Article
Chemistry, Physical
Hayoung Kim, ShinYoung Kang, Ji Yeong Lee, Tae Wook Heo, Brandon C. Wood, Jae-Hyeok Shim, Young Whan Cho, Do Hyang Kim, Jin-Yoo Suh, Young -Su Lee
Summary: This study evaluates the effect of alloying elements on the initial hydrogenation kinetics of TiFe alloys through analyzing the changes in TiFe0.9M0.1 (M = V, Cr, Fe, Co, and Ni) alloys. The results reveal suppressed oxide growth and reduced nucleation barrier in alloyed TiFe, leading to improved activation kinetics. These findings provide a starting point for alloy design strategies towards further improvement.
APPLIED SURFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
K. Gururaj, Mainak Saha, Sumit Kumar Maurya, Rajat Nama, A. Alankar, M. B. Ponnuchamy, K. G. Pradeep
Summary: The formation of nano-twinned domains associated with ferro-elastic transformation in 2 mol.% ZrO2 alloyed YTaO4 has been investigated through correlative microscopy approach. Experimental results reveal the presence of monoclinic and tetragonal phases, with the microstructure consisting of alternating nano-twinned domains. Crystallographic analyses support the observation of a single domain state. Abinitio calculations further show that both M and T phases can be stabilized at room temperature through ZrO2 alloying, without any change in chemical composition.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
Yamin Song, Xuexing Lin, Shaofen Yu, Yuxiang Bu, Xinyu Song
Summary: This study uncovers the dynamic nature of magnetic coupling induced by hydrogen migration in the nitrogen-vacancy center of nanodiamonds, and reveals that hydrogen-migration enables nanodiamonds to exhibit rich dynamic magnetic coupling characteristics.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Daniel S. Mosiman, Yi-Sheng Chen, Limei Yang, Brian Hawkett, Simon P. Ringer, Benito J. Marinas, Julie M. Cairney
Summary: Two techniques were developed to encapsulate and prepare HAP NPs into APT tips for characterization, revealing significant tradeoffs between encapsulant methods/materials for HAP characterization and the need for further technique development to select a more robust approach. This work serves as an essential starting point for advancing knowledge about the nanoscale spatiochemistry of HAP NPs.
Article
Chemistry, Multidisciplinary
Mathias Kraemer, Bar Favelukis, Ayman A. El-Zoka, Maxim Sokol, Brian A. Rosen, Noam Eliaz, Se-Ho Kim, Baptiste Gault
Summary: A study reveals the presence of alkali and halogen elements, as well as unetched aluminum in MXenes materials, which are often overlooked when considering the activity and performance.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Andrey A. Shiryaev, Alexander L. Trigub, Ekaterina N. Voronina, Kristina O. Kvashnina, Valentin L. Bukhovets
Summary: The study reveals that noble gases in thin graphene stacks distort the layers forming bulges, while X-ray absorption spectroscopy supports Xe-vacancy (Xe-V) defects as the main sites for Xe in nanodiamonds.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Yu Xia, Jiaming Liu, Xingchu Zhang, Renlong Zhou
Summary: Research findings show that laser energy absorption and field evaporation mechanisms can be described by an effective cross section, while the fluctuation of charge state is influenced by collective excitation of electrons. The average charge state is only dependent on the static field strength.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Optics
Adam Filipkowski, Mariusz Mrozek, Grzegorz Stepniewski, Maciej Glowacki, Dariusz Pysz, Wojciech Gawlik, Ryszard Buczynski, Mariusz Klimczak, Adam Wojciechowski
Summary: Efficient collection of photoluminescence from spin dynamics of nitrogen vacancy (NV) centers in diamond is achieved by integrating nanodiamond particles into a suspended core silicate glass fiber probe. The developed probe demonstrates improved magnetic field sensitivity and could be used for magnetic field mapping and measurement.
Article
Nanoscience & Nanotechnology
Qing Tan, Zhiran Yan, Huijun Wang, David Dye, Stoichko Antonov, Baptiste Gault
Summary: The addition of trace Fe significantly affects the corrosion potential of commercially pure titanium, leading to the appearance of submicron beta phase pockets. Titanium alloys are prone to hydride-associated failures due to the low solubility of hydrogen in α-Ti.
SCRIPTA MATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
S. A. Mantri, S. Dasari, A. Sharma, Y. Zheng, H. L. Fraser, R. Banerjee
Summary: The formation and influence of isothermal phase precipitates in a metastable beta-titanium alloy, Ti-10V-2Fe-3Al, is investigated. It is found that the rejection of Al from the growing isothermal precipitates aids in their formation. The presence of alpha/omega and alpha/beta interfaces confirms that the alpha precipitates form at the beta/omega interface. Subsequent annealing at a higher temperature dissolves the precipitates and re-establishes the two-phase beta+alpha equilibrium.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
P. Maugis, M. Jouiad, F. Roch, C. Perrin-Pellegrino, K. Hoummada
Summary: Experimental and modeling studies on carbon and nitrogen segregation to dislocations in C-Mn ferritic steels were reported. A model based on McLean theory was established to describe the competitive segregation of carbon and nitrogen in the Cottrell atmospheres around dislocations, taking into account the effect of dislocation density. It was found that the plastic strain during tensile test can modify the material properties by changing the nature and quantity of segregated atoms around dislocations, leading to a preferential segregation of nitrogen over carbon.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Geochemistry & Geophysics
Cilva Joseph, Denis Fougerouse, David W. Saxey, Rick Verberne, Steven M. Reddy, William D. A. Rickard
Summary: A novel methodology using atom probe tomography has been developed to determine the ages of micro-scale xenotime crystals, offering potential for exploring geological problems at the nanoscale level.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Martin Detrois, Zongrui Pei, Tao Liu, Jonathan D. Poplawsky, Michael C. Gao, Paul D. Jablonski, Jeffrey A. Hawk
Summary: The study found that silicon has a negative impact on the improvement of creep properties in Ni-based superalloys when using B, as silicon decreases the grain boundary cohesion, offsetting the effects of B segregation.
SCRIPTA MATERIALIA
(2021)
Article
Microscopy
Alec C. Day, Andrew J. Breen, Simon P. Ringer
Summary: Spatially accurate atom probe tomography reconstructions are essential for quantitative spatial measurements in nanostructural analysis. Crystallographic information within the atom probe data can be used to calibrate tomographic reconstruction, but traditional methods are error-prone and time-consuming. A new approach proposed in this study simplifies the process and is applicable to a wider range of atom probe situations.
Article
Geochemistry & Geophysics
M. J. Turuani, A. T. Laurent, A. -m. Seydoux-Guillaume, D. Fougerouse, D. Saxey, S. M. Reddy, S. L. Harley, S. Reynaud, W. D. A. Rickard
Summary: The discordance of U-Th-Pb isotopic systems in geochronometers and their interpretation remain major issues. This study investigated the discordant monazite from the Napier Complex in Antarctica to understand the relationship between discordance and the preservation of Pb*-bearing nanocrystals. The results highlight the potential of nanoscale studies of monazite to provide important details of the thermal history of complex metamorphic terranes.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Astronomy & Astrophysics
Thomas Stephan, Andrew M. Davis
Summary: Molybdenum isotopes in presolar silicon carbide grains and meteorites are influenced by s-process and r-process contributions, with the variations in meteoritic molybdenum isotopes primarily due to s-process enrichments or depletions. By comparing isotopic data, the dichotomy in meteorites can be explained, and a fixed ratio between s-, r-, and p-process contributions is suggested.
ASTROPHYSICAL JOURNAL
(2021)
Article
Geochemistry & Geophysics
John P. Bradley, Hope A. Ishii, Karen Bustillo, James Ciston, Ryan Ogliore, Thomas Stephan, Donald E. Brownlee, David J. Joswiak
Summary: This study investigates the provenance of GEMS (glass with embedded metal and sulfides) in cometary type interplanetary dust particles using analytical scanning transmission electron microscopy and secondary ion mass spectrometry. The researchers find that GEMS have low densities and their elemental compositions and distributions are perturbed by contamination and secondary alteration. Oxygen isotope compositions are generally poor indicators of provenance, while nitrogen isotope compositions are more diagnostic. Based on all the observations, the authors conclude that GEMS are most likely processed interstellar silicates.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Biodiversity Conservation
Janet R. Voight, Philipp R. Heck, Kevin T. Du Clos
Summary: This article explores the impact of biotic interactions on the structure of deep-sea communities. The study focuses on wood borers and their competition for sunken wood habitats. The results show that Xylophaga dorsalis clade species bore faster and more extensively than other wood borers, potentially due to their ability to exploit low-oxygen environments.
MARINE BIODIVERSITY
(2023)
Article
Physics, Atomic, Molecular & Chemical
Thomas Stephan, Reto Trappitsch
Summary: The paper discusses the problem of correlated errors in experimental data and provides tools for propagating uncertainties in such cases. Techniques applicable to three-isotope plots in geo-and cosmochemistry are specifically discussed, where common denominators in isotope ratios and instrumental effects could lead to significant correlation of errors. The paper also compares various techniques for calculating linear regressions and suggests that the method proposed by Mahon (1996) [1] gives the best results after correcting some typographical errors and eliminating a minor mistake. A method for calculating linear regressions through a fixed point is also provided to avoid previous mistakes.
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
(2023)
Meeting Abstract
Geochemistry & Geophysics
B. Schmitz, P. R. Heck
METEORITICS & PLANETARY SCIENCE
(2023)
Meeting Abstract
Geochemistry & Geophysics
Maria C. Valdes, Clara L. Blattler, Dan Razionale, Philipp R. Heck
METEORITICS & PLANETARY SCIENCE
(2023)
Meeting Abstract
Geochemistry & Geophysics
X. Yang, M. Zhang, J. M. Korsmeyer, J. Greer, A. M. Davis, N. T. Kita, P. R. Heck
METEORITICS & PLANETARY SCIENCE
(2023)
Meeting Abstract
Geochemistry & Geophysics
Y. Zheng, P. R. Heck, X. Yang, E. Santos, M. Alexandre, Y. Huang, J. P. Dworkin, D. P. Glavin, H. C. Connolly, D. S. Lauretta
METEORITICS & PLANETARY SCIENCE
(2023)
Meeting Abstract
Geochemistry & Geophysics
James A. Barranco, Krysten L. Villalon, Julie M. Korsmeyer, Jennika Greer, Philipp R. Heck
METEORITICS & PLANETARY SCIENCE
(2023)
Article
Physics, Nuclear
Nan Liu, Thomas Stephan, Sergio Cristallo, Diego Vescovi, Roberto Gallino, Larry R. Nittler, Conel M. O' D. Alexander, Andrew M. Davis
Summary: We report the Sr and Ba isotopic compositions of 18 presolar SiC grains, showing that Y and Z grains have higher Sr-88/Sr-87 ratios and more variable Ba-138/Ba-136 ratios compared to mainstream grains. Our findings suggest that the Y and Z grains originated from low-mass AGB stars, supporting previous research, although they fail to explain the indistinguishable Mo isotopic compositions.
EUROPEAN PHYSICAL JOURNAL A
(2022)
Meeting Abstract
Geochemistry & Geophysics
T. Stephan, H. E. Bloom, P. Hoppe, A. M. Davis, J. M. Korsmeyer, A. Regula, P. R. Heck, S. Amari
METEORITICS & PLANETARY SCIENCE
(2022)
Meeting Abstract
Geochemistry & Geophysics
N. Liu, T. Stephan, S. Cristallo, D. Vescovi, R. Gallino, L. R. Nittler, C. M. O'D. Alexander, A. M. Davis
METEORITICS & PLANETARY SCIENCE
(2022)
Meeting Abstract
Geochemistry & Geophysics
A. Regula, H. E. Bloom, N. Dauphas, A. M. Davis, J. M. Korsmeyer, M. J. Krawczynski, M. J. Pellin, S. Sheu, T. Stephan
METEORITICS & PLANETARY SCIENCE
(2021)
Meeting Abstract
Geochemistry & Geophysics
T. Stephan, H. E. Bloom, A. M. Davis, P. Hoppe, J. M. Korsmeyer, M. J. Pellin, A. Regula, S. Sheu
METEORITICS & PLANETARY SCIENCE
(2021)
Article
Astronomy & Astrophysics
Asmaa Boujibar, Samantha Howell, Shuang Zhang, Grethe Hystad, Anirudh Prabhu, Nan Liu, Thomas Stephan, Shweta Narkar, Ahmed Eleish, Shaunna M. Morrison, Robert M. Hazen, Larry R. Nittler
Summary: Cluster analysis of presolar silicon carbide grains based on various isotopic ratios revealed nine clusters representing different grain types, with mainstream grains mainly classified into three clusters possibly from stars of different metallicities. The inclusion of Al-26/Al-27 data highlighted a cluster enriched in N-15 and Al-26 not explainable by current models. This study also identified clusters of AB grains with excesses of N-15 and Al-26, pointing towards a need for more isotopic data for improved classification.
ASTROPHYSICAL JOURNAL LETTERS
(2021)