COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Weiwei Su,Juanjuan Yin,Ran Wang,Mengqian Shi,Ping Liu,Zhihui Qin,Ruirui Xing,Tifeng Jiao
At present, fluorescent hydrogels have attracted more and more attention due to their wide applications in medical diagnosis, biological imaging and drug delivery. However, the luminescence of traditional fluorescent hydrogels usually requires specific fluorophores, and most of the fluorophores were rigid planar structures containing benzene rings or heterocyclic structures, making traditional fluorescent hydrogels have higher cytotoxicity and lower water solubility, thus limiting their practical applications. Here, we reported a fluorescent hydrogel, which can generate hydrogen bonds without emitting specific fluorophores, and it was found that the fluorescence intensity could be strengthened with the increase of concentration. At the same time, the fluorescence emission peak has the response of excitation wavelength and is not affected by the pH and concentration. Therefore, this special discovery in present work opens new application prospects for fluorescent hydrogels.
研究领域:
材料科学
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生物医学工程
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分子生物学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2025
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IF 5.6
Litao Lin,Tengchao Guo,Yu Chen,Xiaochi Lu,Bin Quan,Xiaogu Huang
The advancement of hyperspectral detection technology has challenged the development of hyperspectral camouflage materials. Despite the high spectral similarity of existing bio-inspired hyperspectral materials, their poor weather resistance limits their application in harsh environments. To address this, it is essential to enhance the weather resistance of hyperspectral materials while maintaining high spectral similarity. Therefore, inorganic hyperspectral materials are employed to improve durability. However, these inorganic materials generally exhibit lower spectral similarity and insufficient near-infrared reflectance, which restricts their ability to match the spectral characteristics of diverse plant backgrounds. To enhance spectral and color similarity with green plants, this study investigates Cr 2-x Ti x O 3 , which exhibits low visible reflectance and high near-infrared reflectance. The impact of annealing temperature on reflectance (400–1300 nm) was assessed using SEM, XRD, XPS, and UV–Vis–NIR spectroscopy. The influence of free carrier concentration and particle size on reflectance was analyzed. Hyperspectral coatings based on Cr 2-x Ti x O 3 were prepared, demonstrating tunable hyperspectral reflectance. Results indicate that Cr 2-x Ti x O 3 annealed at 1100 °C has the highest near-infrared reflectance, largest red-edge slope, and tunable range, with low visible reflectance. Ultimately, the optimized spectral similarity of these coatings can reach 97 %, coupled with superior environmental durability.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2025
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IF 4.6
Meng Zhao,Tianbao Zhao,Tao Cheng,Zihan Su,Jiayi Zheng,Zhiming Liu,Linhua Liu,Jia-Yue Yang
The quest for biomimetic materials that emulate the solar spectral response of green plants has garnered substantial attention. Herein, we combined density-functional theory with on-site Coulomb corrections and spectroscopic ellipsometry to obtain the complex dielectric functions of chromium oxide (Cr 2 O 3 ) pigment and polyurethane (PU) binder, respectively. Based on the Lorenz-Mie scattering theory and two-flux method considering anisotropic scattering, we systematically studied the regulatory mechanism of particle structural parameters on the reflectance spectrum of the biomimetic coating. The results show that optimizing the structural parameters of Cr 2 O 3 particles reproduces the canonical vegetation features in the visible-near-infrared region. Coating reflectance decreases monotonically with both increasing particle volume fraction and larger mean radius. Additionally, the slope of red edge can be independently tuned by the particle size distribution, i.e. a larger proportion of small particles steepens the red-edge slope. This study provides a theoretical basis and data support for further optimizing the similarity between biomimetic coatings and natural vegetation in terms of their hyperspectral images in the visible-near infrared spectral range.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2023
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IF 19
Hui Wang,Xiaodong Chen,Ge Xie,Duohang Bi,Shuo Du,Miaomiao Li,Lianbin Zhang,Jintao Zhu
Photodynamic therapy is promising for combating bacteria by reactive oxygen species. However, the therapeutic efficiency of photodynamic antibacterial therapy (PDAT) is largely hindered by limited photon absorption and the low quantum yield of photosensitizers. Herein, a novel light-harvesting platform is designed by decorating photosensitizer chlorine e6 (Ce6) into an inverse opal photonic hydrogel (Ce6/IOPG) framework for efficient light utilization to enhance PDAT. It is shown that the generating efficiency of singlet oxygen ( 1 O 2 ) can be tuned by the relative positions of the photonic bandgap (PBG) of IOPG and the absorption band of Ce6. The coupling of the slow photon effect with the efficient dispersion of Ce6 allows for a maximum generation of 1 O 2 of approximately 69.5-fold and markedly enhances PDAT activity upon low light irradiation when the blue edge of PBG overlaps with the absorption band of Ce6. Particularly, slow photons at the blue edge show advantages in improving 1 O 2 generation compared to those at the red edge. The variation in 1 O 2 generation by altering the incident angle of light provides direct evidence for the slow photon effect in Ce6/IOPG. This work provides insights into blue-edge slow photons in photodynamic enhancement and offers an advisable design principle for efficient antibacterial therapy.
研究领域:
材料科学
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生物医学工程
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光子学
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治疗学
✓ 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）