Color-switchable hybrid dots/hydroxyethyl cellulose ink for anti-counterfeiting applications

Fu, Xijun; Li, Guoqing; Cai, Shaoyong; Yang, Heng; Lin, Kaiqi; He, Miao; Wen, Jiaming; Li, Houbin; Xiong, Yabo; Chen, Dongzhi; Liu, Xinghai

doi:10.1016/j.carbpol.2020.117084

Cited by 58 publications

(40 citation statements)

References 58 publications

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“…Second, hybridizing the precursor with suitable solvents and polymers could offer compatibility with conventional printing and the novel 3D printing techniques, which in turn renders patterning of the luminescent Si structures possible. As a recent example demonstration, hybrid dots of silicon and carbon combined with binders were invented as anticounterfeiting inks, which could be applied to various substrates for printing, including yarns, cotton fabric, cellulosic paper, glass, metal, silicon wafer, and PET film (Fu et al, 2021;Lyu et al, 2021). The highly saturated color of the inks could also be realized by Mie resonance of silicon nanoparticles (Sugimoto et al, 2020;Okazaki et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Thermal Disproportionation for the Synthesis of Silicon Nanocrystals and Their Photoluminescent Properties

Wang

Hong

et al. 2021

Front. Chem.

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In the past decades, silicon nanocrystals have received vast attention and have been widely studied owing to not only their advantages including nontoxicity, high availability, and abundance but also their unique luminescent properties distinct from bulk silicon. Among the various synthetic methods of silicon nanocrystals, thermal disproportionation of silicon suboxides (often with H as another major composing element) bears the superiorities of unsophisticated equipment requirements, feasible processing conditions, and precise control of nanocrystals size and structure, which guarantee a bright industrial application prospect. In this paper, we summarize the recent progress of thermal disproportionation chemistry for the synthesis of silicon nanocrystals, with the focus on the effects of temperature, Si/O ratio, and the surface groups on the resulting silicon nanocrystals’ structure and their corresponding photoluminescent properties. Moreover, the paradigmatic application scenarios of the photoluminescent silicon nanocrystals synthesized via this method are showcased or envisioned.

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Section: Discussionmentioning

confidence: 99%

Thermal Disproportionation for the Synthesis of Silicon Nanocrystals and Their Photoluminescent Properties

Wang

Hong

et al. 2021

Front. Chem.

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“…In order explore the application scenarios of the prepared CD@Eu-MOF, three uorescent substances, CD, CD@Eu-MOF and Eu-MOF, were prepared into inks according to the methods shown in the literature. [42] The three prepared inks were printed into dot matrix by screen printing, and the results are shown in Fig. 6(d).…”

Section: Actual Sample Analysismentioning

confidence: 99%

Application of CD and Eu3+ dual emission MOF colorimetric fluorescent probe based on neural network in Fe3+ detection

Zheng

Wang

Guan

et al. 2022

Preprint

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A new highly fluorescent hybrid material (CD@Eu-MOF) was synthesized by encapsulating CD (Carbon Dots) prepared from citric acid and ethylenediamine on the basis of a metal-organic framework prepared from Eu3+ and 1,2,4-benzenetricarboxylic acid. The prepared composite not only maintains the excellent fluorescence properties of CD and Eu3+ respectively, but also forms a dual-emission fluorescence system, and the system has good stability in aqueous solution. It was further used as a novel fluorescent probe for the detection of Fe3+, which can effectively exclude the interference of other metal ions from the detection, and the intensity ratio of IEu/ICD of CD@Eu-MOF material has a good linear relationship with Fe3+ in the range of 1-200 μM. In this study, computer vision and BP (Back Propagation) neural network were used to train and fit the sample data, and it was verified that the actual fluorescence color of CD has a good linear relationship with Fe3+ concentration. In addition, the BP neural network also verified that the fluorescence spectrum data of CD@Eu-MOF also has a good linear relationship with Fe3+ concentration. This study provides a new method for the fabrication of ratio and colorimetric Fe3+ fluorescence sensors, and provides a feasible solution for the simple and visual detection of Fe3+ in the environment.

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“…[17] The presence of the lattice spacings indicates that the hybrid dots are composed of the silicon and carbon spherical nanoparticles. [18] The effect of concentration of hybrid dots on optical properties of the dispersions is studied. As shown in Figure 1b, under sunlight, the dispersions of hybrid dots gradually turn yellow with an increasing concentration of the hybrid dots, as compared to the reference sample (pure water).…”

Section: Composition and Optical Properties Of The Dispersions Of Hyb...mentioning

confidence: 99%

A Straightforward Approach for High‐Level Anticounterfeiting and Antibacterial Applications Based on Photoluminescent Fibers/Yarns

Lyu

Zhao

et al. 2021

Adv Materials Technologies

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Recently, emergent luminescent fibers have attracted extensive attention due to their intriguing applications. However, developments of the luminescent fibers are severely limited by their high‐cost and low efficient manufacturing protocols including in situ growth, dry‐wet spinning, co‐electrospinning, and multistep dip‐coating. Herein, a cost‐efficient and large‐scalable approach (namely, one‐step dip‐coating) is proposed. In this work, the photoluminescent fibers/yarns are fabricated by one‐step dipping of pristine fibers/yarns in dispersions of hybrid dots (silicon/carbon). Subsequently, Janus fabrics with striking photoluminescent patterns are developed by weaving, knitting, and braiding, respectively. An innovative anticounterfeiting technique is further developed by combing the merits of the photoluminescent fibers/yarns with textile weaving methods. The designed photoluminescent patterns can endow the weaving fabrics with excellent concealment performance. As far as it is well known, it is the first time to achieve asymmetric photoluminescent patterns on two sides of the woven fabrics by this innovative technology. Additionally, the fabrics treated with hybrid dots exhibit excellent antibacterial ability against both Staphylococcus aureus and Escherichia coli. These findings can not only provide an unprecedented insight for realizing high‐level anticounterfeiting applications, but also guide to exploit versatile applications in medical care, fashion design, stage performances, trademark, and confidential documents in the future.

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Color-switchable hybrid dots/hydroxyethyl cellulose ink for anti-counterfeiting applications

Cited by 58 publications

References 58 publications

Thermal Disproportionation for the Synthesis of Silicon Nanocrystals and Their Photoluminescent Properties

Thermal Disproportionation for the Synthesis of Silicon Nanocrystals and Their Photoluminescent Properties

Application of CD and Eu3+ dual emission MOF colorimetric fluorescent probe based on neural network in Fe3+ detection

A Straightforward Approach for High‐Level Anticounterfeiting and Antibacterial Applications Based on Photoluminescent Fibers/Yarns

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