Review
Geochemistry & Geophysics
Russell S. Harmon, Giorgio S. Senesi
Summary: Laser-induced breakdown spectroscopy (LIBS) is a versatile atomic emission spectroscopy technique that allows for elemental analysis in a variety of environments and has vast potential for applications in the geosciences.
APPLIED GEOCHEMISTRY
(2021)
Article
Spectroscopy
Sungho Shin, Xi Wu, Valery Patsekin, Iyll-Joon Doh, Euiwon Bae, J. Paul Robinson, Bartek Rajwa
Summary: Laser-induced breakdown spectroscopy (LIBS) is a widely used elemental analysis method with rapid measurement capability and minimal sample preparation requirements. Recently, there has been growing interest in applying LIBS to food safety and quality, particularly in identifying predictive spectral patterns through multivariate analysis.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Environmental Sciences
Haifeng Ding, Linhai Jing, Mingjie Xi, Shi Bai, Chunyan Yao, Lu Li
Summary: This study presents a method of fusing remote sensing images with small-scale geochemical data to improve the resolution of geochemical elemental layers, providing reference data for mineral exploration in areas lacking large-scale geochemical data.
Article
Materials Science, Ceramics
Rohit Pratyush Behera, Syafiq Bin Senin Muhammad, Marcus He Jiaxuan, Hortense Le Ferrand
Summary: By using ultra-low magnetic fields combined with slip casting, it is possible to purposely orient magnetically responsive particles in any direction in ceramics. The textured ceramics obtained from bimodal slurries containing alumina nanoparticles and alumina microplatelets of various dimensions show anisotropic grains with controllable orientations, grain length of 3-7 μm, mild open porosity between 30-40%, and interesting cracking behavior, making them promising for filtering, biomedical, or composite applications.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Coatings & Films
Yong Hu, Liang Wang, Zhijun Chen, Qunli Zhang, Rong Liu, Jianhua Yao
Summary: The influence of a single steady magnetic field (SMF) and an electromagnetic compound field with downward Lorentz force (EDLF) on dendritic growth during laser cladding process was investigated. The results showed that both SMF and EDLF can cause grain coarsening, with EDLF having a greater effect. The application of EDLF resulted in suppressed molten pool velocity, flat solidification interface, decreased dendrite nucleation rate, improved heat flux stability, and coarser grain size in the cladding layer.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Russell S. Harmon, Daria Khashchevskaya, Michelle Morency, Lewis A. Owen, Morgan Jennings, Jeffrey R. Knott, Jason M. Dortch
Summary: The innovative use of handheld LIBS for in situ analysis of rock varnish has successfully identified emission peaks for the nine elements most abundant in the veneer. This research helps to better understand rock varnish formation and its potential utility for weathering and chronological studies.
Article
Nanoscience & Nanotechnology
Y. Q. Chang, L. W. Kong, X. L. Zhu, X. F. Zhu, J. Cao, B. Wen, P. Li
Summary: Due to the size effect, the material exhibits stronger characteristics as it becomes smaller, but there are limitations to the improvement of material strength. In this study, a pure copper fiber with a diameter of 200 μm is reduced to 23 μm using the cold drawing method. The results of stress-strain curve analysis and microscopic analysis indicate that grain boundary strengthening, texture strengthening, and dislocation strengthening are the main methods of strengthening the copper fiber. Cold drawing improves the fiber strength by reducing grain size and changing texture orientations.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Urvashi Jambukiya, Mayur Parmar, Neeta A. Bhammar, K. N. Rathod, Debashish Sarkar, M. R. Gonal, Davit Dhruv, P. S. Solanki, D. D. Pandya, N. A. Shah, A. D. Joshi
Summary: In this research, manganite metal oxide nano-micro composites were successfully synthesized and characterized. The structural aspects, morphology, elemental composition, electrical properties and magnetic properties of the composites were investigated. The study provides valuable insights into the properties of the materials and proposes theoretical models and mechanisms to explain the observed phenomena.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
Cesar Marina-Montes, Vincent Motto-Ros, Luis Vicente Perez-Arribas, Jesus Anzano, Maria Millan-Martinez, Jorge O. Caceres
Summary: The article presents an innovative method based on micro laser-induced breakdown spectroscopy for characterizing PM collected in Antarctica, which can quickly obtain a global visualization of elemental PM composition under atmospheric pressure. This method can map the localization of pollutants in filters at high spatial resolution and speed.
ANALYTICA CHIMICA ACTA
(2021)
Article
Materials Science, Multidisciplinary
Dusan Milosavljevic, Paola Bassani, Simone Cinquemani, Nora Lecis
Summary: In this paper, the effects of thermomechanical treatments on the Shape Memory Effect (SME) and damping performance of Cu-Al-Mn Shape Memory Alloys (SMA) are explored. The potential application of SMA sheets for designing lightweight structures with high damping performance is investigated. The casting and thermomechanical treatment process are described, and the material is characterized through optical microscopy, SEM with EDX analysis, and DSC. The alloy exhibits workability for sheet fabrication, but is sensitive to oxidation due to impurities and the hot-rolling process. However, the alloy shows competitive damping performance compared to commercially available NiTi SMA.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Ceramics
Yuki Nakashima, You Zhou, Keisuke Tanabe, Souhei Arima, Kiyoshi Hirao, Tatsuki Ohji, Norimitsu Murayama, Manabu Fukushima
Summary: Silicon nitride ceramics were prepared using a sintered reaction-bonded method, and the microstructure and dielectric breakdown strength of the ceramics were evaluated. The study found a correlation between the thickness of the ceramics and their dielectric breakdown strength.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Coatings & Films
Taro Omura, Chun-Yi Chen, Tso-Fu Mark Chang, Daisuke Yamane, Hiroyuki Ito, Katsuyuki Machida, Kazuya Masu, Masato Sone
Summary: In this study, the effects of current density on the micro-mechanical properties of electrodeposited gold were evaluated using micro compression tests. The results showed that the current density had a significant impact on the grain size and yield strength of the gold films.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Dong-Mei Chen, Zhen-Zhen An, Guo-Dong Wang, Hai-Tao Liu
Summary: This study investigates the effects of different hot rolling and coiling temperatures on the microstructural and textural evolution of low silicon steel, finding that under certain conditions, grain growth can be significantly promoted, leading to improved magnetic properties. This provides a promising method for designing the hot rolling process to coarsen grains.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Geochemistry & Geophysics
Jeannet A. Meima, Dieter Rammlmair, Malte Junge
Summary: A new method using scanning Laser Induced Breakdown Spectroscopy (LIBS) was developed to analyze cryptic variations in mineral chemistry. This fast and easy-to-use method is particularly useful for comparing the lateral variability of important diagnostic horizons such as Merensky Reef and UG-2.
Article
Geochemistry & Geophysics
Renguang Zuo, Jian Wang, Bojun Yin
Summary: Geochemical exploration provides important clues for mineral exploration, but interpreting and visualizing data remains challenging. A workflow for intelligent interpretation and visualization of geochemical exploration data supported by GIS and machine learning algorithms was proposed, demonstrated to be effective in a case study in Sichuan Province, China. Future research should incorporate advanced mathematical and statistical models, such as deep learning algorithms, into GIS to further support intelligent interpretation and visualization of geochemical exploration data.
APPLIED GEOCHEMISTRY
(2021)
Article
Geochemistry & Geophysics
Cassady L. Harraden, Matthew J. Cracknell, James Lett, Ron F. Berry, Ronell Carey, Anthony C. Harris
Article
Geosciences, Multidisciplinary
Russell S. Harmon, Deborah L. Leslie, W. Berry Lyons, Kathleen A. Welch, Diane M. McKnight
Summary: The McMurdo Dry Valley region in Antarctica is characterized by the flow of ephemeral streams during the summer season, transporting meltwater to ice-covered lakes. Analyzing the chemistry of streams in Taylor Valley over a 20-year period revealed dominant solute budgets and consistent anionic geochemical fingerprints, with variations in cation compositions. Two representative streams, Andersen Creek and Von Guerard, demonstrated varying physical and biological characteristics, with strong daily cycles in solute load, temperature, dissolved oxygen, and pH. Von Guerard exhibited chemostatic regulation over the summer flow season, indicating prolonged water-sediment interaction and silicate mineral dissolution.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2021)
Article
Chemistry, Multidisciplinary
Richard R. Hark, Chandra S. Throckmorton, Russell S. Harmon, John R. Plumer, Karen A. Harmon, J. Bruce Harrison, Jan M. H. Hendrickx, Jay L. Clausen
APPLIED SCIENCES-BASEL
(2020)
Review
Geochemistry & Geophysics
Russell S. Harmon, Giorgio S. Senesi
Summary: Laser-induced breakdown spectroscopy (LIBS) is a versatile atomic emission spectroscopy technique that allows for elemental analysis in a variety of environments and has vast potential for applications in the geosciences.
APPLIED GEOCHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Russell S. Harmon, Daria Khashchevskaya, Michelle Morency, Lewis A. Owen, Morgan Jennings, Jeffrey R. Knott, Jason M. Dortch
Summary: The innovative use of handheld LIBS for in situ analysis of rock varnish has successfully identified emission peaks for the nine elements most abundant in the veneer. This research helps to better understand rock varnish formation and its potential utility for weathering and chronological studies.
Article
Geochemistry & Geophysics
Peter A. Defnet, Michael A. Wise, Russell S. Harmon, Richard R. Hark, Keith Hilferding
Summary: Laser-induced breakdown spectroscopy (LIBS) is a powerful tool for rapid and accurate identification of garnet types, as well as for detecting changes in garnet composition associated with different pegmatite types.
Article
Geochemistry & Geophysics
Michael A. Wise, Russell S. Harmon, Adam Curry, Morgan Jennings, Zach Grimac, Daria Khashchevskaya
Summary: Laser-induced breakdown spectroscopy (LIBS) is an ideal tool for Li exploration as it is the only technique capable of in-situ measurement of Li in minerals, rocks, soils, and brines in the field. This study focuses on the LCT pegmatites of the Carolina Tin-Spodumene Belt (CTSB) and demonstrates the potential of handheld LIBS for real-time Li analysis in four contexts: elemental detection, microchemical mapping, depth profiling, and elemental quantitative analysis.
Review
Geochemistry & Geophysics
Jochen Hoefs, Russell Harmon
Summary: This review summarizes the stable isotope composition of gases and aerosols in the Earth's atmosphere, as well as recent technical advancements in analytical methodologies. These methods provide new insights into atmospheric processes and enable the differentiation of atmospheric constituents from natural and anthropogenic sources. Ice core analysis reveals that the isotope composition of the atmosphere has continuously changed due to past climate cycles and recent human activities.
APPLIED GEOCHEMISTRY
(2022)
Article
Geochemistry & Geophysics
Russell S. Harmon, Michael A. Wise, Adam C. Curry, Joshua S. Mistele, Michael S. Mason, Zach Grimac
Summary: Laser-induced breakdown spectroscopy (LIBS) is an effective technology for compositional analysis, especially for lightweight elements like lithium. This study used handheld LIBS to analyze muscovite samples from the Carolina Lithium Prospect in North Carolina, USA, and found varying abundances of alkali elements and highly evolved character of pegmatites within the Carolina Tin-Spodumene Belt (CTSB). The study highlights the use of LIBS analysis of muscovite as a tool for on-site geochemical analysis during lithium pegmatite exploration.
Proceedings Paper
Geology
Cassady L. Harraden, Sebastien Meffre, Ron Berry
MINERAL RESOURCES TO DISCOVER, VOLS 1-4
(2017)