Article
Physics, Multidisciplinary
Zhiguo An, Yongqi He, Qijuan Chen, Gang Du, Xilin Wang
Summary: This study investigated the relationship between spectral signals and temperatures of silicone rubber using LIBS analysis. The results showed that the intensity of certain spectral lines and the properties of plasma and electron density varied with temperature. A spike was observed at approximately 260 degrees C due to the decomposition of aluminum hydroxide. These findings are important for improving the accuracy of LIBS analysis in monitoring silicone rubber surfaces in high-temperature environments.
FRONTIERS IN PHYSICS
(2023)
Article
Optics
Yunping Wang, Qiuyun Wang, Anmin Chen, Mingxing Jin
Summary: This study investigated the influence of pre-heating the target on laser-induced breakdown spectroscopy (LIBS) emission intensity by using different temperatures of copper targets. The results showed that higher target temperatures led to stronger spectral signals, which was also supported by observations of ablation crater morphology and simulations of thermal behavior.
Article
Physics, Multidisciplinary
Yitong Liu, Qiuyun Wang, Luyun Jiang, Anmin Chen, Jianhui Han, Mingxing Jin
Summary: Laser-induced breakdown spectroscopy (LIBS) is a technique that utilizes plasma emission to detect and analyze material elements. This study investigates the impact of laser-polarization on femtosecond laser-ablated Cu plasma spectra, and finds that circularly polarized lasers result in higher measured lines compared to linearly and elliptically polarized lasers. By adjusting the laser-polarization and raising the Cu temperature, the signal of femtosecond LIBS can be improved.
Article
Spectroscopy
A. Robledo-Martinez, A. Garcia-Villarreal, H. Sobral, O. H. Magos
Summary: In this study, a cost-effective and energy-efficient technique for improving the sensitivity of laser-induced breakdown spectroscopy was developed. This method involves using a continuous wave diode laser to heat the sample's surface while a pulsed Nd:YAG laser induces plasma. It was discovered that pre-heating the sample resulted in a significant increase in the line intensity of neutrals and ions, but the plasma excitation temperature and electron density did not change significantly. However, the amount of ablated material did increase, resulting in a larger plume size when the target was heated.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
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)
Article
Chemistry, Analytical
Yuzhou Song, Weiran Song, Xiang Yu, Muhammad Sher Afgan, Jiacen Liu, Weilun Gu, Zongyu Hou, Zhe Wang, Zheng Li, Gangyao Yan, Qing Ye, Zijun Liu, Hongqi Zheng, Junsheng Fan, Yuchun Yu, Liang Li
Summary: The study introduced a new method to increase spectral differences between similar samples by using multiple setting spectra, leading to improved accuracy in sample discrimination in LIBS measurement. The effectiveness of the proposed method was theoretically verified and demonstrated through experimental tests, showing a significant increase in sample discrimination accuracy.
ANALYTICA CHIMICA ACTA
(2021)
Article
Physics, Fluids & Plasmas
Miao LIU, Anmin CHEN, Yutong CHEN, Xiangyu ZENG, Qiuyun WANG, Dan ZHANG, Dapeng YANG, Mingxing JIN
Summary: The study found that the emission spectra and plasma temperatures produced by femtosecond and nanosecond laser ablations showed similar trends at different target temperatures, with both parameters improving by increasing the sample temperature. The plasma temperature generated by nanosecond laser was higher, with a more significant increase in plasma temperature observed at different sample temperatures. There was a notable difference in electron density between femtosecond and nanosecond laser-induced plasmas.
PLASMA SCIENCE & TECHNOLOGY
(2021)
Article
Optics
Liping Tian, Lingbin Shen, Dongpeng Tian, Yifan Ge, Zhongmou Sun, Yuzhu Liu
Summary: A new system based on laser induced breakdown spectroscopy (LIBS) and machine learning algorithms is developed for identifying and classifying e-waste of rare-earth phosphors (REPs), which is of great significance for recycling rare earth elements (REs). The spectra analysis shows the presence of Gd, Yd, and Y RE element spectra in the phosphors and verifies the applicability of LIBS in detecting RE elements. By using principal component analysis (PCA) and backpropagation artificial neural network (BP-ANN) algorithm for training and identification, the final phosphor recognition rate reaches 99.9%. This innovative system has the potential to improve the rapid in situ detection of RE elements for e-waste classification.
Article
Optics
Jiang Xu, Xiao Wang, Mingyin Yao, Muhua Liu
Summary: This study establishes a detection model of polarization recognition rate by exploring the intensity formula of discrete spectral data, and investigates the polarization characteristics of plasma and the improvement mechanism of recognition rate under low energy density. The results show that increasing laser energy improves the recognition of characteristic spectral lines, and heavy-metal elements have a higher polarization recognition rate under low energy density.
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, Multidisciplinary
Bin Tai, Xiaojian Hao, Jia Wang, Haoliang Sun
Summary: Calibration experiments using the spectral emissivity of intrinsic element particles were conducted to achieve accurate measurement of a temperature field, verifying the experiment's accuracy.
Article
Engineering, Environmental
Shixiang Ma, Fengjing Cao, Xuelin Wen, Fanghao Xu, Hongwu Tian, Xinglan Fu, Daming Dong
Summary: The rapid and sensitive detection of heavy metal ions is crucial for environmental and human health. This study introduces a method utilizing laser-induced breakdown spectroscopy (LIBS) combined with filter paper modified with PtAg bimetallic nanoparticles (BNPs) for simultaneous and ultrasensitive detection of Hg2+, Cr3+, and Pb2+. The method shows highly efficient enrichment, rapid separation, and sensitive detection of heavy metal ions, making it a promising approach for detecting trace heavy metals in the environment.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
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
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
Biochemistry & Molecular Biology
Marcela Vlcnovska, Aneta Stossova, Michaela Kuchynka, Veronika Dillingerova, Hana Polanska, Michal Masarik, Roman Hrstka, Vojtech Adam, Viktor Kanicky, Tomas Vaculovic, Marketa Vaculovicova
Summary: Immunochemical methods are widely used in clinical practice and research to diagnose diseases and recognize target molecules in biological samples. The combination of elemental labels with antibodies enables detection of multiple antigens simultaneously using ICP-MS and monitoring of spatial distribution with LA-ICP-MS. Metal nanoparticle-labeled antibodies extend the application to molecular imaging by LA-ICP-MS.
Article
Chemistry, Applied
Lukas Nejdl, Martina Havlikova, Filip Mravec, Tomas Vaculovic, Veronika Faltusova, Kristyna Pavelicova, Mojmir Baron, Michal Kumsta, Vit Ondrousek, Vojtech Adam, Marketa Vaculovicova
Summary: The method presented uses the fluorescence characteristics of samples after UV treatment for analysis, suitable for a variety of samples including pharmaceuticals and beverages, without requiring additional chemical reagents, only suitable diluent. By observing the changes in fluorescence, different samples can be quickly identified.
Article
Archaeology
Eva Cerna, Zuzana Zlamalova Cilova, Tomas Vaculovic, Veronika Faltusova
Summary: The study presents the latest knowledge of glass production in the High Middle Ages in the Ore Mountains, focusing on archaeological sources from excavations at three glassworks sites. The research includes detailed typological-morphological and archaeometric analysis to refine the understanding of glass production technology in the 13th century.
ARCHEOLOGICKE ROZHLEDY
(2021)
Article
Archaeology
Katerina Tomkova, Natalie Venclova, Sarka Krizova, Tomas Vaculovic, Veronika Faltusova
Summary: The Migration period cemetery in Zaluzi by Celakovice, investigated in the 1920s and 1930s, is one of the largest and most important sites in Bohemia from the end of the 5th to the middle of the 6th century AD. The glass assemblage found at the site, including 168 beads, provides valuable insights into recycling practices during the first millennium AD.
ARCHEOLOGICKE ROZHLEDY
(2021)
Article
Biochemistry & Molecular Biology
Lucie Vanickova, Tomas Do, Marketa Vejvodova, Vratislav Horak, Martin Hubalek, Gabriella Emri, Kristyna Zemankova, Kristyna Pavelicova, Sona Krizkova, Veronika Faltusova, Antonio Pompeiano, Marketa Vaculovicova, Ondrej Zitka, Tomas Vaculovic, Vojtech Adam
Summary: In this study, a powerful tool for comprehensive data collection and mapping of molecular and elemental signatures in the Melanoma-bearing Libechov Minipig (MeLiM) model was developed. Different mass spectrometric methods were used to investigate specific melanoma markers and elements and their spatial distribution in tissue sections. The combination of MALDI-MSI and HPLC-MS/MS analyses led to the identification of seven specific proteins present in melanoma signatures. Additionally, the ICP-MS method allowed for spatial detection of certain elements linked with specific binding proteins.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Engineering, Environmental
Klemens Kremser, Melanie Maltschnig, Herta Schoen, Aleksander Jandric, Martin Gajdosik, Tomas Vaculovic, Jiri Kucera, Georg M. Guebitz
Summary: The study explored the optimized process of producing biogenic sulfuric acid by combining two sulfur-oxidizing bacteria, and applying it for pH control in the metal extraction process from waste leaching. The experiment successfully recovered various metals in a heap bioleaching system.
Article
Engineering, Chemical
Klemens Kremser, Sophie Thallner, Sabine Spiess, Jiri Kucera, Tomas Vaculovic, Dalibor Vsiansky, Marianne Haberbauer, Georg M. Guebitz
Summary: Decreasing ore grades and increasing metal consumption have caused a shortage of primary raw materials, making the urban mining of different deposits and anthropogenic stocks increasingly important. This study investigates the biological extraction of metals from basic oxygen furnace (BOF) slag using sulfur-oxidizing and iron- and sulfur-oxidizing bacteria. The results show high extraction efficiencies and selective precipitation, highlighting the potential of BOF slag as an artificial ore for urban mining and demonstrating the effectiveness of combining bioleaching and selective precipitation for sustainable metal recovery.
Correction
Nanoscience & Nanotechnology
Simona Dostalova, Tereza Cerna, David Hynek, Zuzana Koudelkova, Tomas Vaculovic, Pavel Kopel, Jan Hrabeta, Zbynek Heger, Marketa Vaculovicova, Tomas Eckschlager, Marie Stiborova, Vojtech Adam
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Spectroscopy
Ales Hrdlicka, Jitka Hegrova, Martina Buckova, David Prochazka, Marketa Hola, Karel Novotny, Pavel Porizka, Viktor Kanicky, Jozef Kaiser
Summary: The contamination of algae with chromium and copper on a filter can be directly monitored using LIBS, which provides comparable sensitivity and almost equivalent information to ICP-MS. The trend obtained from LIBS analysis was more similar to that of LA-ICP-MS, indicating that LIBS can be an alternative method to monitor the inhibition of algae growth caused by chromium or copper without the need for the complicated decomposition procedure in ICP-MS analysis.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2022)
Article
Anthropology
Katerina Tomkova, Sarka Krizova, Veronika Faltusova, Nadine Schibille, Tomas Vaculovic
Summary: The distribution of olive and fusiform beads in Bohemia, Moravia, Bavaria and its surrounding areas in the eighth-tenth centuries suggests local glass-working in central Europe. Different regional preferences, typological details, and asynchronous occurrence point to production in multiple workshops. Analysis of bead samples shows that most were made from recycled soda-lime-silica natron glass, with some exceptions made from Islamic plant ash and western European wood ash glass.
ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES
(2023)
Article
Geochemistry & Geophysics
Peter Bacik, Jana Fridrichova, Olena Rybnikova, Jan Stubna, Ludmila Illasova, Radek Skoda, Tomas Vaculovic, Zuzana Pulisova, Peter Seckar
Summary: A complex crystal-chemical investigation, using spectroscopic methods, EMPA, and LA-ICP-MS, was conducted on sphalerite samples from the Banska Stiavnica ore district. Different colors of sphalerite have different associated minerals, and Cd and Fe substitute for Zn with variable proportions. Mn, Co, and Cu are also present in significant amounts. The optical absorption spectra reveal absorption peaks attributed to crystal-field transitions of Fe2+, and the colors of sphalerite are determined by the absorption patterns.
Article
Engineering, Biomedical
Hana Stepankova, Hana Michalkova, Zbynek Splichal, Lukas Richtera, Pavel Svec, Tomas Vaculovic, Jan Pribyl, Martin Kormunda, Simona Rex, Vojtech Adam, Zbynek Heger
Summary: Although the general concept of nanotechnology relies on exploiting the size-dependent properties of nanoscaled materials, the relationship between the size/morphology of nanoparticles and their biological activity is still not well understood. In this study, we investigated the biological activity of Se nanoparticles with different morphologies (nanorods vs. spherical particles) and aspect ratios (AR) in human cells and mice. Our findings suggest that the aspect ratio is a critical factor for the cytotoxicity and biocompatibility of nanorod-shaped Se nanomaterials.
BIOACTIVE MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Michaela Kuchynka, Hana Holcova Polanska, Jaromir Gumulec, Viktor Kanicky, Tomas Vaculovic
Summary: A new experiment involving LA-ICP-MS was designed for chemistry undergraduate students, providing them with information on the amount and distribution of elements in a sample. Using a thin section of mouse tissue as a model sample, the students determined the distribution and quantity of essential elements Zn, Cu, and Pt.
JOURNAL OF CHEMICAL EDUCATION
(2023)
Article
Chemistry, Analytical
Veronika Faltusova, Tomas Vaculovic, Marketa Hola, Viktor Kanicky
Summary: In this study, a python software called Ilaps is presented for easy processing of LA-ICP-MS data, allowing for bulk analysis and imaging. The software does not require data preparation and offers automatic signal selection and manual contamination exclusion. The study showcases the potential of Ilaps in the fields of archaeology and imaging.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2022)
