Advanced Optical Materials
·
2021
·Vol. 10
·期 2
·2101268
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IF 9.926
Mengyao Pan,Chengyu Wang,Yuefan Hu,Xin Wang,Lei Pan,Yipeng Lin,Lei Shang,Hongbo Xu,Jiupeng Zhao,Yao Li
Invisible photonic patterns based on responsive photonic crystals show great potential in structural-color encryption. However, single inherent information (structural color) encryption/decryption means and the incomplete invisibility in normal conditions greatly limit further development in high-precision encryption. Here, a novel invisible photonic pattern encrypted/decrypted by dual optical information (structural color and brightness) is reported. It is prepared by engineering an extremely large wettability difference into the patterned and unpatterned regions of a vapor-responsive inverse opal film. The same optical properties and the distinct wettability difference between the two regions not only ensure that the pattern encrypted by structural color and brightness in the normal state can be entirely hidden under the microscope, but also ensure that it can be decoded by large color contrast (Δλ = 26–32 nm) and brightness contrast (Δ B = 48–57.6) under flowing water vapor state. The unique invisible photonic pattern, reported for the first time, can inject new life into structural color-based encryption.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jian-Qiang Zhao,Hua-Sen Shi,Le-Ran Zeng,Hui Ge,Yu-Han Hou,Xiao-Min Wu,Cheng-Yang Yue,Xiao-Wu Lei
Storage and protection of confidential information is an increasing challenge for global digital economy, which stimulates the never-ending pursuit of high-security technology to prevent information forgery and leakage. Herein, we develop a novel approach to realize controllable information encryption-decryption based on reversible photoluminescence (PL) on/off switch in 0D hybrid antimony halide. A new 0D [DPA] 3 SbCl 6 (DPA = dipropylamine) was designed as broadband green light emitter with near-unity photoluminescence quantum yield. Benefiting from invisible and non-luminescent superiorities of SbCl 3 , information encrypted by SbCl 3 pattern can′t be directly decoded upon common light excitations. Under the trigger of [DPA]Cl salt, superfast transition from SbCl 3 to [DPA] 3 SbCl 6 gives rise to highly efficient emission and thus effective information decoding. Subsequently, through methanol impregnation and desolvation strategy, luminescence of [DPA] 3 SbCl 6 can be easily quenched and recovered resulting in reversible PL on/off switching. The multiple and controllable PL emission conversion provides a dual-mode confidential information encryption-decryption technology.
研究领域:
材料科学
·
光学
·
信息安全
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DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Yanan Bu,Ting Wu,Jiji Fan,Xiuqiong Chen,Siyuan Zhao,Zhenrong Yu,Huiqiong Yan,Qiang Lin
It is a great challenge to develop information processing materials with powerful encryption/decryption functions because of the constraints of traditional materials. In this work, adamantane (Ad) groups were grafted onto poly (N-isopropyl acrylamide) (PNIPAm) to synthesize the PNIPAm derivative (Ad-PNIPAm) by radical polymerization, which was further used to fabricate the semi-interpenetrating network (IPN) composite hydrogel (Ad-PNIPAm gel) that had dual temperature and solvent response optically tunable behavior under the assisted polymerization of NIPAM and chemical crosslinking of N,N’-methylene diacrylamide (MBA). The resultant composite hydrogel exhibited sensitive solvent and temperature stimulus response, high resolution and inducible reversible information recording, self-encryption and decryption functions. By changing the grafting degree of Ad-MA in Ad-PNIPAm, the hydrophilic-hydrophobic balance of Ad-PNIPAm could be adjusted to regulate the stimulus response of Ad-PNIPAm gel. As the grafting degree of Ad groups increased, the response temperature of Ad-PNIPAm gel gradually decreased, while the solvent response sensitivity was enhanced successively. In addition, this work not only controlled the encryption and decryption process of composite hydrogels by exploring different concentrations of ethanol solutions and various organic solvents, but also extended the information confidentiality time to the maximum extent and regulated the encryption and decryption process by introducing the host-guest recognition effects of β-cyclodextrin (β-CD) and Ad. Compared with the traditional PNIPAm hydrogel, the fabricated composite hydrogel possessed a wider temperature response range and a higher solvent response threshold, which could realize information entry, encryption and decryption at low temperatures, making the PNIPAm hydrogel based information processing model more suitable for real life scenarios. This PNIPAm based composite hydrogel with multiple regulation and multiple responses exhibited great potential in the fields of information writing and encryption/decryption.
研究领域:
材料科学
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化学
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DOI
高影响因子
Nano Energy
·
2024
·
IF 16.8
He Shao,Yu Ji,Ruiheng Wang,Jing Liu,Yueqing Li,Benxin Liu,Wen Li,Yannan Xie,Linghai Xie,Johnny C. Ho,Wei Huang,Haifeng Ling
Effectively handling massive information in complex lighting conditions is crucial for security-focused machine vision, as it relies on precise image feature detection and encryption/decryption to ensure integrity and confidentiality. Traditional hardware, primarily based on complementary metal-oxide-semiconductor (CMOS) technology, struggles with the complexity of processing tasks around the clock. To address this challenge, a ternary organic heterostructure visuomorphic phototransistor was tailored for adaptive critical image processing. The light coupling induced by the porous heterostructural layer enhances the light absorption efficiency by 2.5-fold. Our phototransistor exhibits bidirectional photoresponse across the visible and near-infrared (NIR) spectral regions, enabling adaptive edge detection in varying lighting conditions with precision above 85 %. The phototransistor array facilitates image encryption/decryption with a superior accuracy of 12 %/90 % compared to existing counterparts. This ternary organic hetero-integration combines multiple response modes, enabling compact and efficient critical feature processing.
研究领域:
材料科学
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光学工程
·
机器视觉
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Mengyao Li,Haifei Wan,Jingyong Xiong,Linyu Wang,Li Yang,Li Wang,Yonghai Song
Luminescent covalent organic frameworks (LCOFs) is a promising luminescent material with huge potential for various applications because it can integrate various chromophores into its porous ordered structure. A facile and effective approach to edit LCOFs emission is very necessary but remains a challenge. Herein, a rigidity-flexibility combination strategy to edit the luminescence properties of LCOFs was proposed by using a flexible fluorescent 1,3,5-tris(phenylacetylene) benzene with propeller-like conformation as center skeleton and linkers with different rigidity and conjugation degree. Since the conjugated degree of LCOFs’ frameworks depended on conformation of propeller-like 1,3,5-tris(phenylacetylene)benzene skeleton, the emission wavelengths of 1,3,5-tris (phenylacetylene)benzene-based LCOFs could be edited by linkers to tune conjugated degree of the frameworks. These 1,3,5-tris(phenylacetylene)benzene-based LCOFs emitted blue, green, yellow, orange and red light depending on the conjugation degree caused by the effect of the linkers of melem, terephthalic dihydrazide, hydrazine hydrate and p-phenylenediamine on the conformation of central skeleton. Binary or ternary mixed 1,3,5-tris(phenylacetylene)benzene-based LCOFs were used for white emission, white light-emitting diodes and information encryption/decryption. The work provides a simple yet efficient method to systematically edit the emission behaviors of LCOFs by linker engineering.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 50
·2304377
·
IF 13.3
Yueling Lai,Yufeng Zhou,Hongjiang Liu,Tongyin Guo,Anqi Zou,Lianju Wang,Yiqing Chen,Xianglong Zhao,Kanghui Zheng,Xin Tong,Ruilin Wang
Solid-state anion exchange method is easy to handle and beneficial to improve stability of CsPbX 3 (X = Cl, Br, I) perovskites nanocrystals (NCs) with respect to anion exchange in liquid phase. However, the corresponding exchange rate is rather slow due to the limited diffusion rate of anions from solid phases, resulting in mixed-halide perovskite NCs. Herein, a fast and reversible post-synthetic quasi-solid-state anion exchange method in CsPbX 3 NCs with inorganic potassium halide KX salts/polyvinylpyrrolidone (PVP) thin film is firstly reported. Original morphology of the exchanged NCs is well-preserved for all samples. Complete anion exchange from Br − to Cl − or I − is successfully achieved in CsPbX 3 NCs within ≈20 min through possible vacancies-assisted ion exchange mechanism, under ambient conditions and vice versa. Particularly, Br − -exchanged CsPbCl 3 and CsPbI 3 NCs exhibit improved optical properties. Encouraged by the attractive fluorescence and persistent luminescence as well as good stability of the resulted CsPbX 3 NCs, an effective dual-mode information storage–reading application is demonstrated. It is believed that this method can open a new avenue for the synthesis of other direct-synthesis challenging quantum-confined perovskite NCs/nanoplates/nanodisks or CsSnX 3 NCs/thin film and provide an opportunity for advanced information storage compatible for practical applications.
研究领域:
材料科学
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纳米技术
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光电技术
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信息技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xiaojing Su,Kunquan Li,Huali Xie,Zhuohan Chen,Xuanjun Li,Wenjian Wu
Anti-counterfeiting technologies are crucial for securing the authenticity and proof of commodities, in which the optical information encryption/decryption has attracted extensive attention for its overriding advantages of visibility and convenience. Inspired by the unique transparency transformation phenomenon of Diphylleia grayi petals, a controllable hydrophilic/superhydrophobic patterned coating with water-triggered opaque to translucent transition is proposed through the construction of a superhydrophobic coating, subsequent air plasma etching under a mask, and final hydrophilic modification to introduce stable invisible patterns. The superhydrophobic region exhibits great water repellency with a water contact angle (WCA) at 157°, while the hydrophilic region quickly absorbs water with a WCA at 61°. The patterned coating presents an opaque state for the serious light scattering induced by the rough microstructure and large refractive index difference between the coating and air, while the hydrophilic patterns on the coating transform to translucent after water infiltration for the reduced roughness and close refractive indexes of the coating and water. The information revealing is rapid and reversible, and demonstrates heat and long-term stability and great reusability. The findings conceivably stand out as a new methodology to fabricate controllable superwettable coatings with optical information encryption/decryption capability for application in anti-counterfeiting.
研究领域:
材料科学
·
光学
·
表面化学
·
防伪技术
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）