Article
Nanoscience & Nanotechnology
Liwen Zhang, Xiaolong Ma, Yongyi Zhang, Philip D. Bradford, Yuntian T. Zhu
Summary: Short carbon nanotubes (CNTs) in the film structure tend to tightly bundle together, providing high CNT alignment and enhanced mechanical properties; while long CNTs are prone to bending and tangling, leading to reduced packing density and decreased mechanical performance of the film.
Article
Chemistry, Physical
Johann Tonhaeuser, Eyram Atiawotse, Ulrike Kuerpick, Rene Matzdorf
Summary: The structure of self-organized Au induced nanowires on Ge (001) was investigated using STM. Interruptions within the nanowires result in sections with lengths preferred multiples of the unit cell length. Occupied state STM images reveal internal structures with corresponding numbers of height maxima within the sections. The arrangement of the maxima varies depending on the section length and the positions of protrusions on neighboring wires.
Article
Chemistry, Multidisciplinary
Alexey A. Noyan, Yevgeniy A. Ovchenkov, Valery V. Ryazanov, Igor A. Golovchanskiy, Vasily S. Stolyarov, Eduard E. Levin, Kirill S. Napolskii
Summary: This study investigates the magnetic and superconducting properties of arrays of superconducting nanowires of different diameters and finds that the magnetic field configurations and critical fields vary with the diameter.
Article
Chemistry, Physical
Mikelis Marnauza, Robin Sjokvist, Sebastian Lehmann, Kimberly A. A. Dick
Summary: Environmental transmission electron microscopy is used to study the growth of Au nanoparticle seeded GaSb nanowires in situ. It is found that the precursor V/III ratio affects the morphology, composition, and diameter of the nanowires. The observed trends can be reproduced in a conventional exsitu system, highlighting the transferability and importance of the results obtained in situ.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Biochemistry & Molecular Biology
Mengchen Zhao, Shuji Fujisawa, Tsuguyuki Saito
Summary: We report the basic sheet properties of divalent phosphorylated cellulose nanofibers (CNFs) with different phosphorus contents and counterion types. The counterion exchange from sodium ions to calcium or aluminum ions greatly enhances all examined sheet properties of CNF sheets. The phosphorus content only has significant influences on conditioned tensile and fire-retardant properties. Compared to CNF sheets with monovalent carboxy groups, CNF sheets with divalent phosphate groups are superior in terms of wet tensile properties and fire-retardant properties.
Article
Chemistry, Physical
Camino Martin-Sanchez, Ana Sanchez-Iglesias, Paul Mulvaney, Luis M. Liz-Marzan, Fernando Rodriguez
Summary: The effects of nonhydrostatic pressure on the morphology and stability of gold nanorods and nanospheres were studied. It was found that solvent solidification had a negligible effect on nanospheres, while nanorods were broken into smaller particles under nonhydrostatic conditions. However, colloidal stability was maintained in all cases.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Zhaoxin Zhong, Biao Zhang, Yuhan Ren, Jian Ye, Jiawei Zhang, Feng Ye
Summary: In this study, bioinspired web-liked multiphase composites were successfully constructed using boron-modified polysilazane polymer. The composites consisted of long TiB nanowires as 'web' and hybrid TiC and Ti3Si particles as 'nodes'. The enhanced strength of these composites was attributed to the synergistic load transfer of the hybrid reinforcements. This study provides a promising design approach for developing high-performance composites with high reinforcement content, utilizing polymer instead of traditional ceramic powder.
MATERIALS CHARACTERIZATION
(2024)
Article
Engineering, Electrical & Electronic
Bharti Sharma, Ram Mehar Singh, Avshish Kumar, Sushil Kumar
Summary: The present work investigates the influence of diameter on the properties of nickel nanowire arrays. Various characterization techniques, such as FESEM, EDX, XRD, VSM, and UV-visible absorption spectroscopy, were employed to analyze the morphology, elemental composition, crystal structure, magnetic behavior, and optical properties of the nanowires. The field emission behavior of the nanowire arrays was also studied.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
Yutao Zhang, Yahui Li, Haijian Wen, Leitao Cao, Wenxin Xiao, Jintao Zhao, Zeyuan Nan, Suxia Zhang, Song Qiu, Qingwen Li
Summary: This study presents a novel method based on electrochemical shortening and selective adsorption to precisely control the length and distribution of single-walled carbon nanotubes (SWCNTs). Experimental results reveal that SWCNTs with smaller diameters are more prone to truncation, resulting in shorter lengths. Remarkably, a length-dependent fluorescence enhancement was observed when the length of semiconducting-SWCNTs (s-SWCNTs) was reduced to below 120 nm. This research lays the foundation for further exploration of length-dependent properties and applications of s-SWCNTs.
Article
Polymer Science
Thomas Hoeftberger, Florian Dietrich, Gernot Zitzenbacher, Christoph Burgstaller
Summary: The fiber length and mechanical properties of short-carbon-fiber-reinforced polypropylene are influenced by processing factors such as residence time and fiber content. Increasing fiber content and decreasing residence time in compounding results in shorter fibers and improved tensile strength, elastic modulus, and impact strength.
Review
Chemistry, Multidisciplinary
Vittorio Scardaci
Summary: Copper nanowires exhibit high electrical conductivity but are vulnerable to oxidation, requiring strategies to prevent it.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Physical
George Kalosakas, Nektarios N. Lathiotakis, Konstantinos Papagelis
Summary: The mechanical response of graphene nanoribbons under uniaxial tension, as well as its dependence on the nanoribbon width, is explored through numerical simulations. Results obtained through different theoretical approaches are compared, and various elastic parameters are calculated to show their variation with the width of the nanoribbon.
Article
Chemistry, Physical
Zexi Liu, Quanzheng Deng, Lu Han, Shunai Che, Yingying Duan
Summary: Photomagnetic-chiral anisotropy (PM-ChAC-E) and surface-enhanced Raman scattering chiral anisotropy (SERS-ChAC-E) are novel enantiomeric discrimination techniques based on the chiroptical response between chiral nanostructured metal films (C) and enantiomers (E). The discrimination mechanism of chiral nanostructured Au films (CNAFs) is explained through the spin polarization coupling (SPC) between the enantiomers and CNAFs. The findings provide a possible mechanism based on spin selectivity in chiral structures and offer a universal theory for enantiomeric discrimination.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Lotan Portal, Iryna Polishchuk, Maria Koifman Khristosov, Alexander Katsman, Boaz Pokroy
Summary: Dislocations in metals significantly impact their hardness and strength, leading to local chemical corrosion and reactivity. A unique autocatalytic mechanism was discovered in which inorganic semiconducting gold(I) cyanide nanowires form within preexisting dislocation lines in a plastically deformed Au-Ag alloy, with the growth of the nanowires being dependent on the presence of catalytic dislocation outcrops.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Chemistry, Multidisciplinary
Yang Xin, Petteri Piskunen, Antonio Suma, Changyong Li, Heini Ijas, Sofia Ojasalo, Iris Seitz, Mauri A. Kostiainen, Guido Grundmeier, Veikko Linko, Adrian Keller
Summary: The internal design of DNA nanostructures plays a crucial role in determining their behavior in different environments. Crossover design can optimize the performance and stability of these structures, particularly in biomedical applications.
Article
Materials Science, Multidisciplinary
Yibo Ren, Ying Han, Shun Yan, Jiapeng Sun, Zhenxin Duan, Hua Chen, Xu Ran
Summary: Different powder metallurgical Ti-48Al-2Cr-2Nb compacts were prepared with varying microstructures. The compact with a bimodal grain structure showed a good combination of high compressive strength and improved compression ratio at room temperature, but exhibited different deformation behaviors at high temperatures.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Materials Science, Multidisciplinary
Bingqian Xu, Jiapeng Sun, Jing Han, Zhenquan Yang, Hao Zhou, Lirong Xiao, Songsong Xu, Ying Han, Aibin Ma, Guosong Wu
Summary: Hierarchical precipitates composed of various phases in a fine-grain magnesium-gadolinium-silver alloy obtained through ECAP and subsequent peak-aging process facilitate corrosion to some extent, but their spatial redistribution improves the material's corrosion resistance possibly due to the formation of a protective corrosion product film.
Article
Nanoscience & Nanotechnology
Zhenquan Yang, Aibin Ma, Bingqian Xu, Jinghua Jiang, Haoran Wu, Jiapeng Sun
Summary: The novel stepless-temperature-reduction ECAP approach demonstrates advantages in microstructure refining and texture modifying of Mg-Al alloys, resulting in ultrafine grain structure and high tensile yield strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Lian Hua, Jiapeng Sun, Guosong Wu
Summary: A facile strategy is proposed in this study to control the corrosion behavior of hydrothermally-treated magnesium-aluminum alloys, and aging treatment is attempted to modify their metallurgical microstructure. After hydrothermal treatment, both the unaged and the aged alloy have a layer of dense coating, but the aged alloy shows better corrosion resistance.
Article
Materials Science, Multidisciplinary
Jianqing Chen, Yehan Su, Qiyu Zhang, Jiapeng Sun, Donghui Yang, Jinghua Jiang, Dan Song, Aibin Ma
Summary: A homogeneously ultrafine-grained (UFG) Cu-38 Zn alloy with an average grain size of 0.64 μm was successfully fabricated by equal channel angular processing (ECAP), exhibiting a significantly enhanced strength-ductility synergy. The observed strength enhancement can be attributed to grain refinement and dislocation strengthening. After annealing, the alloy showed further improved strength with almost unchanged ductility, which is associated with solute/impurity segregation and precipitation phenomena inside the grains.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Jing Han, Cong Wang, Yuanming Song, Zhiyuan Liu, Jiapeng Sun, Jiyun Zhao
Summary: The ultrasonic surface rolling (USR) technique has been used to improve the corrosion resistance and mechanical properties of Mg alloy casting parts. The USR sheet exhibits significant enhancements in strength, hardness, and corrosion resistance without sacrificing ductility. This method can be considered as an additional and last working procedure in the production of high-performance Mg alloy casting parts.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Xinran Yao, Yujie Yang, Minxing Zheng, Jinghong Wang, Changyang Liu, Jiapeng Sun, Guosong Wu
Summary: This study proposes a strategy to enhance the corrosion resistance of magnesium alloys by transforming corrosion products into protective coatings. By immersing a magnesium-neodymium alloy in potassium dihydrogen phosphate solution, a uniform MgHPO4·3H2O coating is formed, which significantly improves the corrosion resistance of the alloy.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Bangjun Li, Jiapeng Sun, Bingqian Xu, Guosong Wu
Summary: This paper investigates the corrosion behavior of Mg-5.7Gd-1.9Ag alloy sheets in a salt solution. The results show that the rolled sheets exhibit better corrosion resistance compared to the as-cast sheets. Aging treatment decreases corrosion resistance, but it still remains higher than that of the as-cast sheets. The migration of corrosion is mainly influenced by the evolution of second phases rather than grain size and texture.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Mingkun Jiang, Ying Han, Jiapeng Sun, Guoqing Zu, Weiwei Zhu, Yu Zhao, Hua Chen, Xu Ran
Summary: In this study, different microscopic techniques were used to characterize the precipitation behavior of the Cu-rich phase in Al-free and Al-containing ferrite stainless steels. The effects of Al addition on the precipitation and coarsening of the Cu-rich phase were analyzed. The results showed that Al increased the nucleation rate of the Cu-rich phase and refined the Cu-rich nanoprecipitates. The crystal structures of the Cu-rich phase changed after Al addition. The Al-containing Cu-rich phase had high-density edge dislocations, which acted as diffusion channels and increased the coarsening rate of the Cu-rich phase. However, with the extension of the aging time, the dislocation density in the Al-containing Cu-rich phase decreased, weakening the promotion effect of Al on the coarsening of the Cu-rich phase.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
Qisheng Sun, Jiapeng Sun, Yantao Fu, Bingqian Xu, Ying Han, Jianqing Chen, Jing Han, Hao Wu, Guosong Wu
Summary: In this study, a thick GS surface layer with a thickness of 1.1 mm was successfully produced in Cu-38 wt.% Zn alloy using ultrasonic severe surface rolling technology. The results show that the volume fraction of the GS surface layer can be tailored to achieve a balance between strength and ductility in the alloy.
Article
Materials Science, Multidisciplinary
Jiapeng Sun, Qisheng Sun, Ying Liu, Bangjun Li, Zheng Zhang, Bingqian Xu, Songsong Xu, Ying Han, Yanxin Qiao, Jing Han, Guosong Wu, Paul K. Chu
Summary: The study investigates the use of ultrasonic severe surface rolling (USSR) to enhance the corrosion resistance of SLM 316L stainless steel, and finds that the USSR processed samples exhibit significant improvement in corrosion resistance, attributed to the unique gradient structure and chemically homogeneous and high-quality surface.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Changyang Liu, Jiapeng Sun, Guosong Wu
Summary: A simple solution-immersion method based on the concept of predesigned corrosion is developed to enhance the corrosion resistance of a magnesium-neodymium alloy, providing a feasible way to prepare a superhydrophobic surface on the alloy. The superhydrophobic surface exhibits self-cleaning behavior and good corrosion resistance in artificial hand sweat, offering new technical insights into the corrosion protection of magnesium alloys.
Article
Materials Science, Multidisciplinary
Qisheng Sun, Jiapeng Sun, Jing Han, Guosong Wu
Summary: Designing a gradient nanostructure is an effective strategy to strengthen commercial pure Ti without sacrificing ductility. This study investigates the corrosion behavior of GNS pure Ti in hydrochloric acid and finds that GNS pure Ti exhibits enhanced corrosion resistance and passivation ability due to high-density grain boundaries, dislocations, and a smooth surface.
Article
Materials Science, Multidisciplinary
Jiapeng Sun, Bingqian Xu, Zhenquan Yang, Feihu Jiang, Keke Yang, Jing Han, Guosong Wu
Summary: A hierarchal micro-nano beta phase framework is proposed to improve the barrier effect of the second phase in high-aluminum-containing Mg-Al alloy, which effectively mitigates corrosion due to the formation of a brick-and-mortar structured corrosion product layer.
Article
Materials Science, Multidisciplinary
Bangjun Li, Jiapeng Sun, An Xu, Bingqian Xu, Lingling Wang, Jie Yuan, Guosong Wu
Summary: It is still challenging to simultaneously improve the mechanical properties and corrosion resistance of Mg alloys through one strategy. In this paper, high-density nanoprecipitates are introduced in a Mg alloy to enhance its strength and corrosion resistance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)