Tunable multimodal printable up-/down-conversion nanomaterials for gradient information encryption

Wu, Youfusheng; Xue, Enbo; Tian, Bin; Zheng, Ke; Liang, Jing; Wu, Wei

doi:10.1039/d2nr01380k

Cited by 9 publications

(11 citation statements)

References 70 publications

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“…Realizing the final application is the value of a material. 110,126,127,[144][145][146][147][148][149][150] information encryption, 113,115,118,119,121,123,128,[151][152][153][154][155][156][157][158][159][160] sensor detection, 114,124,129,130,147,[161][162][163][164][165][166][167][168][169][170][171][172][173][174] LEDs, [175][176][177][178]…”

Section: Applicationsmentioning

confidence: 99%

Evolution and fabrication of carbon dot-based room temperature phosphorescence materials

Gong

2023

Chem. Sci.

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Section: Applicationsmentioning

confidence: 99%

Evolution and fabrication of carbon dot-based room temperature phosphorescence materials

Gong

2023

Chem. Sci.

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“…The proposed strategy can be extended to other CDs‐based security systems. [ 106 ] Moreover, a very interesting study shows that by designing energy transfer processes from upconversion nanoparticles (UCNPs) to CDs, near‐infrared excited multicolor RTP emission is proposed. The authors mixed Yb 3+ /Tm 3+ co‐doped NaYF 4 UCNPs with CDs to prepare their composites.…”

Section: Multilevel Information Encryption and Safetymentioning

confidence: 99%

“…As shown in Figure 10b, apparent information including the numeral patterns of "888888" and "$100", as well as the logo of Moutai Liquor only is observed with blue FL emission under the 365 nm excitation. encrypted information including digital patterns of "315201" and "$100", as well as the logo of Moutai Liquor are identified through green RTP emission after [106] Copyright 2022, The Royal Society of Chemistry. c) RTP images, information storage, and encryption applications under UV and NIR excitations.…”

Section: External Stimuli Activated Security Strategiesmentioning

confidence: 99%

Section: Multilevel Information Encryption and Safetymentioning

confidence: 99%

“…b) Integrated QD code security patterns based on FL, RTP, and UCL under the 365 nm light and 980 nm laser light excitations. Reproduced with permission [106]. Copyright 2022, The Royal Society of Chemistry.…”

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confidence: 99%

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Multiple Stimuli‐Response Polychromatic Carbon Dots for Advanced Information Encryption and Safety

Chen

2023

Small

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the requirements of the market because counterfeiters have very sophisticated techniques to replicate current anticounterfeiting techniques. [2] Thereby, the development of advanced information encryption and anti-counterfeiting strategies that are difficult to replicate is of great significance and has an irreplaceable position in practical application. Based on this background, stimuli-response information encryption and anti-counterfeiting techniques are proposed to achieve high information encryption and anti-counterfeiting strength. Important encoding information is stored and read out in an "on-off" way by altering the stimulation situations. By screening different stimulus conditions, the researchers found that light-induced tunable optical output possesses the advantages of easy operation and promotion, fast detection speed, and low cost, and has great potential in practical applications. [3] It is well-known that optical materials are a typical example, which can be excited by different light sources and then produce controllable optical output. By designing various

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One‐Step Fabrication of New PCPNs with Unique Optical Responses for Ultra‐Stable Anti‐Counterfeiting Labels

Chen,

Wu,

Tian

et al. 2024

Adv Funct Materials

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Constructing a library of stable phosphors with unconventional fluorescence (FL) and room temperature phosphorescence (RTP) color combination is an effective approach to enhance anti‐counterfeiting strength, but remains a challenge. Herein, a one‐step strategy is proposed to fabricate ultra‐stable CsPbX3/carbon dots (CDs) @NH4AlP2O7 (X = Cl, Br, and I) nanocomposites (PCPNs) with full‐spectrum FL emission and constant short‐wavelength blue RTP emission, breaking the conventional luminescent properties that RTP generally exhibit obvious wavelength red‐shifts compared with FL. The enhanced full‐color (457–612 nm) FL emissions are implemented by adjusting halogen compositions, which is attributed to CsPbX3 as the dominant FL center. Owing to the RTP emission of CDs, constant long‐lived blue RTP emission lasting 12 s is observed from PCPNs. Additionally, the PCPNs exhibit remarkable tolerance to prolonged ultraviolet irradiation and erosion by solutions with various pH and solvents, supported by NH4AlP2O7 inert shell stabilizing the perovskite structure and triplet state. When the anti‐counterfeiting ink based on PCPNs is printed on various substrates, fine anti‐counterfeiting labels with unconventional emission combinations of FL and RTP are formed and show excellent solvent resistance and mechanical stability. This study provides fresh perspectives on the development of anti‐counterfeiting labels with enhanced security strength and long‐term effects.

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Tunable multimodal printable up-/down-conversion nanomaterials for gradient information encryption

Abstract: Phosphor-based security technique has received widespread attention because it can rely on fascinating optical properties (including multicolor emission and various luminous categories) to meet information protection requirements. Carbon dots (CDs)...

Cited by 9 publications

References 70 publications

Evolution and fabrication of carbon dot-based room temperature phosphorescence materials

Evolution and fabrication of carbon dot-based room temperature phosphorescence materials

Multiple Stimuli‐Response Polychromatic Carbon Dots for Advanced Information Encryption and Safety

One‐Step Fabrication of New PCPNs with Unique Optical Responses for Ultra‐Stable Anti‐Counterfeiting Labels

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