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
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
Chemistry, Physical
Odhisea Gazeli, Dimitrios Stefas, Stelios Couris
Summary: Laser-induced breakdown spectroscopy (LIBS) is effectively used for rapid sulfur detection in organic soil samples with the assistance of multivariate analysis methods, demonstrating its applicability and efficiency through the construction of calibration curves and analysis of various statistical models.
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
Physics, Multidisciplinary
Wojciech Gromelski, Pawel Gasior
Summary: The time evolution of plasma electron temperature and density is crucial in various physics-related fields. The CF DP-LIBS method can minimize sample impact, optimize laser and spectral parameters, and enable real-time chemical analysis. By calculating electron temperature and density of plasma induced by double-pulse Nd:YAG laser with different inter-pulse delays, researchers can provide complementary calculations using methods like Stark broadening, Boltzmann plot, and Saha equation. The study focuses on tungsten samples, as tungsten is the preferred material for plasma-facing components in future fusion devices like ITER, where LIBS method will be used to monitor tritium retention.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
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
Optics
Yuji Ikeda, Joey kim Soriano, Hironori Ohba, Ikuo Wakaida
Summary: Using microlasers and microwaves, this study investigated the impact of microwaves on the expansion of air plasma. The results showed that microwave enhancement led to a 400-fold increase in plasma volume, along with an increase in temperature and a decrease in electron density, indicating the presence of nonequilibrium plasmas. Additionally, microwaves were found to sustain plasma characteristics over time.
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
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
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
Optics
Farzaneh Ghazi-Maghrebi, Hamidreza Shirvani-Mahdavi, Seyede Zahra Shoursheini
Summary: This paper demonstrates the analysis of blood cholesterol using calibration curves derived from LIBS and FTIR techniques. By measuring the plasma emission spectrum and FTIR spectrum of the samples, calibration curves related to cholesterol concentration are obtained, which can be used to determine the target cholesterol concentration.
Article
Environmental Sciences
Hang Vo-Minh Nguyen, Jung Hyun Choi
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2015)
Article
Environmental Sciences
Eun-Ah Kim, Hang Vo-Minh Nguyen, Hae Sung Oh, Jin Hur, Jung Hyun Choi
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2016)
Article
Engineering, Environmental
In-Young Choi, Hang Vo-Minh Nguyen, Jung Hyun Choi
ENVIRONMENTAL ENGINEERING RESEARCH
(2017)
Article
Environmental Sciences
Hang Vo-Minh Nguyen, Jin Hur
Article
Environmental Sciences
Hang Vo-Minh Nguyen, Jae-Ki Shin, Jin Hur
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2011)
Article
Environmental Sciences
Jin Hur, Hang Vo-Minh Nguyen, Bo-Mi Lee
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2014)
Article
Engineering, Civil
Hang Vo-Minh Nguyen, Mi-Hee Lee, Jin Hur, Mark A. Schlautman
JOURNAL OF HYDROLOGY
(2013)
Article
Chemistry, Multidisciplinary
Hang Vo-Minh Nguyen, Jong Kuk Kim, Soon Woong Chang
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2019)
Article
Environmental Sciences
Hang Vo-Minh Nguyen, Jin Hur, Hyun-Sang Shin
WATER AIR AND SOIL POLLUTION
(2010)
Article
Environmental Sciences
Hang Vo-Minh Nguyen, Han-Saem Lee, Su-Young Lee, Jin Hur, Hyun-Sang Shin
Summary: The effects of chlorination on humic and fulvic acids from different soil samples were studied, revealing critical differences in structural changes and disinfection by-product formation. Factors such as TOC, fluorescence, and PCA analysis linked specific structural characteristics with THMFP generation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Hang V-Minh Nguyen, Doo-Hee Lee, Han-Saem Lee, Hyun-Sang Shin
Summary: Sediment humins play a crucial role in binding hydrophobic organic contaminants in rivers and lakes. The structure and sorption affinity of sediment humins from two artificial lakes in South Korea were examined, and compared with other humic substances. The findings provide important insights for monitoring water quality and polycyclic aromatic hydrocarbon contamination in South Korean lake sediments.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Hansaem Lee, Seonyoung Park, Hang V-Minh Nguyen, Hyun-Sang Shin
Summary: This study assessed eight parameters of water quality using a random forest approach and derived parameter weights based on spatiotemporal datasets. A customized Water Quality Index (WQI) representing water quality characteristics was calculated using these data-based weights, which is expected to better match the previous WQI to the purpose and target source.
ENVIRONMENTAL POLLUTION
(2023)