Article
Polymer Science
Anna-Maria Marta Ruth Persson, Erik Andreassen
Summary: This study compared the performance of TPV and LSR in cyclic compression tests, finding that TPV had higher compression set and hysteresis loss, along with a stronger Mullins effect, while LSR showed lower compression set.
Article
Engineering, Mechanical
Christopher W. Barney, Matthew E. Helgeson, Megan T. Valentine
Summary: In this study, the bulk modulus of silicone blends with variable crosslinking density and sol fraction was investigated using radially confined compression. The results showed that the bulk modulus is systematically altered when changing the network structure. This finding provides a deeper understanding of the connection between bulk modulus and molecular structure of nearly incompressible polymer networks.
EXTREME MECHANICS LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Yong Deng, Nan Xie, Wenyu Hu, Zhenyu Ma, Fujun Xu, Longqing Chen, Wenbin Qiu, Lin Zhao, Hong Tao, Bo Wu, Yi Huang, Jian Ma, Xiaoyi Wang, Xuqi Zhang, Yang Qiu, Xudong Cui, Chaoyuan Jin, Marie-Pierre Chauvat, Pierre Ruterana, Thomas Walther
Summary: The growth of a 5 μm thick AlN thin film on a patterned (0001) sapphire substrate was studied using a probe aberration-corrected scanning transmission electron microscope. By analyzing the twisted atomic structure at different depths, it was found that a 1.6 degrees twist of the c-planes balanced over 10% of local tensile and compressive strain within the first micron of growth. This led to a reduction in threading dislocations. The in-plane twist decreased towards the layer surface down to 0.5 degrees, indicating improved crystal quality.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Dhiraj Kumar Bharti, Rajni Verma, Sonam Rani, Daksh Agarwal, Sonali Mehra, Amit Kumar Gangwar, Bipin Kumar Gupta, Nidhi Singh, Avanish Kumar Srivastava
Summary: In this study, highly crystalline bi-functional manganese-doped zinc silicate (Mn-doped Zn2SiO4) nanostructures were synthesized using a low-cost sol-gel route followed by solid state reaction method. Structural and morphological characterizations of the doped nanostructures were conducted using X-ray diffraction and high-resolution transmission electron microscopy (HR-TEM) techniques. Photoluminescence (PL) spectra showed strong green emission at 521 nm under 259 nm excitation wavelengths, with the intensity increasing with increasing Mn-doping concentration. The magnetic properties of the doped nanostructures were also investigated. These findings open up new possibilities for the application of Mn-doped Zn2SiO4 nanostructures in magneto-optical and spintronic devices.
Article
Materials Science, Multidisciplinary
Elze Porte, Rebecca Kramer-Bottiglio
Summary: Highly stretchable capacitive sensors are ideal for soft robotic control, but traditional models fail to accurately predict their performance due to the complex multi-layered structure and material properties. Measuring the Poisson's ratio of multi-layered hyperelastic capacitors and considering the anisotropy and strain-dependent characteristics of the material in predicting sensor performance are crucial for improvement.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Multidisciplinary Sciences
Ilya Svetlizky, Seongsoo Kim, David A. Weitz, Frans Spaepen
Summary: This study uses colloidal crystals to investigate the interactions and evolution of dislocations during plastic deformation, providing insights into the macroscopic deformation and atomic-scale dislocation dynamics of materials.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Environmental
Supandi Sujatono, Andy Erwin Wijaya
Summary: The quartz mineral content in sandstone has a significant impact on the modulus of elasticity and Poisson's ratio. The study found a strong correlation between quartz content and these properties, with an increase in quartz content leading to higher modulus of elasticity and Poisson's ratio.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Mechanics
Yi Zhang, Long Sun, Xin Ren, Xiang Yu Zhang, Zhi Tao, Yi Min Xie
Summary: Auxetic materials have weaker stiffness compared to solid structures due to internal holes, but a new methodology using variable stiffness scale factor (VSF) has been proposed to enhance their stiffness. Experimental investigation showed that the designed VSF can be effectively tuned by changing the height of the deformation area.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Salih Alper Akalin, Mustafa Erol, Begum Uzunbayir, Sibel Oguzlar, Serdar Yildirim
Summary: NiOx, Li:NiOx, and Li,Mg:NiOx powders were produced by sol-gel method, and their structural and optical properties were studied. XPS results confirmed the successful incorporation of Li+ and Mg2+ into NiOx structure, with decreased crystallite size as dopant concentration increased. Addition of Li+ and Mg2+ led to reduced emission intensity and average decay time compared to pristine NiOx.
Article
Construction & Building Technology
Bin Liang, Hai Zhang, Zhongxian Liu, Jilin Hou
Summary: The investigation of masonry buildings in Chinese villages revealed that over 90% of the buildings were made of masonry structures. The use of mortars in these structures has evolved from mud to white clay/slag and eventually to cement. This article highlights the discrepancy in compressive strength between the Chinese standard code and experimental results, prompting the testing of masonry columns with different types of mortars to modify the equations. The research delves into the stress-strain curve, elastic modulus, Poisson's ratio, and compressive strength of masonry columns. The findings indicate that the compressive strength of the masonry increases with the strength of the mortar. The experimental values were 1.2 times higher than the calculated values specified in the code, leading to the proposal of a revised equation for masonry considering stress-strain relationship, elastic modulus, Poisson's ratio, and compressive strength.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Chemistry, Physical
Michael Meistelman, Dan Meyerstein, Ariela Burg, Dror Shamir, Yael Albo
Summary: The reduction of nitrobenzene using ZVI@ORMOSIL and Ni(II)@ORMOSIL catalysts shows promising results in terms of catalytic efficiency and catalyst reusability. The color change of Ni(II)@ORMOSIL from green to black during the reduction process indicates its activation and potential for multiple reactions, making it a valuable tool for pollution remediation. This study introduces a new approach using M(II)@ORMOSIL pre-catalysts for in-situ reduction reactions, which could lead to the development of highly efficient and environmentally friendly catalysts.
Article
Engineering, Chemical
Airi Tago, Noriko Yamauchi, Kouichi Nakashima, Daisuke Nagao, Yoshio Kobayashi
Summary: A simple method has been developed to control the oxidation and aggregation of metallic particles, specifically metallic nickel particles in this study, through silica-coating. The oxidation of metallic particles was successfully controlled by the silica coating, and the Ni/SiO2 particles exhibited soft magnetic behavior at different annealing temperatures.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
A. J. Freitas Cabral, J. D. Pena Serna, Benjamin Rache Salles, H. S. Amorim, C. M. Rocha Rem, A. Miguel Novak
Summary: The polycrystalline nickel manganite prepared using a sol-gel method exhibits a spinel-type crystalline structure and shows some specific magnetic properties, including irreversibility and asymmetric hysteresis in magnetization curves.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Hafiz Muhammad Ahsan, Kanhya Lal, Murtaza Saleem, Ghulam M. Mustafa, Muhammad Ahmad Khan, Ahmed S. Haidyrah, Shahid Atiq
Summary: The synthesis of pure ZnO with nominal Mn and Co co-doping was conducted using a cost-effective wet chemical route to explore their dielectric response. Structural and morphological analysis showed the influence of Mn and Co doping on crystal structure and particle morphology in ZnO. The higher dielectric constant observed was attributed to the presence of oxygen vacancies generated during the process.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Penghua Ying, Xiaowen Li, Xiaobin Qiang, Yao Du, Jin Zhang, Lang Chen, Zheng Zhong
Summary: This paper investigates the mechanical behaviors of two-dimensional violet phosphorene (VP) nanosheets under uniaxial tension using first-principles calculations. It is found that VP undergoes a phase transformation under specific strain, resulting in unique properties such as anomalous Poisson effect and mechanical anisotropy. Moreover, the band gap of VP decreases with increasing strain.
MATERIALS TODAY PHYSICS
(2022)
Article
Physics, Condensed Matter
Shinji Nakagomi, Satoru Kaneko, Yoshihiro Kokubun
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2015)
Article
Physics, Applied
Yoshihiro Kokubun, Shohei Kubo, Shinji Nakagomi
APPLIED PHYSICS EXPRESS
(2016)
Article
Crystallography
Shinji Nakagomi, Shohei Kubo, Yoshihiro Kokubun
JOURNAL OF CRYSTAL GROWTH
(2016)
Article
Physics, Condensed Matter
Shinji Nakagomi, Yoshihiro Kokubun
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2016)
Article
Materials Science, Multidisciplinary
Shinji Nakagomi, Keisuke Hiratsuka, Yoshinori Kakuda, Kokubun Yoshihiro
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2017)
Article
Crystallography
Shinji Nakagomi, Yoshihiro Kokubun
JOURNAL OF CRYSTAL GROWTH
(2017)
Article
Materials Science, Multidisciplinary
Shinji Nakagomi, Toshihide Sakai, Kentaro Kikuchi, Yoshihiro Kokubun
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2019)
Article
Physics, Applied
Shinji Nakagomi, Toshihiro Momo, Syuhei Takahashi, Yoshihiro Kokubun
APPLIED PHYSICS LETTERS
(2013)
Article
Materials Science, Multidisciplinary
Shinji Nakagomi, Yoshihiro Kokubun
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2013)
Article
Physics, Condensed Matter
Shinji Nakagomi, Satoru Kaneko, Yoshihiro Kokubun
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2015)
Article
Chemistry, Analytical
Shinji Nakagomi, Tsubasa Sai, Yoshihiro Kokubun
SENSORS AND ACTUATORS B-CHEMICAL
(2013)
Article
Physics, Condensed Matter
Shinji Nakagomi, Takashi Yasuda, Yoshihiro Kokubun
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2020)
Article
Physics, Condensed Matter
Yoshihiro Kokubun, Shinji Nakagomi
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2020)
Article
Physics, Condensed Matter
Yoshihiro Kokubun, Masato Koyanagi, Shinji Nakagomi
Summary: The study found that heat treatment temperature and Li doping have significant effects on the structural properties of NiO epitaxial films, with undoped films showing increased lattice parameters and bandgap at higher treatment temperatures. Li doping reduces the increase in lattice parameter and bandgap observed at high heat treatment temperatures.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2021)