Article
Chemistry, Analytical
Mengyun Hu, Shencheng Shi, Min Yan, E. Wu, Heping Zeng
Summary: The multidimensional-plasma-grating-induced breakdown spectroscopy (MIBS) technique is greatly influenced by laser polarization and inter-pulse delay. Compared to GIBS, MIBS shows a two-fold increase in signal intensity and about a 20% increase in induced plasma lifetime. Furthermore, the limit of detection (LOD) with MIBS is reduced by approximately 22.4 ppm, indicating its promising potential as an alternative method for trace element detection.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2022)
Article
Instruments & Instrumentation
Kyle S. S. Latty, Kyle C. C. Hartig
Summary: The study explores the use of LIBS with femtosecond laser pulses to characterize dry aerosols in air. The interactions between discrete particles and laser-produced plasma are observed to have an impact on the behavior of air breakdown and plasma evolution. The emission signal collected is found to be dependent on particle proximity and plasma expansion behavior.
APPLIED SPECTROSCOPY
(2023)
Article
Thermodynamics
Brendan McGann, Timothy M. Ombrello, David M. Peterson, Ez Hassan, Stephen D. Hammack, Campbell D. Carter, Tonghun Lee, Hyungrok Do
Summary: Nanosecond-gated laser-induced breakdown spectroscopy (n-LIBS) was used to quantify fuel mole fraction in a high-speed combustor, showing unexpected results in low concentration fuel regions. An improved direct spectrum matching calibration matrix and comparison between different laser systems reduced measurement uncertainty and demonstrated insensitivity to specific lasers. Comparison between n-LIBS and numerical results provided good overall agreement, highlighting the importance of n-LIBS in diagnostic model testing.
COMBUSTION AND FLAME
(2021)
Article
Optics
Heng Zuo, Ralf Heilmann, Mark Schattenburg
Summary: This paper presents a method for mirror figure correction and stress compensation using femtosecond laser micromachining technique, which successfully generates isotropic and anisotropic stress states on thin flat silicon mirrors for future space-based x-ray telescopes. The study shows how femtosecond lasers can selectively modify stress states on mirror surfaces, providing a beneficial approach for high-throughput correction of thin-shell mirrors in space applications.
Article
Optics
Yanming Zhang, Yusuke Ito, Huijie Sun, Naohiko Sugita
Summary: A pump-probe imaging method was developed to directly observe and evaluate the processing phenomena during femtosecond laser machining of zirconia ceramics. The method allowed for clear imaging and investigation of electron excitation, shockwave propagation, plasma evolution, and hole formation occurring on various timescales.
Article
Multidisciplinary Sciences
Cristian Sarpe, Elena Ramela Ciobotea, Christoph Burghard Morscher, Bastian Zielinski, Hendrike Braun, Arne Senftleben, Josef Rueschoff, Thomas Baumert
Summary: Surgery is the primary treatment option for solid cancerous tumors. This study explores the use of femtosecond Laser-Induced Breakdown Spectroscopy (LIBS) and Machine Learning algorithms to differentiate cancerous tissue. The results show that LIBS with femtosecond lasers can accurately identify tissue type in the intraoperative surgical field, making it a potential clinical application.
SCIENTIFIC REPORTS
(2023)
Article
Multidisciplinary Sciences
D. Chaitanya Kumar Rao, Veena S. Mooss, Yogeshwar Nath Mishra, Dag Hanstorp
Summary: In this study, the spatio-temporal evolution, interaction, and dynamics of filamentation-induced bubbles in a liquid pool were investigated by varying laser pulse energies, liquid media, and the number of pulses. The results showed that the length and diameter of the bubbles exhibited a logarithmic dependence on laser energy, regardless of the medium. The size distribution of persisting microbubbles could be controlled by adjusting the pulse energy and the number of pulses. Furthermore, the introduction of consecutive pulses led to strong interaction and coalescence of pulsating bubbles, as well as influencing the population density and size distribution of the micro-bubbles.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Ceramics
Chen Mingyue, Yan Zhichao, Chen Jing, Li Minjuan, Liu Zhiyong, Cai Chuanbing
Summary: This study investigated the effects of Cl addition on the grain orientation, microstructure, and superconductivity of YBCO thin films grown by BaCl2/BaF2 pathway. It also explored the mechanism of the phase transition of YBCO thin films in this pathway through thermochemical calculations. The results showed that Cl addition inhibited the formation of alpha-axis grain orientation and promoted the nucleation of c-axis grains. The critical current density (Jc) of the YBCO film significantly increased to 2.07 MA/cm² (77 K, self-field) after Cl addition. Additionally, the phase transition process indicated that Cl preferentially combined with Ba to form BaCl2, effectively avoiding the formation of BaCO3. This study suggests that Cl addition facilitates the preparation of YBCO superconducting thick films and provides a new approach for YBCO preparation using the MOD method.
JOURNAL OF INORGANIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Cunhong Wang, Cong Liu, Xingyi Zhang, You-He Zhou
Summary: The study aims to investigate the influences of temperatures, applied magnetic fields, and laser activating sites on the PTV of YBCO thin films, as well as the relationship between avalanche velocities and laser activating sites. The experimental results and constructed theoretical models help to understand the characteristics of flux avalanche in YBCO films, which are significant for evaluating the flux stability in practical applications of high-temperature superconducting films.
EXPERIMENTAL MECHANICS
(2021)
Article
Spectroscopy
L. Nagli, A. Prosnyakov, M. Gaft, Y. Raichlin
Summary: By investigating Laser-Induced Breakdown Spectroscopy (LIBS) and Laser-Induced Plasma Lasers (LIPL) in elongated Laser-Induced Plasma (LIP), it is found that their behavior towards ablation laser pulses is similar and they exhibit two peaks in intensity dependencies on laser pulses. The second peak observed at a large number of ablation pulses may be attributed to the thermal properties of the sample, especially thermal capacity and thermal diffusivity.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(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
Chemistry, Analytical
Ding Wu, Liying Sun, Jiamin Liu, Yan Lyu, Huace Wu, Shu Yuan, Ran Hai, Cong Li, Chunlei Feng, Dongye Zhao, Hongbin Ding
Summary: Gas pressure has a significant impact on plasma plume expansion and spectral emission, with 10-100 Pa pressure and 200-500 ns delay time being the optimal conditions for LIBS application in tokamak wall material diagnosis.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2021)
Article
Biochemical Research Methods
Jun ZHang, Christine Rrank, Patrick Byers, Sasa Djordjevic, Denitsa Docheva, Hauke Clausen-Schaumann, Stefanie Sudhop, Heinz P. huber
Summary: In this study, the dynamics of femtosecond laser induced bio-printing with cell-free and cell-laden jets were investigated under varying laser pulse energy and focus depth. The thresholds for the first and second jet were exceeded by increasing the laser pulse energy or decreasing the focus depth, resulting in more laser pulse energy converted to kinetic jet energy. The observed jet forms were quantified using dimensionless hydrodynamic Weber and Rayleigh numbers, and the Rayleigh breakup regime was identified as the preferred process window for single cell bioprinting. The best spatial printing resolution of 42 +/- 3 μm and single cell positioning precision of 12.4 μm were achieved within this window, which is less than one single cell diameter of about 15 μm.
BIOMEDICAL OPTICS EXPRESS
(2023)
Article
Engineering, Electrical & Electronic
Gengxu Chen, Weijie Yu, Yanxue Hao, Gang Peng, Xipeng Yu, Yan Dai, Huipeng Chen, Tailiang Guo
Summary: Arrays of high-resolution and flexible organic thin-film transistors (OTFTs) were fabricated using femtosecond laser, enabling the development of flexible wearable electronic devices.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Optics
Aurelien Favre, Vincent Morel, Arnaud Bultel, Gilles Godard, Said Idlahcen, Mathilde Diez, Christian Grisolia, Frederic Perry
Summary: The Laser-Induced Breakdown Spectroscopy (LIBS) technique was used to control the ablation of a tungsten layer on plasma facing components. The study found that the ablation rate of the tungsten layer obtained by physical vapor deposition (PVD) was lower compared to bulk tungsten, and the ablation process could lead to the formation of secondary craters. Additionally, spectroscopic monitoring allowed for real-time measurement of the deposited layer thickness, and using a defocused laser beam reduced the ablation rate.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Stefan Trautner, Johannes Lackner, Wolfgang Spendelhofer, Norbert Huber, Johannes D. Pedarnig
ANALYTICAL CHEMISTRY
(2019)
Article
Chemistry, Physical
Bekele Hailegnaw, Getachew Adam, Dominik Wielend, Johannes David Pedarnig, Niyazi Serdar Sariciftci, Markus Clark Scharber
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Optics
Stefan Grunberger, Georg Watzl, Norbert Huber, Simon Eschlbock-Fuchs, Josef Hofstadler, Andreas Pissenberger, Hubert Duchaczek, Stefan Trautner, Johannes D. Pedarnig
OPTICS AND LASER TECHNOLOGY
(2020)
Article
Physics, Applied
B. Aichner, K. L. Mletschnig, B. Mueller, M. Karrer, M. Dosmailov, J. D. Pedarnig, R. Kleiner, D. Koelle, W. Lang
LOW TEMPERATURE PHYSICS
(2020)
Article
Multidisciplinary Sciences
Rehan Ahmad, Khurram Siraj, Rabia Mushtaq, Muneeb Irshad, Johannes David Pedarnig
Summary: The study shows that femtosecond laser irradiation significantly modifies the optical properties and surface morphology of CuBO2 thin films, resulting in the formation of different microscale structures and microspheres, with an increase in transmission value as the number of laser pulses increases.
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION A-SCIENCE
(2021)
Article
Physics, Applied
H. Richter, W. Lang, M. Peruzzi, H. Hattmansdorfer, J. H. Durrell, J. D. Pedarnig
Summary: Thin films of high-temperature superconductor HgBa2CaCu2O6 were prepared on SrTiO3 substrates by pulsed-laser deposition and annealing in a mercury-vapor atmosphere. The microstructural properties were analyzed by X-ray analysis and atomic force microscopy, showing similar superconducting properties despite morphological variations. Hall measurements provided estimates of carrier scattering defects and vortex pinning properties inside the grains in the superconducting state.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Gernot Heine, Wolfgang Lang, Roman Roessler, Johannes D. Pedarnig
Summary: The resistivity and the Hall effect in the copper-oxide high-temperature superconductor YBa2Cu3O7-delta (YBCO) show significant anisotropy. Using a thin film of YBCO grown on an off-axis cut SrTiO3 substrate allows for investigation of these anisotropic transport properties. The results indicate that vicinal thin films may also be useful for studying other layered nanomaterials.
Article
Instruments & Instrumentation
Nikolaos Giannakaris, Anna Haider, Christoph M. Ahamer, Stefan Gruenberger, Stefan Trautner, Johannes D. Pedarnig
Summary: The femtosecond laser-induced breakdown spectroscopy technique is used to detect tiny amounts of mass and measure chemical images with high spatial resolution. The experimental setup optimization allows for recording spectra of thin metal layers and the orthogonal double-pulse fs-LIBS enhances emission line intensities and contrast of chemical images.
APPLIED SPECTROSCOPY
(2022)
Review
Chemistry, Multidisciplinary
Johannes D. Pedarnig, Stefan Trautner, Stefan Gruenberger, Nikolaos Giannakaris, Simon Eschlboeck-Fuchs, Josef Hofstadler
Summary: Laser-induced breakdown spectroscopy (LIBS) is a rapidly developing technique used for chemical materials analysis and in-line chemical sensing in industrial production. It has unique capabilities for element analysis and multi-element detection, particularly for technology materials essential for high-tech devices.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Analytical
Stefan Gruenberger, Valentin Ehrentraut, Simon Eschlboeck-Fuchs, Josef Hofstadler, Andreas Pissenberger, Johannes D. Pedarnig
Summary: The optical emission of plasma induced by LA-SD-OES and LIBS on industrial steel samples shows different behaviors. LA-SD-OES provides similar emission and crater size for all samples, while LIBS exhibits a pronounced dependence on the steel matrix. This difference is attributed to the different sampling and plasma excitation processes.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Physical
Sandra Keppert, Bernd Aichner, Rajdeep Adhikari, Bogdan Faina, Wolfgang Lang, Johannes D. Pedarnig
Summary: Bi2Sr2Ca1Cu2O8+d (Bi-2212) thin films with thicknesses less than 50 nm are grown on (001) LaAlO3 substrates by pulsed laser deposition (PLD). Phase-pure and smooth c-axis oriented Bi-2212 films with optimal oxygen doping and high Tc0 and Jc(60K) are obtained. The films on LAO substrates decompose at high temperatures, while films on MgO and SrTiO3 substrates are stable. The magnetic field-induced suppression of Tc0 is stronger for films with impurity phases compared to phase-pure films.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
N. Giannakaris, P. Siozos, V. Pinon, S. P. Banerjee, M. Sentis, J. D. Pedarnig, D. Anglos
Summary: In this study, we demonstrate the use of UV femtosecond single-pulse and double-pulse laser-induced breakdown spectroscopy (LIBS) as an effective method for depth profiling of nanometer-thick multilayered structures. The femtosecond LIBS technique enables selective detection of organic and inorganic materials at different depths within the samples. By applying the double-pulse LIBS technique, the analytical capabilities of the method are enhanced and the emission intensity is increased.
APPLIED SURFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Bernd Aichner, Benedikt Mueller, Max Karrer, Vyacheslav R. Misko, Fabienne Limberger, Kristijan L. Mletschnig, Meirzhan Dosmailov, Johannes D. Pedarnig, Franco Nori, Reinhold Kleiner, Dieter Koelle, Wolfgang Lang
ACS APPLIED NANO MATERIALS
(2019)
Article
Spectroscopy
Piyali Deb Barman, Ashok Kumar Maurya, Subhendu Ghosh, Ankit Roy, Mukul Madaan
Summary: In X-ray spectroscopic studies, K beta 1,3 lines have been used to examine the chemical states of 3d transition metals, but are not suitable for characterizing iron oxides. Instead, FeL-lines, which involve the valence shell 3d electrons, were inspected and found to provide information on the chemical states of iron. The study established a linear relationship between the chemical shift of FeL beta 1 line and spin multiplicity, allowing for the speciation of iron.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2024)