Optical Materials最新文献_第5页

Preparation of photonic crystal microspheres with highly saturated structural color through W/O/W multiple emulsion as the soft template 以W/O/W复合乳剂为软模板制备结构色高饱和光子晶体微球

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-02-16 DOI: 10.1016/j.optmat.2026.117979

Xiaoyu Bai, Qiang Zhao, Tongtong Cao, Ming Li, Yuhua Cao

The cured photonic crystal microspheres was prepared through a soft template of water-in-oil-in-water (W/O/W) multiple emulsion, where poly(styrene/methacrylic acid)@polydopamine (P(St/MAA)@PDA) nanoparticles dispersed in water to build liquid colloidal crystals (LCCs) as the inner water phase. P(St/MAA)@PDA nanoparticles were prepared by in situ polymerization of dopamine (DA) on the surface of P(St/MAA) nanoparticles. P(St/MAA)@PDA LCCs with highly saturated colors were obtained owing to PDA absorbing incoherent scattered light. As the mass ratio of PDA to P(St/MAA) nanoparticles increased from 0.1 to 0.5, the arrangement of P(St/MAA)@PDA nanoparticles changed from long-range ordering to short-range ordering, and the angular dependence of the LCCs color gradually disappeared. As the mass fraction of P(St/MAA)@PDA nanoparticles ranged from 20% to 40%, the LCCs had angular dependent and bright color. The content of W/O emulsifier influenced the color phase and brightness of the cured microspheres. The cured microspheres with different sizes were obtained through adjusting the second emulsifying time to form W/O/W emulsion. Finally, the cured microspheres with blue, green and red colors were prepared by controlling the particle size of P(St/MAA) nanoparticles. P(St/MAA)@PDA microspheres with highly saturated structural colors can be directly applied as photonic crystal pigments in coatings and cosmetics without secondary assembly.

采用水包油包水（W/O/W）复合乳液软模板制备固化光子晶体微球，其中聚苯乙烯/甲基丙烯酸@聚多巴胺（P(St/MAA)@PDA）纳米颗粒分散于水中，形成液态胶体晶体（lcc）作为内水相。通过在P（St/MAA）纳米颗粒表面原位聚合多巴胺（DA）制备了P(St/MAA)@PDA纳米颗粒。由于PDA吸收了非相干散射光，得到了颜色高度饱和的P(St/MAA)@PDA lcc。随着PDA与P（St/MAA）纳米粒子的质量比从0.1增加到0.5，P(St/MAA)@PDA纳米粒子的排列由远程有序变为近程有序，lcc颜色的角依赖性逐渐消失。当P(St/MAA)@PDA纳米颗粒的质量分数在20% ~ 40%之间时，lcc具有角度依赖性和明亮的颜色。W/O乳化剂的含量影响固化微球的色相和亮度。通过调整二次乳化时间，得到不同粒径的固化微球，形成W/O/W乳液。最后，通过控制P（St/MAA）纳米颗粒的粒径，制备出蓝色、绿色和红色的固化微球。具有高度饱和结构色的P(St/MAA)@PDA微球可直接作为光子晶体颜料应用于涂料和化妆品中，无需二次组装。

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引用次数: 0

Optical absorption and nonstoichiometry of YAG crystals grown by the HDC method in reducing atmosphere 还原气氛中HDC法生长YAG晶体的光学吸收和非化学计量学研究

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-02-16 DOI: 10.1016/j.optmat.2026.117973

N.S. Sidelnikova, Yu V. Siryk, S.V. Nizhankovskyi

The features of the optical and spectral characteristics (190-1100 nm), and the mechanism of the formation of nonstoichiometry of yttrium-aluminum garnet (YAG) crystals during growth by the horizontal directional crystallization method in a reducing atmosphere containing CO, H₂ and annealing in environments with different redox potentials were investigated. It has been established that the two-tone coloration of the crystals with the formation of broad absorption bands (380-500 nm, 550-750 nm) is determined by the intrinsic centers arising as a result of nonstoichiometric evaporation of YAG, and include antistructural defects (Y_Al), cationic and anionic vacancies, as well as the associated F⁺–Y_Al, O⁻–Y_Al complexes, which are unevenly distributed in the crystal along the growth direction. The role of polyvalent impurities (Ti, Fe and С in the concentration range ≤0,1 wt%) is mainly to generate intrinsic defects, which ensure the electroneutrality of the lattice and lead to an increase in the intensity of the absorption without the formation of additional impurity bands. It is shown that the addition of excess Al₂O₃ (≤2 wt%) to the mixture leads to a noticeable decrease in the color and absorption intensity of the crystals in the entire spectral range studied.

研究了钇铝石榴石（YAG）晶体在含CO、H2的还原气氛和不同氧化还原电位环境下的水平定向结晶生长过程中的光学和光谱特征（190 ~ 1100 nm），以及非化学计量学的形成机理。结果表明，YAG的非化学蒸发产生的本征中心决定了晶体的双色，并形成了宽吸收带（380-500 nm, 550-750 nm），包括反结构缺陷（YAl），阳离子和阴离子空位，以及伴随的F+ -YAl， O−-YAl配合物，这些配合物沿生长方向不均匀分布在晶体中。多价杂质（浓度范围≤0.1 wt%的Ti、Fe和С）的作用主要是产生本征缺陷，保证了晶格的电中性，导致吸收强度增加，而不形成额外的杂质带。结果表明，在混合物中加入过量的Al2O3（≤2 wt%）会导致在所研究的整个光谱范围内晶体的颜色和吸收强度明显下降。

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引用次数: 0

GaN surface micro-nanostructures induced by femtosecond vector beams for high-sensitivity SERS applications 飞秒矢量光束诱导GaN表面微纳结构的高灵敏度SERS应用

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-02-16 DOI: 10.1016/j.optmat.2026.117972

Shengbin Zhao, Shutong Wang, Zhenxing Xu, Mengtao Yang, Lufan Qi, Quan Chen, Hao Zhou, Guoliang Deng

Fabricating rich surface micro/nanostructures on gallium nitride (GaN)-based surface-enhanced Raman scattering (SERS) substrates represents a critical approach to boosting their detection performance. In this study, we propose a method of fabricating hierarchical micro-nanostructures on GaN surfaces using femtosecond vector light fields, while systematically assessing its potential applications in SERS. By modulating the polarization state of vector beams, diverse microstructures were induced on the GaN thin film surfaces. Additionally, by varying the overlap ratio of adjacent laser spots, we successfully fabricated three types of periodic surface structures, namely micropillar arrays, hybrid arrays, and micropit arrays. Experimental results reveal that depositing a 50 nm-thick silver film on these structures leads to the formation of abundant electromagnetic field hotspots, thereby significantly enhancing SERS performance. Among these structures, the hybrid structure prepared with a 15% spot overlap rate exhibits the optimal SERS enhancement effect, attributed to its richer nanoscale features. This structure achieves a detection limit of 10⁻¹¹ M for methylene blue (MB) solution, and an enhancement factor (EF) of 1.43 × 10⁹. Furthermore, the Ag/GaN SERS substrate demonstrated excellent signal uniformity and temporal stability. This work provides a new insight into the functionalizing GaN surfaces and holds substantial potential applications in biochemical sensing and optoelectronic devices.

在氮化镓（GaN）基表面增强拉曼散射（SERS）衬底上制备丰富的表面微/纳米结构是提高其检测性能的关键方法。在这项研究中，我们提出了一种利用飞秒矢量光场在GaN表面上制造分层微纳米结构的方法，同时系统地评估了其在SERS中的潜在应用。通过调制矢量光束的偏振态，在GaN薄膜表面诱导出不同的微结构。此外，通过改变相邻激光光斑的重叠比，我们成功地制备了三种类型的周期性表面结构，即微柱阵列、混合阵列和微坑阵列。实验结果表明，在这些结构上沉积50 nm厚的银膜，可以形成丰富的电磁场热点，从而显著提高SERS性能。其中，斑点重叠率为15%的杂化结构由于具有更丰富的纳米尺度特征，具有最佳的SERS增强效果。该结构对亚甲基蓝溶液的检出限为10−11 M，增强因子（EF）为1.43 × 109。此外，Ag/GaN SERS衬底表现出良好的信号均匀性和时间稳定性。这项工作为功能化GaN表面提供了新的见解，并在生化传感和光电子器件中具有巨大的潜在应用。

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引用次数: 0

Rare-earth doping of AgGaGe3Se8: A pathway to multifunctional materials for tunable optoelectronics 稀土掺杂AgGaGe3Se8：可调谐光电子多功能材料的途径

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-02-13 DOI: 10.1016/j.optmat.2026.117966

G. Myronchuk , M. Kyrychenko , P. Rakus , J. Jedryka , S. Taboukhat , D. Guichaoua , B. Sahraoui

This study explores the impact of rare-earth ion doping (Nd³⁺, Er³⁺) on the complex optical, photoelectric, and functional properties of advanced AgGaGe₃Se₈ chalcogenide crystals. The findings demonstrate that Er³⁺ doping, in particular, serves as an efficient strategy for band structure engineering, resulting in a reduced band gap (Eg down to 2.20 eV) and a marked increase in static structural disorder (Urbach energy Eu up to 81 meV), while preserving high transparency in the mid infrared region.

These microscale modifications manifest in a pronounced enhancement of the impurity photoconductivity peak (∼1.65 eV), supporting the formation mechanism of defect centers, notably silver vacancies. Crucially, the altered electronic structure drives a synergistic improvement in the material's functional performance: the piezoelectric coefficient d₃₃ rises to 35 p.m./V, and second harmonic generation (SHG) efficiency is significantly boosted. Moreover, the study demonstrates the feasibility of optically modulating the piezoelectric response.

Overall, the results confirm that targeted rare-earth doping is a powerful approach for developing novel multifunctional materials for infrared optoelectronics, offering tunable piezoelectric behavior and enhanced nonlinear optical properties.

本研究探讨了稀土离子掺杂（Nd3+, Er3+）对先进AgGaGe3Se8硫系化合物晶体复杂光学、光电和功能性质的影响。研究结果表明，Er3+掺杂是一种有效的能带结构工程策略，可以减小带隙（Eg降至2.20 eV）和显著增加静态结构无序（Urbach能Eu高达81 meV），同时在中红外区域保持高透明度。这些微尺度的修饰表现在杂质光电导率峰（~ 1.65 eV）的显著增强，支持缺陷中心的形成机制，特别是银空位。至关重要的是，改变的电子结构推动了材料功能性能的协同改善：压电系数d33上升到35 p.m./V，二次谐波产生（SHG）效率显着提高。此外，研究还证明了光调制压电响应的可行性。总体而言，研究结果证实，定向稀土掺杂是开发新型红外光电子多功能材料的有力途径，可以提供可调谐的压电行为和增强的非线性光学特性。

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引用次数: 0

Controlling copper zinc tin sulfide (CZTS) absorber layer properties through pneumatic spray pyrolysis deposition parameters 通过气动喷雾热解沉积参数控制硫化铜锌锡（CZTS）吸收层性能

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-01-23 DOI: 10.1016/j.optmat.2026.117878

Mohammad Arab, Akbar Eshaghi, Ehsan Mohammad Sharifi

CZTS is considered a strong contender for third-generation solar cell technologies due to its composition of Earth abundant, low-cost, and non-toxic elements. However, achieving high quality CZTS thin films through scalable and economically viable synthesis routes remains a considerable challenge. This study addresses that gap by optimizing three key fabrication parameters using a practical and cost effective pneumatic spray pyrolysis technique. The process optimization was guided by the Taguchi method, which systematically evaluated the effects of three variables substrate temperature, annealing temperature, and annealing time each tested at three levels. After deposition, all samples were characterized using X-ray diffraction (XRD), and the data were thoroughly analyzed using specialized software. The analysis identified the optimal synthesis conditions for obtaining a pure CZTS phase, a substrate temperature of 300 °C, an annealing temperature of 510 °C, and an annealing duration of 70 min. To validate these optimal parameters, a CZTS sample was fabricated under the defined conditions and subjected to comprehensive characterization, including XRD, field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), and diffuse reflectance spectroscopy (DRS). The results confirmed that the sample exhibited structural integrity and favorable optical and electrical characteristics suitable for photovoltaic applications. Notably, DRS analysis showed that the optimized CZTS film had strong absorption throughout the visible spectrum and featured a direct band gap of 1.61 eV an ideal value for solar energy conversion. These findings reinforce the potential of this synthesis route for producing high performance CZTS absorber layers on a commercial scale.

CZTS被认为是第三代太阳能电池技术的有力竞争者，因为它的成分是地球上丰富的、低成本的、无毒的元素。然而，通过可扩展和经济可行的合成路线获得高质量的CZTS薄膜仍然是一个相当大的挑战。本研究通过使用实用且经济有效的气动喷雾热解技术优化三个关键制造参数来解决这一差距。工艺优化以田口法为指导，系统评估了衬底温度、退火温度和退火时间三个变量在三个水平上的影响。沉积后，用x射线衍射（XRD）对所有样品进行表征，并使用专用软件对数据进行全面分析。分析确定了获得纯CZTS相的最佳合成条件，衬底温度为300 ℃，退火温度为510 ℃，退火时间为70 min。为了验证这些最佳参数，在规定的条件下制备了CZTS样品，并对其进行了全面的表征，包括XRD，场发射扫描电子显微镜（FESEM），能量色散x射线光谱（EDS），拉曼光谱（FTIR），傅里叶变换红外光谱（FTIR），原子力显微镜（AFM）和漫反射光谱（DRS）。结果证实，样品具有结构完整性和良好的光学和电学特性，适合光伏应用。值得注意的是，DRS分析表明，优化后的CZTS薄膜在整个可见光谱具有较强的吸收，其直接带隙为1.61 eV，是太阳能转换的理想值。这些发现加强了这种合成路线在商业规模上生产高性能CZTS吸收层的潜力。

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引用次数: 0

Predicting fs-laser-induced NV centers with PCA and neural networks 用PCA和神经网络预测fs激光诱导的NV中心

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-01-23 DOI: 10.1016/j.optmat.2026.117917

Murilo Neco Saraiva, Orlando Marbello Ospina, Lucas Konaka Nolasco, Renan Souza Cunha, Lucas Nunes Sales de Andrade, Sergio Ricardo Muniz, Cleber Renato Mendonca

Diamond hosts a variety of lattice defects, among which nitrogen-vacancy (NV) centers stand out due to their relevance in quantum photonics with optically addressable qubits. Yet, the complex laser–material interactions governing its formation are not fully understood, and the influence of laser parameters on NV generation still raises open questions. Here, we investigate the generation of NV centers using principal component analysis (PCA) and artificial neural networks (ANNs) as predictive tools based on femtosecond laser parameters. Experimental results from femtosecond laser micromachining of diamond provided the dataset for our analysis. We employed PCA to reduce data dimensionality and uncover dominant experimental trends, while a multilayer perceptron model was trained to predict NV center generation under simulated conditions. GridSearch optimization and Leave-One-Out cross-validation (LOOCV) ensured the best performance and robustness of the ANN. Our results reveal that NV center generation is directly proportional to laser peak fluence and inversely proportional to pulse duration and excitation wavelength. Notably, PCA and ANN modeling independently converged on consistent trends, reinforcing the reliability of the observed parameter–defect relationships. This convergence supports the development of predictive frameworks for controlled color center generation in diamond with greater precision.

金刚石具有多种晶格缺陷，其中氮空位（NV）中心因其在量子光子学中与光学可寻址量子比特的相关性而脱颖而出。然而，控制其形成的复杂的激光-材料相互作用尚未完全理解，激光参数对NV产生的影响仍然存在悬而未决的问题。在这里，我们使用主成分分析（PCA）和人工神经网络（ann）作为基于飞秒激光参数的预测工具来研究NV中心的生成。飞秒激光微加工金刚石的实验结果为我们的分析提供了数据集。我们使用PCA来降低数据维数并揭示主要的实验趋势，同时训练多层感知器模型来预测模拟条件下NV中心的生成。网格搜索优化和留一交叉验证（LOOCV）保证了神经网络的最佳性能和鲁棒性。我们的研究结果表明，NV中心的产生与激光峰值丰度成正比，与脉冲持续时间和激发波长成反比。值得注意的是，PCA和ANN模型独立收敛于一致的趋势，增强了观测到的参数-缺陷关系的可靠性。这种收敛性支持预测框架的发展，以更高的精度控制钻石的色心生成。

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引用次数: 0

BiVO4-g-C3N4 nanocomposites as multifunctional materials for photocatalytic dye degradation and nonlinear optical applications BiVO4-g-C3N4纳米复合材料作为光催化降解染料和非线性光学的多功能材料

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-02-17 DOI: 10.1016/j.optmat.2026.117980

Kannan Nagarajan , Saidurga Rajkumar , Sundara Venkatesh Perumalsamy , Sabari Girisun T. Chidambaram , Jeganathan Kulandaivel , Thangadurai Paramasivam

BiVO₄/g-C₃N₄ nanocomposites (NCs) were synthesised through a simple chemical method, and their photocatalytic and nonlinear optical (NLO) properties were investigated. XRD confirms the phase composition and crystallinity, while the XPS study reveals strong interfacial electronic interactions, indicating the Z-scheme formation. The BG-1:3 (0.25g of BiVO₄ and 0.75g of g-C₃N₄) nanocomposite (NC) exhibited a reduced bandgap of 2.65 eV, leading to improved charge separation and visible light absorption. This composite degrades 94% of Methylene Blue (MB) dye under sunlight illumination within 90 min and has excellent photostability over four consecutive cycles. Scavenger studies identified holes (h⁺) played the predominant role in the degradation process, followed by hydroxyl (

\cdot O H

^-) and superoxide (O₂⁻) radicals. Furthermore, open-aperture Z-scan analysis demonstrated that the BG-1:3 NC exhibited reverse saturable absorption (RSA), primarily governed by sequential two-photon absorption (2PA), with a high 2PA coefficient (β) of 1.24 × 10⁻¹⁰ m/W and a low optical limiting threshold of 1.72 × 10¹² W/m².

采用简单的化学方法合成了BiVO4/g-C3N4纳米复合材料（NCs），并对其光催化和非线性光学（NLO）性能进行了研究。XRD证实了相组成和结晶度，而XPS研究显示强的界面电子相互作用，表明Z-scheme的形成。BG-1:3 （0.25g BiVO4和0.75g g-C3N4）纳米复合材料（NC）的带隙减小到2.65 eV，从而改善了电荷分离和可见光吸收。该复合材料在90 min的光照下降解94%的亚甲基蓝（MB）染料，并且在连续四个循环中具有优异的光稳定性。清道夫研究发现，空穴（h+）在降解过程中起主导作用，其次是羟基（·OH -）和超氧化物（O2−）自由基。此外，开孔z扫描分析表明，BG-1:3 NC具有反向饱和吸收（RSA），主要由顺序双光子吸收（2PA）控制，其2PA系数（β）高为1.24 × 10−10 m/W，光限阈值低为1.72 × 1012 W/m2。

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引用次数: 0

Radiochromic responses of Gafchromic EBT3 film under neutron exposure 中子辐照下钆致变色EBT3薄膜的放射变色响应

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-02-12 DOI: 10.1016/j.optmat.2026.117957

Omar M. Kotb , Elsayed K. Elmaghraby , M. El Ghazaly , Amal Mohamed

The response of Gafchromic^TM EBT3 films to moderated and fast neutron fields was systematically investigated to assess their potential for neutron detection. The reliability of the EBT3 films in high-resolution neutron dosimeters makes them suitable for applications in neutron-based radiotherapy, where accurate neutron fluence mapping is critical for treatment planning and verification. The film responses were quantified by flatbed scanning using color channel analysis and UV–Vis absorption spectroscopy for the determination of optical properties such as band gaps and Urbach energy. Both moderated and fast neutrons induced a measurable change in optical density, demonstrating the intrinsic neutron sensitivity of the film through internal conversion mechanisms (proton recoils and

^{6} Li (n,^{3} H) α

reaction). Flatbed scanning analysis demonstrated a useful dynamic range in the Red, Green, and weighted Gray channels that was highly correlated with neutron fluence. The moderated neutron setup exhibited a significantly higher response and faster transition to saturation compared to the fast neutron setup. This elevated sensitivity is attributed to the coincident dose contribution from associated prompt and delayed gamma radiation inherent in the moderated field, highlighting a challenge for neutron-only dosimetry. Results showed that Urbach energy is a highly sensitive parameter, superior to that from standard optical density and band gap measurements, for characterizing the structural effects of neutron irradiation, offering an adjunct technique to complement traditional fluence estimation.

系统地研究了GafchromicTM EBT3薄膜对慢中子场和快中子场的响应，以评估其中子探测潜力。高分辨率中子剂量计中EBT3薄膜的可靠性使其适用于基于中子的放射治疗，其中精确的中子通量测绘对于治疗计划和验证至关重要。利用彩色通道分析和紫外-可见吸收光谱对薄膜响应进行了定量分析，以确定带隙和乌尔巴赫能等光学性质。慢中子和快中子都引起了可测量的光密度变化，证明了薄膜通过内部转换机制（质子反冲和6Li(n,3H)α反应）具有固有的中子灵敏度。平板扫描分析表明，红色、绿色和加权灰色通道的动态范围与中子通量高度相关。与快中子装置相比，慢化中子装置表现出更高的响应和更快的饱和跃迁。这种敏感性的提高是由于在慢化场中固有的相关的提示和延迟伽马辐射的同步剂量贡献，这突出了仅中子剂量学的挑战。结果表明，Urbach能量是一个高度敏感的参数，优于标准光密度和带隙测量，用于表征中子辐照的结构效应，为传统的通量估计提供了一种辅助技术。

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引用次数: 0

Unveiling the role of Gd3+ and Mg2+ co-doping on morphology and upconversion luminescence in NaYbF4: Er3+ particles 揭示了Gd3+和Mg2+共掺杂对NaYbF4: Er3+粒子形态和上转换发光的影响

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-01-29 DOI: 10.1016/j.optmat.2026.117931

Tamilmani Vairapperumal , Lakshmi Mukhopadhyay , Vineet Kumar Rai

Morphology as well as doping significantly affects the luminescence properties of lanthanide-based upconverting materials. Therefore, this work undertakes a systematic investigation of Gd³⁺ (lanthanide) and/or Mg²⁺ (non-lanthanide) co-doping in cubic phase NaYbF₄: 5 mol% Er³⁺ particles. Demonstrates the transformation of spherical to cauliflower-shaped particles on Mg²⁺ ion co-doping due to the cooperative effect of differential adsorption and surface charge modification. Our findings extract a clear understanding of upconversion luminescence with dopants (Gd³⁺/Mg²⁺) and morphology of NaYbF₄: Er³⁺, to a variety of applications extending as luminescent markers and optical thermometry.

形貌和掺杂对镧系上转换材料的发光性能有显著影响。因此，本研究对立方相NaYbF4: 5 mol% Er3+粒子中Gd3+（镧系元素）和/或Mg2+（非镧系元素）共掺杂进行了系统的研究。证明了在Mg2+离子共掺杂下，由于微分吸附和表面电荷修饰的协同作用，球形粒子向花椰菜状粒子的转变。我们的研究结果清楚地了解了掺杂剂（Gd3+/Mg2+）和NaYbF4: Er3+的上转换发光，以及作为发光标记和光学测温的各种应用。

引用次数: 0

Wavelength dependent photocatalytic decolorization of dyes using zinc oxide nanorod catalyst 波长依赖性氧化锌纳米棒催化剂对染料的光催化脱色

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-06-01 Epub Date: 2026-02-02 DOI: 10.1016/j.optmat.2026.117938

Myo Tay Zar Myint , Salim Al-Harthi , Zahra Al-Sharji , Tamadher Al-Salmani , Mohammed Al-Abri , Htet Htet Kyaw

Various wavelengths generate different energies and can serve as excitation sources for the photocatalysis process. In this research, a step-by-step process was employed to fabricate zinc oxide (ZnO) nanorods by wet chemical synthesis method on a glass surface. Different colors of light-emitting diodes (LEDs) excited the ZnO photocatalyst and degraded two dyes, namely methylene blue (MB) and Congo red (CR). The highest degradation efficiency of 95% for CR dye, as well as the fastest reaction kinetics (0.0089 min⁻¹), was achieved under blue LED irradiation. For MB dye, the red LED yielded the highest degradation (72%), and the fastest degradation kinetics (0.0024 min⁻¹) was observed under white LED irradiation. Energy matching between defect states of ZnO nanorods and the blue LED emission, together with the spectral overlap between the dye and the excitation source, enhances reactive oxygen species generation. This improves dyes degradation. Time-dependent photon efficiency estimation results showed the maximum efficiency of 11.8% at the 3rd hour of the photocatalytic process for MB dye under red LED excitation. This finding contributes to the understanding of the excitation wavelength-dependent photodegradation phenomenon in color dyes, aiming to maximize the energy efficient degradation process.

不同的波长产生不同的能量，可以作为光催化过程的激发源。在本研究中，采用湿法化学合成方法在玻璃表面逐步制备氧化锌纳米棒。不同颜色的发光二极管（led）激发ZnO光催化剂，降解亚甲基蓝（MB）和刚果红（CR）两种染料。在蓝色LED照射下，CR染料的降解效率最高，达到95%，反应动力学最快（0.0089 min−1）。对于MB染料，在白色LED照射下，红色LED的降解率最高（72%），降解动力学最快（0.0024 min−1）。ZnO纳米棒缺陷态与蓝色LED发光的能量匹配，以及染料与激发源的光谱重叠，增强了活性氧的生成。这改善了染料的降解。随时间变化的光子效率估计结果表明，在红色LED激发下，MB染料在光催化过程的第3小时效率最高，达到11.8%。这一发现有助于理解彩色染料中激发波长依赖的光降解现象，旨在最大限度地提高能效降解过程。

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