Article Chemistry, Multidisciplinary
Broadband Antireflective Hybrid Micro/Nanostructure on Zinc Sulfide Fabricated by Optimal Bessel Femtosecond Laser
Xun Li, Ming Li
Summary: A new hybrid micro/nanostructure was created on a ZnS substrate using an optimal Bessel femtosecond laser, improving the infrared window transmittance. The formation of nanoripples on micropores was explained as a result of SPP interference and scattering in a specific direction. The maximum average transmittance of the hybrid structure increased by 9.7% and 12.3% in the wavelength ranges of 5 to 12 µm and 8 to 12 µm, respectively. Additionally, the antireflective mechanism was explored using an electromagnetic field model based on the FDTD method, attributing the stable antireflective performance to the interface effective dielectric effect and LLFE.
NANOMATERIALS (2023)
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Article Materials Science, Multidisciplinary
Multi-scale structural characteristics and the damage evolution mechanism of rock under load
Yuying Ren, Yida Sun, Xiangxi Meng
Summary: The changes in rock multi-scale structure after different damage are studied in this experiment, with emphasis on the severe damage under high compression ratio. The research establishes a damage evolution equation based on NMR characteristics, which clearly characterizes the damage rule of multi-scale structures in the process of rock loading.
MATERIALS LETTERS (2023)
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Article Chemistry, Multidisciplinary
Passive Deicing CFRP Surfaces Enabled by Super-Hydrophobic Multi-Scale Micro-Nano Structures Fabricated via Femtosecond Laser Direct Writing
Zihan Zhang, Jiakang Zhou, Yuqi Ren, Weihan Li, Sheng Li, Nianyao Chai, Zhongle Zeng, Xiangyu Chen, Yunfan Yue, Ling Zhou, Yibing Cheng, Shuxin Li, Xuewen Wang
Summary: In this study, a superhydrophobic surface with micro-nano structures was created on CFRP using femtosecond laser processing. The transition from hydrophilic to superhydrophobic CFRP was achieved. The optimized superhydrophobic CFRP showed excellent anti-icing properties without deteriorating its mechanical strength. This research is of great significance for aircraft passive deicing technology.
NANOMATERIALS (2022)
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Article Mathematics, Interdisciplinary Applications
The multi-scale structural complexity of urban morphology in China
Ping Wang, Changgui Gu, Huijie Yang, Haiying Wang
Summary: This article measures the complexity of urban morphology using the multi-scale structural complexity method and finds correlations between this complexity and the vitality of urban socio-economic development as well as typical statistical indicators. The construction of a mutual information network among cities reveals strong correlations between typical cities and also between different years in terms of socio-economic forms.
CHAOS SOLITONS & FRACTALS (2022)
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Article Materials Science, Multidisciplinary
Effect of composite structure on titanium alloy for infrared antireflection performance
Xuewu Li, Hongxing Wang, Zhiguo Xing, Yanfei Huang, Weiling Guo, Haidou Wang, Yanfang Zhang, Longlong Zhou
Summary: This study prepared a novel composite antireflective structure with slotted holes using FDTD simulation combined with femtosecond laser design to further improve the infrared anti-reflective performance. The results show that the antireflection performance of the simulated groove-hole composite structure is better than that of the individual groove and hole structures, and the nanoparticle structures can further improve the antireflection performance in the infrared region.
MATERIALS TODAY COMMUNICATIONS (2024)
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Article Chemistry, Analytical
Fabrication of Antireflection Micro/Nanostructures on the Surface of Aluminum Alloy by Femtosecond Laser
Mengdan Du, Quanquan Sun, Wei Jiao, Lifeng Shen, Xiao Chen, Junfeng Xiao, Jianfeng Xu
Summary: By designing micro-nano structures on the surface of aluminum alloy and employing a two-step strategy, broadband antireflection structures with excellent light trapping properties were fabricated, suitable for applications in thermal photovoltaics and other fields.
MICROMACHINES (2021)
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Article Engineering, Mechanical
Multi-scale collaborative optimization of lattice structures using laser additive manufacturing
Xi Wang, Ruixian Qin, Bingzhi Chen, Xu Niu, Junxian Zhou
Summary: In this study, an approach was proposed to design a three-dimensional multiscale graded lattice structure using control parameters. A parameterized interpolation model was established to balance computational accuracy and cost. The results showed that the graded lattice structures designed using this approach had significantly improved load-bearing performance.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES (2022)
Article Engineering, Chemical
Multi-scale simulation of turbulence and heat transfer characteristics in randomly packed beds
Jiang Linsong, Wang Ping, Ferrante Antonio
Summary: The study utilized pore-scale numerical simulation to validate the structure model and heat transfer model. It found periodic distributions of various flow scalars and heat transfer scalars in packed structures, and described the influence of inlet velocities and other parameters on turbulence and temperature fields in porous media. The use of large eddy simulation method provided insights into the flow and temperature fields under pore-scale, along with distribution characteristics of eddies in porous structures and changes in isothermal surface shape with heating.
POWDER TECHNOLOGY (2021)
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Article Materials Science, Multidisciplinary
Correlating multi-scale structure characteristics to mechanical behavior of Caprinae horn sheaths
Kang Yang, Nannan Qin, Changgeng Zhou, Hailiang Deng, Wenhan Tian, Siyu Cai, Zihong Wu, Juan Guan
Summary: This study investigated the effect of multi-scale structure characteristics on the mechanical behavior of horn sheath in different goats. The conformation of keratin and strength of fibers were found to significantly influence the tensile/flexural performance of the horn sheath under both dried and hydrated conditions. The corrugated lamellae structure was identified to promote crack deflection and enhance the performance of dried samples, making them more advantageous for flexural loading applications. The synergism of multi-scale mechanisms was found to be crucial to the mechanical properties of the Caprinae horn sheath.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T (2022)
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Article Thermodynamics
Periodic large-scale structural characteristics of two-phase flow in tight lattice bundles
Xu Yan, Yao Xiao, Hengwei Zhang, Hanyang Gu
Summary: This paper investigated the two-phase flow characteristics in a double sub-channel tight lattice (P/D = 1.06). The study utilized a self-developed wire-mesh sensor to measure the phase distribution at two positions of the test channel. The results revealed different coherent structures under bubbly flow and cap-bubbly flow conditions.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2023)
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Article Energy & Fuels
Multi-Objective Optimization via GA Based on Micro Laser Line Scanning Data for Micro-Scale Surface Modeling
J. Apolinar Munoz Rodriguez
Summary: Industry 4.0 represents advanced methodologies for intelligent, autonomous, and self-adaptable manufacturing systems. Surface modeling technology is a valuable tool in Industry 4.0 for representing surface point clouds. This study focused on using artificial intelligence and genetic algorithms for surface modeling at the micro-scale. The results showed that the proposed technique enhanced the fitting of micro-scale flat and free-form surface models.
ENERGIES (2022)
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Article Polymer Science
A multi-technique and multi-scale analysis of the thermal degradation of PEEK in laser heating
Dimitrios Gaitanelis, Angeliki Chanteli, Chris Worrall, Paul M. Weaver, Mihalis Kazilas
Summary: The present work investigates the thermal degradation of laser-heated PEEK and its effects on morphology, composition, crystallinity, and mechanical properties. Various methods including microscopy, spectroscopy, and nanoindentation are employed to examine the thermal damage. The results demonstrate that short-time laser heating can improve the crystallinity and hardness of PEEK, while prolonged heating leads to surface carbonisation and the formation of a char layer. The char layer acts as a protective mechanism, resulting in mainly superficial thermally induced damage.
POLYMER DEGRADATION AND STABILITY (2023)
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Article Thermodynamics
Identification of multi-scale hom*ogeneity of blended cement concrete: macro performance, micro and meso structure
Long Yu, Qi Wang, Kai Wu, Zhijun Tan, Feng Pan, Zhenghong Yang, Geert De Schutter
Summary: This study systematically investigates the effect of limestone powder and slag on the hom*ogeneity of concrete using multi-scale methods. The results show that the addition of limestone powder and slag promotes cement hydration, hom*ogenizes mineralogical compositions, and improves the pore structure of concrete.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY (2022)
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Article Materials Science, Multidisciplinary
Ultrafast laser reconstructed PS-PVD thermal barrier coatings with superior silicophobic triple-scale micro/nano structure
Yiqian Guo, Lei Guo, Xinxin Li, Chengyang Jiang, Liangliang Wei, Xingya Zhu, Dongrui Liu, Wenjia Song, Donald B. Dingwell, Hongbo Guo
Summary: In this study, a lotus leaf-like surface morphology of dual-scale structured (Gd0.9Yb0.1)2Zr2O7 thermal barrier coatings (TBCs) was fabricated using novel PS-PVD technology to resist the wetting and spreadability of molten silicate. By using ultrafast laser direct writing technology, the surface of the PS-PVD TBC was reconstructed to obtain a triple-scale structure, which exhibited excellent silicate phobicity at high temperatures. This study suggests that the combination of PS-PVD technology and ultrafast laser direct writing has great potential for the fabrication of molten silicophobic TBCs for turbine engines.
MATERIALS & DESIGN (2023)
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Article Chemistry, Applied
Nanofiber fluorescence coating for evaluation of complex solid-/ gas-multi-phase and nano-/micro- multi-scale nanocomposite foam structure
Haoyu Ma, Pengjian Gong, Yunjiao Qiao, Yajiang Huang, Chul B. Park, Hong Jiang, Guangxian Li
Summary: The study successfully applied a dual fluorescence design in nanocomposite foams, revealing complex multi-phase and multi-scale structures, enriching our understanding of internal material structures. The research found that increasing cell wall thickness and decreasing air content lead to a decrease in the average shortest distance between nanofibers, providing guidance for studying the structure-performance relationship of multifunctional materials.
PROGRESS IN ORGANIC COATINGS (2021)
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Article Materials Science, Multidisciplinary
Fabrication and luminescence properties of Al2O3-Ce:LuAG composite phosphor ceramics for solid-state laser lighting
Yanbin Wang, Xinyou Huang, Ziqiu Cheng, Penghui Chen, Yuyang Chen, Junhao Ye, Haohong Chen, Zhenzhen Zhou, Denis Yu Kosyanov, Jiang Li
Summary: Uniform Al2O3-Ce:LuAG composite phosphor ceramics (CPCs) with excellent luminescent properties and thermal stability have been successfully synthesized in this study, showing great potential for application in solid-state laser lighting.
OPTICAL MATERIALS (2024)
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Article Materials Science, Multidisciplinary
Effect of laser irradiance on opto-electrical properties of PVA embedded graphene copper ferrite nanocomposite strips
Syed Muhammad Ali Zaidi, Mazhar Ali Kalyar, Zulfiqar Ali Raza, Aayesha Shoukat, Rubaila Waseem, Muhammad Aslam
Summary: Polyvinyl alcohol (PVA) nanocomposite strips embedded with graphene nanosheets and copper-ferrite nanoparticles were synthesized using solution casting technique. Laser pulse irradiations were then applied to modify the structural, optical, and electrical properties of the strips, showing potential for optoelectronic devices.
OPTICAL MATERIALS (2024)
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Article Materials Science, Multidisciplinary
Angular non-critical phase-matching second harmonic generation with the Ba3(ZnB5O10)PO4 crystal
Yunru Chen, Jialing Wu, Jiajia Wang, Shihui Ma, Hongwei Yu
Summary: This paper investigates the angular non-critical phase-matching second-harmonic-generation properties of Ba3(ZnB5O10)PO4 crystal and explores its potential applications in the output spectral regions.
OPTICAL MATERIALS (2024)
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Article Materials Science, Multidisciplinary
Two noncentrosymmetric alkali metal phosphates MZnPO4 (M = Rb, Cs) with honeycomb-like structures
Qun Jing, Menglin Zhu, Lu Li, Xu Ji, Haiming Duan, Henglei Chen, Ming-Hsien Lee
Summary: The paper introduces two new nonlinear optical materials, MZnPO4 (M = Rb, Cs), synthesized by cation substitution. These materials exhibit a honeycomb-like structure and show mild SHG responses with short absorption edges. The thermal properties, IR spectra, and theoretical calculations of the materials are also discussed.
OPTICAL MATERIALS (2024)
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Article Materials Science, Multidisciplinary
Evaluation of microscale crystallinity modification induced by laser writing on Mn3O4 thin films
Camila Ianhez-Pereira, Akhil Kuriakose, Ariano De Giovanni Rodrigues, Ana Luiza Costa Silva, Ottavia Jedrkiewicz, Monica Bollani, Marcio Peron Franco de Godoy
Summary: This study aims to evaluate the crystalline changes induced by ultrafast laser micromachining on manganese oxide thin films using micro-Raman spectroscopy. The results show that laser-writing is effective in locally modifying low-crystallinity films and increasing crystallite sizes, highlighting an interesting approach to evaluate laser-induced structural modifications on metal oxide thin films.
OPTICAL MATERIALS (2024)
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Article Materials Science, Multidisciplinary
Studies of luminescence traits and Judd-Ofelt analysis of Sm3+ activated oxyfluoride glasses
Kamal Bansal, Neeraj Kumar Mishra, Ibrahim Abdullahi, Param Jeet Singh, Mohit Tyagi, Sukhpal Singh
Summary: A novel Sm3+ activated oxyfluoride glass was synthesized and its structure and properties were analyzed. The glass showed potential applications in lasers, optical temperature sensing, and high-energy scintillators.
OPTICAL MATERIALS (2024)
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Article Materials Science, Multidisciplinary
Design and optimization of the performance of self-powered Sb2S3 photodetector by SCAPS-1D simulation and potential application in imaging
Xingjian Wang, Zhixu Wu, Jiawei Zhu, Yubin Kang, Mengqiang Cai, Yong Xia, Hui Deng
Summary: Antimony sulfide (Sb2S3) has been investigated as a promising material for visible light photodetectors due to its non-toxicity, stability, and high absorption coefficient. In this study, we systematically explored the impact of key parameters on the performance of Sb2S3 devices using simulation and successfully fabricated self-powered photodetectors with high responsivity and specific detectivity. Furthermore, we demonstrated the application of the Sb2S3 detector in a scanning imaging system, showcasing its potential for developing new types of visible light detectors and imaging systems.
OPTICAL MATERIALS (2024)
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Article Materials Science, Multidisciplinary
Gamma-irradiated fluorophosphate glasses doped with various transition metals: A spectroscopic study
O. I. Sallam, R. M. Ahmed
Summary: The 20NaF-60P2O5-20Na2O fluorophosphate glass systems doped with 3 wt% of CoO and NiO were investigated for their optical parameters before and after gamma irradiation. The presence of defects within the glass network and the addition of transition metals were found to affect the properties of the composites. After irradiation, a red shift was observed in the dissipation factor spectrum. The energy lost at the surface of the composites was larger than the energy lost within the constituent materials. All investigated composites showed insulating behavior and exhibited increased nonlinear optical parameters after irradiation, with the CoO-doped composite showing the highest values.
OPTICAL MATERIALS (2024)
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Article Materials Science, Multidisciplinary
Down-conversion emission of Er3+doped sulfophosphate glass: The role of TiO2 and Ag nanoparticles co-embedment
Fahimeh Ahmadi, Zeinab Ebrahimpour, Asghar Asgari, Bao Van
Summary: In this study, Er3+-doped sulfophosphate glasses containing titanium nanoparticles (TiO2 NPs) and different concentrations of silver nanoparticles (AgNPs) were synthesized. The impact of AgNPs on the physical and structural characteristics, optical absorption and emission features, and photocatalytic activity of the glasses were investigated. The results showed that the addition of AgNPs enhanced the emission intensity of the glasses, with the system containing 0.04 mol% of AgNPs exhibiting optimal performance. Furthermore, the presence of AgNPs and TiO2 NPs in the glass matrix positively affected the photocatalytic performance.
OPTICAL MATERIALS (2024)
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Article Materials Science, Multidisciplinary
Blue LD-pumped continuous wave a-cut Pr3+:LiYF4 near-infrared laser at 868 nm
Zhuang Li, Rongfei Huang, Wei Yuan, Shaoqiang Zheng, Wenlu Liao, Huiying Xu, Zhiping Cai
Summary: This study reports the first realization of an 868 nm Pr:YLF laser pumped by an InGaN blue laser diode. The laser achieved a maximum power of 641 mW with stable output and good beam quality. The experimental results were in agreement with theoretical simulations.
OPTICAL MATERIALS (2024)
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Article Materials Science, Multidisciplinary
Direct detection of dopamine using zinc oxide nanowire-based surface plasmon resonance sensor
Bhishma Karki, Youssef Trabelsi, Amrindra Pal, Sofyan A. Taya, Ram Bharos Yadav
Summary: This study proposes an SF11 Prism- Ag- ZnO nanowires-CeO2-Sensing layer-based surface plasmon resonance sensor for measuring dopamine concentration in human blood. The sensor demonstrates high sensitivity and detection accuracy, and holds significant importance for early diagnosis of neurological diseases.
OPTICAL MATERIALS (2024)
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Article Materials Science, Multidisciplinary
DFT theoretical and experimental investigations of the effect of Cu doping within SILAR deposited ZnS
M. Taoufiq, A. Soussi, A. Elfanaoui, A. Ait Hssi, S. Baoubih, A. Ihlal, K. Bouabid
Summary: In this study, the effect of copper doping within ZnS on glass substrates was investigated through experimental and theoretical approaches. Pure ZnS and Cu-doped ZnS films with varying copper concentrations were deposited on glass substrates using the SILAR technique. The structural, morphological, and optical properties of the films were characterized, and the theoretical FP-LAPW method based on density functional theory was employed to study the properties of copper-doped ZnS.
OPTICAL MATERIALS (2024)
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