ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 29
·2401490
·
IF 18.5
Bolong Wang,Bo Ma,Ke Wang,Huijie Zhang,Zeqi Zhang,Tao Song,Shuyan Wang,Mingzhu Chen,Shiji Li,Qiang Wang,Hao-Li Zhang
The compelling demand for laser protection both for civil and defense use calls for new-generation nonlinear optical materials. Chemical vapor deposition (CVD) techniques provide extra tricks to modulate crystal optical nonlinearity through fractal growth. The synthesized 2D NbSe 2 and its fractal structures exhibit giant, broadband laser attenuation behaviors extending into the near Infrared (NIR) range. Particularly, the optical limiting performance generally correlates with the fractal dimension, where Fractal NbSe 2 demonstrates enhanced third-order optical nonlinearity at a huge nonlinear absorption coefficient of 9.7 × 10 −4 m W −1 and an ultralow starting threshold of 5 mJ cm −2 at 532 nm. Various techniques include femtosecond spectroscopy, Density functional theory (DFT) calculation and Kelvin probe force microscopy disclose the origin of the strong nonlinearity of the 2D NbSe 2 crystals, and suggest the formation of edge states and overall faster carrier dynamics, larger surface contact potential difference NbSe 2 fractals contribute to their even augmented nonlinear responses. Fractal engineering thus opens new avenues to fabricate highly efficient laser protection materials, and the blocking of intense beam (a large attenuation factor over 13.3 dB at 532 nm) while allowing transmission of weak one (a high linear optical transmittance over 80%) fulfills the much desired “smart” defense.
研究领域:
材料科学
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光学
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凝聚态物理
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DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 13
·3079
·
IF 3.1
Bo Gao,Xuhui Zhao,Lijiao Yang,Lihe Yan,Tao Lin,Jinhai Si
With the wide application of laser weapons, the requirements of laser protection technology are becoming more and more strict. Therefore, it is important to find ideal optical limiting (OL) materials to protect human eyes and detectors. In this work, the nonlinear optical responses of gold nanoparticles/porous carbon (Au NPs/PC) nanocomposites prepared by the reduction method were studied using the nanosecond Z-scan technique. Compared with porous carbon, the Au NPs/PC nanocomposites show a lower damage threshold, a bigger optical limiting index and a wider absorption spectrum. The interaction between gold nanoparticles and porous carbon enhances the nonlinear scattering effect of suspended bubbles. These results indicate that Au NPs composites have potential applications in the protection of human eyes and detectors.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Zijun Li,Shuo Wang,Mengqing Zhang,Jiayi Zheng,Tong Zhang
With the rapid development of laser technology, the safety of human and equipment is increasingly threatened by high-power laser. However, there are not any high-power laser protection materials without flame and smoke during irradiation. In this study, we investigated a series of RE 2 Ti 2 O 7 (RE = Y, La, Sm, Eu, Yb) ceramics with high reflectivity and low thermal conductivity and evaluated their laser ablation behaviors. The results showed that all RE 2 Ti 2 O 7 have high reflectivity comparable to that of metals, and their thermal conductivity is lower than 8YSZ. Laser ablation results showed all coatings were intact after irradiation under 500 W/cm 2 for 10 s. Even after irradiation under 1000 W/cm 2 for 10 s, no significant changes were observed in the Y 2 Ti 2 O 7 and La 2 Ti 2 O 7 coatings. Further exploration determined that the protection threshold of Y 2 Ti 2 O 7 was 84 s while that of La 2 Ti 2 O 7 was 163 s, indicating its superior laser protection capability. In conclusion, La 2 Ti 2 O 7 shows significant potential in high-power laser protection.
研究领域:
材料科学
·
激光技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yunyu Zhao,Song You,Jiaojiao Fang,Haitong Liu,Lei Zhou,Yuhui Xu,Yaru Ni,Liang Fang,Chunhua Lu,Zhongzi Xu
Skin-like wearable devices have great potential in the era of intelligence. In addition to common electronic devices, flexible photonic devices are receiving ever-increasing attention, while intelligent features of devices such as self-healing are also requested. In this work, a smart skin-like wearable photonic device constructed by combining inorganic optical materials and self-healing polyurethanes is reported. Polyurethanes with skin-like modulus are synthesized by mixing chain extender, cross-linker, and hindered phenol AO-70, demonstrating fast self-healing capability (healing efficiency of 99 % within 2 min) and good shape memory effect (shape fixation rate of 90 %). A series of flexible photonic devices are prepared by depositing optical materials on polyurethane surfaces by physical vapor deposition (PVD), with a focus on a photonic device for 1064 nm laser protection. Notably, the device exhibits a spectral recovery rate of 91.76 % after 150 % strain and a spectral recovery rate of 98.13 % after healing in 2 min, indicating superior stretchability and fast self-healing ability. This work provides a new strategy for smart skin-like wearable flexible photonic devices.
研究领域:
材料科学
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光学工程
·
智能设备
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jiayi Zheng,Zijun Li,Mengqing Zhang,Lihong Gao,Tong Zhang
With the rapid development of laser technology, the protection of high-energy lasers has received increasingly widespread attention. The current laser protection methods only have single function, and do not consider the detection technology. Based on this, this article proposes a bilayer coating system that combines invisibility and high energy laser protection performance. For surface layer, four types of carbon materials were used as fillers and two types of resins were used as base materials. For the bottom layer, both YSZ block and YSZ plasma sprayed coating were used. The results show that the carbon material in surface layer react with oxygen rapidly under laser irradiation conditions, achieving the rapid transition from invisible state to laser protection state. This bilayer coating has simple process and low cost, leading to great application value. Meanwhile, this method also provides inspiration for the design and preparation of other multifunctional coatings .
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2020
·
IF 3.286
Yao Lu,Shan Wang,Chuanxi Xiong,Guo-Hua Hu
This work presents a method for the synthesis of a liquid-like polythiophene (L-Pth) by chemical oxidative polymerization of thiophene in dichloromethane. FeCl 3 was used as an initiator and nonylphenol polyoxyethylene ether (NPES) as a dopant . The structures and physicochemical properties of the L-Pth were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), fluorescence spectroscopy and ultraviolet-visible photometer (UV–vis). Unlike conventional polythiophene, L-Pth is composed of NPES and polythiophene, and part of NPES is doped on the thiophene backbone. It exhibits a liquid-like behavior at room temperature. It is typical of a semiconductor with a relatively high electric conductivity of 1.2 S m −1 . Moreover, it turns high-energy blue light (in the ranges of 400–480 nm) into relative low-energy green light (peak at 515 nm), which makes it a potential filler for preparing a blue light protection film for eyes protection. The combination of the liquid behavior, excellent solubility and good electric conductivity also makes it a promising precursor for applications such as lightweight battery, super capacitor and anti-corrosion of metals.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yuang Chen,Yang Zou,Lili Zhao,Zijian Lei,Nan Wang,Lixin Song
Laser stealth and laser protection are a contradictory due to the opposite requirement in reflectivity. Introducing nonequilibrium surface oxygen vacancy into high-reflectivity materials is a method to compatibly realize laser stealth and laser protection. Herein, nonequilibrium surface oxygen vacancy is introduced into the titanium-based perovskite materials (CaTiO 3 , SrTiO 3 , BaTiO 3 ) producing high-absorption materials with reflectivity below 10%, and the materials possess an optical transformation property. The distribution of the oxygen vacancy is characterized by TEM and EELS, and a core-shell structure is observed, with a disordered shell covering a crystalline core. Under laser irradiation, the materials can transform to high-reflectivity state and reflect most of the laser energy to prevent laser damage. Among these materials, BaTiO 3 possesses the fastest transformation rate of 2000 ms and the highest reflectivity of 70%, which is ascribed to the low thickness of the disordered shell and the fast diffusion coefficient of the oxygen atom.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Physics Research
·
2024
·Vol. 3
·期 7
·2400032
·
IF 0
Longchuang Li,Yuan Li,Tao Zhang,Yan Li,Zijian Li,Hong Bi
High-energy blue light is highly detrimental to health as it can penetrate the lens into the retina, potentially causing atrophy or even death of retinal pigment epithelial cells. To prevent the harmful effects of high-energy blue light on our health, here the preparation of a photoconversion film specifically designed to block high-energy blue light is reported, which is composed of green-emissive carbon dots (G-CDs) with a high photoluminescence quantum yield (PLQY = 95%) dispersed in polyvinyl alcohol (PVA) matrix. Notably, such a film (named as G-CDs@PVA) not only converts an incident laser light with a short wavelength into a fluorescence with a longer wavelength, but also exhibits concentration-dependent (0, 10, 20, and 30 wt.%) blue light barrier rate and green-emissive intensity. With the increase of the concentration of G-CDs in the film, the blue light barrier rate of the film as well as the maximum intensity of the green emission are also increased. When the concentration of G-CDs reaches 30 wt.%, the blue light barrier rate of G-CDs@PVA achieves up to 97%. Furthermore, G-CDs@PVA film is attached to a blue light-emitting diode (LED) chip to explore its practical application in the field of blocking blue light damage.
研究领域:
生物医学工程
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材料科学
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光学
✓ 已验证
DOI
FIBERS AND POLYMERS
·
2019
·Vol. 20
·期 11
·2289-2296
·
IF 1.439
Li Chunli,Ma Wei,Ren Xuehong
In this study, 2-(2-hydroxy-4-acryloyl)-2H-benzotriazole (BTHA), a benzotriazole ultraviolet absorber monomer, was synthesized from 2-(2,4-dihydroxyphenyl)-benzotriazole (BTDP) and acryloyl chloride. The synthesized BTHA was characterized by 1 H-NMR, FTIR, and ultraviolet spectroscopy, and grafted onto polyester fabrics by the traditional pad-dry-cure (PDC) process. The effects of monomer concentration and initiator concentration on the UPF values of the grafted PET fabrics were studied. The grafted fabrics were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). The breaking strength of the grafted PET fabrics was comparable with the original PET fabrics in warp and weft directions. The UV protection factors improved significantly after grafting. The modified PET fabrics exhibited good durability to washing. The grafting of BTHA onto PET fabrics protected the damage of UV light to PET fabrics and decreased the strength loss of PET fabrics after UVA light exposure.
研究领域:
材料科学
·
纺织工程
·
高分子化学
✓ 已验证
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 6
·1271
·
IF 4.2
Jingjing Wang,Fulai Liu,Yunfei Li,Long Chen,Yong Chen,Hailong Zhang,Zheng Xie
Although laser technology brings convenience to production and daily life, it also causes high-energy damage. Therefore, there is an urgent need to develop optical limiting materials for laser protection. In this study, a novel nonlinear optical material, red/black phosphorus lateral heterojunction, is successfully prepared through solvothermal and ultrasonic treatment. Using the Z−scan method, the nonlinear optical properties of the red/black phosphorus heterojunction are determined at wavelengths of 532 and 1064 nm. These results indicate that the red/black phosphorus heterojunction exhibits reverse saturable absorption properties in 1.2.3-glycerol. Interestingly, the red/black phosphorus heterojunction shows an enhanced performance over red phosphorus by introducing the black phosphorus phase. Moreover, the red/black phosphorus heterojunction is doped into organically modified silicate gel glass with excellent broadband optical limiting performance. This study highlights the promising prospect of the red/black phosphorus heterojunction in the nonlinear optical and optical limiting fields.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2016
·
IF 4.055
Yingliang Liu,Zhenru Zhang,Xuemei Chen,Shengang Xu,Shaokui Cao
Soluble dithiolene nickel complexes are designed and synthesized as near-infrared (NIR) absorbing dyes through the introduction of strong electron-donating groups at the molecular periphery. The resulting complexes are characterized by 1 H/ 13 C NMR, IR, ESI-MS, UV–vis–NIR, TG , DSC , XPS and elemental analysis . The identification results are in accord with the chemical structure of designed dithiolene nickel complexes. The XPS results suggested that the dithiolene ligands in carbazole-containing nickel complex take a radical monoanion, which depends on the substituent electron-donating ability to a large extent. The TG and DSC measurements indicated that the resulting complexes have an excellent thermal stability and take on a glassy state at low temperature. The laser transmittance measurement suggested that the optical filters fabricated through static solution-casting approach with dithiolene nickel complexes as NIR absorbing dyes could be well applied to the NIR laser protection at 1064 nm.
研究领域:
材料化学
·
光学材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2020
·
IF 2.726
Yu-Jun Guo,Er-Xia Chen,E. Yang,Qipu Lin
As lasers are used more extensively, protection from lasers is becoming increasingly important. Human eyes and many optical sensors are so sensitive to 532 nm wavelength lasers that laser protection at this wavelength is extremely critical. We demonstrate here that a series of exceptionally stable and isoreticular zirconium-polyphenolate-porphyrin frameworks, ZrPP- n -H 2 ( n = 1, 2) and ZrPP-1-M (M = Fe, Ni, Cu, Zn, Mn and Co) exhibit nonlinear optical (NLO) limiting properties. Compared with ZrPP-1-H 2 at the same transmittance , there was no obvious improvement of NLO limiting performance for the extended version of ZrPP-2-H 2 . However, the NLO limiting behaviors were greatly improved when ZrPP-1-H 2 involved chelated metal ions , especially Mn or Co ions in a porphyrin ring. Our results indicate that while the NLO limiting effects may not be improved by extending the ligand for metalloporphyrin-based networks, but they can be greatly improved by the introduction of the appropriate metal ions into a porphyrin core. This work may provide a new insight into laser protection by microporous coordination materials.
研究领域:
材料科学
·
光学
·
化学
✓ 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）