Review
Materials Science, Multidisciplinary
Sidi Fan, Rui Cao, Lude Wang, Shan Gao, Yupeng Zhang, Xiang Yu, Han Zhang
Summary: Quantum tunneling with band-structure engineering has been successfully developed for applications in electrical, optoelectrical, and magnetic devices. Devices based on 2D van der Waals heterostructures offer superior tunneling performance and scaling down device size. The research on 2D tunneling devices is in its early stages, but they are expected to emerge as competitive candidates for low-power and high-speed devices.
SCIENCE CHINA-MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Gwangwoo Kim, Seunguk Song, Deep Jariwala
Summary: This article provides an overview of recent advances in the growth of 2D quantum heterostructures, which enable the realization of controlled positions and dimensions for 2D lateral/vertical heterostructures while minimizing defects across the heterointerfaces.
MATERIALS RESEARCH LETTERS
(2023)
Article
Chemistry, Physical
Lin Li, Jichen Dong, Dechao Geng, Menghan Li, Wei Fu, Feng Ding, Wenping Hu, Hui Ying Yang
Summary: This study demonstrates for the first time that interface-driven anisotropic etching mode can be widely applied to 2D heterostructures. By accurately tuning etching conditions, a series of etched 2D heterostructures patterns are controllably produced, providing a method for fabricating ordered and complex 2D oriented heterostructures.
Review
Chemistry, Multidisciplinary
Nasir Shehzad, Shahzad Saeed, Ismail Shahid, Imad Khan, Imran Saeed, Juan Antonio Zapien, Lixin Zhang
Summary: Two-dimensional van der Waals heterostructures with tunable band alignment have the potential to be beneficial for the development of minimal multi-functional and controllable electronics. Controlling the band alignment in semiconducting vdWHs is crucial for determining the electronic and optoelectronic properties.
Article
Physics, Applied
Jee Yung Park, Yoon Ho Lee, Hyojung Kim, Letian Dou
Summary: Two-dimensional (2D) perovskites have attracted attention due to their optoelectronic properties, tunability, and stability. Methods for synthesizing high quality 2D perovskite single crystals and fabricating heterostructures have been developed. 2D perovskites have shown potential as building blocks for heterostructures, leading to unique physical properties. Semiconductor devices based on 2D perovskite single crystal heterostructures have been studied, with capabilities such as interlayer excitons and enhanced electronic properties. Novel perspectives, including metal-2D material contacts, dry transfer techniques, ion diffusion studies, and nanocrystal array fabrication, offer opportunities for further exploration and development of 2D perovskite heterostructure devices.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Paul Nguyen, Natalie C. Teutsch, Nathan P. Wilson, Joshua Kahn, Xue Xia, Abigail J. Graham, Viktor Kandyba, Alexei Barinov, Xiaodong Xu, David H. Cobden, Neil R. Wilson
Summary: In this study, spatially resolved angle-resolved photoemission spectroscopy was used to monitor band structure changes in van der Waals heterostructures induced by electric fields. The results show that applying a gate voltage can shift the semiconductor bands relative to those in graphene by up to 0.2 eV.
Review
Chemistry, Physical
Jiaojiao Ma, Kaiwen Guan, Yu Jiang, Yang Cao, Sheng Hu
Summary: Research on two-dimensional materials has provided insights into the low-dimensional science and the investigation of physical and chemical processes under two-dimensional confinement. The discoveries in this field have expanded our understanding of nano-science and stimulated the development of potential applications.
Article
Chemistry, Multidisciplinary
Chengyu He, Jing Li, Yanan Bao, Jianliang Li, Hengshan Wang, Mingqun Zhang, HuaFeng Li, Huayi Tang, Zhiguang Sun, Qi Zhang, Yurui Fang, Jiao Xu, Yiming Yang
Summary: A vapor-phase anion exchange method is developed to prepare robust 2D Ruddlesden-Popper perovskite heterostructures. Different diffusion behaviors of anions are observed depending on the specific organic cations, and the diffusion coefficients are calculated to reveal the anisotropic diffusion characteristics.
Article
Chemistry, Multidisciplinary
Akshay Wali, Shamik Kundu, Andrew J. Arnold, Guangwei Zhao, Kanad Basu, Saptarshi Das
Summary: Reverse engineering is a major security threat in the semiconductor industry, with camouflaging techniques used to thwart such threats. Existing camouflaging methods involve transformable interconnects and covert gates. Emerging solutions like polymorphic gates and FETs show promise but come with area overhead.
Review
Chemistry, Multidisciplinary
Sharafadeen Gbadamasi, Md Mohiuddin, Vaishnavi Krishnamurthi, Rajni Verma, Muhammad Waqas Khan, Saurabh Pathak, Kourosh Kalantar-Zadeh, Nasir Mahmood
Summary: This review discusses the recent progress in the field of two-dimensional heterostructures (2D HSs), focusing on the fundamentals and chemistry of heterointerfaces based on van der Waals and covalent interactions. It also addresses challenges in scalable synthesis and introduces characterization techniques for revealing the heterointerface formation, chemistry, and nature. Additionally, it highlights the role of 2D HSs in various emerging applications such as high-power batteries, bifunctional catalysts, electronics, and sensors.
CHEMICAL SOCIETY REVIEWS
(2021)
Article
Nanoscience & Nanotechnology
Mengjuan Mi, Han Xiao, Lixuan Yu, Yingxu Zhang, Yuanshuo Wang, Qiang Cao, Yilin Wang
Summary: Spintronics is a promising technology for developing high-speed, high-density, low-power, and nonvolatile memory and logic devices by controlling and manipulating spin configurations. Two-dimensional magnetic materials have attracted significant attention due to their unique magnetic properties and physical effects, providing a new platform for the development of novel spintronic devices.
MATERIALS TODAY NANO
(2023)
Article
Multidisciplinary Sciences
Arne Quellmalz, Xiaojing Wang, Simon Sawallich, Burkay Uzlu, Martin Otto, Stefan Wagner, Zhenxing Wang, Maximilian Prechtl, Oliver Hartwig, Siwei Luo, Georg S. Duesberg, Max C. Lemme, Kristinn B. Gylfason, Niclas Roxhed, Goran Stemme, Frank Niklaus
Summary: The study presents a generic methodology for large-area integration of 2D materials through adhesive wafer bonding, utilizing equipment, processes, and materials readily available in large-scale semiconductor manufacturing lines. This approach is suitable for back end of the line integration of 2D materials on top of integrated circuits, with the potential to accelerate progress in electronics, photonics, and sensing. Existing integration approaches for 2D materials often degrade material properties and are not compatible with industrial processing, highlighting the need for new strategies like adhesive wafer bonding.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Zilan Tang, Shula Chen, Dong Li, Xiaoxia Wang, Anlian Pan
Summary: With the increasing demand for fast processing and large data capacity, traditional silicon-based technology is becoming saturated. New strategies, such as using two-dimensional (2D) materials, are being explored. This review focuses on the integration of 2D materials into silicon-based platforms for photonic applications, summarizing their optical properties and discussing the state-of-the-art devices and future challenges.
JOURNAL OF MATERIOMICS
(2023)
Review
Materials Science, Multidisciplinary
Wenwen Fei, Jens Trommer, Max Christian Lemme, Thomas Mikolajick, Andre Heinzig
Summary: Two-dimensional materials have become a focus of research for their potential in achieving carrier polarity, threshold voltage control, and multifunctional configurations in electronic devices. This review discusses the working principles and performance improvement metrics for 2D-material-based devices with diverse reconfigurability.
Article
Physics, Multidisciplinary
Lena Du, Zhongchang Wang, Guozhong Zhao
Summary: 2D materials-based memristors with excellent performance and high integration density are a key driving force for the development of artificial intelligence.
FRONTIERS OF PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Junliang Liu, Wenwu Pan, Han Wang, Zekai Zhang, Songqing Zhang, Guang Yuan, CaiLei Yuan, Yongling Ren, Wen Lei
Summary: This research investigated the origins of hysteresis effect in 2D Bi2Te3 FETs and successfully minimized and eliminated the hysteresis by applying a poly(methyl methacrylate) layer, leading to improved carrier mobility and device performance. The study highlights the significant influence of surface/interface trap states on the electrical properties and device performance of nanostructures, emphasizing the necessity of surface passivation for achieving high device performance.
ADVANCED ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Ziren Xiong, Ce Hu, Xingfang Luo, Wenda Zhou, Zhenzhen Jiang, Yong Yang, Ting Yu, Wen Lei, Cailei Yuan
Summary: The research shows that by synthesizing 2D air-stable FM Cr2Te3 nanosheets and combining them with anti-ferromagnetic CrOOH, room-temperature ferromagnetism can be achieved in Cr2Te3, thereby improving the OER performance.
Article
Materials Science, Multidisciplinary
Haoran Li, Yujun Liang, Shiqi Liu, Weilun Zhang, Yanying Bi, Yuming Gong, Wen Lei
Summary: The newly developed narrow-band green phosphor BZAO:Mn2+ exhibits stable emission performance at high temperatures, maintaining good emission intensity and color. The fabricated LED device shows bright white light with a corrected color temperature of 6732K, and its color gamut value approaches or exceeds the NTSC standard.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Han Wang, Songqing Zhang, Tingze Zhang, Junliang Liu, Zekai Zhang, Guang Yuan, Yujun Liang, Jin Tan, Yongling Ren, Wen Lei
Summary: This work reported a study on two-dimensional SnSe nanoplates grown by chemical vapor deposition and their applications in single nanoplate photodetectors. The SnSe nanoplates exhibited excellent device performance with high responsivity, specific detectivity, and external quantum efficiency, as well as low dark current and white noise, resulting in a high signal-to-noise ratio for the detector device.
ACS APPLIED NANO MATERIALS
(2021)
Article
Physics, Applied
Wenwu Pan, Shimul Kanti Nath, Shuo Ma, Renjie Gu, Zekai Zhang, Lan Fu, Lorenzo Faraone, Wen Lei
Summary: In this study, the structural and optical properties of heteroepitaxial II-VI CdTe (211)B buffer layers with strained CdZnTe/CdTe superlattice layers were investigated using non-destructive methods, including high-resolution x-ray diffraction, cathodoluminescence, and photoluminescence spectroscopy. The results showed that the superlattice layers had coherent strain and better in-plane lattice-matching with HgCdTe. The cross-sectional cathodoluminescence and photoluminescence measurements confirmed the coherent growth of the superlattice layers and their dislocation filtering effects. The techniques used in CdTe layers were well correlated with the dislocation density. These non-destructive methods have the potential to be developed into general-purpose techniques for characterizing defect evolution in semiconductor heteroepitaxy.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Songqing Zhang, Han Wang, Maxwell Merle Kirchner, Junliang Liu, Huijia Luo, Yongling Ren, Cailei Yuan, Haroldo Takashi Hattori, Andrey E. Miroshnichenko, Wen Lei
Summary: This study presents the optical applications of chemical vapor deposition-grown Sb2Se3 nanowires in polarized single nanowire photodetectors. High-quality Sb2Se3 nanowires exhibit low shot noise, high responsivity, and high specific detectivity. Additionally, the Sb2Se3 nanowires show broadband polarized photoresponse and appropriate polarimetric imaging quality.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Xunguo Gong, Zhenzhen Jiang, Wei Zeng, Ce Hu, Xingfang Luo, Wen Lei, Cailei Yuan
Summary: This study demonstrates a method to enhance the activity of magnetic single-atom catalysts (SACs) for oxygen evolution reaction (OER) using alternating magnetic field (AMF). By anchoring cobalt single atoms on a MoS2 support, Co@MoS2 composite materials with in-plane ferromagnetic properties are obtained, allowing parallel spin arrangements of oxygen atoms under a magnetic field. Heating the active sites in Co@MoS2 using AMF further improves the OER efficiency.
Article
Materials Science, Multidisciplinary
Han Wang, Ruirui Liu, Songqing Zhang, Yijun Wang, Huijia Luo, Xiao Sun, Yongling Ren, Wen Lei
Summary: This study reports on the growth of monocrystalline Bi2S3 nanowires using chemical vapor deposition and their applications in near-infrared polarized photodetectors. The obtained Bi2S3 nanowires exhibited high quality and a growth model was developed to explain their morphology change. The photodetectors based on these nanowires showed remarkable device performance with high polarization sensitivity to near-infrared light signals.
Article
Chemistry, Multidisciplinary
Wenwu Pan, Zekai Zhang, Renjie Gu, Shuo Ma, Lorenzo Faraone, Wen Lei
Summary: In this study, the epitaxial growth of HgCdTe (111) thin films on 2D layered transparent mica substrates was achieved through molecular beam epitaxy. A large area free-standing HgCdTe thin film was obtained using an etch-free layer transfer process. The issue of twinning defects in HgCdTe/mica was effectively addressed.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Physics, Applied
Zhenzhen Jiang, Ce Hu, Xingfang Luo, Xunguo Gong, Wei Zeng, Chengwu Zou, Hang Zhou, Wenda Zhou, Ting Yu, Wen Lei, Cailei Yuan
Summary: Further uprating the catalytic activities of diatomic active sites while maintaining the atomic loading and diatomic coordination by external stimulation is a promising way to improve diatomic site catalysts. The NiFe@MoS2 DASCs treated with external high-frequency alternating magnetic field exhibit a superior cell voltage of 1.576 V and a current density of 10 mA cm(-2) in alkaline water electrolysis compared to those without magnetic field treatment (1.652 V). The selective magnetic heating of bifunctional diatomic active site proposed in this work can open up new possibilities for the design of highly efficient catalysts for various energy-related reactions.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Wenwu Pan, Shuo Ma, Xiao Sun, Shimul Kanti Nath, Songqing Zhang, Renjie Gu, Zekai Zhang, Lorenzo Faraone, Wen Lei
Summary: The demand for high-performance HgCdTe infrared detectors has led to research on heteroepitaxial growth of HgCdTe and CdTe buffer layers on alternative substrates. This study focuses on the structural properties of CdTe (133)B-oriented buffer layers on GaAs (211)B substrates. By incorporating dislocation filtering layers, the material quality and surface roughness of (133)B-oriented CdTe buffer layers have been improved, making it a feasible approach for growing high-quality CdTe and HgCdTe materials on cost-effective substrates.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Physics, Applied
Wenwu Pan, Shuo Ma, Xiao Sun, Renjie Gu, Lorenzo Faraone, Wen Lei
Summary: This study investigates the structural properties of HgCdTe thin films grown on InSb (211)B substrates using molecular beam epitaxy (MBE). The Cd composition of the films is accurately determined using non-destructive approaches. The study found that surface defects in the as-grown HgCdTe thin films are caused by the formation of In droplets during the oxide removal process. These findings further confirm the importance of suppressing thermally induced damage.
JOURNAL OF APPLIED PHYSICS
(2023)
