Review
Chemistry, Multidisciplinary
Xiankun Zhang, Yanzhe Zhang, Huihui Yu, Hang Zhao, Zhihong Cao, Zheng Zhang, Yue Zhang
Summary: As silicon-based electronic devices face challenges of material performance decrease and interface quality degradation, ultrathin 2D materials are considered as potential candidates in future electronics due to their atomically flat surfaces and excellent immunity to short-channel effects. By freely stacking and forming high-quality heterostructure interfaces, all-2D electronics based on 2D van der Waals (vdW) interfaces can exhibit more comprehensive functionality and better performance. However, improving the compatibility of 2D material devices with silicon-based industrial technology remains a critical challenge.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Leihao Feng, Xi Zhang, Quan Zheng, Ya Nie, Gang Xiang
Summary: The structural and electronic properties of a two-dimensional SiAs2/GeAs2 van der Waals heterostructure and its applications have been investigated by first-principles calculations and Silvaco Atlas simulations. The stable heterostructure exhibits an indirect bandgap of 0.99 eV in type II band alignment, making it suitable for light detection and energy harvesting. By applying an appropriate electric field, it can exhibit a direct bandgap up to 0.66 eV. The results show that the band alignment of the heterostructure can be tuned between type II and type I for various applications.
Article
Materials Science, Multidisciplinary
Wen Zhang, Ping Kwan Johnny Wong, Sheng Jiang, Qian Chen, Wei Huang, Andrew Thye Shen Wee
Summary: This review critically evaluates the state-of-the-art of van der Waals interfaces and their potential technological applications in spintronics. It highlights major challenges, proposes a viable solution, and identifies emerging spin-based technologies that could benefit from the versatile van der Waals interfaces enabled by the strategy.
Article
Chemistry, Physical
Yichun Du, Scott A. Bradford, Chongyang Shen, Tiantian Li, Xiaoyuan Bi, Dong Liu, Yuanfang Huang
Summary: This study developed novel analytical expressions and numerical approaches for calculating the interaction energy/force between particles and an air-water interface. The mechanisms of interaction before and after penetration were analyzed, explaining the repulsive forces that inhibit particle approaching and the significant repulsion observed after penetration. The findings of this study are critical for understanding and quantifying engineered processes involving particle manipulation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Yuchuan Pan, Xiaochi Liu, Junqiang Yang, Won Jong Yoo, Jian Sun
Summary: Two-dimensional transition-metal dichalcogenide (TMDC) based semiconducting van der Waals (vdW) heterostructures have unique and tunable properties, and controlling carrier type and band alignment is crucial for desired performances. In this study, carrier type and band alignment in a vertical MoTe2/MoS2 heterojunction are controlled via thickness engineering and surface charge transfer doping, leading to the realization of multifunctional diodes that are universal and applicable to emerging nanoelectronics based on 2D materials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Physics, Applied
Xiaokun Huang, Jinlin Xu, Renfen Zeng, Qinglang Jiang, Xin Nie, Chao Chen, Xiangping Jiang, Jun-Ming Liu
Summary: Utilizing first-principles calculations, the impact of Li-ion intercalation on the ferromagnetism in Fe3GeTe2 bilayer has been investigated. The study shows that at a relatively low intercalation level, Li-ion intercalation can provide beneficial hopping carriers for enhancing interlayer FM coupling. However, over-intercalation may result in filling up the majority spin channel and reducing interlayer FM coupling.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Wenjing Song, Lingan Kong, Quanyang Tao, Qing Liu, Xiangdong Yang, Jia Li, Huigao Duan, Xidong Duan, Lei Liao, Yuan Liu
Summary: The novel van der Waals (vdW) stencil lithography technique developed in this study allows for the fabrication of high performance transistors on 2D semiconductors without inducing damage, and provides a new high resolution lithography technique for 2D materials.
Review
Chemistry, Multidisciplinary
Xiangdong Guo, Wei Lyu, Tinghan Chen, Yang Luo, Chenchen Wu, Bei Yang, Zhipei Sun, F. Javier Garcia de Abajo, Xiaoxia Yang, Qing Dai
Summary: 2D monolayers can be vertically stacked in van der Waals heterostructures to support a wide range of confined polaritons. This offers advantages in terms of controlling the constituent layers, stacking sequence, and twist angles. These heterostructures have extended the performance and functions of polaritons, and potential applications include nanophotonic integrated circuits.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Qian-Qian Yuan, Fawei Zheng, Zhi-Qiang Shi, Qi-Yuan Li, Yang-Yang Lv, Yanbin Chen, Ping Zhang, Shao-Chun Li
Summary: The vdW SnI2 monolayer with a band gap of approximately 2.9 eV in the visible purple range was successfully fabricated for the first time, showing potential as a building block for future electronics/optoelectronics. The study also revealed an indirect-to-direct band gap transition in the SnI2 bilayer, providing insights into the unique properties of this new 2D material.
Article
Engineering, Chemical
Kailin Chen, Jingwei Wu, A. L. Yarin
Summary: Nonwoven fibrous filter membranes are widely used in filtration due to their low cost. However, they are not effective in intercepting particles as small as the SARS-CoV-2 (COVID-19) virus. This study proposes a novel approach to enhance the performance of filtration membranes by reducing fiber size and coating fibers with metal. Experimental results show that this method improves filtration efficiency by incorporating van der Waals forces and electric Coulomb forces. The membrane combining both forces is almost four times more effective than a comparable membrane without the electric force.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Dawei Zhang, Zheng-Dong Luo, Yin Yao, Peggy Schoenherr, Chuhan Sha, Ying Pan, Pankaj Sharma, Marin Alexe, Jan Seidel
Summary: This study presents direct evidence of a phase-selective anisotropic Cu-ion-hopping mechanism in copper indium thiophosphate, revealing a two-step Cu-hopping path. The electrically controlled Cu ion migration is further verified by nanoscale energy-dispersive X-ray spectroscopy (EDS) mapping. These findings offer new insight into anisotropic ionic manipulation in layered vdW ferroelectric/dielectric materials for emergent vdW electronic device design.
Article
Chemistry, Physical
Jing Wang, Yajuan Sun, Mingying Yu, Xihua Lu, Sridhar Komarneni, Cheng Yang
Summary: Highly hydrophilic nanoparticles can stabilize emulsions through van der Waals attraction. Emulsions exhibit highest stability near the isoelectric points of TiO2 nanoparticles. This work presents a simple, general, and green method for preparing particle-stabilized emulsions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
V. V. Baturo, S. S. Lukashov, S. A. Poretsky, A. M. Pravilov, M. M. Sivokhina
Summary: The study discovered the van der Waals complexes populated in the excitation pathway of ArICl, and analyzed the luminescence spectra and temporal behavior to reveal the luminescent properties of ArICl.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Optics
Lucas Queiroz, Edson C. M. Nogueira, Danilo T. Alves
Summary: This study investigates the interaction between a neutral anisotropic polarizable particle and a corrugated surface in the presence of two non-dispersive semi-infinite dielectrics. It was found that when the dielectric constants of the two materials are different, the behaviors of peak, valley, and intermediate regimes exhibit significant changes. These findings provide important insights for understanding the interaction between anisotropic particles and corrugated surfaces.
Article
Chemistry, Multidisciplinary
Peter Sutter, Jacob S. French, Larousse Khosravi Khorashad, Christos Argyropoulos, Eli Sutter
Summary: This study demonstrates the synthesis, structure, morphology, and optoelectronics/photonics properties of GaSe van der Waals nanoribbons obtained by Au- and Ag-catalyzed VLS growth. The GaSe ribbons grown at lower temperatures exhibit remarkably uniform morphology and low edge roughness. Photoluminescence spectroscopy shows intense, narrow light emission at the GaSe bandgap energy.
Article
Chemistry, Multidisciplinary
Hong-Gyu Park, Sang-Bok Jang, Hae-Chang Jeong, Jin-Woo Lee, Dae-Shik Seo
Article
Materials Science, Multidisciplinary
Hae-Chang Jeong, Byeong-Yun Oh, Hong-Gyu Park, Ju Hwan Lee, Yoon Ho Jung, Sang Bok Jang, Dae-Shik Seo
Article
Chemistry, Multidisciplinary
Hong-Gyu Park, Hae-Chang Jeong, Tae-Kyu Park, Dae-Shik Seo
Article
Materials Science, Multidisciplinary
Hong-Gyu Park, Hae-Chang Jeong, Byeong-Yun Oh, Jeong-Min Han, Dae-Shik Seo
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2016)
Article
Materials Science, Multidisciplinary
Seon Yeong Kim, Yoon Ho Jung, Min-Jae Cho, Jae-Won Lee, Hong-Gyu Park, Dai-Hyun Kim, Tae Wan Kim, Ilgu Yun, Dae-Shik Seo
ECS SOLID STATE LETTERS
(2015)
Article
Chemistry, Multidisciplinary
Gun-Young Lee, Hong-Gyu Park, Hae-Chang Jeong, Byeong-Yun Oh, Jeong-Min Han, Dae-Shik Seo
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
(2016)
Article
Chemistry, Multidisciplinary
Yang Liu, Kaihua Liu, Pushan Wen, Byeong-Yun Oh, Hong-Gyu Park, Dae-Shik Seo
Article
Materials Science, Multidisciplinary
Hong-Gyu Park, Hae-Chang Jeong, Ju Hwan Lee, Sang Bok Jang, Byeong-Yun Oh, Jeong-Min Han, Dae-Shik Seo
MATERIALS CHEMISTRY AND PHYSICS
(2016)
Article
Materials Science, Multidisciplinary
Hae-Chang Jeong, Hong-Gyu Park, Ju Hwan Lee, Sang Bok Jang, Byeong-Yun Oh, Jeong-Min Han, Dae-Shik Seo
Article
Chemistry, Multidisciplinary
Hae-Chang Jeong, Ju Hwan Lee, Sang Bok Jang, Hong-Gyu Park, Dae-Shik Seo
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
(2017)
Article
Materials Science, Multidisciplinary
Hong-Gyu Park, Eun-Mi Kim, Gi-Seok Heo, Hae-Chang Jeong, Ju Hwan Lee, Jeong-Min Han, Tae Wan Kim, Dae-Shik Seo
Article
Materials Science, Coatings & Films
Chan-Woo Oh, Eun-Gon Park, Hong-Gyu Park
SURFACE & COATINGS TECHNOLOGY
(2019)
Article
Materials Science, Multidisciplinary
Se-Hoon Choi, Jin-Ah Kim, Sang-Yeon Lee, Kuck-Jin Hwang, Se-Yeong Park, Eun-Song Ji, Hong-Gyu Park
Summary: Combining rubbing process with an atmospheric plasma process improves liquid crystal alignment and electro-optical characteristics, resulting in lower driving voltage and more effective switching voltage. The thermal stability and alignment characteristics of LC displays treated using this combined method are superior to those treated with atmospheric plasma-only process. This study suggests a more efficient route to manufacturing high-performance LC displays.
Article
Materials Science, Ceramics
Jin-Ah Kim, Se-Hoon Choi, Hong-Gyu Park
Summary: We investigate the effect of varying solution-derived zinc oxide (ZnO) concentrations on liquid crystal (LC) alignment after treatment with atmospheric plasma. Uniform alignment of the LC alignment layer is crucial for high-performance displays. The combination of atmospheric plasma and inorganic alignment layer introduces a new efficient manufacturing process with potential applications in various fields. By analyzing the surface modification, LC alignment, and electro-optical characteristics, we find that increasing the ZnO concentration enhances the pretilt angle and dipole moment between LC molecules, leading to improved driving voltage and rapid response time (<20 ms) in the samples. Optimal process conditions for manufacturing ZnO alignment films are determined using the rubbing-atmospheric pressure plasma coprocessing technique.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Myung-Gyun Baek, Sang-Seok Yun, Jin-Sa Kim, Hong-Gyu Park, Sang-Geon Park
Summary: In this study, the deposition of trimethoxy(propyl)silane as a self-assembled monolayer on the ITO substrate surface in OLEDs was investigated. The research focused on the changes in surface characteristics with variations in deposition time and temperature.
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2022)
