CARBON
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2021
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IF 9.594
Xufeng Jing,Yayan Xu,Haiyong Gan,Ping Hu,Chenxia Li,Jianqiang Qian,Junjie Zhang,Ying Tian,Shiqing Xu
Fluorescence of negatively charged nitrogen-vacancy color centers in nanodiamond is applied in nanoscale sensing. Here, we generated a stable transparent composite ND-SiO 2 film by introducing well-dispersed nanodiamonds into silica sol with sol-gel method and spin coating . The transmission electron microscope, X-ray diffraction and Raman curves all can demonstrate homogeneous dispersion of nanodiamond particles in the silicon dioxide film. The hybrid coating displayed significant temperature dependence by studying the fluorescence behavior from liquid nitrogen temperature to room temperature. With rising temperature, the red shift in zero phonon line position, reduction in intensity, extension in the full width at half maximum and decrease in amplitude were obviously typical characteristics. In addition, the sensitivity was 19 K Hz −1/2 at 80K, while it increased to 28 K Hz −1/2 at 300K.
研究领域:
材料科学
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光学
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DOI
高影响因子
CRYSTAL GROWTH & DESIGN
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2025
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IF 3.4
Yunxia Han,Chao Gu,Jian Chen,Guozhu Song,Yusheng Zhao,Mingyu Gong,Shanmin Wang
Incorporation of defects into covalent solids (e.g., diamond) can greatly alter their electronic and structural properties for creating optically active color centers, which also leads to largely adjusted mechanical properties. As an electronic equivalent to diamond, cubic boron nitride (cBN) with superhardness is often formed with crystalline imperfections. However, the defect dependences of color centers and mechanical properties in cBN have been rarely explored due to the difficulties in synthesizing defective crystals with controllable defects, which have largely limited its functionality. In this work, we present a systematic study of various defective cBN crystals prepared from different catalyst systems under high pressure with a focus on the optical and mechanical properties. A number of distinct color centers have been identified for emitting luminescence across a broad spectrum of lights, ranging from infrared to ultraviolet. Because of the defects, the hardness of cBN crystals can also be largely tuned in a wide range of 43–63 GPa. These findings offer important foundations for rationally tailoring the optical and mechanical properties of diamond-like covalent solids by defect chemistry.
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产品关联
DOI
高影响因子
Photonics
·
2025
·Vol. 12
·期 12
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IF 1.9
Yangyang Guo,Fuwen Shi,Bo Li
The NV center in diamonds has been widely employed in quantum sensing, quantum computing, and bioimaging due to its controllable ground-state spin, detectable magnetic resonance, excellent photostability, favorable biocompatibility, and chemical inertness. However, conventional excitation using 532 nm green light still exhibits certain limitations in practical applications. To address this, we propose a novel NV center excitation method based on the upconversion of near-infrared light to green emission. Through the synthesis of molybdenum-doped NaYF4: 20% Yb3+, 1.5% Er3+upconversion materials, efficient excitation of NV centers has been achieved. Both UC-LED luminescence spectroscopy and ODMR measurements confirm that the green light generated via the upconversion process exhibits sufficient intensity to effectively excite NV centers. Meanwhile, the characteristic sharp emission peaks of rare-earth upconversion materials eliminate the need for optical filters, facilitating device miniaturization, and a miniaturized UC-LED sensor has been developed.
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
·
IF 19
Jiao Cui,Jiawei Yan,Yingqiu Xu,Canlin Zhou,Jiawen Fan,Hengxi Yao,Tong Wei,Linyang Li,Jia Li,Yingdong Han,Liwei Wu,Qiwei Zhang
In the information era, secure storage and high-throughput manipulation of massive image datasets face critical challenges. Inorganic photochromic (PC) media—promising candidates for optical storage—remain constrained by limited elemental diversity and stoichiometric flexibility, hindering performance breakthroughs. Conventional storage paradigms involving direct transcription of raw images onto PC layers are prone to security vulnerabilities. Herein, we fabricate a high-entropy perovskite (HEP) ceramic achieving 58.1% PC contrast with sub-second write/erase speeds. This superior performance is attributed to the tailored defect landscape dominated by oxygen vacancies, which facilitates efficient color-center formation. Through precise Er 3 ⁺ site-selective substitution, we reveal that B-site occupancy synergistically optimizes dual-mode PC and photoluminescence (PL)/upconversion luminescence (UCL). Leveraging this bifunctionality, we develop an image-matrix encryption protocol that converts visual information into error-correctable binary data matrices. The matrix-based encryption architecture provides a security-enhanced framework compatible with modern computing systems.
研究领域:
材料科学
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光学与光子学
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数据存储技术
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信息安全
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陶瓷工程
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DOI
高影响因子
INORGANIC CHEMISTRY
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2021
·
IF 5.165
Xiao Zhou,Jinjin Yang,Chuanhui Zhu,Yifeng Han,Zhongxiong Sun,Xiaokang Huang,Luyu Cao,Jing Wang,Yuanyuan Fang,Kai Wang,Bo Zou,Man-Rong Li
The rational design of multifunctional inorganic pigments relies on the manipulation of ionic valence and local surroundings of a chromophore in structurally and chemically habitable hosts. To date, the development of environmentally benign and intense violet/purple pigments is still a challenge. Here we report a family of A3–xMnxTeO6 and A3–2xMnxLixTeO6 (A = Zn, Mg; x = 0.01–0.15) pigments colored by site-selective Mn2+O4 yellow and Mn3+O5–6 violet chromophores. Zn2.9Mn0.1TeO6 is intense bright yellow, comparable with commercial BiVO4, and has better near-infrared reflectivity (∼89%) in comparison to commercial TiO2. The codoped Li+ “activator” generates holes and charge-balanced Mn3+ (Mn3+O5–6), realizing a color transformation from yellow to the bright violet pigments of A3–2xMnxLixTeO6. The most vivid Mg2.8Mn0.1Li0.1TeO6 is probably the best violet pigment known to date, exhibits excellent chemical and thermodynamic stability, and demonstrates pressure-dependent stability up to 5–7 GPa, before a (reversible) phase transition to pink. Theoretical calculations revealed the correlation between site-preference occupancy and chromophore motifs and predicted a wide color gamut of pigments in Zn3TeO6-hosted 3d transition-metal ions other than manganese.
研究领域:
材料科学
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无机化学
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颜料技术
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理论化学
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DOI
高影响因子
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