Article
Chemistry, Physical
Wan-Ying Wang, Gui-Chang Wang
Summary: In this study, the catalytic activity and carbon deposition resistance of 14 Ni3X-type alloy catalysts were calculated using density functional theory. Ni-based catalysts with high activity and stability, such as Ni3V, Ni3Cr, Ni3Mn, Ni3Nb, and Ni3Mo, were selected and considered to have high application potential. Measurement of catalyst activity and stability through descriptors was explored, and the superiority of Ni3Mo catalytic performance was further verified.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Tangchun Wang, Binbin Sun, Weijie Wang, Jinchen Dong, Jianbo Qu, Zhiliang Zhang
Summary: In this study, a novel SERS substrate was fabricated by utilizing gelatin gels and silver nanoparticles. The substrate exhibited excellent sensitivity and detection capability, being able to detect low concentrations of fungicides in lake water. It is expected to serve as a fast and simple method for highly sensitive detection of hazardous contaminants and fungicides in aquaculture fields.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yuan He, Chengwei Sun, Shidong Fang, Muhammad Shaban, Changlun Chen
Summary: A facile NTP treatment was conducted to modify NiCoLDH nanowires, introducing N-doping and oxygen vacancies for improved electrochemical performance. The optimized electrode (P-NiCoNW/CC-150) showed outstanding capacitance performance and excellent cycling stability. An asymmetric supercapacitor device assembled with the electrodes exhibited high energy density.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Younghwan Lee, Se Hyun Kim, Hyun Woo Jeong, Geun Hyeong Park, Jaewook Lee, Young Yong Kim, Min Hyuk Park
Summary: This study investigates the structural, chemical, and electrical properties of Hf0.5Zr0.5O2 under different electrode conditions. The results show that Hf0.5Zr0.5O2 with a Mo electrode exhibits higher remanent polarization and a higher fraction of ferroelectric orthorhombic phase compared to Hf0.5Zr0.5O2 with a TiN electrode. Additionally, the concentration of oxygen vacancies in Hf0.5Zr0.5O2 with a Mo electrode is significantly lower, explaining its wake-up free behavior.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Cheng-zhao Jin, Meng-yuan Liu, Cai-yun Wang, Xin-an Yang, Li-li Yao, Wang-bing Zhang
Summary: The difference in bandgap structure results in better charge separation performance of crystalline/amorphous heterojunctions. Adjusting the facets at the material contact interface can further improve the charge separation performance of such heterojunctions. This article successfully synthesized three novel ZnO/amorphous Bi2WO6 heterojunctions and demonstrated their efficient carrier separation characteristics and excellent photocatalytic performance through photoelectric testing.
APPLIED SURFACE SCIENCE
(2024)
Article
Engineering, Electrical & Electronic
Da Hu, Jiabin Lu, Qiusheng Yan, Yingrong Luo, Ziyuan Luo
Summary: This study introduces a chemical mechanical polishing technique based on metal electrochemical corrosion for single-crystal SiC to address the environmental pollution caused by the polishing solution in chemical mechanical polishing. Wear experiments were conducted to investigate the wear properties of SiC C-surface under different grinding ball materials and solutions. The proposed mechanism of material removal in single-crystal SiC via metal electrochemical corrosion was discussed.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Optics
Shuiwang Wang, Ye Ding, Yuan Li, Congcong Ge, Wanda Xie, Haodong Huo, Lijun Yang, Wei Zhang, Youqing Lu
Summary: A theoretical model is proposed and validated to describe the interaction between Water-Jet Guided Laser (WJGL) and nickel-based superalloy in this study. The evolution of ablation morphology is investigated using numerical simulation and experimental data. The influence rule of machining parameters on microscopic groove morphology is established through orthogonal experiments. The optimized scanning trajectory for high-quality cutting is determined using multi-row cutting experiments.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Bin Hu, Jianhai Han, Junhua Wang, Xiangpan Li
Summary: A mathematical model is proposed to predict the track cross-section profile for wide-band laser cladding. The accuracy of the model is improved by considering the melt pool morphology and powder spatial concentration. The experimental results show that the model can well predict the melt pool width, length, cross-sectional area, as well as the powder efficiency and cladding layer morphology.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
M. A. Lavrukhin, P. A. Bokhan, P. P. Gugin, Dm. E. Zakrevsky
Summary: An experimental study was conducted on the transitions of laser in alkaline earth metals, revealing that laser energy reaches a steady state mode within the pulse and achieves a steady state value of 59 mJ with an average output power of 5.3 W when the pulse frequency is 90 kHz. The experiments show that the energy characteristics of the Ca+ laser are comparable to those of lasers in other metals at a pulse repetition frequency of 100 kHz or higher.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Luis Omenaca, Mikel Gomez-Aranzadi, Isabel Ayerdi, Enrique Castano
Summary: In this paper, a numerical study and experimental validation of the ultrashort single pulse ablation process in aluminum have been conducted, providing a more precise understanding of the thermophysical and optical properties during material heating and ablation.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Qianglong Li, Feng Li, Hongjun Liu, Wei Zhao, Hualong Zhao, Yishan Wang, Wenlong Wen, Xue Cao, Jinhai Si
Summary: A compact all-fiber laser source with short pulse durations and excellent performance is demonstrated using fiber quasi-rectangular pulse pre-shaping technique. The laser source is compact, robust, cost-effective, and anticipated to be widely used in industrial applications.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Xinhu Fan, Youmin Rong, Guojun Zhang, Congyi Wu, Yuxuan Luo, Yu Huang
Summary: Ultrafast laser direct writing technology has been extensively studied in the fabrication of glass-based microfluidic devices. This study investigates the impact of scanning strategies and process parameters on the cross-sectional profile characteristics of microchannels. A new strategy, combining the offset method with the double bidirectional method, is proposed to achieve symmetrical cross-sectional profiles and smooth channel bottoms. The results demonstrate high-quality profiles of microchannels exhibit high efficiency and stability of flow in mixing experiments.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Energy & Fuels
Shahriyar Safat Dipta, Md Habibur Rahaman, Walia Binte Tarique, Ashraful Hossain Howlader, Ayush Pratik, John A. Stride, Ashraf Uddin
Summary: Implementing a double-sided passivation approach can enhance the performance of n-i-p structured PSCs and improve the stability and photovoltaic properties of the cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Optics
Yufeng Tao, Bingjie Wang, Weijie Xu, Xuejiao Wang, Yunpeng Ren, Zhiduo Xin, Kun He, Xiangjun Ma, Guangjian He, Chunsan Deng, Zijie Dai
Summary: The ion-interactive semi-conductive hydrogel is a promising optoelectronic material with desirable electrical conductivity, optical clarity, and switchable dielectric properties. However, the development of actively modulated terahertz (THz) devices using hydrogel is still in its early stages. In this study, a scalable high-throughput picosecond laser system is used to rapidly tailor hydrogel into ion-interactive dielectric metasurfaces (IDMs). These IDMs possess negative permittivity, tunable time/frequency modulation, and high-consistency geometries for specific THz wave manipulations.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Jian-wei Ma, Hui Zhang, Tao Ye, Song-hong-ze Wang, Zhi-Ben Yang, Zhen-yuan Jia
Summary: This study demonstrates the effect of variable cross-section microgrooves on drag reduction through fluid simulation and proposes a novel method called moving zoom laser processing for microgroove fabrication. A continuous wave laser ablation model is established and a planning method for process parameters is introduced. Experimental results verify the feasibility and effectiveness of the proposed method.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
K. Monisha, S. M. Shariff, A. Sekar, Ravi Raju, J. Manonmani, J. Senthilselvan
Summary: This study fabricates a superhard titanium boride coating on titanium surface using high power diode laser alloying. Amorphous boron is transformed into crystalline boron by high-power laser interaction and rapidly combines with titanium to form titanium boride precipitates. The laser borided coating exhibits dendrites and whisker-like microstructures, with microhardness ranging from 800-1600 HV0.2 and extreme hardness of 3800-4700 HV0.2 in some regions of boron precipitates. The formation of TiB and TiB2 phases shows a high negative Gibbs free energy and an activation energy of 140 kJ/mol, indicating the spontaneity of the reaction. The laser borided coating with TiB and TiB2 phases has potential for surface engineering applications.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Haisen Yuan, Yu Li, Jing Zhao, Ling Zhang, Wenjie Li, Yang Huang, Xingyu Gao, Qiadong Xie
Summary: An adaptive fringe projection method is proposed in this paper to solve the failure of coded fringe patterns caused by high reflectivity of measured surfaces. The method utilizes the best projection intensity strategy and coordinate mapping between camera and projection regions. It is robust, convenient, and effectively reduces mapping errors.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Biao Chen, Y. Liu, Daping He, He Chen, Kaikai Huang, Xuanhui Lu
Summary: In this paper, we study the angular deviation and diffraction efficiency of reflection gratings in the Littrow-configuration for external cavity diode laser applications using the rigorous coupled-wave analysis method. We consider the general three-dimensional diffraction case, where the incidence plane is un-parallel with the grating vector, i.e., conical diffraction. The angular tolerance for arbitrary gratings under plane and conical diffraction is derived and presented. Furthermore, we find that selecting appropriate parameter settings can improve the angular tolerance and reflection efficiency, including the incidence angle, diffraction order, grating period, and blazed angle. We also highlight the importance of avoiding slight deviations in the grating vector from the incidence plane, as it can disrupt laser oscillation in the external cavity.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Hee-Lak Lee, Arif Hussain, Yoon Jae Moon, Jun Young Hwang, Seung Jae Moon
Summary: The conditions for obtaining a completely connected ablated line were investigated, and it was found that a higher fluence was needed to form the ablated line properly.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Ying Zhao, Hong Qi, Ya-Tao Ren, Ming-Jian He, Bao-Hai Gao, Wen Cheng
Summary: The reconstruction of optical parameters is of great research significance and practical value in biological tissue functional imaging, and has received increasing attention in the field of medical diagnosis and treatment. This paper proposes an improved sequential quadratic programming method to overcome the difficulties in the reconstruction process and achieve high accuracy and efficiency in estimating target parameters, with good robustness. Additionally, a time-frequency coupling model is constructed and demonstrated in a biological tissue-like medium model, showing its practical significance.
OPTICS AND LASER TECHNOLOGY
(2024)
