, information encryption and decryption/protection are essential and have attracted tremendous attention in information recording, anti-counterfeiting, and privacy protection fields. [1][2][3] As a common information-storage medium, paper is frequently used in our daily lives and all fields of research. It is mainly composed of fibers and fillers, which exhibit pore structures, where fibers function as skeletons and improve the overall mechanical properties while fillers endow paper with properties such as whiteness, smoothness, and opaqueness.…”

Section: Introductionmentioning

confidence: 99%

Paper‐Structure Inspired Multiresponsive Hydrogels with Solvent‐Induced Reversible Information Recording, Self‐Encryption, and Multidecryption

Chen

Guo

et al. 2022

Adv Funct Materials

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Information recording and encryption/decryption functions are essential due to the prevalence of counterfeiting activities and information leakage in the current age. However, the development of high-resolution information recording and multistage information protection systems to achieve high data security levels, such as self-erasing encrypted data and time-controlled data handling, remains limited. Herein, inspired by the information-recording structure of paper, a multiresponsive nanofiber-reinforced poly(N-isopropylacrylamide) (PNIPAM) hydrogel (NCPN hydrogel) with improved mechanical properties, solvent-induced high-resolution reversible information recording, self-encryption, and multi-decryption capabilities, is proposed. Due to the unique hydrophilic and hydrophobic structures of the hydrogel matrix, ethanol and other polar analogs can be applied as special inks to record information by changing the lower critical solution temperature to achieve the repeatable transmittance variation. The recorded information can be erased via water wiping or ethanol volatilization. Additionally, self-encryption can be achieved and adjusted based on the ethanol volatilization time and concentration difference, and confidential information can be further decrypted in a water environment or under a thermal stimulus. Furthermore, several stable, repeatable, and fast-response hydrogel-based information-recognition systems are designed and investigated. Therefore, the designed hydrogel-based informational platform provides a universal information-handling system allowing for the reversible recording of information, with self-encryption and multidecryption capabilities.

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“…Stimulus-responsive smart luminescent materials have attracted considerable attention owing to their broad application in the fields of data storage, anti-counterfeiting, bio-imaging, and optoelectronic devices applications. [1][2][3][4][5] Compared with conventional fluorescent systems, stimulus-responsive afterglow systems take the superiorities in extreme sensitivity, long emission lifetime and low background interference. [6][7][8][9][10] Importantly, the change in emission lifetime under external stimuli could be considered as another visual monitoring parameter in addition to emission color and intensity, which would empower this kind of material additional encryption modes in anticounterfeiting and data encryption.…”

Section: Introductionmentioning

confidence: 99%

Time‐ and Excitation Wavelength‐ Dependent Afterglow Supramolecular Assembly for Multi‐Modal Anti‐Counterfeiting Application

Zhang

2022

ChemistrySelect

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Color‐tunable smart afterglow materials in response to excitation wavelength and time simultaneously is highly important for anticounterfeiting and data encryption application, which remains a great challenge to date. Here, we provide a simple and efficient approach to develop color‐tunable afterglow supramolecular assembly AxBy@Lap in response to excitation wavelength and time simultaneously through the co‐assembly of non‐emissive nanoclay (Lap) and two different kinds of guests (A: Terephthalic acid (TPA), B: Terpyridine‐derivatives) using a simple solventless grinding method. Experimental and theoretical researches clear that the different decay lifetimes and origin for multiple afterglow emission centers bring about the aforementioned distinctive excitation wavelength‐ and time‐dependent feature. Furthermore, AxBy@Lap reveal excellent color‐tunable afterglow behavior with excitation wavelength‐ and time‐dependent feature in aqueous solution with water content of 99 wt %. Benefiting from this excellent characteristics, multi‐modal anti‐counterfeiting and encryption application were exhibited.

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Reversible and color-variable afterglow luminescence of carbon dots triggered by water for multi-level encryption and decryption

Cited by 73 publications

References 65 publications

Cascade Resonance Energy Transfer for the Construction of Nanoparticles with Multicolor Long Afterglow in Aqueous Solutions for Information Encryption and Bioimaging

Cascade Resonance Energy Transfer for the Construction of Nanoparticles with Multicolor Long Afterglow in Aqueous Solutions for Information Encryption and Bioimaging

Paper‐Structure Inspired Multiresponsive Hydrogels with Solvent‐Induced Reversible Information Recording, Self‐Encryption, and Multidecryption

Time‐ and Excitation Wavelength‐ Dependent Afterglow Supramolecular Assembly for Multi‐Modal Anti‐Counterfeiting Application

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