Article
Chemistry, Physical
Ondrej Dyck, Andrew R. Lupini, Stephen Jesse
Summary: The engineering of quantum materials involves the development of tools for synthesis and characterization challenges. One key factor is atomic-scale modification for desired atomic structures. The use of scanning transmission electron microscopes (STEMs) allows for atomic-scale material manipulation but obstacles like in situ material delivery exist. This article presents progress on in situ thermal deposition platform for synthesis processes in a scanning transmission electron microscope.
Article
Chemistry, Multidisciplinary
Jose M. Sojo-Gordillo, Gerard Gadea-Diez, David Renahy, Marc Salleras, Carolina Duque-Sierra, Pascal Vincent, Luis Fonseca, Pierre-Olivier Chapuis, Alex Morata, Severine Gomes, Albert Tarancon
Summary: A combined scanning thermal microscope and scanning electron microscope was used to characterize a suspended silicon nanowire. The thermal and mechanical properties were measured simultaneously, and the effects of the rough surface on heat dissipation and stiffness were studied.
Article
Chemistry, Physical
Mansheng Liao, Qiaomei Zhu, Shuhua Li, Qiongqiong Li, Ziting Tao, Yongchun Fu
Summary: Strain engineering is a useful strategy for modifying the catalytic activity of electrocatalysts. However, visual characterization of the strain effect on catalytic activity at the nanoscale is challenging. In this study, in-situ electrochemical scanning tunneling microscopy (EC-STM) imaging measurements and current noise analysis (n-EC-STM) were performed on localized strained regions of single-crystal molybdenum dioxide (MoO2) sheets. Enhanced noise was observed in the strained regions compared to unstrained regions, indicating a positive effect of compressive strain on the hydrogen evolution reaction (HER) activity of MoO2. This study provides visual evidence of strain-induced enhancement of HER activity at the nanoscale, expanding the understanding of strain engineering in electrocatalysis and related fields.
Article
Materials Science, Multidisciplinary
Junquan Huang, Yujun Chen, Chong Wang, Penghui Li, Ke Tong, Mengke Kang, Tianye Jin, Wentao Hu, Junyun Chen, Mengdong Ma, Bo Xu, Anmin Nie, Yongjun Tian
Summary: A study was conducted to investigate the anisotropic performance of a thick 3C-SiC single crystal through in-situ nano-scratching. The crystal exhibited different hardness, material removal rate, and coefficient of friction when scratched along different directions. Plastic material removal was achieved through dislocation slip and lattice distortion. Perfect dislocation slip and intense strain caused polycrystallization, which was identified as a significant deformation mechanism in 3C-SiC.
SCIENCE CHINA-MATERIALS
(2023)
Article
Polymer Science
Alexander Delp, Alexander Becker, Daniel Huelsbusch, Ronja Scholz, Marc Mueller, Birgit Glasmacher, Frank Walther
Summary: The microstructural responses to mechanical load of polymers used in tissue engineering, especially the promising polycaprolactone (PCL), are of great significance for in vivo testing qualification. Electrospun PCL scaffolds with varying degrees of fiber alignment were produced to investigate the impact of fiber alignment on material performance. By conducting in situ tensile testing in scanning electron microscopy and utilizing selected tracking techniques, fiber/fiber area displacements and local fractures of single PCL fibers under quasi-static tensile load and fiber alignment were visualized and quantified. The feasibility of displacement determination using in situ scanning electron microscopy techniques for testing fibrous PCL scaffolds was introduced and measured.
Article
Engineering, Multidisciplinary
Shuiquan Pang, Xianmin Zhang, Hai Li, Yihua Lu
Summary: This study proposes a method to improve edge determination in SEM images by utilizing inpainting and adaptive anisotropic diffusion strategies. The method effectively reduces edge blooming and noise effects, improving the robustness and accuracy of edge determination. Applications in measuring microstructures with known dimensions are demonstrated to showcase the effectiveness of the proposed method.
Article
Materials Science, Multidisciplinary
Amrita Lall, Paul Bowen, Afsaneh Rabiei
Summary: The research conducted experimental evaluation of creep properties of Alloy 709 in the temperature range of 750-850 degrees C, using in-situ heating-loading and Scanning Electron Microscope (SEM) unit. Accelerated creep tests were performed to obtain multiple data points in the same test, saving time and usage of SEM, and understanding the creep damage mechanism of Alloy 709.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Textiles
A. Stalin, S. Mothilal, V. Vignesh, M. R. Sanjay, Suchart Siengchin
Summary: Green sustainable life and biofibers are important for achieving an eco-friendly environment and fabricating eco-friendly products. This study focuses on the effect of hybrid mats on the reinforcement of vetiver/banana fiber mat reinforced vinyl ester composites. The results show that the hybrid double-layer fiber mat composites in longitudinal direction have optimal tensile and flexural properties.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Polymer Science
Rene Daher, Ivo Krejci, Enrico di Bella, Laurine Marger
Summary: The study evaluated the use of digital optical microscopy (DOM) for analyzing marginal adaptation of dental adhesive interfaces, comparing it with scanning electron microscopy (SEM). The results showed no statistically significant difference between DOM and SEM analysis, and DOM analysis took less time.
Article
Chemistry, Multidisciplinary
Ondrej Dyck, Andrew R. Lupini, Stephen Jesse
Summary: In this study, we demonstrate an electron beam direct-write process in an aberration-corrected scanning transmission electron microscope. This process differs from conventional electron-beam-induced deposition techniques as it uses a different mechanism and elemental tin (Sn) as a precursor to enable atom-by-atom direct writing. The atomic-sized electron beam is used to generate chemically reactive point defects in a graphene substrate, allowing the precursor atoms to migrate and bond to the defect sites for deposition.
Article
Nanoscience & Nanotechnology
Di Wan, Anette Brocks Hagen, Luigi Mario Viespoli, Audun Johanson, Filippo Berto, Antonio Alvaro
Summary: Distribution of electrical energy through subsea power cables plays a crucial role in renewable power generation. The use of copper as a conductor material in most subsea cables leads to microstructural damage due to fatigue, creep and their interaction caused by static and cyclic loads. To provide a deeper understanding of the damage mechanisms, in-situ micromechanical testing was conducted on micro-sized copper tensile specimens, revealing a correlation between damage mechanisms and deformation status.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Multidisciplinary
Erin E. Fleck, Matthew R. Barone, Hari P. Nair, Nathaniel J. Schreiber, Natalie M. Dawley, Darrell G. Schlom, Berit H. Goodge, Lena F. Kourkoutis
Summary: This study presents a semi-automated technique based on STEM images to detect and quantify the presence of different n-phases and quantify the local structure. This method is applicable to a wide range of layered materials.
Article
Chemistry, Multidisciplinary
Michelle A. Smeaton, Ismail El Baggari, Daniel M. Balazs, Tobias Hanrath, Lena F. Kourkoutis
Summary: Epitaxially connected quantum dot solids have the potential for highly tunable electronic structures, but defective interdot connections have hindered the realization of predicted emergent electronic properties. In situ heating in the scanning transmission electron microscope has shown that thermal annealing can effectively eliminate tensile and shear defects, while bending defects still persist. Tracking the out-of-plane orientation of individual quantum dots reveals an increase in correctly oriented dots, indicating a relaxation of twisting or bending defects.
Article
Polymer Science
Dongmei Huang, Yun Dong, Hang Guo, Erjie Yang, Yiwen Chen, Mi Luo, Ziwen Pan, Jiandang Liu, Liangbin Li, Hongjun Zhang, Bangjiao Ye
Summary: Using the newly developed high count rate positron annihilation lifetime spectroscopy (PALS) facility, in situ PALS experiments were performed for the first time on the continuous stretching process of polymers to analyze the minute-scale evolution of free-volume holes. The tensile process was divided into four distinct stages based on the stress-strain relationship and PALS results, showing the enlargement of free-volume hole size and increasing anisotropy of free-volume holes. This work demonstrates the feasibility of disclosing the minute-scale evolution of material microstructure through in situ PALS experiments.
Article
Materials Science, Multidisciplinary
J. P. Goulmy, D. Depriester, F. Guittonneau, L. Barrallier, S. Jegou
Summary: Understanding the mechanisms at the microstructure scale is crucial for modeling material behavior. This study explores the use of high resolution digital image correlation (HRDIC) combined with in situ Scanning Electron Microscope (SEM) tests to establish a connection between polycrystalline modeling and experiment. The tensile behavior of a pure copper polycrystal is evaluated using HRDIC, and the impact of grain orientation on mechanical behavior is discussed through EBSD analysis.
MATERIALS CHARACTERIZATION
(2022)
Article
Engineering, Manufacturing
Mojtaba Khanzadeh, Prahalada Rao, Ruholla Jafari-Marandi, Brian K. Smith, Mark A. Tschopp, Linkan Bian
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
(2018)
Article
Materials Science, Multidisciplinary
Jie Chen, Mark A. Tschopp, Avinash M. Dongare
JOURNAL OF MATERIALS SCIENCE
(2018)
Review
Materials Science, Multidisciplinary
Mark A. Atwater, Laura N. Guevara, Kris A. Darling, Mark A. Tschopp
ADVANCED ENGINEERING MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Philip E. Goins, Heather A. Murdoch, Efrain Hernandez-Rivera, Mark A. Tschopp
COMPUTATIONAL MATERIALS SCIENCE
(2018)
Article
Engineering, Industrial
Mojtaba Khanzadeh, Sudipta Chowdhury, Mohammad Marufuzzaman, Mark A. Tschopp, Linkan Bian
JOURNAL OF MANUFACTURING SYSTEMS
(2018)
Article
Engineering, Industrial
Mojtaba Khanzadeh, Sudipta Chowdhury, Mark A. Tschopp, Haley R. Doude, Mohammad Marufuzzaman, Linkan Bian
Article
Materials Science, Multidisciplinary
Lydia A. Jordan, M. A. Tschopp, Todd E. Mlsna, David Wipf, M. F. Horstemeyer
CORROSION ENGINEERING SCIENCE AND TECHNOLOGY
(2019)
Article
Engineering, Manufacturing
Amir M. Aboutaleb, Mohammad J. Mahtabi, Mark A. Tschopp, Linkan Bian
JOURNAL OF MANUFACTURING PROCESSES
(2019)
Article
Engineering, Manufacturing
Seyyed Hadi Seifi, Wenmeng Tian, Haley Doude, Mark A. Tschopp, Linkan Bian
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
(2019)
Article
Materials Science, Multidisciplinary
Saeed Z. Chavoshi, Mark A. Tschopp, Paulo S. Branicio
PHILOSOPHICAL MAGAZINE
(2019)
Article
Materials Science, Multidisciplinary
Cody Dyar, Shane Brauer, William Williams, Haley Doude, Wilburn Whittington, Andrew Oppedal, Haitham El Kadiri, Mark Tschopp, Hongjoo Rhee
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2020)
Review
Materials Science, Multidisciplinary
YubRaj Paudel, Deepesh Giri, Matthew W. Priddy, Christopher D. Barrett, Kaan Inal, Mark A. Tschopp, Hongjoo Rhee, Haitham El Kadiri
Summary: This paper reviews the existing approaches to incorporating twinning in crystal plasticity models, discusses their capabilities, addresses their limitations, and suggests prospective views to fill gaps. The incorporation of a new physics-based twin nucleation criterion in crystal plasticity models holds groundbreaking potential for substantial progress in the field of computational material science.
Article
Nanoscience & Nanotechnology
Joseph Messina, Renjie Luo, Ke Xu, Guanghong Lu, Huiqiu Deng, Mark A. Tschopp, Fei Gao
Summary: Magnesium alloys have advantages in applications due to their high strength-to-weight ratio, but properties like corrosion resistance, formability, and creep are still concerns, especially in magnesium-aluminum alloys. This study quantifies aluminum segregation energetics at grain boundaries using atomistic simulations, showing that the segregation of aluminum is influenced by grain boundary structure and the local atomic environment, which has broad implications for grain boundary science and engineering.
SCRIPTA MATERIALIA
(2021)
Article
Engineering, Manufacturing
Mojtaba Khanzadeh, Wenmeng Tian, Aref Yadollahi, Haley R. Doude, Mark A. Tschopp, Linkan Bian
ADDITIVE MANUFACTURING
(2018)
Article
Engineering, Multidisciplinary
Mark A. Tschopp, B. Chris Rinderspacher, Sasan Nouranian, Mike I. Baskes, Steven R. Gwaltney, Mark F. Horstemeyer
ASCE-ASME JOURNAL OF RISK AND UNCERTAINTY IN ENGINEERING SYSTEMS PART B-MECHANICAL ENGINEERING
(2018)