Article
Plant Sciences
Harinderbir Kaur, Jean-Marie Teulon, Christian Godon, Thierry Desnos, Shu-wen W. Chen, Jean-Luc Pellequer
Summary: The plasticity and growth of plant cell walls under metal stress were investigated using atomic force microscopy (AFM). The combination of Fe2+ and Al3+ ions resulted in root-extension arrest and increased cell wall stiffness, while single Fe2+ or Al3+ ions only induced stiffness increase without root growth arrest.
PLANT CELL AND ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Victor G. Gisbert, Francsico M. Espinosa, Juan G. Sanchez, Maria Concepcion Serrano, Ricardo Garcia
Summary: The nanomechanical response of a cell is influenced by the frequency at which the cell is probed. At low frequencies or velocities, the response is dominated by the mechanical properties of the cell surface, while at high frequencies or velocities, the response is dominated by the hydrodynamic drag of the cytosol. Softening and fluidization do not involve structural remodeling, but rather a redistribution of stress between the solid and liquid-like elements of the cell.
Article
Materials Science, Characterization & Testing
Ilya A. Morozov
Summary: Polyurethane elastomer was studied by atomic force microscopy under fast nanoindentation conditions to investigate surface characteristics. The research found that the hard phase is unevenly distributed with the soft phase, and the indentation rate is influenced by various factors.
Article
Engineering, Electrical & Electronic
Ryota Fukuzawa, Daichi Kobayashi, Takuji Takahashi
Summary: Electrostatic force microscopy (EFM) is used to examine the electrostatic force between an AFM tip and sample surface, allowing evaluation of their capacitance and surface potential. The dependences of the electrostatic force on dc voltage and ac voltage frequency can be used to investigate carrier density, carrier type, and deep-level states in a semiconductor. Proper distance control is necessary in EFM to ensure accurate measurements, and the oscillation amplitude of a cantilever can be effectively used for feedback control. The 1 A-mode operation in EFM shows good robustness against the strong electrostatic force and allows proper measurements of tip-sample capacitance.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Materials Science, Multidisciplinary
Patricia Haremski, Lars Epple, Matthias Wieler, Piero Lupetin, Leonid Klinger, Eugen Rabkin, Michael J. Hoffmann
Summary: This study investigates surface self-diffusion in nickel bicrystals through experiments and numerical simulations. The results indicate that surface diffusion is the dominant mechanism of grain boundary grooving and the anisotropy of surface diffusion coefficients is determined accurately.
Article
Materials Science, Multidisciplinary
Patricia Haremski, Lars Epple, Matthias Wieler, Piero Lupetin, Richard Thelen, Michael J. Hoffmann
Summary: This study determined the relative grain boundary energies of nickel in SOFC anodes with high accuracy for the first time, providing reliable material parameters for realistic simulations to model the coarsening of nickel grains. The results showed consistent values across different conditions, ensuring the required accuracy in measuring grain boundary grooves.
Article
Chemistry, Multidisciplinary
Paolo Pellegrino, Isabella Farella, Mariafrancesca Cascione, Valeria De Matteis, Alessandro Paolo Bramanti, Antonio Della Torre, Fabio Quaranta, Rosaria Rinaldi
Summary: In recent years, Atomic Force Microscope (AFM)-based nanolithography techniques have become increasingly powerful. However, conventional methods are inefficient, have low pattern formation rates, and are complex to execute. In this study, we developed a simple and effective nanopatterning technique called Pulse-Atomic Force Lithography (P-AFL), which enabled us to pattern 2.5D nanogrooves on a thin polymer layer with sub-nanometre resolution, high accuracy, and reproducibility. We investigated the effects of P-AFL parameters on the morphology of 2.5D nanostructures and optimized the nanolithography process to achieve unconventional shape nanostructures with high accuracy and fidelity.
Article
Engineering, Multidisciplinary
Sen Gu, Miao Hao, Peng Pan, Xin Li, Junhui Zhu, Yong Wang, Changhai Ru
Summary: The novel SEM-based integrated nanoindentation, nanoscratch, and atomic force microscopy (AFM) instrument showed promise but faced the challenge of PRC signal drift due to electron irradiation from SEM. A method to reduce PRC signal drift was proposed and validated in this study.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Sy Hieu Pham, Anthony Ferri, Antonio Da Costa, M. M. Saj Mohan, Van Dang Tran, Duy Cuong Nguyen, Pascal Viville, Roberto Lazzaroni, Rachel Desfeux, Philippe Leclere
Summary: This study reports the high performance of transparent conductive electrodes (TCEs) based on silver nanowires (AgNWs) percolation networks. By optimizing the deposition conditions, AgNWs exhibit low sheet resistance and high optical transmittance. Conductive atomic force microscopy measurements reveal low resistivity of individual AgNWs and high current levels within the network. Thin-film electrodes based on AgNWs show great potential for future flexible electronic devices.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Yi Xu, Youquan Jia, Carlo Antonini, Yakang Jin, Longquan Chen
Summary: By immersing substrate-supported polymeric nanofilms in water, interfacial nanoblisters are formed as natural platforms for evaluating their mechanical properties. High-resolution force spectroscopy studies reveal that indentation tests must be conducted on the freestanding region around the nanoblister apex under an appropriate loading force to obtain load-independent, linear elastic deformations. The stiffness of the nanoblister increases with decreasing size or increasing covering film thickness, and this size effect can be explained by an energy-based theoretical model. This proposed methodology can provide an exceptional determination of the elastic modulus of the film and has potential applications in relevant fields.
Article
Chemistry, Multidisciplinary
Tianyao Zhang, Haibo Yu, Jialin Shi, Xiaoduo Wang, Hao Luo, Daojing Lin, Zhu Liu, Chanmin Su, Yuechao Wang, Lianqing Liu
Summary: This paper proposes an imaging method that combines atomic force microscopy with microlens-based scanning optical microscopy, which can achieve cross-scale rapid imaging and improve the efficiency of large-scale imaging and detection.
Article
Geochemistry & Geophysics
T. S. Charlton, M. Goodarzi, M. Rouainia, A. C. Aplin, P. Cubillas
Summary: This study investigates the geomechanical properties of organic-rich, calcareous shales buried to 100-180 degrees C, finding that the elastic stiffness increases with thermal maturity due to intense carbonate cementation. A multiscale model accurately predicts stiffness at micro and core scales, showing a negative correlation between creep modulus and clay/kerogen content.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Chemistry, Physical
A. Rodriguez, M. S. Jaman, O. Acikgoz, B. Wang, J. Yu, P. G. Grutzmacher, A. Rosenkranz, M. Z. Baykara
Summary: Ti3C2Tx nano-sheets exhibit solid lubrication properties on the nanoscale, reducing friction on silicon dioxide substrates, although not as effectively as few-layer graphene. This paves the way for further investigations into nanoscale solid lubrication achieved by Ti3C2Tx (MXene) nano-sheets.
APPLIED SURFACE SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Lingyun Kong, Fahimeh Hadavimoghaddam, Chunxiao Li, Kouqi Liu, Bo Liu, Amir Semnani, Mehdi Ostadhassan
Summary: This study compares the feasibility of using force spectroscopy methods and nanoindentation techniques to obtain elastic properties of shale. It was found that the modulus range in nanoindentation data is larger, but it becomes more difficult to identify organic matter from intermediary phases as thermal maturity increases. In contrast, AFM provides higher resolution modulus maps, allowing for more accurate distinction between different phases.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Materials Science, Characterization & Testing
P. Gahlen, S. Froebel, A. Karbach, D. Gabriel, M. Stommel
Summary: Polyisocyanurate (PIR) foams were examined for their local chemical composition using ATR-IR spectroscopy, with a focus on the PIR: Amide III intensity ratio as a parameter. Mechanical properties of the foam base material were analyzed at defined positions using AFM and Nanoindentation, with higher PIR: Amide III intensity ratio generally resulting in higher Young's modulus. The study also revealed the development of a new embedding method for nanoindentation, achieving more realistic and reproducible results compared to existing methods.
Article
Materials Science, Multidisciplinary
Zhiliang Pan, Valery Borovikov, Mikhail I. Mendelev, Frederic Sansoz
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
(2018)
Article
Chemistry, Physical
Xing Ke, Jianchao Ye, Zhiliang Pan, Jie Geng, Matt F. Besser, Dongxia Qu, Alfredo Caro, Jaime Marian, Ryan T. Ott, Y. Morris Wang, Frederic Sansoz
Article
Materials Science, Multidisciplinary
Xia Zhou, Wenming Bu, Shangyu Song, Frederic Sansoz, Xiaorun Huang
MATERIALS & DESIGN
(2019)
Article
Thermodynamics
Rodrigo Penide-Fernandez, Frederic Sansoz
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Article
Multidisciplinary Sciences
Qi Zhu, Zhiliang Pan, Zhiyu Zhao, Guang Cao, Langli Luo, Chaolun Ni, Hua Wei, Ze Zhang, Frederic Sansoz, Jiangwei Wang
Summary: This study reveals the dynamics of site-selective oxidation behavior in nanotwinned silver and palladium driven by individual stacking-faults and twin boundaries, providing an atomistic visualization of how planar defects influence complex reaction dynamics in metallic nanostructures. The findings shed light on the basic mechanisms at play in surface chemical reactions of nanomaterials, showcasing the potential for modifying physicochemical performances through defect engineering.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Qiongjiali Fang, Frederic Sansoz
Summary: This study investigates the effects of grain boundary (GB) strain accommodation on plastic deformation in columnar-grained nanocrystalline nanotwinned (nt) face-centered cubic metals. The research findings show that CTB strengthening effects are increasingly more pronounced in columnar-grained nt metals as their shear modulus increases.
Article
Thermodynamics
Rodrigo Penide-Fernandez, Frederic Sansoz
Summary: This article investigates the performance of woven-fiber ceramic materials in the design of insulative lay-up structures for thermal protection systems. A thermomechanical multiscale model is developed to study Knudsen effects by adjusting gas pressure conditions. The dependency of thermal conductivity on fiber volume fraction decreases significantly with pressure reduction.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Materials Science, Ceramics
Zhuang Liu, Jason M. Meyers, Jeffrey Schindler, Frederic Sansoz, Ting Tan, Douglas G. Fletcher
Summary: This article reports direct measurements of tensile properties in Hi-Nicalon silicon carbide fibers exposed to high-temperature argon plasma, showing a 59% reduction in tensile strength compared to the virgin fibers. Fractographic characterization using scanning electron microscopy indicates that the degradation in strength is mainly caused by a reduction in fiber cross-section due to surface attack from the high-temperature argon plasma.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Multidisciplinary Sciences
Qi Zhu, Lingyi Kong, Haiming Lu, Qishan Huang, Yingbin Chen, Yue Liu, Wei Yang, Ze Zhang, Frederic Sansoz, Haofei Zhou, Jiangwei Wang
Summary: The research reveals the unprecedented shear deformability of twins in nanocrystals, with extreme shear deformability up to 364% through TB sliding. The study shows that sliding-induced plasticity is orientation-dependent and relies critically on geometric inhomogeneities, which has implications for improving metal processing by severe plastic deformation.
Article
Materials Science, Multidisciplinary
Frederic Sansoz, Xing Ke
Summary: The breakdown of grain-size strengthening to softening mechanisms in nanocrystalline alloys, particularly with regards to grain-boundary solute segregation, has been investigated through large-scale simulations. Three concentration-dependent regimes of plasticity were identified, including classical segregation strengthening, shear band-induced softening, and a previously unknown plateau of maximum strengths for intermediate solute contents. The findings highlight the complex roles of solute segregation and interfacial plasticity mechanisms in nanocrystalline alloys.
Article
Materials Science, Multidisciplinary
Eve-Audrey Picard, Frederic Sansoz
Summary: This study investigated the solute segregation phenomena in nanocrystalline alloys and identified various segregation configurations in different alloys, including heterogeneous segregation and homogeneous segregation. The findings highlight the significant impact of solute interactions on segregation and mechanical behavior.
Article
Nanoscience & Nanotechnology
Tara Nenninger, Frederic Sansoz
Summary: We have developed an efficient molecular-statics algorithm for predicting the effects of solute-solute interaction on grain-boundary segregation. The results show that the strength of interaction between two solutes is directly correlated with the change of average segregation energy in the local atomic environment of a fixed grain-boundary solute. Moreover, long-range attractive effects increase the likelihood of solute cluster nucleation.
SCRIPTA MATERIALIA
(2023)
Proceedings Paper
Automation & Control Systems
Trevor Avant, Kristi A. Morgansen
2020 AMERICAN CONTROL CONFERENCE (ACC)
(2020)
Article
Materials Science, Multidisciplinary
Zhiliang Pan, Frederic Sansoz
Article
Chemistry, Multidisciplinary
Jiangwei Wang, Guang Cao, Ze Zhang, Frederic Sansoz
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.
