Article
Chemistry, Multidisciplinary
Maria G. Burdanova, Ming Liu, Michael Staniforth, Yongjia Zheng, Rong Xiang, Shohei Chiashi, Anton Anisimov, Esko Kauppinen, Shigeo Maruyama, James Lloyd-Hughes
Summary: Strong intertube excitonic coupling is demonstrated in 1D van der Waals heterostructures through the interaction of dipole-dipole Coulomb interactions and light-matter interactions. This leads to the creation of intertube biexcitons on short timescales and intertube excitons on longer timescales, which opens up new possibilities for multi-functional applications of these new nanoscale coaxial cables.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Ya Feng, Henan Li, Taiki Inoue, Shohei Chiashi, Slava Rotkin, Rong Xiang, Shigeo Maruyama
Summary: The synthesis of one-dimensional van der Waals heterostructures enables new possibilities in electronics and optoelectronics, with different electrical characteristics induced by natural doping in semiconducting single-walled carbon nanotubes and molybdenum disulfide. Assembling semiconducting single-walled carbon nanotubes, insulating boron nitride nanotubes, and semiconducting molybdenum disulfide nanotubes creates a radial semiconductor-insulator-semiconductor heterojunction. Application of opposite potential polarity on these nanotubes leads to a rectifying effect.
Article
Chemistry, Multidisciplinary
Andrey A. Vyshnevyy, Georgy A. Ermolaev, Dmitriy V. Grudinin, Kirill V. Voronin, Ivan Kharichkin, Arslan Mazitov, Ivan A. Kruglov, Dmitry I. Yakubovsky, Prabhash Mishra, Roman V. Kirtaev, Aleksey V. Arsenin, Kostya S. Novoselov, Luis Martin-Moreno, Valentyn S. Volkov
Summary: This study demonstrates that using anisotropic materials can improve the characteristics of nanophotonic devices by expanding the range of parameters at which single-mode propagation can be achieved.
Article
Chemistry, Multidisciplinary
Andrey A. Vyshnevyy, Georgy A. Ermolaev, Dmitriy V. Grudinin, Kirill V. Voronin, Ivan Kharichkin, Arslan Mazitov, Ivan A. Kruglov, Dmitry I. Yakubovsky, Prabhash Mishra, Roman V. Kirtaev, Aleksey V. Arsenin, Kostya S. Novoselov, Luis Martin-Moreno, Valentyn S. Volkov
Summary: There is a high demand for high-refractive-index and low-loss materials in on-chip nanophotonics. The use of van der Waals (vdW) materials with a high refractive index can provide an advanced alternative. However, it was not clear if the optical anisotropy perpendicular to the layers might hinder the development of vdW nanophotonics. By studying WS2-based waveguides, it was discovered that the low refractive index in the direction perpendicular to the atomic layers actually improves the characteristics of the devices.
Article
Biotechnology & Applied Microbiology
Zhang Yi, Yu Hongda, Sun Mengdi, Xu Yong
Summary: This paper presents a hybrid swarming algorithm that combines Ant Colony Optimization and Physarum Polycephalum Algorithm, and introduces the use of Van Der Waals force in the pheromone update mechanism. The improved algorithm prevents premature convergence into local optima and has demonstrated excellent accuracy and convergence time in simulations. Comparison with other advanced algorithms also indicates its superior performance. The robustness and versatility of the hybrid algorithm are further verified using the capitals of 35 Asian countries.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
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
Eli Sutter, Hannu-Pekka Komsa, Alexander A. Puretzky, Raymond R. Unocic, Peter Sutter
Summary: Breaking symmetry in van der Waals crystals through layer stacking offers a promising approach for designing new ferroelectric materials.
Article
Multidisciplinary Sciences
A. J. Sternbach, S. H. Chae, S. Latini, A. A. Rikhter, Y. Shao, B. Li, D. Rhodes, B. Kim, P. J. Schuck, X. Xu, X-Y Zhu, R. D. Averitt, J. Hone, M. M. Fogler, A. Rubio, D. N. Basov
Summary: Layered crystals, such as tungsten diselenide, can exhibit unconventional optical properties that allow for the propagation of subdiffractional waveguide modes with hyperbolic dispersion. This study demonstrates optically induced hyperbolicity in WSe2 and explores the role of quantum transitions of excitons in the observed polaritonic response.
Article
Chemistry, Multidisciplinary
Sihan Zhao, Ryo Kitaura, Pilkyung Moon, Mikito Koshino, Feng Wang
Summary: This review summarizes experimental observations and theoretical perspectives related to interlayer interactions in 1D vdW moire superlattices, focusing on the unique optical features and physics in 1D DWNTs arising from the non-trivial strong interlayer coupling effect. Proposed and discussed are future directions and questions in probing the intriguing physical phenomena in 1D vdW moire superlattices, including correlated physics in different 1D moire systems beyond DWNTs.
Article
Chemistry, Physical
Yuri Shakhman, Ilan Shumilin, Daniel Harries
Summary: To cope with stress induced by high salinity and hydrostatic pressure, marine animals accumulate osmolytes. This study focuses on the mechanism of urea's action on lipid membranes and its interaction with trimethylamine N-oxide (TMAO). It is found that urea weakens the van der Waals attraction between bilayers and the effects of urea and TMAO are largely additive. This research is important in understanding the role of osmolytes in lipid adhesion and fusion.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Wenjing Yan, Andrey Akimov, Joseph A. Page, Mark T. Greenaway, Alexander G. Balanov, Amalia Patane, Anthony J. Kent
Summary: The study investigates the intralayer and interlayer bondings in the alpha and beta polytypes of In2Se3, a vdW material with potential applications in advanced electronic and optical devices. The differences in sound velocity and elastic properties between the alpha- and beta-In2Se3 are examined through picosecond ultrasonic experiments, revealing the significant contribution of interlayer atomic bonding to their distinct elastic properties.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Multidisciplinary Sciences
Long Zhang, Fengcheng Wu, Shaocong Hou, Zhe Zhang, Yu-Hsun Chou, Kenji Watanabe, Takashi Taniguchi, Stephen R. Forrest, Hui Deng
Summary: Controlling matter-light interactions with cavities is crucial in modern science and technology. By integrating MoSe2-WS2 heterobilayers in a microcavity, cooperative coupling between moire-lattice excitons and microcavity photons has been established, providing versatile control of both matter and light. This moire polariton system combines strong nonlinearity and microscopic-scale tuning of matter excitations, offering a platform to study collective phenomena from tunable arrays of quantum emitters.
Article
Nanoscience & Nanotechnology
Run-Sen Zhang, Jin-Wu Jiang
Summary: This study investigates the impact of misfit strain on buckling instability in graphene/MoS2 heterostructures. Negative misfit strain reduces buckling stability, while small positive misfit strain enhances it. Large positive misfit strain can decrease the buckling stability by shifting the initiation of buckling from graphene to MoS2 layer.
Article
Physics, Applied
Hiromu Hamasaki, Kaori Hirahara
Summary: The van der Waals cohesive forces between two carbon nanotubes were studied experimentally using transmission electron microscopy. The contact forces were determined by measuring the deflection and Young's modulus of the nanotubes. The cohesive forces at cross-contacts ranged from 1.7 to 8.5 nN and increased with the diameter of the nanotubes. The closed cap of the nanotube exhibited a nine times larger cohesive force compared to the sidewall.
APPLIED PHYSICS EXPRESS
(2023)
Article
Nanoscience & Nanotechnology
Satoru Matsushita, Keigo Otsuka, Taiki Sugihara, Guangyao Zhu, Kasidis Kittipaisalsilpa, Minhyeok Lee, Rong Xiang, Shohei Chiashi, Shigeo Maruyama
Summary: In this study, the researchers developed a method to create isolated heterostructure arrays using aligned carbon nanotubes grown on a quartz substrate. Air-suspended arrays of carbon nanotubes were used as templates for the coaxial wrapping of boron nitride nanotubes, resulting in improved transistor performance. The device fabrication and characterization presented here do not require elaborate electron microscopy, making it a practical approach for nanoelectronics.
ACS APPLIED MATERIALS & INTERFACES
(2023)