Article
Materials Science, Multidisciplinary
Andreas Tuennermann, Carsten Momma, Stefan Nolte
Summary: Ultrashort pulse lasers have been widely used in precise micromachining. This article presents a brief perspective on the development of this innovative technology from the 1990s until today.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
Do-Hyun Kim, Hyeran Cho, Myeung-jin Lee, Hong-Dae Kim, Dong-Jin Lee, Gyu Tae Kim
Summary: This study reports a method to extract highly crystalline tiny In2O3 QDs from In2O3 powder that exceeds the size range of QDs. Through a series of filtration processes, the QDs were successfully obtained and exhibited significant absorption and photoluminescence in the ultraviolet region. Moreover, the addition of sodium dodecylbenzene sulfonate greatly enhanced the luminescent intensity of the QDs, paving the way for obtaining highly luminescent tiny QDs from other semiconducting powders.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Feifei Wang, Lan Jiang, Changji Pan, Zhipeng Wang, Yiling Lian, Qingsong Wang, Wenpan Tao, Jingya Sun
Summary: Holograms hidden inside transparent materials are important for information encryption storage. By using double-pulse femtosecond laser processing, holograms can achieve improved imaging quality, and the effect and mechanism of self-trapped excitons (STEs) on the ablation have been systematically studied.
Article
Chemistry, Analytical
Igor A. Salimon, Ekaterina V. Zharkova, Aleksandr V. Averchenko, Jatin Kumar, Pavel Somov, Omar A. Abbas, Pavlos G. Lagoudakis, Sakellaris Mailis
Summary: This paper presents a method for the direct laser synthesis of periodically nanostructured 2D transition metal dichalcogenide (2D-TMD) films from single source precursors. Laser synthesis of MoS2 and WS2 tracks is achieved by localized thermal dissociation of Mo and W thiosalts, caused by the strong absorption of continuous wave (c.w.) visible laser radiation by the precursor film. Moreover, the formation of isolated nanoribbons with extreme periodic modulation in the thickness of the laser-synthesized TMD films is observed, which is attributed to the effect known as laser-induced periodic surface structures (LIPSS).
Review
Chemistry, Multidisciplinary
Huilong Liu, Zhijian Sun, Yun Chen, Wenjun Zhang, Xin Chen, Ching-Ping Wong
Summary: This review comprehensively summarizes the recent advances in laser manufacturing and patterning of nanostructured electrodes for flexible in-plane micro-supercapacitors (MSCs). Various laser processing techniques for electrode synthesis, modification, and processing are discussed, highlighting the special features and merits of laser processing. The challenges and prospects associated with laser processing of in-plane MSCs are also discussed.
Article
Engineering, Electrical & Electronic
Alicja Anuszkiewicz, Marcin Franczyk, Dariusz Pysz, Filip Wlodarczyk, Adam Filipkowski, Ryszard Buczynski, Tomasz Osuch
Summary: We have developed a silica-based large mode area fiber with a nanostructured core for use in fiber laser cavities. Our experimental results demonstrate that the fiber operates in single mode with low bending loss. We have also successfully fabricated high reflectivity UV induced fiber Bragg gratings and utilized them in a fiber laser setup. The flexibility of the nanostructuring approach holds promise for the development of passive fiber components that can be matched with any type of active fibers.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Yushi Jin, Yuan Dong, Long Jin, Hua Kang, Guangyong Jin
Summary: A theoretical model of dual-mode rate equation is developed to describe the oscillation mechanism of a visible dual-wavelength double pulse Pr:YLF laser. The insertion angle of F-P etalon and the two-step loss of Q-switching are found to be crucial in controlling dual-wavelength intensity ratio and master-slave pulse energy ratio. Experimental results demonstrate the production of a dual-wavelength double-pulse laser with maximum output power of 98mW, pulse width of 100 ns, and PRF of 10 kHz. To the best of our knowledge, this is the first investigation of a visible dual-wavelength double pulse Pr:YLF laser.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Luminita Nicoleta Dumitrescu, Eusebiu-Rosini Ionita, Ruxandra Birjega, Andrada Lazea-Stoyanova, Maria-Daniela Ionita, George Epurescu, Ana-Maria Banici, Simona Brajnicov, Florin Andrei, Andreea Matei
Summary: This study presents the deposition of thin films of lamellar clays using laser techniques, focusing on the optimization of deposition parameters to achieve highly oriented crystalline films. The films were characterized using various techniques and different wetting properties were achieved by adjusting the deposition techniques and parameters.
Article
Physics, Multidisciplinary
Shengzhe Pan, Wenbin Zhang, Hui Li, Chenxu Lu, Weihua Zhang, Qinying Ji, Hanxiao Li, Fenghao Sun, Junjie Qiang, Fei Chen, Jihong Tong, Lianrong Zhou, Wenyu Jiang, Xiaochun Gong, Peifen Lu, Jian Wu
Summary: The experimental observation of the dissociative above-threshold double ionization (ATDI) of H-2 in strong laser fields confirms classical predictions in both time and energy domains, enhancing the understanding of strong-field phenomena and providing a powerful tool for observing ultrafast dynamics of molecules.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Physical
Jingjing Sun, Xiaojun Chen, Ziyao Mao, Bichan Liu, Ruihua Zhao, Jianping Du
Summary: A facile strategy was proposed to prepare Mo-precursor by coordinating Mo with polysaccharide from natural biomass (jujube) at room temperature. The carbonized Mo-polysaccharide complex resulted in highly dispersed Mo2C nanoparticles on an N-doped carbon matrix. The 2D carbon nanosheets-embedded Mo2C NPs showed excellent electrocatalytic performance for the hydrogen evolution reaction in an alkaline medium.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Manufacturing
Kaiyuan Wu, Jiatong Zhan, Xuanwei Cao, Xiaobin Hong, Peimin Xie
Summary: The study shows that pulse phase and pulse stage have significant effects on metal transfer characteristics and dynamic metal transfer behavior in double-wire double pulse gas metal arc welding. Alternating pulse phase results in alternating transfer of leading and trailing droplets, while synchronous pulse phase leads to simultaneous metal transfer. The pulse phase influences droplet growth and Lorentz force, causing variations in metal transfer patterns and weld bead appearance.
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
(2021)
Article
Optics
Xianshi Jia, Yongqian Chen, Lei Liu, Cong Wang, Ji'an Duan
Summary: With its wide applicability and low-cost processing advantages, laser processing is becoming an alternative to conventional processing technologies. Combined pulse laser (CPL), as a reliable tool for high-quality and high-efficiency processing, utilizes different types of lasers and controls the laser-matter interaction. This review introduces the principles, characteristics, and recent advancements of CPL technology in various applications.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Polymer Science
Daniel Sola, Stephan Milles, Andres F. Lasagni
Summary: Laser interference patterning was used to fabricate linear periodic patterns on the surface of Safrofilcon-A hydrogel, showing that structured height and roughness increased with laser fluence. The structured areas induced a delay in the hydration process, and Raman spectra of hydrated samples recovered the original shape of areas structured at low laser fluence.
Review
Nanoscience & Nanotechnology
Lili Zhao, Zhen Liu, Duo Chen, Fan Liu, Zhiyuan Yang, Xiao Li, Haohai Yu, Hong Liu, Weijia Zhou
Summary: The current understanding and advances in laser synthesis of nanomaterials are summarized, along with the review of laser microfabrication-enabled energy conversion and storage devices. The limitations, solutions, and potential development directions for laser processing of nanomaterials are proposed.
NANO-MICRO LETTERS
(2021)
Article
Chemistry, Analytical
S. Esmailzadeh, T. Shahrabi, Y. Yaghoubinezhad, Gh. Barati Darband
Summary: This study investigates the mechanism of Ni-Se electrodeposition using pulse potential technique, analyzing the nucleation and growth mode under different concentrations and deposition potentials, as well as the dependence of pulse parameters on the nanostructured Ni-Se coating. The results demonstrate a comprehensive understanding of the deposition process and factors influencing the nucleation, growth, morphology, and stoichiometry of Ni-Se nuclei.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Xingpeng Liu, Zezhou Liang, Sanshan Du, Xixi Niu, Junfeng Tong, Chunyan Yang, Xubin Lu, Xichang Bao, Lihe Yan, Jianfeng Li, Yangjun Xia
Summary: A ternary strategy of halogen-free solvent processing can effectively improve the power conversion efficiency of polymer solar cells (PSCs) by introducing an appropriate third component. In this study, the green solvent o-xylene (o-XY) was used as the main solvent, and the non-fullerene acceptor Y6-DT-4F was introduced into the binary system to broaden spectral absorption and optimize morphology, achieving efficient PSCs.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Lihe Yan, Zezhou Liang, Jinhai Si, Pingping Gong, Yufei Wang, Xingpeng Liu, Junfeng Tong, Jianfeng Li, Xun Hou
Summary: This study demonstrates the significant enhancement in power conversion efficiency of polymer solar cells by using halogen-substituted donor materials. The chlorinated polymer enables better stacking behavior and longer emission lifetime. It also facilitates faster dissociation of charge-transfer-state excitons, leading to higher charge-separated state yield.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Hui-Ping Cheng, Phuoc Huu Le, Le Thi Cam Tuyen, Sheng-Rui Jian, Yu-Chen Chung, I-Ju Teng, Chih-Ming Lin, Jenh-Yih Juang
Summary: The correlations among microstructure, surface morphology, hardness, and elastic modulus of Bi2Te3 thin films deposited on c-plane sapphire substrates by pulsed laser deposition are investigated. The results show that the crystallinity of the films can be improved by increasing the substrate temperature. The hardness and elastic modulus of the films decrease with increasing crystallite size, and the grain boundary plays an important role in the deformation characteristics of the films.
Article
Materials Science, Multidisciplinary
Yueli Zhang, Lihe Yan, Yuren Li, Jinhai Si, Wenjiang Tan, Xun Hou
Summary: The nonlinear absorption effect in a Fe-porphyrin metal-organic framework (Co-TCPP(Fe) MOF) was studied using the nanosecond Z-scan technique, showing enhanced reverse saturation absorption (RSA) compared with TCPP(Fe) ligand. The charge transfer dynamics of the MOF were unveiled by femtosecond transient absorption (fs-TA) measurements. The MOF nanosheets exhibited an excellent optical limiting (OL) effect with an OL threshold of 0.89 J/cm2 based on the strong excited state absorption (ESA) caused by CSSs absorption.
OPTICAL MATERIALS EXPRESS
(2023)
Article
Chemistry, Multidisciplinary
Wenyue Xue, Zezhou Liang, Yabing Tang, Chao Zhao, Lihe Yan, Wei Ma, Han Yan
Summary: Organic solar cells (OSCs) have the potential for low-cost and large-scale manufacture through solution-printing. However, the decay in power conversion efficiency (PCE) with thicker active layers hinders the realization of their advantages. By introducing a solid solvation additive, electrical doping with componential selectivity is achieved in the bulk heterojunction (BHJ) film of OSCs, resulting in significant improvements in PCE.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Chenxu Wang, Lihe Yan, Jinhai Si, Tianyu Huo, Xun Hou
Summary: This work successfully prepared CsPbBr3/Cs4PbBr6 core/shell nanocrystals with high photoluminescence quantum yields (87.23%) and long-term stability in ambient environments using a room temperature inverse microemulsion method. The stability was attributed to the protection of Cs4PbBr6, while the high photoluminescence quantum yields were due to the passivation effect of the core/shell structure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Optics
Xiaodan Zhang, Lihe Yan, Yanmin Xu, Jinhai Si, Xun Hou
Summary: In recent years, rhenium disulfide (ReS2) has received much attention for its anisotropic optoelectronic response in polarization dependent photonic applications. Through the use of mechanical exfoliation method, a single crystal layered ReS2 flake with a lateral size of about 10 μm was obtained, and its ultrafast carrier dynamics were studied using transient absorption microscopy. The polarization dependence of the excited carrier concentration of the layered ReS2 flake was observed, which was attributed to the anisotropic linear absorption and electron mobility rates in different orientations. These findings could provide valuable references for the application of ReS2 in polarization sensitive detectors and optoelectronic devices.
OPTICAL ENGINEERING
(2023)
Article
Health Care Sciences & Services
Hung Do Tran, Tran Thanh Hung, Tran Hoang Thuy Phuong, Le Thanh Tam, Hung Gia Tran, Phuoc Huu Le
Summary: This study describes the clinical and subclinical characteristics, treatment progress, and outcomes of 310 cases of SARS-CoV-2 infection. Most patients exhibited clinical symptoms of COVID-19, including cough, fever, shortness of breath, sore throat, loss of smell/taste, and diarrhea. The majority of patients recovered and were discharged, while a few were transferred to higher-level hospitals and a small percentage died. Comorbidity and decreased blood pH were associated with the treatment outcomes of COVID-19 patients.
Article
Optics
Peipei Ma, Lihe Yan, Jinhai Si, Tianyu Huo, Zhenqiang Huang, Wenjiang Tan, Jin Xu, Xun Hou
Summary: Single-crystal MAPbBr(3) microcavities with controllable geometries and sizes are fabricated using a template-limited method combined with an anti-solvent diffusion growth method. These microcavities emit lasers around 550 nm under femtosecond laser excitation, with a low lasing threshold and high quality factor, as well as excellent stability. The temporal-spatial evolution of the lasing process and the complex relationship between the light-induced carrier dynamics and lasing properties are investigated.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Yanmin Xu, Lihe Yan, Anyi Wang, Feng Tian, Xiaojun Huang, Jin Liu
Summary: The optical nonlinearity of molybdenum disulfide/tungsten disulfide heterostructures was investigated using nanosecond laser Z-scan technology, where enhanced saturable absorption behavior was found. The carrier dynamics in the nonlinear response, as well as the enhancement mechanism of the heterostructures, were further clarified using femtosecond time-resolved transient absorption measurements.
Article
Chemistry, Multidisciplinary
Dang Long Quan, Pham Thanh Hai, Phuoc Huu Le, Do Ngoc Son
Summary: This study reports the synthesis and characterization of Pt1Ru1Mx/C-MWCNTs and Pt1Ru1Coy/C-MWCNTs alloy catalysts for the optimization of anode catalyst performance in direct methanol fuel cells. The results showed that Pt1Ru1Co2/C-MWCNTs catalyst exhibited the best performance in methanol oxidation activity and CO tolerance.
RESEARCH ON CHEMICAL INTERMEDIATES
(2023)
Article
Chemistry, Multidisciplinary
Zhenqiang Huang, Wenjiang Tan, Peipei Ma, Lihe Yan, Jinhai Si, Xun Hou
Summary: Lead halide perovskites (LHPs) are a type of material with excellent semiconductor properties, widely used in applications such as solar cells. This study investigates the ultrafast hot carrier dynamics of a single CsPbBr3 microplate using femtosecond Kerr-gated wide-field fluorescence spectroscopy, revealing the temporal evolution of bandgap renormalization and the competition between hot carrier cooling and the recovery of the renormalized bandgap.
Article
Materials Science, Multidisciplinary
Junfeng Tong, Wuyan Liu, Yubo Huang, Zheyu Li, Yan Wang, Suiyan Bai, Zezhou Liang, Lihe Yan, Jianfeng Li, Yangjun Xia
Summary: Perylene diimide (PDI)-based all-polymer solar cells (All-PSCs) have recently gained attention due to their versatility in structural design and stability. However, acceptor-acceptor PDI-based polymeric acceptors (PAs) have shown lower photovoltaic performance compared to other types. In this study, two stable A-A type PAs, PPDI-DTBT and PPDI-DTFBT, were developed using a long 2-octyldodecyl-substituted PDI unit and different subunits. The partially fluorinated PPDI-DTFBT showed improved performance, with increased power conversion efficiency (PCE) of 6.04%. These findings highlight the importance of incorporating fluorine into A-A type PDI-based polymers to enhance device efficiency.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Tianyu Huo, Lihe Yan, Jinhai Si, Peipei Ma, Xun Hou
Summary: The photoinduced carrier dynamics of CsPbBr3 single crystalline perovskite films were investigated using femtosecond time-resolved transient absorption microscopy. The transient absorption spectra of the internal and boundary areas of the perovskite films were obtained, and the processes of hot carrier cooling, defect state trapping, and carrier recombination were analyzed through singular value decomposition and global fitting analysis. The presence of defects at the boundary induced excited state absorption and resulted in shorter lifetimes of the photoinduced carriers due to accelerated non-radiative recombination. This study provides insights into the influence of boundary defects on the performance of single crystalline perovskite devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Zezhou Liang, Lihe Yan, Ning Wang, Jinhai Si, Shujuan Liu, Yufei Wang, Junfeng Tong, Jianfeng Li, Baofeng Zhao, Chao Gao, Xun Hou
Summary: This study investigates the use of a solvent additive, 1-fluoro-2-iodobenzene (OFIB), which efficiently controls the morphology of the active layer in polymer solar cells (PSCs). The addition of OFIB enhances the overall pi-pi stacking in the active layer, resulting in improved power conversion efficiency. The study also offers insights into the mechanism underlying the function of solvent additives and provides a comprehensive research methodology for the development of efficient PSCs.
ADVANCED FUNCTIONAL MATERIALS
(2023)