Article
Materials Science, Multidisciplinary
Benjamin K. Derby, Terry G. Holesinger, James A. Valdez, Blas P. Uberuaga, Cortney R. Kreller
Summary: In this study, microstructural analysis of Gd2Ti2O7 thin films under different synthesis conditions was conducted using transmission electron microscopy. It was found that the film structure was sensitive to process gas pressure and substrate temperature during sputtering, resulting in different morphologies of the thin films. The results provide insights into the temperature-dependent film morphology in complex oxides and are rationalized via an adatom mobility description.
MATERIALS & DESIGN
(2021)
Article
Polymer Science
Elodie Strupiechonski, Marisa Moreno-Rios, Erika O. Avila-Davila, Ramon Roman-Doval, Evgeny Prokhorov, Yuriy Kovalenko, Diana G. Zarate-Trivino, Dora Medina, Gabriel Luna-Barcenas
Summary: Chitosan-gold nanoparticle thin films were synthesized through chemical reduction of HAuCl4. The behavior of these films was investigated in relation to moisture and HAuCl4 content, revealing two relaxation processes related to glass transition and local diffusion of ions. The HAuCl4 content affected the conductivity of the films, demonstrating a percolation effect.
Article
Multidisciplinary Sciences
Fan Yang, Jun Li, Yin Long, Ziyi Zhang, Linfeng Wang, Jiajie Sui, Yutao Dong, Yizhan Wang, Rachel Taylor, Dalong Ni, Weibo Cai, Ping Wang, Timothy Hacker, Xudong Wang
Summary: The research introduces a novel approach for the large-scale fabrication of piezoelectric biomaterial thin films with excellent piezoelectric properties and mechanical flexibility. The glycine-PVA films, with their natural compatibility and degradability in physiological environments, have the potential to advance the development of transient implantable electromechanical devices.
Article
Multidisciplinary Sciences
Utkarsh Anand, Tanmay Ghosh, Zainul Aabdin, Siddardha Koneti, XiuMei Xu, Frank Holsteyns, Utkur Mirsaidov
Summary: Researchers have found that the wetting process of water on a surface patterned with a dense array of nanopillars occurs in two stages: first, an ultra-thin precursor water film forms on the surface, and then capillary action by the nanopillars pulls the water, increasing the overall thickness of the water film.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Mechanics
Marco De Corato, Daniele Tammaro, Pier Luca Maffettone, Norberto Fueyo
Summary: In this study, we investigate the retraction of a circular thin film coated with insoluble surfactants after being punctured. Our simulations show that the presence of surfactants slows down the retraction rate and introduces oscillations. As the surface elasticity increases, the film thickness perturbations spread over a larger area. Additionally, the surface perturbations travel faster than the retracting edge of the film at a speed proportional to the Gibbs modulus, approaching the behavior of an incompressible two-dimensional solid for large Gibbs modulus values.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Chemistry, Physical
Wenxuan Wang, Shan Hu, Zelang Jian, Wen Chen
Summary: NASICON-based solid-state batteries have shown great potential for high safety and high energy density. However, unstable interface contact often leads to sodium dendrite formation and cell failure. Through asymmetric stripping/plating method, the evolution process of the NASICON/Na interface is investigated, and a continuous Na+ transport pathway is constructed, improving the cycling stability of the battery.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Engineering, Mechanical
Chen Ma, Chao Chen, Zhi Xu, Cunjing Lv, Quanshui Zheng
Summary: This study examines the intrinsic nature of curvature effect on contact angles from a molecular perspective and validates the theoretical model through molecular dynamics simulations. It reveals a unified curvature effect on different fluids on concave and convex substrates, which is amplified on more wettable substrates.
EXTREME MECHANICS LETTERS
(2021)
Article
Mechanics
C. R. Constante-Amores, L. Kahouadji, S. Shin, J. Chergui, D. Juric, J. R. Castrejon-Pita, O. K. Matar, A. A. Castrejon-Pita
Summary: We investigate the influence of insoluble surfactants on the impact of surfactant-free droplets onto surfactant-laden thin liquid films using a three-dimensional numerical simulation approach. Our results show that the presence of surfactants affects the late stages of the dynamics by delaying the end-pinching mechanisms, resulting in longer ligaments. We also demonstrate that the addition of surfactants leads to surface rigidification and retards the flow dynamics.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Physics, Applied
Anna Zigelman, Amy Novick-Cohen
Summary: The study investigates the energetic and dynamic stability of a single axisymmetric grain with a hole at its center, establishing a criterion based on a critical effective hole radius. Numerical simulation is used to analyze the steady states and their dynamic stability, confirming and expanding conclusions drawn from energetic considerations. The research also contributes to understanding various phenomena observed in experiments and emphasizes the importance of monitoring spatial variations in mean curvature to connect theoretical predictions with experimental results.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Ioannina Castano, Austin M. Evans, Roberto dos Reis, Vinayak P. Dravid, Nathan C. Gianneschi, William R. Dichtel
Summary: Researchers have successfully overcome the challenge of acquiring high-resolution images of 2D COF films by using low electron flux imaging conditions and high-speed direct electron counting detectors. They have developed a Fourier mapping technique to rapidly extract nanoscale structural information, allowing for analysis of polycrystalline domain orientations and quantification of average domain sizes. Additionally, the technique provides information on various defects in the films, such as overlapping grains and different types of grain boundaries, shedding light on the fundamental microstructure and crystallographic underpinnings of 2D COF films.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Bidisha Bhatt, Shivam Gupta, Meenaxi Sharma, Krishnacharya Khare
Summary: The stability of thin lubricating fluid-coated slippery surfaces depends on the surface energy of the underlying solid surface. Experiments show that underneath lubricating films undergo initial thinning and subsequently dewet, with the dewetting dynamics and final pattern depending strongly on the thickness of the lubricating films.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Maryna Storozhenko, Oleksandr Umanskyi, Vitaliy Krasovskyy, Oleksandr Terentiev, Valeriy Muratov, Dmytro Vedel
Summary: In a vacuum environment, it was observed that NiCrBSiC alloy effectively wets the ZrB2 substrate, resulting in a contact angle of 42 degrees. The ZrB2 substrate dissolves in the molten drop and new phases are formed in the ZrB2-NiCrBSiC system.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Chemistry, Multidisciplinary
Jing Zhong, Xi Zhang, Wa He, Dan Gong, Mu Lan, Xu Dai, Yong Peng, Gang Xiang
Summary: In this study, large-scale synthesis of three-dimensional molybdenum selenide (MoSe2) thin films with robust room-temperature ferromagnetism (RTFM) was achieved using polymer-assisted deposition. The high saturation magnetization and low coercivity of the prepared films were attributed to the Ruderman-Kittel-Kasuya-Yoshida (RKKY) interaction between magnetic moments induced by abundant molybdenum vacancies. These findings provide insights into the large-scale production and robust RTFM of MoSe2 thin films and have potential implications in the design and fabrication of spintronic materials and devices based on transition-metal dichalcogenides.
Article
Mechanics
N. Malkiel, O. Rabinovitch
Summary: This study investigates the dynamic buckling-driven delamination of thin films, emphasizing the dynamic nature of the compressive delamination process. A 1D problem and its Finite Element numerical counterpart are formulated based on the cohesive interface approach, Bernoulli-Euler beam model, and Newtonian dynamics to capture the mutual and coupled evolution of buckling and delamination. The significant dynamic effects on the structural response, including displacements, energies, delamination length, reactions, and internal forces, are demonstrated.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Chemistry, Physical
Sungyeon Heo, Kwangdong Roh, Fengyu Zhang, Steven E. Tignor, Andrew B. Bocarsly, Antoine Kahn, Barry P. Rand
Summary: Electrochemical n-doping of halide perovskites is challenging due to limited electrochemical stability. In this study, we report the successful electrochemical n-doping of CsPbBr3 nanocrystal films within stable potential windows. The nanocrystal films show enhanced n-doping properties compared to bulk films, and the n-doped films exhibit Fermi level shifts and increased conductivity and photoluminescence intensity.
ACS ENERGY LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Hadas Sternlicht, Wolfgang Rheinheimer, Michael J. Hoffmann, Wayne D. Kaplan
JOURNAL OF MATERIALS SCIENCE
(2016)
Article
Physics, Applied
V. Mikhelashvili, G. Ankonina, Y. Kauffmann, G. Atiya, W. D. Kaplan, R. Padmanabhan, G. Eisenstein
JOURNAL OF APPLIED PHYSICS
(2017)
Article
Materials Science, Multidisciplinary
Hadar Nahor, Yaron Kauffmann, Sorin Lazar, Doron Shilo, Wayne D. Kaplan
Article
Materials Science, Ceramics
Hadas Sternlicht, Stephanie A. Bojarski, Gregory S. Rohrer, Wayne D. Kaplan
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2018)
Article
Materials Science, Multidisciplinary
Hadas Sternlicht, Wolfgang Rheinheimer, Rafal E. Dunin-Borkowski, Michael J. Hoffmann, Wayne D. Kaplan
JOURNAL OF MATERIALS SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
Hadas Sternlicht, Wolfgang Rheinheimer, Judy Kim, Emanuela Liberti, Angus I. Kirkland, Michael J. Hoffmann, Wayne D. Kaplan
JOURNAL OF MATERIALS SCIENCE
(2019)
Article
Materials Science, Ceramics
Hadar Nahor, Wayne D. Kaplan
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2019)
Article
Materials Science, Ceramics
Ruth Moshe, Wayne D. Kaplan
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2019)
Article
Materials Science, Ceramics
Ruth Moshe, Wayne D. Kaplan
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2019)
Article
Materials Science, Multidisciplinary
Hadar Nahor, Yaron Kauffmann, Wayne D. Kaplan
Article
Materials Science, Multidisciplinary
Ting Mao, Hadar Nahor, Wayne D. Kaplan
JOURNAL OF MATERIALS SCIENCE
(2019)
Article
Materials Science, Ceramics
Priyadarshini Ghosh, Rachel Marder, Alex Berner, Wayne D. Kaplan
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2020)
Article
Materials Science, Ceramics
Rachel Marder, Priyadarshini Ghosh, Ivar Reimanis, Wayne D. Kaplan
Summary: The influence of carbon as a dopant on grain growth and wear resistance of polycrystalline alumina was evaluated. Doping alumina with carbon resulted in a reduced grain size after sintering, correlated to solute-drag and graphite particle-drag for high concentrations of carbon. Sintering alumina with carbon resulted in a significant increase in wear resistance due to the reduced grain size.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Li-or Cohen, Priyadarshini Ghosh, Alex Berner, Rachel Marder, Wayne D. Kaplan
Summary: The solubility limit of carbon in alpha-Al2O3 equilibrated at 1,600 degrees C was measured using wavelength-dispersive spectroscopy. It was found that carbon substitutes oxygen as an anion and is charge-compensated by oxygen vacancies. Doping alumina with carbon reduces grain growth, but excessive carbon doping hinders densification during sintering.
MICROSCOPY AND MICROANALYSIS
(2023)
Article
Nanoscience & Nanotechnology
Hadas Sternlicht, Wolfgang Rheinheimer, Alexander Mehlmann, Avner Rothschild, Michael J. Hoffmann, Wayne D. Kaplan
SCRIPTA MATERIALIA
(2020)
Article
Materials Science, Multidisciplinary
Y. Liu, K. Zweiacker, C. Liu, J. T. McKeown, J. M. K. Wiezorek
Summary: The evolution of rapid solidification microstructure and solidification interface velocity of hypereutectic Al-20at.%Cu alloy after laser melting has been studied experimentally. It was found that the formation of microstructure was dominated by eutectic, alpha-cell, and banded morphology grains, and the growth modes changed with increasing interface velocity.
Article
Materials Science, Multidisciplinary
Bharat Gwalani, Julian Escobar, Miao Song, Jonova Thomas, Joshua Silverstein, Andrew Chihpin Chuang, Dileep Singh, Michael P. Brady, Yukinori Yamamoto, Thomas R. Watkins, Arun Devaraj
Summary: Castable alumina forming austenitic alloys exhibit superior creep life and oxidation resistance at high temperatures. This study reveals the mechanism behind the enhanced creep performance of these alloys by suppressing primary carbide formation and offers a promising alloy design strategy for high-temperature applications.
Article
Materials Science, Multidisciplinary
Jian Song, Qi Zhang, Songsong Yao, Kunming Yang, Houyu Ma, Jiamiao Ni, Boan Zhong, Yue Liu, Jian Wang, Tongxiang Fan
Summary: Recent studies have shown that achieving an atomically flat surface for metals can greatly improve their oxidation resistance and enhance their electronic-optical applications. Researchers have explored the use of graphene as a covering layer to achieve atomically flat surfaces. They found that high-temperature deposited graphene on copper surfaces formed mono-atomic steps, while annealed copper and transferred graphene on copper interfaces formed multi-atomic steps.
Article
Materials Science, Multidisciplinary
Jennifer A. Glerum, Jon-Erik Mogonye, David C. Dunand
Summary: Elemental powders of Al, Ti, Sc, and Zr are blended and processed via laser powder-bed fusion to create binary and ternary alloys. The microstructural analysis and mechanical testing show that the addition of Ti results in the formation of primary precipitates, while the addition of Sc and Zr leads to the formation of fine grain bands. The Al-0.25Ti-0.25Zr alloy exhibits comparable strain rates to Al-0.5Zr at low stresses, but significantly higher strain rates at higher stresses during compressive creep testing. Finite element modeling suggests that the connectivity of coarse and fine grain regions is a critical factor affecting the creep resistance of the alloys.
Article
Materials Science, Multidisciplinary
P. Jannotti, B. C. Hornbuckle, J. T. Lloyd, N. Lorenzo, M. Aniska, T. L. Luckenbaugh, A. J. Roberts, A. Giri, K. A. Darling
Summary: This work characterizes the thermo-mechanical behavior of bulk nanocrystalline Cu-Ta alloys under extreme conditions. The experiments reveal that the alloys exhibit unique mechanical properties, behaving differently from conventional nanocrystalline Cu. They do not undergo grain coarsening during extrusion and exhibit behavior similar to coarse-grained Cu.
Article
Materials Science, Multidisciplinary
Yiqing Wei, Jingwei Li, Daliang Zhang, Bin Zhang, Zizhen Zhou, Guang Han, Guoyu Wang, Carmelo Prestipino, Pierric Lemoine, Emmanuel Guilmeau, Xu Lu, Xiaoyuan Zhou
Summary: This study proposes a new strategy to modify microstructure by phase regulation, which can simultaneously enhance carrier mobility and reduce lattice thermal conductivity. The addition of Cu in layered SnSe2 induces a phase transition that leads to increased grain size and reduced stacking fault density, resulting in improved carrier mobility and lower lattice thermal conductivity.
Article
Materials Science, Multidisciplinary
Jia Chen, Zhengyu Zhang, Eitan Hershkovitz, Jonathan Poplawsky, Raja Shekar Bhupal Dandu, Chang-Yu Hung, Wenbo Wang, Yi Yao, Lin Li, Hongliang Xin, Honggyu Kim, Wenjun Cai
Summary: In this study, the structural origin of the pH-dependent repassivation mechanisms in multi-principal element alloys (MPEA) was investigated using surface characterization and computational simulations. It was found that selective oxidation in acidic to neutral solutions leads to enhanced nickel enrichment on the surface, resulting in reduced repassivation capability and corrosion resistance.
Article
Materials Science, Multidisciplinary
X. Y. Xu, C. P. Huang, H. Y. Wang, Y. Z. Li, M. X. Huang
Summary: The limited slip systems of magnesium (Mg) and its alloys hinder their wide applications. By conducting tensile straining experiments, researchers discovered a rate-dependent transition in the dislocation mechanisms of Mg alloys. At high strain rates, glissile dislocations dominate, while easy-glide dislocations dominate at low strain rates. Abundant glissile dislocations do not necessarily improve ductility.
Article
Materials Science, Multidisciplinary
M. S. Szczerba, M. J. Szczerba
Summary: Inverse temperature dependences of the detwinning stress were observed in face-centered cubic deformation twins in Cu-8at.%Al alloy. The detwinning stress increased with temperature when the pi detwinning mode was involved, but decreased when the pi/3 mode was involved. The dual effect of temperature on the detwinning stress was due to the reduction of internal stresses pre-existing within the deformation twins. The complete reduction of internal stresses at about 530 degrees C led to the equivalence of the critical stresses of different detwinning modes and a decrease in the yield stress anisotropy of the twin/matrix structure.
Article
Materials Science, Multidisciplinary
Taowen Dong, Tingting Qin, Wei Zhang, Yaowen Zhang, Zhuoran Feng, Yuxiang Gao, Zhongyu Pan, Zixiang Xia, Yan Wang, Chunming Yang, Peng Wang, Weitao Zheng
Summary: The interaction between the electrode and the electric double layer (EDL) significantly influences the energy storage mechanism. By studying the popular alpha-Fe2O3 electrode and the EDL interaction, we find that the energy storage mechanism of the electrode can be controlled by modulating the EDL.
Article
Materials Science, Multidisciplinary
Matthew R. Barnett, Jun Wang, Sitarama R. Kada, Alban de Vaucorbeil, Andrew Stevenson, Marc Fivel, Peter A. Lynch
Summary: The elastic-plastic transition in magnesium alloy Mg-4.5Zn exhibits bursts of deformation, which are characterized by sudden changes in grain orientation. These bursts occur in a coordinated manner among nearby grains, with the highest burst rate observed at the onset of full plasticity. The most significant burst events are associated with twinning, supported by the observation of twinned structures using electron microscopy. The bursts are often preceded and followed by a stasis in peak movement, indicating a certain "birth size" for twins upon formation and subsequent growth at a later stage.
Article
Materials Science, Multidisciplinary
Vaidehi Menon, Sambit Das, Vikram Gavini, Liang Qi
Summary: Understanding solute segregation thermodynamics is crucial for investigating grain boundary properties. The spectral approach and thermodynamic integration methods can be used to predict solute segregation behavior at grain boundaries and compare with experimental observations, thus aiding in alloy design and performance control.
Article
Materials Science, Multidisciplinary
Feiyu Qin, Lei Hu, Yingcai Zhu, Yuki Sakai, Shogo Kawaguchi, Akihiko Machida, Tetsu Watanuki, Yue-Wen Fang, Jun Sun, Xiangdong Ding, Masaki Azuma
Summary: This study reports on the negative and zero thermal expansion properties of Cd2Re2O7 and Cd1.95Ni0.05Re2O7 materials, along with their ultra-low thermal conductivity. Through investigations of their structures and phonon calculations, the synergistic effect of local structure distortion and soft phonons is revealed as the key to achieving these distinctive properties.
Article
Materials Science, Multidisciplinary
Thomas Beerli, Christian C. Roth, Dirk Mohr
Summary: A novel testing system for miniature specimens is designed to characterize the plastic response of materials for which conventional full-size specimens cannot be extracted. The system has an automated operation process, which reduces the damage to specimens caused by manual handling and improves the stability of the test results. The experiments show that the miniature specimens extracted from stainless steel and aluminum have high reproducibility, and the results are consistent with those of conventional-sized specimens. A correction procedure is provided to consider the influence of surface roughness and heat-affected zone caused by wire EDM.
Article
Materials Science, Multidisciplinary
Rani Mary Joy, Paulius Pobedinskas, Nina Baule, Shengyuan Bai, Daen Jannis, Nicolas Gauquelin, Marie-Amandine Pinault-Thaury, Francois Jomard, Kamatchi Jothiramalingam Sankaran, Rozita Rouzbahani, Fernando Lloret, Derese Desta, Jan D'Haen, Johan Verbeeck, Michael Frank Becker, Ken Haenen
Summary: This study investigates the influence of film microstructure and composition on the Young's modulus and residual stress in nanocrystalline diamond thin films. The results provide insights into the mechanical properties and intrinsic stress sources of these films, and demonstrate the potential for producing high-quality nanocrystalline diamond films under certain conditions.
