ADVANCED MATERIALS
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2024
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IF 27.4
Bin Wang,Pengcheng Liu,Feifei Zhao,Bingkun Huang,Wu Zhang,Abdulhakem Y. Elezzabi,Linhua Liu,William W. Yu,Haizeng Li
Electrochromism stands out as a highly promising technology for applications including variable optical attenuators, optical switches, transparent displays, and dynamic windows. The pursuit of high-contrast tunability in electrochromic devices remains a challenging goal. Here, the first photochromic hydrogel electrolyte is reported for electro- and photo-dual responsive chromatic devices that yield a high transmittance contrast at 633 nm (ΔT = 83.1%), along with a tinted transmittance below 1.5%. Such high-contrast devices not only hold great promise for dynamic windows but also enable seamless transitions between transparent augmented reality (AR) glass and opaque virtual reality (VR) glass. These findings introduce an innovative strategy for the design of high-contrast dimmers, opening new avenues for the development of chromatic devices.
研究领域:
材料科学
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光学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2022
·
IF 6.633
Meina Yu,Tianyang Wang,Jianjun Xu,Wei Hu,Yanzi Gao,Cheng Zou,Huai Yang
The unique phase-separated microstructure has endowed polymer dispersed liquid crystals (PDLCs) with outstanding electro-optical performances. However, their applications are hampered by the high driving voltage and low contrast ratio. Attempts to optimize the materials have been made in order to reduce the driving voltage without sacrificing the contrast ratio and other features. Herein, acrylate monomers with different steric end groups were introduced to fabricate PDLCs and their effects on the electro-optical properties and microstructure were investigated. Bipolar droplet configuration was observed in all samples implying tangential anchoring conditions. It was found that the steric end group could affect the morphology of polymer matrix and the electro-optical properties. By carefully adjusting the steric group and doping concentration, the contrast ratio could be enhanced and the driving voltage could be reduced. Besides, hysteresis could also be decreased. The research offers more choices for the construction of PDLCs from material perspective, promoting their potential applications.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2024
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IF 8.1
Wenbo You,Linyunuo Lai,Jiahui Li,Yingying Zhao,Jie Tian,Liwu Zhang,Jia Hong Pan
Exploiting solid powder fluorescence holds significant potential in diverse domains including medicine and forensics. Conventional fingerprint detection methods often fall short due to low contrast, sensitivity, and high toxicity. To addressing these challenges, we present a novel method for latent fingerprint detection using fluorescent carbon dots (CDs) encapsulated into conventional or mesoporous SiO 2 colloidal spheres (CD@SiO 2 or CDs@ m -SiO 2 ) through a surface functionalization-assisted cooperative assembly process. The synthesized monodisperse CDs@SiO 2 and CDs@ m -SiO 2 spheres, with tuning particle size, adjustable porosity and pore size, and highly dispersed CDs, exhibit improved fingerprint visibility and contrast on various substrates such as glass, stainless steel, and plastic. CDs located in SiO 2 with excellent affinity effectively avoids their solid-state self-quenching phenomenon, which, coupling with mesoporous SiO 2 shell, maximumly retains their fluorescence properties. Our method demonstrates a high contrast, selectivity, and sensitivity in fingerprint detection, offering an environmentally friendly and healthy alternative to conventional techniques, and showcasing a facile route to novel solid-state CDs-based fluorescent materials for forensic analysis.
研究领域:
材料科学
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法医学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Peng Ren,Xiaodong Chen,Luetao Sun,Quanqian Lyu,Lianbin Zhang,Jintao Zhu
Invisible photonic patterns (IPPs) are photonic materials that can display hidden patterns under external stimulation and are attractive in anti-counterfeiting devices and information storage. In this work, we report a solvent-responsive invisible photonic pattern (SRIPP) with high contrast by polymerizing two monomers of acrylamide (AAm) and poly(ethylene glycol) methacrylate (PEGMA) with different solubility parameters in different regions of poly(hydroxyethyl methacrylate) photonic gels. The two regions with different solvent responsiveness can shrink and swell in the same environment, thus causing the colors of different regions of photonic gel to shift in opposite directions from the initial state. As a result, the contrast of photonic patterns is significantly improved, increasing naked-eye visualization. In addition, by introducing fluorescent substances into the photonic gel and adjusting the photonic band gap (PBG) of photonic gels, we realize the regulation of fluorescence emission and display of fluorescence patterns by utilizing different PBGs on the SRIPP. Dynamic solvent responsiveness patterns and fluorescence patterns are integrated into a photonic gel, showing great potential in information storage and multiple-mode anti-counterfeiting applications.
研究领域:
材料科学
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光学
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化学工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
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IF 6.9
Qiyu Guo,Jinming Wan,Hailong Li,Jian Hu
Excessive use of paper materials can generate issues about energy consumption and environmental destruction, thus developing rewritable materials is an effective way to alleviate this situation. In this work, a novel photochromic paper with fast photo-responsiveness was prepared by ultrasonic immersion method of organic–inorganic hybrid. It is involved in a transformation towards charge transfer complex, and the visualization process exhibits rapid color changes. The photochromic efficiency reaches 53.54 % at 688 nm under a 20 s ultraviolet light irradiation, demonstrating its fast light response. Its spontaneous fading process of the discolored material takes at least 14 h, ensuring the short-term stability of information storage as temporary reading materials. After repeating the above coloring and erasing process of 20 times, its reflectance at 688 nm still reaches 31.62 %, demonstrating excellent rewritable stability. In summary, rapid color change rate, high contrast, and excellent cyclic stability of materials provide necessary conditions for their application in modern temporary reading and optical printing fields.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 15
·8195-8207
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IF 14.511
Zhen Su,Yushu Li,Jiguang Li,Kun Li,Xincun Dou
The accurate, ultrasensitive and rapid onsite analysis of perchlorate either in water, soil or air is urgently needed for public security checking, explosive ordnance disposal, environment monitoring and forensic analysis. To achieve it, a Pt(II) terpyridyl complex-based sensing platform that can realize the onsite ultrasensitive, colorimetric and luminescent dual-mode, rapid and direct detection of perchlorate in water, soil and air was successfully developed by systematic molecular design. The high-contrast color change from pale-yellow to purple-red and turn-on mode red luminescent emission can greatly eliminate environmental fluctuations and background autofluorescence, thus enabling the detection of perchlorate more accurately, discriminatively and efficiently even in a complex environment. The excellent water-solubility of the Pt(II) terpyridyl complex and the introduction of the hydrogel matrix largely enhance the sensing capacity and achieve the direct ultrasensitive detection of perchlorate microparticulates in soil or air, with a limit of detection of 0.45 ng by naked eye and 0.02 fg by common optical microscope. The present study provides a valuable strategy for designing a Pt(II) complex-based sensor with high-contrast color change, high signal-to-noise ratio luminescence, and ultrasensitive detection ability for particulate analytes, which would shine light on the design of high-performance sensing platforms for various analytes.
研究领域:
环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Jingtao An,Wanan Cai,Wenbin Zheng,Zixiang Zheng,Xuewen Ming,Haijun Niu,Wen Wang
High contrast electrochromic (EC) materials have attracted much attention due to their great potential for applications in fields such as electronic displays, smart windows (thermal management) and adaptive camouflage. However, obtaining EC materials with high contrast and long term stability is still a challenge. Herein, we designed and synthesized a butterfly (large planar core-distorted periphery) diamine monomer (DCTPA-NH 2 ) by fusing two triphenylamine (TPA) units on edge of 7H-dibenzocarbazolyl, and prepared four polyamides (PAs) through polycondensation of the monomer with different diacids, which exhibit excellent solution processability, thermal stability, electrochemical redox reversibility. The PAs aggregate to form fibrous film. Among them, the fibrous DCTPA-SA film exhibits high contrast in visible regions (optical contrast of 85 % at 960 nm and 63 % at 555 nm) and near infrared region, fast voltage-optical response (coloring time/bleaching time, 1.5 s/2.0 s), high coloring efficiency (241 cm 2 C -1 ), and good cycling stability (optical contrast after 500 cycles is 76 % of the initial one) due to fast diffuse of ions. In addition, DCTPA-CA exhibits fluorescence (PL) quantum efficiency up to 30.1 % and is sensitive to trinitrophenol (TNP), which is expected to be applied in explosives detection. At last, DCTPA-SA fibrous film device was fabricated for EC devices, smart windows and self-adaptive camouflage models, showing promising application.
研究领域:
材料科学
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化学工程
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光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
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2023
·
IF 11.1
Jinming Wan,Jun Xu,Shiyun Zhu,Jun Li,Guangdong Ying,Kefu Chen
Preparation of reusable photochromic materials is an effective strategy to alleviate resource waste, energy crisis and environmental problems. However, some weak links (such as slow light response rate, poor cycling stability, hydrophilicity , etc.) may limit their application in specific fields. Here, an intelligent material combines the advantages of inorganic compounds and organic substances, of which rapid charge transfer enables reversible color change assembly among semiconductors, polyoxometalates (POMs) and polymers. Specifically, Keggin-structure POMs are spontaneously attached to nitrogen-containing polymer by hydrogen bonds between terminal oxygen atoms of POMs and protons of amide nitrogen. Additionally, nano-TiO 2 which acts as an extra electro donor is doped in this system. When exposed to UV light , the accelerated photoelectron transmission within the system achieves rapid color switching for a few seconds and achieves a reflection value difference of 64.12% within 60 s, displaying fast light response rate and high contrast. In addition, it also has stable cycling characteristics, with only a slight decrease in contrast after 20 times optical printing. On the premise of ensuring readability, a simple spraying treatment forms an anchorage of polydimethylsiloxane/TiO 2 layer to photochromic layer, providing this material with waterproof properties. Encouragingly, this system can be applied by air-jet electrospinning, leading to a forward leap of self-fading time for compressing to 1 h. Overall, a waterproof photochromic composite has been developed based on the pain points of this material required overcoming, exhibiting potential in the fields of rewritable materials, anti-counterfeiting materials, indicator materials, etc.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Applied Materials Today
·
2024
·
IF 7.2
Le Huy Thai,Le Thi Thanh Nhi,Truong Chau Giang,Nguyen Minh Hiep,Truong Quang Trung,Tran Quang Hung,Le Hoang Sinh
A new 3D printed multicolor Prussian blue-viologen inorganic-organic hybrid electrochromic device was successfully developed using digital light processing. Photocurable 1-(2 cyanophenyl)-1′-(2-hydroxyethyl)-[4,4′-bipyridine]-1,1′-diium (CPHEV)-based ionogel was printed on ITO glass as an electrochromic layer. The thin film of Prussian blue (PB) was electrodeposited on another ITO glass as an ion storage layer. With PB thin film, the ECDs exhibited a bleaching time 330 times faster than that of ECDs without PB. The ECD showed excellent electrochromic performance with a high color contrast ratio of 93.4 % at -2.5 V with a pulse width of 5 s. Moreover, the ECDs also exhibited multi-coloration in L*a*b* color space with the highest different color points (ΔE* ab ) value of 75.2 between the bleaching state and coloring state. A high coloration efficiency of the ECD was obtained at 296 cm 2 C -1 corresponding to 60 % of a full optical switch at -2.5 V. The 3D printed ECD was successfully demonstrated using digital light processing (DLP) with high dimensional accuracy and resolution.
研究领域:
材料科学
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电化学
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纳米技术
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光电技术
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Zemin He,Ping Yu,Jianjing Gao,Cheng Ma,Xueyan Feng,Huimin Zhang,Yuzhen Zhao,Zongcheng Miao
In this study, an effective method was demonstrated to improve the performance of polymer dispersed liquid crystal (PDLC) films by incorporating nano-sized polyhedral oligomeric silsesquioxane (POSS) particles into the polymer matrix . The thiol-functionalized POSS dispersed uniformly in the polymer phase by participating in the crosslinking reaction of epoxy and thiol monomers. Consequently, low driving voltages within the safety range were achieved by introducing POSS in percentage of 6 wt%, due to the combined effects of regulating the polymer morphology and lowering the surface energy. Moreover, the contrast ratio was improved to be higher than 300. Stability and switchability were also verified in on-off cycles, indicating its lifetime of as least 50000 cycles. In addition, the epoxy and thiol material system contributed to the outstanding mechanical strength , which could help maintain the electro-optical properties even in flexible films. This work could provide an effective approach for the optimization of PDLC films and promote their potential applications in fields such as flexible displays and smart windows.
研究领域:
材料科学
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聚合物科学
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光电子学
·
显示技术
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2025
·
IF 17.1
Yaning Xu,Chong Guo,Weiqi Qian,Chris R. Bowen,Ya Yang
Ferroelectric materials, owing to their unique optoelectronic effect and intrinsic polarization fields, are capable of accurately extract image features in outdoor lighting environments, which is highly challenging in machine vision systems. However, conventional ferroelectric-based vision sensors, confined to image sensing, incur latency and additional power consumption during data transmission. Here we report a dual-mode vision sensor based on a ferroelectric Bi x Sm 2-x O 3 film that achieves high-contrast imaging and storage functionalities. By strategically leveraging the photoelectric effect and the heat-sensitive characteristic of the ferroelectric polarization field, the polarization intensity of the ferroelectric film can be precisely modulated to achieve time-scale controllable photocurrent reversal, thereby significantly enhancing imaging contrast, while exploiting the non-volatile nature of the ferroelectric polarization to achieve an image storage functionality. The developed sensor array facilitates accurate extraction of target shape features, enabling high-contrast imaging in uneven light conditions. This integrated sensing-memory architecture establishes a new paradigm for robust machine vision systems operating in challenging environmental conditions.
研究领域:
光电子学
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铁电器件
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图像传感器
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机器视觉
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智能传感系统
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Huan Ling,Xiaowen Wu,Ke Li,Fengyu Su,Yanqing Tian,Dan Luo,Yan Jun Liu,Xiao Wei Sun
Electrochromic (EC) devices with reversible transmittance switching have promising prospects in the applications of photoelectric displays. Herein, a novel air-stable and high contrast solution-phase electrochromic device based on new viologen derivative (DPB) with A-D-A structure (A: acceptor; D: donor) was demonstrated. Devices possessed simple configuration of ITO/EC solution/ITO. Ferrocene and polycarbonate (PC) were selected as the complementary material and solvent, respectively. All of the fabrications and performance testing work were conducted in normal air condition. The DPB-based device showed deep magenta color in colored state and exhibited high optical contrast of ΔT of 72.2% (517 nm) and good coloration efficiency of 102.2 cm 2 /C at 1.8 V. The device appeared only slight degradation of ΔT (ΔT = 69.6% or retained 96.7% of its initial ΔT after 5000 s constant switching) under the normal air atmosphere, which was even better than some reported well-packaged viologen-based solution ECDs. Additionally, the UV–vis reflective spectra were also conducted to assess the reflectance property of the devices. The reflectance peak (ΔR = 2.6%) and absorption peak matched accurately, which indicated that the new viologen derivative possesses the potential application in reflective electrochromic devices.
研究领域:
材料科学
·
电化学
·
光电
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）