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
Instruments & Instrumentation
Jeremy C. Marvin, Emma J. Blanchette, Sydney C. Sleiman, Haiqa Arain, Emily A. Tracey, Steven J. Rehse
Summary: Enhanced emission was observed in the LIBS atomic emission spectra of bacterial cells deposited upon a nitrocellulose filtration medium in the presence of one-micron silver microparticles. The emission intensity for phosphorus, magnesium, calcium, and sodium was significantly increased due to the ablation with silver microparticles.
APPLIED SPECTROSCOPY
(2022)
Article
Chemistry, Analytical
Wei Ke, Xiaohua Wang, Minyuan Chen, Huan Yuan, Aijun Yang, Jifeng Chu, Dingxin Liu, Mingzhe Rong
Summary: Laser-induced breakdown spectroscopy (LIBS) is a useful technique for quantitative detection based on the properties of laser-induced plasma (LIP) at local thermodynamic equilibrium (LTE). The influence of ambient pressure on the spatial-temporal evolution of LTE for LIP is still not well understood, and the mechanism of this influence remains unclear.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Instruments & Instrumentation
David M. Surmick, Leon Taleh, Noureddine Melikechi
Summary: The impact of altering laser focusing conditions on laser-induced breakdown spectroscopy experiments was investigated in both ambient Earth laboratory and simulated Martian atmospheres. Results showed that the peak emissions of ionic species occur when the laser plasma is initiated with a focused spot within the sample in ambient Earth laboratory air, while atomic emissions have peak intensities several millimeters deeper into the sample. In simulated Martian atmospheres, atomic emissions peak when the laser is focused within the sample, while ionic emissions have peak intensities near the surface of the sample.
APPLIED SPECTROSCOPY
(2021)
Article
Chemistry, Analytical
Maximilian Weiss, Zuzana Gajarska, Hans Lohninger, Martina Marchetti-Deschmann, Georg Ramer, Bernhard Lendl, Andreas Limbeck
Summary: The growing importance of fluoropolymers in high-tech applications and green technologies has led to an increased demand for their characterization. This study presents a novel approach for quantitative mapping of fluorine in fluoropolymer samples using laser-induced breakdown spectroscopy (LIBS). The approach is based on monitoring molecular emission bands arising from fluorine-containing molecules. The study evaluates two techniques - spray coating and sputter coating - for their effects on sensitivity and spatial resolution in elemental mapping.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Analytical
Ismail Elhamdaoui, Nessrine Mohamed, Samira Selmani, Paul Bouchard, Mohamad Sabsabi, Marc Constantin, Francois Vidal
Summary: This paper discusses the use of conventional LIBS and LIBS-LIF techniques for measuring trace amounts of palladium in solid ore samples. The study optimized the performances of LIBS-LIF for spectrochemical analysis of palladium by studying the combination of excitation/fluorescence of Pd lines and plasma creation conditions. Calibration curves were established using reference materials doped with a palladium solution. The results demonstrated that LIBS-LIF could rapidly measure sub-ppm levels of palladium in solid ore samples without any sample preparation, and it could resolve the spectral interference which is problematic with conventional LIBS.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2022)
Article
Chemistry, Analytical
M. A. Wakil, Zeyad T. Alwahabi
Summary: Microwave-assisted laser induced breakdown spectroscopy (MW-LIBS) is capable of detecting silver in solid and liquid samples, with different limits of detection, and the calibration curve established using a gated detector shows a high level of accuracy.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2021)
Review
Chemistry, Analytical
Qiang Zeng, Jean-Baptiste Sirven, Jean-Christophe P. Gabriel, Chor Yong Tay, Jong-Min Lee
Summary: LIBS has been established as a potential tool for rapid grading of plastics online and a powerful tool for plastic investigations in the laboratory. The review describes the development and prospect of plastic investigations using LIBS, highlighting its intrinsic advantages and discussing the selection of hardware components and analysis methods.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Megha Mohan, Jakub Buday, David Prochazka, Pavel Gejdos, Pavel Porizka, Jozef Kaiser
Summary: In recent years, Laser-Induced Breakdown Spectroscopy (LIBS) has been recognized as a powerful technique for elemental imaging of samples. However, analyzing heterogeneous samples with multiple matrices poses new challenges. In this study, the behavior of plasma plumes at the boundary of two well-defined matrices was investigated using a combination of three-dimensional plasma imaging, spectroscopy, and Mach-Zehnder interferometry. The findings provide valuable insights into the factors that need to be considered when mapping fine heterogeneous structures using LIBS.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Chemistry, Analytical
Megha Mohan, Jakub Buday, David Prochazka, Pavel Gejdos, Pavel Porizka, Jozef Kaiser
Summary: Laser-Induced Breakdown Spectroscopy (LIBS) has become an important technique for elemental imaging of samples, but analyzing heterogeneous samples with multiple matrices presents new challenges. This study investigated the behavior of plasma plumes generated on the boundary of two well-defined matrices using three-dimensional imaging, spectroscopy, and interferometry. The effects of collection optic angles and slight misalignment of the optics on the elemental distribution and signal intensities were analyzed. The findings provide valuable insights into the behavior of plasma plumes at the boundary of matrices and factors to consider when mapping fine heterogeneous structures using LIBS.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Review
Spectroscopy
Giorgio S. Senesi, Russell S. Harmon, Richard R. Hark
Summary: This review discusses the application and performance comparison of laser-induced breakdown spectroscopy (LIBS) instrumentation in in situ measurement, as well as its practical applications in various industries. LIBS technology is important for meeting the demands of fast analysis and portability.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2021)
Article
Materials Science, Multidisciplinary
Amir Fayyaz, Haroon Asghar, Tahani A. Alrebdi
Summary: The laser-induced breakdown spectroscopy (LIBS) technique was used to investigate green fluorite samples. It was found that the emission bands of the CaF diatomic molecule in the fluorite samples exhibited stronger optical emission compared to the fluorine atomic lines. Chemical composition analysis using CF-LIBS was in good agreement with results from the EDX technique. The validity of the CF-LIBS results was confirmed using the calibration curve method, and a principal component analysis (PCA) technique was utilized to classify the fluorite samples.
RESULTS IN PHYSICS
(2023)
Article
Chemistry, Analytical
Wei Wang, Lanxiang Sun, Peng Zhang, Liming Zheng, Lifeng Qi
Summary: The study investigated the reduction of self-absorption in the spectrum using double-pulse laser-induced breakdown spectroscopy, finding that the gas environment generated by the first laser beam affects the self-absorption effect of the plasma spectrum. It was observed that the spectral self-absorption effect is weakest at specific double-pulse delays for different elements, and that the double-pulse delay and the first laser beam energy have a strong correlation with the self-absorption effect.
MICROCHEMICAL JOURNAL
(2022)
Article
Optics
A. U. Haq, M. Abrar, T. Iqbal, M. N. Khan, M. Shafique
Summary: In this study, Laser-Induced Breakdown Spectroscopy (LIBS) was used for qualitative and quantitative analysis of Chitosan samples. The plasma parameters and the initial concentration of chitosan samples were determined for qualitative and quantitative analysis respectively. The results showed that LIBS can be used for quantitative and standard analysis of industrial grade materials for better results in applications.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Yang-Ting Fu, Wei-Lun Gu, Zong-Yu Hou, Sher Afgan Muhammed, Tian-Qi Li, Yun Wang, Zhe Wang
Summary: This study used fast-imaging cameras to capture the evolution process of laser-induced plasma, revealing the reasons for plasma morphology fluctuation. With increasing delay time, the plasma morphology fluctuation increased, potentially leading to LIBS measurement uncertainty.
FRONTIERS OF PHYSICS
(2021)
Article
Engineering, Chemical
Noel Gomez, Alejandro Molina
CHEMICAL ENGINEERING & TECHNOLOGY
(2019)
Article
Materials Science, Multidisciplinary
Yeqing Wang, David W. Hahn
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2019)
Article
Instruments & Instrumentation
Daniel Diaz, Alejandro Molina, David W. Hahn
APPLIED SPECTROSCOPY
(2020)
Article
Spectroscopy
Daniel Diaz, David W. Hahn
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2020)
Article
Spectroscopy
Daniel Diaz, David W. Hahn
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2020)
Article
Spectroscopy
Daniel Diaz, David W. Hahn
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2020)
Article
Spectroscopy
Daniel Diaz, David W. Hahn
Summary: The study evaluated and verified the application of Conditional Analysis in aerosol sampling, and successfully reduced relative errors through a modified version of the method. Experimental results showed that this method can accurately determine the calcium content in aerosols, providing important reference for further research.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2021)
Article
Instruments & Instrumentation
Daniel Diaz, David W. Hahn
Summary: LIBS was used to characterize the ejecta released by Li-ion cells during thermal runaway, with high-intensity atomic emissions of C, F, H, Li, Na, and P detected during heating experiments, indicating the presence of solid-phase analytes or analyte-bearing particles.
APPLIED SPECTROSCOPY
(2022)
Article
Energy & Fuels
Juan Felipe Hincapie, Sebastian Lopez, Alejandro Molina
Summary: A simulation tool has been developed to analyze chemical reaction schemes in in-situ combustion processes. This tool models various experimental setups based on conservation laws, physical correlations, and property databases. It includes three modules to represent processes in laboratory-scale equipment and supports the calculation of chemical kinetic parameters. The tool can be used to analyze gas phase reactions, axial gradients, pressure build-up, and ignition in the combustion process. These examples highlight the importance of homogeneous reactions and concentration gradients in interpreting experimental results.
CT&F-CIENCIA TECNOLOGIA Y FUTURO
(2022)
Article
Energy & Fuels
Kelvin Randhir, Keith King, Nathan Rhodes, Like Li, David Hahn, Renwei Mei, Nicholas AuYeung, James Klausner
JOURNAL OF ENERGY STORAGE
(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)