Article
Optics
Yuanxin Tan, Longfei Ji, Zhaoxiang Liu, Dongwei Li, Zuoqiang Hao, Yingying Ren, Haisu Zhang, Ya Cheng, Yangjian Cai
Summary: In this study, the optical vortex beam is introduced into the simultaneous spatial and temporal focusing (SSTF) technique, and the local control of peak intensity distribution at the focus of a simultaneous spatiotemporally focused optical vortex (SSTF OV) beam is demonstrated theoretically and experimentally. To avoid nonlinear self-focusing in the conventional focusing scheme, a spatiotemporally focused femtosecond laser vortex beam is employed to achieve doughnut-shaped ablation and high aspect ratio microchannels on the back surface of glass and silica substrates.
Article
Optics
Dominik Kuehn, Alexander Treffer, Frank Wyrowski, Ruediger Grunwald
Summary: This study extends the basic approach of simultaneous spatio-temporal focusing of ultrashort pulses by superimposing two reciprocal sub-beams in a dual-channel stretcher-compressor setup. The spatial modulations of the symmetrized focal zones of few-cycle near-infrared pulses are investigated through parametric numerical simulations, and their relationships to specific ultrafast interference phenomena are addressed.
Article
Multidisciplinary Sciences
Anita Devi, Sumit Yadav, Arijit K. De
Summary: Recent studies have revealed how laser trapping dynamics under femtosecond pulsed excitation are finely tuned by optical and thermal nonlinearities. This study presents experimental results of trapping single and multiple polystyrene beads (1 µm diameter) and demonstrates the spatial and temporal resolution provided by integrating bright-field video microscopy with confocal detection of backscatter. The spatiotemporal detection has promising applications in exploring controlled laser trapping and manipulations driven by optical and thermal nonlinearities.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Applied
Y. Hironaka, K. Shigemori, N. Ozaki, T. Kurita, R. Kodama
Summary: When a laser is focused on an underwater object, the plasma confinement effect causes a large amount of pressure. This results in the formation of a hemispherical bubble on the object's surface, which generates high pressure when it collapses. Experimental analysis using different laser energies showed that the maximum pressure ranged from 10% to 40% of the laser ablation pressure, and the pressure pulse width was 5-10 times longer than the laser pulse width. The collapse pressure of the bubble depended on the energy of water vapor within the bubble, rather than the maximum bubble size.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Physics, Fluids & Plasmas
Xuecheng Ye, Thomas Vojta
Summary: This study investigates the absorbing-state phase transition in the one-dimensional contact process under the influence of spatial and temporal random disorders. The results show that the decoupling of spatial and temporal disorders affects the stability of the directed percolation universality class, and the simultaneous presence of both disorders affects the Griffiths singularities in the nonequilibrium phase transition.
Article
Materials Science, Multidisciplinary
Xiangjing Guo, Haiying Song, Yachao Li, Peng Wang, Shibing Liu
Summary: In this paper, a colloidal solution of silicon carbide (SiC) nanoparticles is obtained using femtosecond laser ablation. The nanoparticles are spherical and uniform in size with an average diameter of 2.84 nm. The crystal structure of the nanoparticles is confirmed to be 4H-SiC. The colloidal solution exhibits strong absorption in the ultraviolet region and the SiC nanoparticles show reverse saturation absorption characteristics.
Article
Materials Science, Multidisciplinary
Jinmin Lee, Hyeryeong Lee, Minchae Kang, Murat Baday, Sang Hak Lee
Summary: Recent advanced biophysical techniques enable real-time monitoring of cellular dynamics of biologically important molecules. In this study, we employed upconversion nanoparticles (UCNPs) that exhibit no photobleaching or photoblinking and eliminate background noise. Using a femto-second laser, we achieved precise single-molecule localization accuracy.
CURRENT APPLIED PHYSICS
(2022)
Article
Environmental Sciences
James Gahan, David R. Bellwood, Leo Nankervis, Sterling B. Tebbett
Summary: This study analyzed the characteristics of zooplankton communities in the offshore regions of the Queensland shelf using Australian data and found that the composition of these communities was predictable at a broad taxonomic level, but the variation in relative abundance was unpredictable.
MARINE ENVIRONMENTAL RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Yasir F. Joya, Bing Yan, Kelvin James, Liyang Yue, Simon C. Middleburgh, Zengbo Wang
Summary: There is a high demand for unique logos and security markings on diamonds and gemstones for anti-counterfeiting purposes and traceability. This study proposes a novel two-lens focusing system for inscribing diamonds at a microscale with high throughput using ultrafast laser scanning technology, achieving high-contrast data matrix codes and serial numbers without causing defects or cracking. The system offers a 7x improvement in marking resolution compared to traditional lenses, with the added benefits of simplicity and flexibility for industrial laser marking systems.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Optics
Fengqin Huang, Jinhai Si, Tao Chen, Tianlun Shen, Mengjie Shi, Xun Hou
Summary: This study investigated the transient temporal-spatial evolution of femtosecond laser pulse-induced filaments and electronic plasma in fused silica using fs time-resolved pump-probe shadowgraphy. It was found that the material damage threshold occurred at 8 μJ pump energy, beyond which laser-induced damage occurred. These results suggest that fs time-resolved pump-probe shadowgraphy is a meaningful tool for predicting the distribution of laser-induced microstructures in ultrafast laser micromachining.
Review
Pharmacology & Pharmacy
Mingzhao Zhu
Summary: Rational vaccine design is considered an important direction in research and development, with lymph node targeting being a popular strategy for enhancing vaccine efficacy. In addition to LN targeting, cellular targeting and even subcellular compartment targeting should be considered to optimize immune response.
ADVANCED DRUG DELIVERY REVIEWS
(2021)
Article
Optics
Rajendhar Junjuri, Samuel Anurag Nalam, E. Manikanta, S. Sree Harsha, P. Prem Kiran, Manoj Kumar Gundawar
Summary: The spatial and temporal characteristics of copper (Cu) plasma generated by femtosecond laser filaments were investigated. It was found that the center of the filament is the best position to obtain maximum signal intensity and persistence time, which can enhance the application of this technique in various fields.
Article
Multidisciplinary Sciences
Hirokatsu Yumoto, Takahisa Koyama, Akihiro Suzuki, Yasumasa Joti, Yoshiya Niida, Kensuke Tono, Yoshitaka Bessho, Makina Yabashi, Yoshinori Nishino, Haruhiko Ohashi
Summary: Researchers have achieved high resolution focusing and single-particle imaging of non-crystalline objects using precise multilayer mirrors. This technique provides higher fluence and unprecedented 2-nanometer resolution, enabling the exploration of the relationship between dynamic structures and functions of native biomolecular complexes.
NATURE COMMUNICATIONS
(2022)
Article
Optics
M. D. T. McDonnell, J. A. Grant-Jacob, M. Praeger, R. W. Eason, B. Mills
Summary: Researchers demonstrated the use of neural networks to simulate complex mapping relationships in laser machining process, solving the challenge by using a separate neural network as the loss function.
Review
Environmental Sciences
Sukhbir Singh, Hema, Neelam Sharma, Monika Sachdeva, Tapan Behl, Ishrat Zahoor, Neeraj Kumar Fuloria, Mahendran Sekar, Shivkanya Fuloria, Vetriselvan Subramaniyan, Amal M. Alsubayiel, Hamed Ghaleb Dailah, Tanveer Naved, Saurabh Bhatia, Ahmed Al-Harrasi, Lotfi Aleya
Summary: Neurodegeneration refers to the loss of neuronal capacity and structure over time, leading to neurodegenerative disorders such as Alzheimer's, amyotrophic lateral sclerosis, Parkinson's, and Huntington's disease (HD). This review primarily focuses on HD, a common single-gene neurological disorder. HD affects the entire body and brain, with a mutant huntingtin polyglutamine sequence that leads to apoptosis and dysfunction. Nanoparticles have emerged as a promising strategy for the treatment of HD, as they can cross the blood-brain barrier and reduce drug toxicity. This review provides an overview of HD, including its symptoms, genetics, and management, and discusses the latest studies on nanotechnology-related technologies for HD treatment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
C. Donate-Buendia, P. Kuernsteiner, F. Stern, M. B. Wilms, R. Streubel, I. M. Kusoglu, J. Tenkamp, E. Bruder, N. Pirch, S. Barcikowski, K. Durst, J. H. Schleifenbaum, F. Walther, B. Gault, B. Goekce
Summary: The study compares the performance of ODS steels prepared with yttrium oxide nanoparticles using dielectrophoretic controlled adsorption under different manufacturing techniques. LPBF samples demonstrated better mechanical response and more homogeneous distribution of nanoparticles compared to DED samples.
Review
Chemistry, Physical
Ihsan Murat Kusoglu, Carlos Donate-Buendia, Stephan Barcikowski, Bilal Goekce
Summary: Research on Laser Powder Bed Fusion (L-PBF) of polymer powder feedstocks has increased over the last decade. The most employed polymer powder feedstocks are PA12, PEEK, and TPU, with additives found to enhance mechanical and functional properties.
Correction
Multidisciplinary Sciences
Ruksan Nadarajah, Joachim Landers, Soma Salamon, David Koch, Shabbir Tahir, Carlos Donate-Buendia, Benjamin Zingsem, Rafal E. Dunin-Borkowski, Wolfgang Donner, Michael Farle, Heiko Wende, Bilal Gokce
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Ruksan Nadarajah, Joachim Landers, Soma Salamon, David Koch, Shabbir Tahir, Carlos Donate-Buendia, Benjamin Zingsem, Rafal E. Dunin-Borkowski, Wolfgang Donner, Michael Farle, Heiko Wende, Bilal Goekce
Summary: The development of magnetocaloric materials is viewed as a key technology for reducing CO2 emissions in air conditioning and cooling systems. Fe-Rh has shown promise as a material for heat exchange, with potential applications in waste heat management. Laser synthesis of Fe-Rh nanoparticles and laser printing of Fe-Rh nanoparticle inks have been studied as methods to generate 2D magnetocaloric structures.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Paula Fabiana Santos Pereira, Ana Carolina Alves de Paula e Silva, Bruna Natalia Alves da Silva Pimentel, Ivo Mateus Pinatti, Alexandre Zirpoli Simoes, Carlos Eduardo Vergani, Debora Ferreira Barreto-Vieira, Marcos Alexandre Nunes da Silva, Milene Dias Miranda, Maria Eduarda Santos Monteiro, Amanda Tucci, Carlos Donate-Buendia, Gladys Minguez-Vega, Juan Andres, Elson Longo
Summary: This study reports the synthesis of chitosan/alpha-Ag2WO4 composites using femtosecond laser irradiation, which exhibit antimicrobial activity against bacteria and yeast, as well as the ability to inactivate SARS-CoV-2 virus. The composites show good biocompatibility with keratinocyte cells and are non-cytotoxic. The results suggest that these composites are highly efficient materials for killing microorganisms and inactivating SARS-CoV-2.
SCIENTIFIC REPORTS
(2022)
Article
Optics
Maximilian Spellauge, Carlos Donate-Buendia, Stephan Barcikowski, Bilal Goekce, Heinz P. Huber
Summary: Laser ablation in liquids is an interdisciplinary method that can generate surfactant-free and stable nanoparticles from almost any material. Ablation dynamics occurring on a sub-nanosecond timescale are essential for nanoparticle generation. This study visualizes the complete spatiotemporal picosecond laser-induced ablation dynamics of gold in air and water, revealing the significant influence of the water confinement layer on the entire investigated timescale from picoseconds to microseconds.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Optics
Iris Elvira, Andres Puerto, Gladys Minguez-Vega, Adrian Rodriguez-Palomo, Alejandro Gomez-Tornero, Angel Garcia-Cabanes, Mercedes Carrascosa
Summary: This work presents a simple strategy to obtain Au plasmonic patterns by optically induced nanoparticle assembly and demonstrates their application as fluorescence enhancement platforms. The spatial distribution and size of the assembled nanoparticles can be controlled, and the 170-nm patterns show better plasmonic behavior, making them promising candidates for efficient bio-imaging and biosensing techniques.
Article
Chemistry, Multidisciplinary
Inna Y. Khairani, Qiyuan Lin, Joachim Landers, Soma Salamon, Carlos Donate-Buendia, Evguenia Karapetrova, Heiko Wende, Giovanni Zangari, Bilal Goekce
Summary: The synthesis of iron-nickel nanoparticles with control over their properties and oxidation level is challenging due to the presence of water impurities in cost-effective solvents. Pulsed laser ablation in liquid can modulate the properties of the generated nanoparticles, but the influence of water impurities on FeNi nanoparticles was investigated in this study.
Article
Materials Science, Multidisciplinary
Shabbir Tahir, Joachim Landers, Soma Salamon, David Koch, Carlos Donate-Buendia, Anna R. Ziefuss, Heiko Wende, Bilal Goekce
Summary: A method has been developed to generate magnetocaloric microstructures from an equiatomic iron-rhodium (FeRh) bulk target. Paramagnetic near-to-equiatomic solid-solution FeRh nanoparticles are generated through picosecond-pulsed laser ablation in ethanol, and then transformed into printable ink and patterned using a continuous wave laser. FeRh 2D structures with different geometries can be created using laser sintering of magnetocaloric inks.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Physics, Applied
C. Donate-Buendia, M. Spellauge, R. Streubel, F. Riahi, S. Barcikowski, H. P. Huber, B. Goekce
Summary: Nanoparticles (NPs) are widely used in various fields, and developing NP production methods with material and solvent versatility, high purity, and size control is crucial. Pulsed laser ablation in liquids (PLAL) is a promising technique, but controlling NP size remains challenging. To address this, a double pulse configuration with specific inter-pulse delays is proposed, allowing for better control over NP size distribution. Experimental results demonstrate a significant reduction in the large NP fraction by 9 +/- 1 wt% at a pulse delay of 600 ps, suggesting the potential of modifying NP size distribution in PLAL through temporal pulse shaping.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Jianing Liu, Ying Yang, Franziska Staab, Carlos Donate-Buendia, Rene Streubel, Bilal Goekce, Fernando Maccari, Philipp Gabriel, Benjamin Zingsem, Detlef Spoddig, Karsten Durst, Michael Farle, Oliver Gutfleisch, Stephan Barcikowski, Konstantin Skokov, Anna R. Ziefuss
Summary: The use of nanoparticle-modified magnetic microparticle powder feedstock can improve the microstructure of suction-cast Nd-Fe-B-based alloys. Ag nanoparticles result in smaller, more uniform grain sizes, while ZrB2 nanoparticles result in uniformly distributed grain sizes at lower mass loadings. This study highlights the potential of using nanoparticles to develop new powder feedstocks for additive manufacturing, improving the final part's properties.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Engineering, Manufacturing
Jan Lino Kricke, Inna Yusnila Khairani, Bjoern B. J. Beele, Natalia Shkodich, Michael Farle, Adam Slabon, Carlos Donate-Buendia, Bilal Goekce
Summary: Masked stereolithography printing with FeNi nanoparticles enables the production of functionalised magneto-responsive polymer structures, offering possibilities in applications like drug delivery and tissue engineering. The use of field-assisted printing and small concentrations of FeNi nanoparticles allows for control over the composite magnetic properties while reducing the impact on the mechanical properties.
VIRTUAL AND PHYSICAL PROTOTYPING
(2023)
Article
Chemistry, Physical
Inna Y. Khairani, Gladys Minguez-Vega, Carlos Doneate-Buendiea, Bilal Goekce
Summary: Nanoparticles are increasingly important for various applications, and pulsed laser ablation in liquid is a promising method for their production. However, the current production rate is limited, and efforts are being made to scale up the production rate to unlock its full potential. Controlling parameters and developing new strategies can increase the productivity of pulsed laser ablation in liquids.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Proceedings Paper
Materials Science, Biomaterials
A. Puerto, C. Lopez-Fernandez, J. L. Bella, I Elvira, G. Minguez-Vega, A. Garcia-Cabanes, M. Carrascosa
Summary: Utilizing ferroelectric platforms based on photovoltaic LiNbO3:Fe, metallic structures have been assembled from Ag and Au nanoparticles on the surface of the crystal, resulting in plasmonic enhancement for bio-imaging procedures. The fluorescence enhancement of biomaterials tagged with various fluorophores has been investigated, with potential applications for improving bio-imaging. Furthermore, metal nanoparticle patterns are found to induce organization of sperm cells along the nanoparticle fringe structures.
OPTICAL METHODS FOR INSPECTION, CHARACTERIZATION, AND IMAGING OF BIOMATERIALS V
(2021)
