CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Ying Li,Jia Liu,Xiwei Qi,Aihua Mao,YongHong Ma
A series of transparent (3- x ) Sr 3 Al 2 O 6 - x Sm 2 O 3 amorphous spheres were well fabricated using an aerodynamic levitation furnace with an x -value ranging from 0 to 0.065. In the visible light region, the maximum transmittance was approximately 80% for x = 0, 82% for x = 0.025 and 85% for x = 0.055. The excitation peak located at 405 nm was the strongest. The maximum intensity of the photoluminescence spectra appeared at 0.045. The chromatic coordinates of the CIE were all in the orange region.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yalin Qin,Peikun Yan,Fuxuan Han,Yongcheng Zhang,Zonglin Lv,Chunming Zhou
The enhancement of both transparency and piezoelectric properties in transparent ferroelectric ceramics is a challenge. In this work, we prepared transparent 0.75Pb(Mg 1/3 Nb 2/3 )O 3 -0.25PbTiO 3 : x Pr 3+ ceramics by oxygen atmosphere sintering together with hot pressing sintering. When x = 1.5 mol%, a transparency of 68% @ 900 nm (close to the theoretical value ~71%) was achieved, and the piezoelectric properties increased to twice as much as those in undoped ceramics ( x = 0). The small average domain size (below 200 nm) that far below the visible light wavelength was believed to benefit light transmittance. Meanwhile, the minute amount of tetragonal component induced by Pr 3+ irons, was supposed to be responsible for the improved piezoelectric properties. These merits make Pr 3+ -doped 0.75PMN-0.25PT transparent ceramics promising functional materials for transparent piezoelectric devices.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 28
·13521-13531
·
IF 6.97
Nan Pan,Juanrong Qin,Pingping Feng,Botao Song
Fibrous materials with high light transmittance exhibit great potential in a wide range of applications; unfortunately, fabrication of such materials still remains a challenge due to the strong light scattering caused by the rough fibrous structure and the voids between fibers. Window screens are commonly used in our daily life, and their unique woven structure ensures excellent mechanical properties, while the voids between wires allow light to pass through. By learning from the architecture of window screens, we proposed a novel patterned electrospinning approach with window screen like wire meshes as collectors to deposit fibers with anisotropic thickness gradients and further to improve the optical properties. The results indicated that the obtained fibrous mats closely copied the structure of the wire meshes, and exhibited unique thickness anisotropy with most of the fibers densely packed on the wires in a small area, while very few fibers sparsely suspended in the voids over a large area. Owing to the large area of the thin region within fibrous mats, the overall light transmittance of such a well-organized mat was greatly improved as compared with that of an isotropous mat. Furthermore, by carefully investigating the microstructure of the fibrous mats and simulating the electric field distribution with the software Comsol Multiphysics, a novel needle array collector with an ultra large area of voids was designed to achieve optimal light transparency. Finally, as proof of concepts, we investigated the potential use of transparent fibrous mats as a visual wound dressing and a window dust filter, respectively.
研究领域:
材料科学
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光学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL PAPERS
·
2021
·Vol. 75
·期 8
·4093-4098
·
IF 2.097
Yu Shan,Zeng Zhiwen,Guo Cuiping,Jiang Jiu,Pei Dating,Lu Daohuan,Geng Zhijie
Traditional hyaluronic acid (HA) hydrogels are limited by many bottlenecks such as lack of the mechanical strength. In this work, we surprisingly found that with the assistance of small molecule agents (e.g., bis-acrylamide, BIS), the mechanical property of HA hydrogels could be modulated. The HA-BIS hydrogels resulted in stronger mechanical properties increasing from 5.3 kPa (HA hydrogels) to 14.5 kPa (HA-B10 hydrogels). Furthermore, the HA-BIS hydrogels exhibited extraordinary high light transmittance (nearly 100%). The introduction of small molecular agents is advantageous to enhance the mechanical properties of natural hydrogels and pave a new way for wider applications.
研究领域:
生物材料学
·
组织工程
·
医学材料
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Zuodong Liu,Qilong Shen,Yuqing Wang,Songchang Fu,Litao Yang,Xue Chen,Bing Liu,Guoqiang Yi,Bingchu Mei,Qiangshan Jing,Peng Liu
A series of PrF 3 -doped SrF 2 ceramics were fabricated by the hot-pressed (HP) sintering method. The influence of PrF 3 concentrations on the microstructure and optical characterizations of transparent ceramics was investigated. PrF 3 doping was found to have a positive effect on increasing optical transmittance . The luminescence intensity and lifetime quenching of Pr:SrF 2 ceramics at high doping concentrations were attributed to the Pr 3+ -Pr 3+ interactions through the intense CR process. The luminescence color of Pr:SrF 2 ceramics was tuned from the blue region to the reddish region, and finally to the orange region with increasing PrF 3 concentrations. The effect of sintering temperature on the optical transmittance and microstructure of Pr:SrF 2 ceramics was also measured and discussed. The highest transmittance of the Pr:SrF 2 ceramic (doped with 5 wt% PrF 3 and sintered at 950 °C) at 350 nm and 1200 nm were 90.4% and 91.9%, respectively.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Jianing Li,Xuegang Lu,Yin Zhang,Fei Cheng,Yanlin Li,Xiaoxiang Wen,Sen Yang
Smart optical materials are drawing more and more attention because of their wide application in energy conservation, wearable sensors, optical tuning, and medical devices. However, current smart optical materials, including electroresponsive, thermoresponsive, and mechanoresponsive materials, are greatly restricted in practical applications because of their long response time, complicated preparation, and high cost. This study develops a novel, magnetically tunable, smart optical material with swift and high-contrast optical switching based on one-dimensional (1D) Fe3O4@SiO2 nanochains (NCs), which have the large shape anisotropy of the 1D structure and the superparamagnetic properties of Fe3O4 particles. The material exhibited a clear transparent state when NCs were arranged parallel to the viewing direction under an applied magnetic field, whereas it showed good shielding effect when the NCs were randomly oriented upon removal of the field. The light transmittance could be dynamically adjusted over the wide range of 20–80% through a small applied magnetic field of 50–100 Oe, which is superior to most of the currently reported systems. This swift, sensitive, and reversible response is attributed to the good responsivity of magnetic NCs. Also, an effective model was proposed to explain the transmittance modulation scheme and forecast its optical potential. The large tunable range and the low triggered field make Fe3O4@SiO2 NCs an advantageous candidate for application in smart windows, optical switchers, and other fields.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 14
·11646-11653
·
IF 2.22
Shi Kai,Su Junhong,Hu Kai,Liang Haifeng
A wide-spectrum high-transmittance copper mesh was designed and fabricated for effective shielding of electromagnetic waves. Using mask lithography and chemical etching, the copper mesh can be easily fabricated. The thickness of the copper mesh is uniform, whether at the crossing section and the copper wire. The average transmittance of the copper mesh from ultraviolet band to near-infrared band (200–2500 nm) is 96%, in agreement with the designed results. The electromagnetic interference shielding efficiency (EMI SE) is to 16 dB in Ku-band. The result of X-ray photoelectron spectroscopy analysis shows that a large amount of Cu 2+ on the surface is reduced to Cu 0 and Cu + after annealing. As result, the EMI SE value of copper mesh has increased by 1.5 dB in Ku-band. We envision that the copper mesh can provide a good solution for optically transparent electromagnetic interference shielding.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Danping Wang,Erwei Cheng,Zhaoming Qu,Yingying Wang,Qingguo Wang
Ag thin films having attractive optical transmittance and effective shielding capability are usually used as a preferred choice for the transparent electromagnetic shielding windows. Whereas, the Ag films are grown primarily via an island growth (Volmer-Weber) mechanism, which greatly restricts its application. In this study, by introducing Al atoms and suitable annealing treatment, the continuous and smooth Ag thin films are successfully fabricated by magnetron co-sputtering method. The effect of annealing temperature on the microstructure, optical and electromagnetic shielding properties of the films are conducted the comprehensive and profound study. Our results indicate that the 5 mol% Al-Ag thin film annealed at 200 °C could transform into planar growth structure, and display excellent the highest optical transmittance 89.15 % at 550 nm. Meanwhile, the shielding effectiveness (SE) reaches a peak value of 28.1 dB. 500 °C is estimated as the threshold annealing temperature of Al-Ag thin film with comprehensive performances gradually declining. Moreover, the Al dopants significantly improve the thermal stability of Ag thin films than that of the pure Ag films. These findings are of important guidance for the preparation of high-quality Al-Ag thin films to meet the practical applications.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2024
·
IF 3.2
Rui Wang,Ruilan Xu,Kaipeng Zhang,Lu Gan,Xintu Lin,Shangxi Zhang,Yong Peng
Preventing the appearance of fog on transparent glass is an important issue not only in our daily lives but also in scientific research and clinical diagnosis. A zeolite molecular sieve with MFI-type structure was identified as a very promising antifog material. In this work, MFI zeolite films with different microstructures were prepared by the solvothermal secondary growth method using diols including ethylene glycol (EG), diethylene glycol (DEG), triethylene glycol (TEG), and tetraethylene glycol (tEG) as solvents. The elimination mechanism of new MFI twin crystals was demonstrated based on scanning electron microscopy (SEM), X-ray diffraction (XRD), and transmission electron microscopy (TEM) characterizations of the resulting films and the mother solutions. The twin-free MFI films with b-axis preferred channel orientation exhibited both higher light transmittance and lower haze compared with the a-&b-mix-oriented film. The employment of diol solvents facilitated the generation of a surface Si–OH group on the films, leading to the improvement of film hydrophilicity. By taking advantages of the high transparency and hydrophilicity, the b-oriented MFI films synthesized on glass substrate achieved good antifogging performance.
研究领域:
材料科学
·
光学
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2023
·
IF 6.7
Hongyan Chen,Chaoqi Liu,Shun Ou,Ruchao Pan,Yudi Wang,Yanran Mao,Jianxin Chang,Tiezheng Lv,Fumin Du,Jianpin Huang,Tian Chen
Inspired by ion-exchange technology as a means to chemical strengthening glass, alkali ions (K + ) were, herein, superficially embedded into photovoltaic (PV) glass under certain thermal treatment conditions, and the evolution of the surface morphology and roughness was evaluated. The restructured surface exhibited enhanced transmission in the UV–Vis range. Ions penetrating the glass surface induced the dissociation of tetrahedral Si–O to form a new pole pair with a new non-bridging oxygen anion. The permittivity–frequency plots indicate a reduction in the dielectric constant of the entire glass and a consequent reduction in the refractive index . These changes may be the root cause of the transmission improvement. The PV performance was evaluated using sealed 2.25 cm 2 perovskite solar cells, where current and consequent efficiency improvements are obtained. This thermal ion-invasion method is also compatible with standard anti-reflection porous SiO 2 coating in PV glass production.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Zhangyang Xu,Qixin Zhang,Yuyu Yang,Hao Wu,Yucen Xie,Yanyun Yang,Ping Feng,Jiahui Hou,Lingfu Kong,Jielei Tu
Photovoltaic glass coatings with multiple functions, such as strong broad-spectrum antireflectivity, effective self-cleaning, anti-abrasiveness, stability, and durability, have great potential for improving and ensuring the outdoor operation of photovoltaic modules . In this study, alkali-catalyzed hollow and solid silica nanoparticles were mixed at controlled ratios by sol-gel method, and the resulting solution was modified with HMDS to improve hydrophobicity , and obtain refractive indices ranging from 1.45 to 1.13. Subsequently, based on the principle of gradient refractive index, a trilayer hydrophobic antireflective (TLHA) coating was developed, comprising a top layer (n = 1.13), a middle layer (n = 1.27), and a bottom layer (n = 1.44). The TLHA coating exhibited an average transmittance of 97.77 % in the wavelength range of 380–1800 nm, with a peak transmittance of 98.97 % at 572 nm, and a hydrophobic contact angle of 144°. Additionally, after 144 h of thermal cycling and 600 abrasion cycles, the average transmittance of the TLHA coating decreased by 2.43 % and 1.63 %, respectively, in the 380–1800 nm range, and the coating's pencil hardness reached 5 H. And further application results showed that the crystalline silicon micro-modules with the TLHA coating could exhibit a 7.63 % and 5.24 % increase in J sc , as calculated from EQE and J-V curves respectively, and a 5.34 % increase in PCE , compared to modules without the TLHA coating. These results highlight the extensive applicability of the TLHA coating in enhancing outdoor photovoltaic operation efficiency, durability, and wear resistance.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2021
·Vol. 105
·期 3
·1640-1647
·
IF 3.784
Bin Han,Qianhang Luo,Pengyu Zhang,Ting Zhang,Guowu Tang,Zhe Chen,Hang Zhang,Baoan Zhong,Yunhao Zeng,Min Sun,Qi Qian,Zhongmin Yang
In the field of multimaterial optical fibers, the demand for high-performance single-crystal core glass-clad multimaterial optical fibers is increasing. However, the applications of single-crystal fibers are restricted by the complex fabrication processes and the slow growth of single-crystal materials. Here, a two-step method is demonstrated to achieve single-crystal tellurium (Te) core fibers with high crystal quality over the length of the fiber. This method starts with the thermal drawing of a fiber preform into polycrystalline Te core multimaterial fibers (precursor fibers) that are long and mechanically stable. A 532-nm continuous laser is then employed to recrystallize the Te core in the precursor fiber into a single crystal state along the entire length of the fiber. Experimental studies of these single-crystal fibers demonstrate that the single-crystal Te core fibers possess high transmittance (>90% at 2–10 μm) and high thermoelectric performance (ZT values from 0.03 to 0.13 at 300 K temperature). They are superior to previous reports and our previous work. This method works for fabricating various single-crystal fibers and has important applications in the field of optical fibers, functional fibers, and their integrated devices.
研究领域:
光学
·
材料科学
·
光电子学
✓ 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）