Multi-modal anti-counterfeiting and encryption enabled through silicon-based materials featuring pH-responsive fluorescence and room-temperature phosphorescence

Wang, Jinhua; Song, Bin; Tang, Jiali; Hu, Guyue; Wang, Jingyang; Cui, Mingyue; He, Yao

doi:10.1007/s12274-020-2781-1

Cited by 52 publications

(18 citation statements)

References 52 publications

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“…The in situ growth of MOFs on the surface of SiNPs under microwave irradiation was recently reported. [ 111 ] The obtained target MOFs@SiNPs showed pH‐responsive fluorescence and RTP, which provided advanced multimode security and achieved a higher level of anticounterfeiting information security.…”

Section: Discussionmentioning

confidence: 99%

Tuning Organic Room‐Temperature Phosphorescence through the Confinement Effect of Inorganic Micro/Nanostructures

2021

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Organic room‐temperature phosphorescence (RTP), especially ultralong organic RTP (UOP), has great application potential in emerging fields, such as flexible intelligent information encryption, optical anticounterfeiting, and biological imaging. Therefore, the studies on organic RTP and UOP have attracted extensive attention in recent years. Various strategies, such as crystallization, host–guest interactions, spatial confinement, and introducing weak forces of heteroatoms, have been used to improve phosphorescence quantum yield and lifetime. Among them, the confinement effect of inorganic micro/nanostructures can effectively promote highly stable and tunable organic RTP and UOP. Both the efficiency and lifetime of RTP for organic phosphors within inorganic micro/nanostructures can be improved by the confinement of inorganic frameworks, together with interactions between organic and inorganic components. Herein, the recent progress in the RTP and UOP of organic molecules assembled in micro/nanostructures of organic/inorganic hybrid materials is summarized, including low‐dimensional metal halides, metal−organic frameworks with ordered nanochannels, silica nanocomposites with micro/nanopores, and layered nanoclays. In particular, the characteristics of each hybrid structure which are beneficial for RTP are highlighted. Finally, future directions of each hybrid material are suggested to continue to expand this area of research.

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Section: Discussionmentioning

confidence: 99%

Tuning Organic Room‐Temperature Phosphorescence through the Confinement Effect of Inorganic Micro/Nanostructures

2021

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“…Smart materials exhibit obvious changes under stimuli, such as light, electricity, mechanical force, heating, pH, and their combinations. [17][18][19][20][21][22][23][24][25] Specically, some remarkable reports have achieved multiple transformations of output in response to the stimulus input, rather than just output in a static form, which could further realize multilevel security. [26][27][28][29] Consequently, to simultaneously satisfy the requirements of high capacity information storage and anticounterfeiting, a suitable medium needs to meet at least two criteria: (1) expansion of 2D physical space to multidimensional space, and (2) multilevel transformations under stimulation.…”

Section: Introductionmentioning

confidence: 99%

Simultaneously achieving high capacity storage and multilevel anti-counterfeiting using electrochromic and electrofluorochromic dual-functional AIE polymers

Lü

Wang

et al. 2021

Chem. Sci.

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“…The smart materials exhibited obvious change under the stimulus, such as light, electricity, mechanical force, heating, pH, and their combinations. [14][15][16][17][18][19][20][21][22] Especially, some remarkable works achieved multiple transformations of output in response to the stimulus input, rather than just output in a static form, which could further realize multilevel security. [23][24][25][26] Consequently, in order to simultaneously achieve the requirements of high capacity information storage and anti-counterfeiting, a suitable medium needs to meet at least two criteria: (1) the expansion of 2D physical space to the multidimensional space, and (2) the multilevel transformations under stimulation.…”

Section: Introductionmentioning

confidence: 99%

Simultaneously Achieving High Capacity Storage and Multilevel Anti-Counterfeiting Using Electrochromic and Electrofluorochromic Dual-Functional AIE Polymers

Li¹,

Wang²,

H³

et al. 2021

Preprint

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With the advent of the big data era, information storage and security are becoming increasingly important. However, high capacity information storage and multilevel anti-counterfeiting are typically difficult to simultaneously achieve. To address this challenge, herein, two electrochromic and electrofluorochromic dual-functional polymers with aggregation-induced emission (AIE) features are skillfully designed. Upon application of voltage, the absorption and fluorescence spectra of the two polymers can undergo reversible changes, accompanying with the variation of appearance color and emission. By utilizing the controllable characteristics of polymers, the dual-mode display devices are fabricated via a simple spraying method. More interestingly, the color code device was elaborately constructed by adding color change multiplexing to two-dimensional space, thereby achieving high capacity information storage. Moreover, the color code device can also be applied in the multilevel anti-counterfeiting areas. The encrypted information can be dynamically converted under different voltages. The AIE polymers show great promise in the applications of multidimensional information storage and dynamic anti-counterfeiting and the design strategy may provide a new path for advanced information storage and high security technology.<br><div><br></div>

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Multi-modal anti-counterfeiting and encryption enabled through silicon-based materials featuring pH-responsive fluorescence and room-temperature phosphorescence

Cited by 52 publications

References 52 publications

Tuning Organic Room‐Temperature Phosphorescence through the Confinement Effect of Inorganic Micro/Nanostructures

Tuning Organic Room‐Temperature Phosphorescence through the Confinement Effect of Inorganic Micro/Nanostructures

Simultaneously achieving high capacity storage and multilevel anti-counterfeiting using electrochromic and electrofluorochromic dual-functional AIE polymers

Simultaneously Achieving High Capacity Storage and Multilevel Anti-Counterfeiting Using Electrochromic and Electrofluorochromic Dual-Functional AIE Polymers

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