Article
Nanoscience & Nanotechnology
D. Anbuselvan, S. Nilavazhagan, A. Santhanam, N. Chidhambaram, K. Gunavathy, Tansir Ahamad, Saad M. Alshehri
Summary: Economically grown multifunctional zinc oxide nanoparticles were studied, along with Ni-doped ZnO nanoparticles, to investigate their ferromagnetic properties at room temperature. Structural and surface morphological features were analyzed using XRD and SEM, while diffused reflectance, photoluminescence, and FTIR spectroscopy were utilized to understand the effects of Ni doping. The presence of lattice defects and intense ferromagnetic properties in 3% Ni-doped ZnO nanoparticles were confirmed through experimental observations, suggesting their potential for spintronics device applications.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Lingqi Ren, Xiaodong Zhang, Xiaoli Du, Jianlu Wang, Lan Yu
Summary: Cu doping significantly reduces the electrical resistivity and enhances the conductivity of the material.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Ganapathi Bharathi, Devaraj Nataraj, Oleg Yu Khyzhun, Daniel T. Thangadurai, Kittusamy Senthilkumar, Murugaiyan Sowmiya, Ramasamy Kathiresan, Ponmalai Kolandaivel, Mukul Gupta, Deodatta Phase, Nirmalendu Patra, Shambhu Nath Jha, Dibyendu Bhattacharyya
Summary: A graphene system with opened energy bandgap and weak ferromagnetic behavior was prepared through a hydrothermal process, where graphene quantum dots (GQDs) were interconnected by iron (Fe) metal atoms. The interconnected solid sheets exhibited intrinsic optical absorption and photoluminescence properties, while retaining quantum behavior of the GQDs despite their micron size. The structural discontinuity around the metal atoms helped maintain the GQD behavior and the Fe atoms provided weak ferromagnetic behavior at room temperature.
APPLIED SURFACE SCIENCE
(2021)
Article
Physics, Multidisciplinary
Yu-Zhang Jiao, Dmitry V. Louzguine-Luzgin, Ke-Fu Yao, Zheng-Jun Zhang, Na Chen
Summary: In this study, a magnetic semiconductor with a high Curie temperature is presented for the development of spintronic devices in next-generation computing systems. The semiconductor exhibits low resistivity and high saturation magnetization at room temperature, and forms a heterojunction with p-type silicon, showing rectifying characteristics. These findings provide design principles for high Curie temperature magnetic semiconductors with determined conduction types, which are crucial for realizing nonvolatile spin-based transistors in information technology beyond Si-based systems.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2023)
Correction
Chemistry, Multidisciplinary
Yusen Qiao, Huabing Yin
Summary: This article presents a correction for the ferromagnetic and half-metallic phase transition in a one-dimensional narrow-bandgap W6PCl17 semiconductor through doping.
Article
Multidisciplinary Sciences
Yong Zhao, Baoshuang Shang, Bo Zhang, Xing Tong, Haibo Ke, Haiyang Bai, Wei-Hua Wang
Summary: This study demonstrates that a Ce-based metallic glass can transform into a hyperstable state and exhibit strong resistance against crystallization after long-term aging. The achieved hyperstable state is similar to that of million-year-aged amber, and the Ce-based metallic glass can reach equilibrium liquid state below T-g without crystallization.
Review
Physics, Multidisciplinary
Jing-Yang You, Xue-Juan Dong, Bo Gu, Gang Su
Summary: Magnetic semiconductors that function at room temperature are difficult to manufacture. Recent theoretical predictions have identified several 2D room-temperature magnetic semiconductors, including CrGeSe3, CrGeTe3/PtSe2 heterostructure, and technetium-based semiconductors (TcSiTe3, TcGeSe3, and TcGeTe3). The Curie temperature of these materials can be enhanced by external fields such as strain, heterostructures, and electric field. Additionally, suitable doping conditions have been proposed for diluted magnetic semiconductors, and Cr-doped GaSb and InSb are potential candidates for room-temperature magnetic semiconductors.
CHINESE PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Liqian Wu, Lizhe Liu, Jiajun Guo, Qiang Chen, Dunhui Wang
Summary: In this study, the introduction of oxygen into cobalt selenides through annealing in a controlled gas environment was successfully achieved to reveal the formation process of anion defects. The results showed that the annealed cobalt selenides exhibited significantly enhanced room-temperature ferromagnetism, mainly attributed to orbital hybridization induced by double-anion coordination (selenium and oxygen). This work provides new insight into the role of oxygen incorporation in magnetic structure transformation.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2022)
Article
Chemistry, Inorganic & Nuclear
Arwa I. A. Elsharawy, S. M. Yakout, M. A. Wahba, Ayman A. Abdel-Shafi, M. Sh Khalil
Summary: Notable ferromagnetic features were observed in lightly multidoped Cu0.97Mn0.01Fe0.01Ni0.01O composition at room temperature. The synthesized compositions showed a high purity mono-phase of monoclinic CuO structure with no other impurities. The incorporation of transition metals resulted in the formation of long absorption tails and red shifts in the band gap energy of CuO. Cu0.97Mn0.01Fe0.01Ni0.01O exhibited a perfect ferromagnetic performance with high saturation magnetization and coercivity at room temperature.
SOLID STATE SCIENCES
(2023)
Article
Chemistry, Physical
Shasha Sun, Jian Liang, Ruobai Liu, Wei Shen, Haijing Wu, Mingming Tian, Lulu Cao, Yutian Yang, Zhaocong Huang, Weiwei Lin, Jun Du, Zhenhua Ni, Yongbing Xu, Qian Chen, Ya Zhai
Summary: Chromium tellurides have unique properties that make them suitable for spintronic applications. The anisotropic magnetoresistance (AMR) behavior of ferromagnetic CrTe single crystal flakes shows promising potential for spintronics applications, with the AMR ratio increasing at lower temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Multidisciplinary
Suman Kumari, Mohd Anas, D. S. Raghav, Shital Chauhan, P. K. Siwach, Vivek Malik, H. K. Singh
Summary: We present a detailed study on the magnetotransport behavior of YBCO-SSMO superconducting-ferromagnetic composite thin films. The results show that the incorporation of ferromagnetic phase leads to a decrease in the critical temperature of the superconducting phase, a decrease in the slope of the normal state resistance-temperature curves, a decrease in the upper critical field and irreversibility field, and a reduction in hysteresis in the current-voltage characteristics.
Article
Multidisciplinary Sciences
Wei Hu, Chao Wang, Hao Tan, Hengli Duan, Guinan Li, Na Li, Qianqian Ji, Ying Lu, Yao Wang, Zhihu Sun, Fengchun Hu, Wensheng Yan
Summary: Embedding Cobalt atoms in graphene lattice can achieve robust room-temperature ferromagnetism, facilitated by the formation of square-planar Co-N-4 moieties and local magnetic moments provided by atomically dispersed Co atoms.
NATURE COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Zhicui Wang, Michang Zhang, Wenhui Wan, Yanfeng Ge, Yong Liu
Summary: A monolayer anti-ferromagnetic material, CrCl2, with a 1T' structure is reported in this study based on first-principle calculations. The material exhibits structural stability through lattice distortion and acts as an anti-ferromagnetic semiconductor with a bandgap of 2.03 eV. The study also reveals high anti-ferromagnetic coupling between nearest Cr atoms, and estimates a Neel temperature of 386 K for the material through Monte-Carlo simulations using the Heisenberg model. This two-dimensional material with intrinsic anti-ferromagnetism above room temperature shows promise for future nanoscale spintronics.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2023)
Article
Nanoscience & Nanotechnology
Zhiyan Jia, Wenjie Wang, Zichao Li, Rong Sun, Shengqiang Zhou, Francis Leonard Deepak, Chenliang Su, Ying Li, Zhongchang Wang
Summary: This study successfully demonstrates the controlled growth of ultrathin gamma-Fe2O3 nanoflakes with varying morphologies at different growth temperatures, showing room-temperature ferromagnetism and semiconducting properties. The morphology changes from triangular to polygonal shapes due to thermodynamic control, exhibiting different electrical conductivities.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Arseniy Buryakov, Pavel Avdeev, Dinar Khusyainov, Nikita Bezvikonnyy, Andreas Coclet, Alexey Klimov, Nicolas Tiercelin, Sergey Lavrov, Vladimir Preobrazhensky
Summary: In this article, the authors investigate the optically induced terahertz radiation in ferromagnetic FeCo layers of varying thickness on Si and SiO2 substrates. The study reveals that the thickness of the ferromagnetic layer and the material of the substrate significantly affect the generation efficiency and spectral characteristics of the THz radiation. The results emphasize the importance of accounting for the reflection and transmission coefficients of the THz radiation when analyzing the generation process. The observed radiation features correlate with the magneto-dipole mechanism triggered by the ultrafast demagnetization of the ferromagnetic material. This research contributes to a better understanding of THz radiation generation mechanisms in ferromagnetic films and may be useful for the further development of THz technology applications in the field of spintronics and other related areas. A key discovery of the study is the identification of a nonmonotonic relationship between the radiation amplitude and pump intensity for thin films on semiconductor substrates.
Article
Engineering, Electrical & Electronic
Y. Gao, W. A. Sasangka, C. V. Thompson, C. L. Gan
MICROELECTRONICS RELIABILITY
(2019)
Article
Engineering, Manufacturing
Nadeesh Singh Nobeen, Guangxu Yan, Chee Lip Gan, Zhong Chen
IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY
(2020)
Review
Radiology, Nuclear Medicine & Medical Imaging
C. L. Gan, Z. Yang, G. Salahia, S. Halpin, S. Nair
Summary: This retrospective study presents initial experience with the Flow Re-Direction Endoluminal Device (FRED) for treating aneurysms. The results indicate that FRED is a safe and effective flow diverter, with a high rate of complete aneurysm occlusion and low complication rate.
CLINICAL RADIOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Yue Wang, Wan Khai Loke, Yu Gao, Kwang Hong Lee, Kenneth Eng Kian Lee, Chee Lip Gan, Chuan Seng Tan, Eugene A. Fitzgerald, Soon Fatt Yoon
Summary: This article demonstrates the Ti/TiN/Al ohmic contact on InGaP/GaAs heterojunction bipolar transistors grown on 200-mm Si substrate, with achieved contact resistances and stable DC characteristics suitable for Si-CMOS integration and potential for hybrid III-V CMOS technology for 5G and mm-wave applications.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Materials Science, Ceramics
Zhangyi Huang, Li Ying Liu, Jianming Yuan, Huilu Guo, Haomin Wang, Pengcheng Ye, Zehui Du, Yida Zhao, Hao Zhang, Chee Lip Gan
Summary: In this study, Si3N4 cellular ceramics with a large thickness/length ratio were successfully prepared using highly viscous self-holding pastes and stereolithography 3D printing. The printed honeycombs and lattices exhibited structural defects and anisotropic surface roughness due to the high viscosity and low curing depth of the paste. The use of a lattice orientation at 45 degrees relative to the paste recoating direction reduced shear stress concentration and minimized structural defects. The resulting ceramics showed high compressive strength and specific compressive strength, surpassing that of similar density ceramics reported previously.
CERAMICS INTERNATIONAL
(2023)
Article
Multidisciplinary Sciences
Yuzhong Hu, Kaushik Parida, Hao Zhang, Xin Wang, Yongxin Li, Xinran Zhou, Samuel Alexander Morris, Weng Heng Liew, Haomin Wang, Tao Li, Feng Jiang, Mingmin Yang, Marin Alexe, Zehui Du, Chee Lip Gan, Kui Yao, Bin Xu, Pooi See Lee, Hong Jin Fan
Summary: The authors propose a bond weakening strategy for organic-inorganic hybrid piezoelectrics to improve their performance while maintaining mechanical softness. By introducing large-size halide elements, the metal-halide bonds can be weakened, resulting in improved piezoelectric constants and reduced polarization switching barrier.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Yu Shan Tay, Eric Jian Rong Phua, Zhong Chen, Chee Lip Gan
Summary: This study investigates the potential use of alumina particles as a catalyst and property enhancer in the polymerization of phthalonitrile. The results show that alumina fillers not only have a catalytic effect on the polymerization process but also improve the thermomechanical properties of the composite materials. The findings provide valuable insights into the application of alumina-filled phthalonitrile resins.
Article
Nanoscience & Nanotechnology
Rui A. Goncalves, Joanne W. K. Ku, Hao Zhang, Teddy Salim, Guodong Oo, Alfred A. Zinn, Chris Boothroyd, Richard M. Y. Tang, Chee Lip Gan, Yunn-Hwen Gan, Yeng Ming Lam
Summary: This study reports copper nanoparticle coatings with extremely fast and sustained antibacterial activity. Coating with cuprous oxide (Cu2O) nanoparticles and metallic copper nanoparticles on commonly used fabrics can kill bacteria within a short time, and both copper and Cu2O nanoparticles rapidly induce oxidative stress. Detailed physical and chemical analysis of the nanoparticles and the interaction between bacteria and the coated substrate help establish the parameters for achieving speedy and robust antibacterial properties in Cu2O-coated fabrics.
ACS APPLIED NANO MATERIALS
(2022)
Article
Engineering, Manufacturing
Terence Yan King Ho, Andrew Yun Ru Ng, Pengcheng Ye, Hui Teng Tan, Daniel Wen Hao Lock, Zehui Du, Chee Lip Gan
Summary: This study presents a novel SiO2/MgSO4 bilayer coating strategy to modify the surfaces of SiC particles, resulting in improved cure depth and densification of SiC ceramics. The obtained SiC ceramics showed high flexural strength and thermal conductivity, comparable to those achieved through post-infiltration processing. The research provides a pathway for 3D printing of various carbide ceramics facing similar challenges.
ADDITIVE MANUFACTURING
(2023)
Article
Multidisciplinary Sciences
Wangshu Zheng, Yan Shi, Lei Zhao, Shuangyue Jia, Linghai Li, Chee Lip Gan, Di Zhang, Qiang Guo
Summary: Small-scale shape memory ceramics integrated into a matrix material, such as cerium-doped zirconia reinforced aluminum composites, exhibit reversible phase transformations without causing destructive impact due to strong geometric confinement, robust interface, and particle network/force-chain configuration.
NATURE COMMUNICATIONS
(2023)
Article
Computer Science, Theory & Methods
Xiao Mei Zeng, Qing Liu, Jing Yun Tay, Chee Lip Gan
Summary: This study explores a new data retrieval approach using selective staining to differentiate 0 and 1 cells in EEPROM and Flash memory. With a specific staining process, the stained and non-stained cells can be characterized using microscopy, achieving 95% accuracy in data retrieval.
IEEE TRANSACTIONS ON INFORMATION FORENSICS AND SECURITY
(2022)
Article
Nanoscience & Nanotechnology
Zehui Du, Xinran Zhou, Pengcheng Ye, Xiaomei Zeng, Chee Lip Gan
ACS APPLIED NANO MATERIALS
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Yu Shan Tay, Jian Rong Eric Phua, Chee Lip Gan
2019 IEEE 21ST ELECTRONICS PACKAGING TECHNOLOGY CONFERENCE (EPTC)
(2019)
Article
Materials Science, Multidisciplinary
Pawan K. Kanaujia, Muhammad Azkhairy bin Ramezan, Xiu Yun Yap, Yujie Song, Zehui Du, Chee Lip Gan, Yee Cheong Lam, Chang Quan Lai
Article
Chemistry, Multidisciplinary
Yu Shan Tay, Eric Jian Rong Phua, Zhong Chen, Chee Lip Gan
Summary: Alumina particles are investigated as a potential catalyst for phthalonitrile polymerization and property enhancer. Chemical interactions between alumina fillers and phthalonitrile are observed, leading to improved performance and thermomechanical properties of the composite.
