Article
Materials Science, Multidisciplinary
Yonghua Sun, Youjie Rong, Ya Zhao, Yuyu Zhao, Ruiqiang Hang, Xiaohong Yao, Paul K. Chu
Summary: The electrochemical stability of Ni-Ti-O nanoporous layers grown on equiatomic NiTi alloy was assessed by immersion in water and phosphate buffered saline, showing no significant change in morphology, composition, and structure even after 60 days. The layers also exhibited retained corrosion resistance, antibacterial ability, and cytocompatibility, indicating their potential as coatings on NiTi biomedical implants.
Article
Materials Science, Multidisciplinary
Yonghua Sun, Yuyu Zhao, He Zhang, Youjie Rong, Runhua Yao, Yi Zhang, Xiaohong Yao, Ruiqiang Hang
Summary: Zn-incorporated Ni-Ti-O NP layers exhibit excellent corrosion resistance, antibacterial ability, and osteogenic activity, showing great potential as biomedical coatings for NiTi-based implant materials.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Yan-Lian Liu, Yong-Hua Sun, Ya Zhao, Chun-Lin Li, Fei-Long Zhao, Xiao-Hong Yao, Rui-Qiang Hang, Paul K. Chu
Summary: This study aimed to endow NiTi alloy with anticancer and antibacterial abilities through surface modification. The Ni-Ti-O nanoporous layer demonstrated good performance in inhibiting cancer cell growth and killing bacteria, while showing minimal adverse effects on normal cells, due to the larger amount of Ni ions leached in the acidic microenvironment of cancer cells compared to normal cells. The nanoporous layers show promise as coatings on NiTi stents to prevent re-obstruction after surgery.
Article
Materials Science, Multidisciplinary
Meng Zhang, Jie Gao, Xiaobo Huang, Yong Ma, Bing Zhou, Zhubo Liu, Yanpeng Xue, Shengwang Yu, Yucheng Wu
Summary: The anodizing behavior of Ta/Ti6Al4V alloy layer in fluoride-containing ethylene glycol electrolyte was investigated. By adjusting the anodization conditions, the morphology and characteristics of Ta-Ti-O nanotube arrays/nanopore arrays on the surface can be controlled. The Ta/TC4 alloy showed superior corrosion resistance in DMEM solution compared to TC4, but the corrosion resistance of Ta-Ti-O NTAs was deteriorated due to the large specific surface area and massive lamellar gaps.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Yong-Hua Sun, Ya Zhao, Yu-Yu Zhao, You-Jie Rong, Run-Hua Yao, Xiao-Hong Yao, Rui-Qiang Hang, Paul K. Chu
Summary: An electropolishing pretreatment was conducted on NiTi substrates to expose Ni-Ti-O NPs, which effectively removed the top disordered layer to enhance corrosion resistance and biological functions of the NPs. This study suggests that EP is a desirable pretreatment before anodization of NiTi alloys.
Article
Materials Science, Coatings & Films
Kako Yamasaki, Hiroki Taniho, Kasumi Tate, Naofumi Ohtsu
Summary: Pulsed voltage can assist in obtaining a Ni-free TiO2 layer, H2SO4 contributes to the formation of grooved surface layers, and HNO3 promotes the growth of the thickest layer.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Go Kawamura, Irna Puteri Binti Shahbudin, Wai Kian Tan, Taichi Goto, Yuichi Nakamura, Mitsuteru Inoue, Hiroyuki Muto, Kazuhiro Yamaguchi, Aldo R. Boccaccini, Atsunori Matsuda
Summary: This paper presents a novel process for fabricating multiferroic nanocomposite films and demonstrates a magnetoelectric effect in a BaTiO3-CoFe2O4 nanotube array-based structure, attributed to strain transfer between the two components.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Hryhorii Makarov, Leonid Satrapinskyy, Marek Vidis, Tomas Roch, Gustav Plesch, Marian Mikula
Summary: This study introduces a method for growing titanium molybdenum oxide (TMO) nanotubes directly from a metallic precursor solid state solution and provides their structural and chemical characterization. Precursor films with molybdenum content ranging from 32 to 82 at% were prepared using co-deposition magnetron sputtering. By optimizing the deposition parameters, a continuous nanotube array with a length of up to 700 nm +/- 10% was grown through anodic oxidation.
Article
Materials Science, Ceramics
Alberto Z. Fatichi, Mariana G. de Mello, Karina D. Pereira, Luisa G. M. Antonio, Augusto D. Luchessi, Rubens Caram, Alessandra Cremasco
Summary: The electrochemical, structural, and biological properties of self-organized amorphous and anatase/rutile titanium dioxide (TiO2) nanotubes deposited on Ti-35Nb-4Zr alloy through anodization-induced surface modification were investigated. The study found that anatase TiO2 exhibited higher surface corrosion resistance and cell viability compared to amorphous TiO2, indicating the importance of TiO2 nanotube crystallization in the material's electrochemical behavior and biocompatibility.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Peng Li, Shuxin Dai, Dan Dai, Zhiming Zou, Renda Wang, Ping Zhu, Kun Liang, Fangfang Ge, Feng Huang
Summary: Diverse microstructures of Ti films were created via magnetron sputtering under controllable parameters, followed by anodization in an ethylene glycol-based electrolyte. The relationship between the micro-structures of Ti films and the resulting TiO2 layers was analyzed, with film density identified as the key microstructure affecting the formation of TiO2 nanotube arrays (TNTs). The electron aggregation theory explained why denser Ti films facilitate TNTs formation, and confirmatory experiments were performed to validate this theory.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Materials Science, Coatings & Films
S. A. Mousavi, A. Moshfeghi, F. Davoodian, E. Salahinejad
Summary: Anodizing nitinol alloy in a two-stage process (static and stirred electrolyte) can remove irregular surface arrays while achieving thick nanopores, with the static electrolyte providing controlled thickness and the stirred electrolyte reducing irregularity. This method results in nanopores with almost 40 nm in diameter and 11 μm in layer thickness, making it suitable for applications requiring higher surface areas.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Zhi-Jia Zhang, Jun Zhao, Zhi-Jun Qiao, Jia-Min Wang, Shi-Hao Sun, Wen-Xing Fu, Xi-Yuan Zhang, Zhen-Yang Yu, Yu-Hai Dou, Jian-Li Kang, Ding Yuan, Yue-Zhan Feng, Jian-Min Ma
Summary: TiO2 nanotube arrays were synthesized on three-dimensional porous Ti membrane using a facile method, with the length of arrays tunable by anodizing time. The resulting TiO2 nanotube arrays/porous Ti electrode showed high cycling stability and specific capacity at 8 h anodizing time, making them promising for high-performance anode materials in next-generation energy storage systems. The novel nanotube arrays@3D porous architecture shortened electron/ion transmission path effectively, paving the way for optimizing design of anode materials.
Article
Nanoscience & Nanotechnology
K. N. Chaithanya Kumar, Atharva Pagare, H-G Brokmeier, M. Sankar, Nobert Schell, K. S. Suresh
Summary: The in-situ deformation of Ni rich NiTi shape memory alloy was characterized using synchrotron diffraction. The study found that applied stress affects the texture of material and restricts the stress induced martensitic transformation. A strong lattice correspondence between the austenite and martensite phases along with a strong variant selection was observed.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Sajad Arjmand, Gholam Hossein Akbari, Gholam Reza Khayati
Summary: This study aimed to improve the surface micro-hardness and corrosion resistance of pure Ti by fabricating in-situ Ni/Ni3Ti-NiTi-Fe2Ti-beta Cr2Ti composite using TIG process and Inconel 718 filler alloy. Results showed the formation of different phases within a specific range of heat inputs, with increased hardness and corrosion resistance observed as heat input increased.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Biomaterials
Ya Zhao, Zhong Wang, Long Bai, Feilong Zhao, Si Liu, Yanlian Liu, Xiaohong Yao, Ruiqiang Hang
Summary: Nanospindles composed of TiO2 and Ti4Ni2O were constructed to improve hydrophilicity and reduce Ni ion release, promoting endothelial regeneration and regulating inflammatory responses.
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
(2021)
Review
Engineering, Biomedical
Babak Mehrjou, Yuzheng Wu, Pei Liu, Guomin Wang, Paul K. Chu
Summary: The emergence of antibiotic-resistant pathogens poses serious health issues. There is a global effort to find new methods to treat infections and develop better antibacterial materials and therapies. Non-biological methods and biomimetic patterns show potential for antimicrobial effects. This review summarizes recent advances in the application of chemical and biological approaches to combat bacterial infection and antibiotic resistance.
ADVANCED HEALTHCARE MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Yafei Han, Liehu Cao, Guangfeng Li, Fengjin Zhou, Long Bai, Jiacan Su
Summary: The current traditional methods for treating bone and cartilage defects are not ideal, necessitating the need for innovative approaches. Nucleic acid nanotechnology, with its ability to form discrete structures and perform specific functions at the nanoscale, has garnered significant attention. The advantages of nucleic acid nanotechnology in in-cell and in vivo applications offer great potential for advancing the field of biomaterials. This review summarizes the current abilities of nucleic acid nanotechnology in bone and cartilage regeneration and provides insights into the challenges and future directions for its development.
Article
Nanoscience & Nanotechnology
Wanying Zhang, Madiha Rafiq, Jingcheng Lu, Abebe Reda Woldu, Jianhong Zhou, Hong Xia, Paul K. Chu, Liangsheng Hu, Fushen Lu
Summary: Direct methanol fuel cells (DMFCs) are a viable alternative for portable applications due to their high energy density, easy implementation, low operating temperature, and convenient methanol fuel storage. However, the widespread use of DMFCs is hindered by barriers such as high cost and low durability of noble metal-based catalysts. Nickel-based electrocatalysts, with their low price, high durability, and remarkable surface oxidation properties, can potentially replace expensive noble metal catalysts.
Article
Chemistry, Physical
Chengfeng Xiong, Yu Wang, Liangliang Lin, Ming Gao, Yifan Huang, Paul K. Chu
Summary: Nanocomposite coatings based on aluminum nitride and siloxane matrix were deposited on polyimide films by atmospheric pressure plasma, leading to improved thermal conductivity. The evolution of the coatings upon deposition time variations was systematically investigated. After 6 minutes of deposition, the surface energy of the PI film was improved to 32.8 mJ/m2, and the thermal conductivity was enhanced to 1.68 W/mK with a coating hardness of 2H. The results demonstrate the efficient modification of flexible materials with improved thermal conductivity using plasma-deposited nanocomposite coatings.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Shuai Feng, Donglian Li, Hao Dong, Song Xie, Yaping Miao, Xuming Zhang, Biao Gao, Paul K. Chu, Xiang Peng
Summary: In this study, MoO2/Mo2N heterostructures were prepared by regulating the coordination of Mo atoms. The electrocatalyst exhibits high current density and excellent stability for hydrogen evolution reaction.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Shuyu Fan, Yinong Chen, Shu Xiao, Kejun Shi, Xinyu Meng, Songsheng Lin, Fenghua Su, Yifan Su, Paul K. Chu
Summary: Graphene coatings are promising solid lubrication materials due to their mechanical properties. This study presents a new method for in situ deposition of high-quality graphene coatings on hard substrates using NiCo solid solution and competitive reaction strategies. The graphene coating deposited on substrates with deep NiCo solid solution demonstrates superior low-friction and durability.
Article
Engineering, Environmental
Zanling Huang, Abebe Reda Woldu, Xiang Peng, Paul K. Chu, Qing-Xiao Tong, Liangsheng Hu
Summary: It has been found that adding Fe ions into alkaline electrolytes can enhance the oxygen evolution reaction (OER) activity of Ni-based catalysts. Experimental analysis reveals that Fe(III) can promote OER kinetics through two approaches, leading to improved performance and stability in electrochemical water splitting.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Physics, Multidisciplinary
Debao Wang, Jingwei Lv, Wei Liu, Yanru Ren, Wei Li, Xinchen Xu, Chao Liu, Paul K. Chu
Summary: In this study, a hybrid metal-dielectric nanoantenna is designed and analyzed, showing flexibility in exciting and manipulating the anapole modes and improving the near-field enhancement. The nanoantenna also demonstrates great performance in optical sensing.
Article
Optics
Ning Sheng, Haihao Fu, Tongyu Meng, Jianxin Wang, Wei Liu, Jingwei Lv, Zao Yi, Lin Yang, Paul K. Chu, Chao Liu
Summary: This paper studies the influence of SiO2 and four new optical materials on the OAM mode characteristics in orbital angular momentum (OAM) photonic crystal fibers (PCFs) for more efficient communication. The properties of OAM modes transmitted in the five materials, such as effective index difference, dispersion, confinement loss, etc., are derived using the finite element method. Universal rules for optimizing PCF in the future to improve the efficiency of optical fiber communication are obtained through in-depth analysis.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2023)
Article
Optics
Lu Xue, Xinzhi Sheng, Qiyuan Mu, Depeng Kong, Zhaojin Wang, Paul K. Chu, Shuqin Lou
Summary: In this study, a high-birefringence and low-loss terahertz hollow-core anti-resonant fiber was designed and numerically analyzed. Numerical analysis showed that the fiber achieved a birefringence of 10-2 in the transmission window of 0.21 to 0.35 THz, with the highest birefringence of 4.61 x 10-2 at 0.21 THz and a loss of 0.15 cm-1. Experimental results using 3D printing and THz time-domain spectroscopy confirmed the high birefringence of 2.17 x 10-2 to 3.72 x 10-2 and low loss of 0.12 to 0.18 cm-1 in the 0.2 to 0.27 THz transmission window. The highest birefringence was 3.72 x 10-2 at 0.22 THz, with a corresponding loss of 0.18 cm-1. This THz hollow-core anti-resonant fiber exhibits higher birefringence and relatively lower loss compared to recent similar fibers reported.
Article
Chemistry, Applied
Zanling Huang, Shuqi Zhu, Yuan Duan, Chaoran Pi, Xuming Zhang, Abebe Reda Woldu, Jing-Xin Jian, Paul K. Chu, Qing-Xiao Tong, Liangsheng Hu, Xiangdong Yao
Summary: In this study, it was found that Ni sites act as a host to attract Fe(III) to form Fe(Ni)(III) binary centers, which promote the oxygen evolution reaction (OER) activity and stability by cyclical formation of intermediates. Additionally, other ions can also catalyze the OER process on different electrodes.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Physics, Applied
Wei Li, Debao Wang, Tongyu Meng, Wei Zhou, Jingwei Lv, Lin Yang, Wei Liu, Yan Lv, Yu Wang, Paul K. Chu, Chao Liu
Summary: A hybrid metal-dielectric nanoparticle composed of a gold dimer and silicon-silica is designed and analyzed using the finite element method (FEM) to explore the strong coupling between the combined plasmonic mode and anapole mode. Theoretical simulation shows that the nanoparticle achieves an enhanced electric field enhancement of 640 and exhibits unidirectional scattering with almost zero backscattering at multiple wavelengths in the far-field region. Additionally, the composite nanoparticle exhibits a high Purcell factor of 12,193 and sensitivity of 610nm/RIU, surpassing that of single-metal or dielectric nanoparticles.
MODERN PHYSICS LETTERS B
(2023)
Correction
Materials Science, Biomaterials
Xiuhua Wang, Lei Tan, Xiangmei Liu, Zhenduo Cui, Xianjin Yang, Kelvin W. K. Yeung, Paul K. Chu, Shuilin Wu
BIOMATERIALS SCIENCE
(2023)
Article
Electrochemistry
Hanxue Zhao, Mai Li, Jintao Du, Yuhang Lei, Ayesha Irfan, Muhammad Imran, Chunrui Wang, Jun He, Zhongyi Sun, Paul K. Chu
Summary: Porous carbon derived from metal-organic frameworks (MOFs) is synthesized to form a three-dimensional structure of conductive porous carbon nanoflakes (CPCN) with unique structural characteristics and conductivity. Incorporation of nanoscale CdSe particles as energy-storage materials into CPCN results in a flexible electrode for sodium-ion supercapacitors. The CdSe/CPCN@CC electrode exhibits high specific capacitance and excellent cycling stability, making it suitable for flexible and wearable applications.
ELECTROCHIMICA ACTA
(2023)
Article
Materials Science, Ceramics
Yixiong Gao, Shu Xiao, Hao Wu, Chunming Wu, Guohua Chen, Yansheng Yin, Paul K. Chu
Summary: This study aims to enhance the performance of micro-arc oxidation (MAO) coatings by integrating hexagonal boron nitride (h-BN) nanoparticles. The results show that h-BN integration reduces porosity and roughness, while improving hardness, adhesion, corrosion resistance, and wear resistance.
CERAMICS INTERNATIONAL
(2023)
