Review
Chemistry, Multidisciplinary
Sofie Cambre, Ming Liu, Dmitry Levshov, Keigo Otsuka, Shigeo Maruyama, Rong Xiang
Summary: 1D van der Waals heterostructures based on carbon nanotube templates offer exciting possibilities for creating new optical and electronic properties. By engineering the characteristics of these heterostructures through controlling their diameter and chiral structure, they can be integrated into a wide range of applications with custom-built properties.
Article
Chemistry, Multidisciplinary
Fang Wang, Zhiyi Liu, Tao Zhang, Mingsheng Long, Xiuxiu Wang, Runzhang Xie, Haonan Ge, Hao Wang, Jie Hou, Yue Gu, Xin Hu, Ze Song, Suofu Wang, Qingsong Dong, Kecai Liao, Yubing Tu, Tao Han, Feng Li, Zongyuan Zhang, Xingyuan Hou, Shaoliang Wang, Liang Li, Xueao Zhang, Dongxu Zhao, Chongxin Shan, Lei Shan, Weida Hu
Summary: In this study, a fully depleted self-aligned MoS2-BP-MoS2 vdW heterostructure photodetector with high sensitivity and broad wavelength range was reported, which is a new type of room-temperature operating MWIR photodetector.
ADVANCED MATERIALS
(2022)
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, Physical
Jaeho Jeon, Haeju Choi, Sungpyo Baek, Seunghyuk Choi, Jeong Ho Cho, Sungjoo Lee
Summary: Research on ReS2/HfS2 and ReS2/h-BN vdW heterostructures has shown that direct growth of ReS2 films on HfS2 and h-BN can be achieved. The growth behavior is explained through a surface-dependent direct growth process, enabling symmetry-free growth of 2D vdW heterostructures.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
O. Tolga Gul
Summary: A simple and cost effective method was developed to grow a 2.6 mm long vertically aligned carbon nanotube (VACNT) forest without using etchants or other complicated systems. By reducing the catalyst at lower temperature and using low carbon feedstock, dense and uniform nanoparticles formation was achieved, extending the catalyst NP lifetime. Additionally, the time varying forest height of VACNT was accurately represented by the Gompertz model due to low temperature catalyst reduction, enabling a cost effective and eco-friendly synthesis.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Chemistry, Physical
Cong Wang, Chao Xu, Xuyun Guo, Ning Zhang, Jianmin Yan, Jiewei Chen, Wei Yu, Jing-Kai Qin, Ye Zhu, Lain-Jong Li, Yang Chai
Summary: In this study, a Cu foil-assisted alloy-buffer-controlled growth method was designed to epitaxially grow aligned single-crystalline 2D tellurium (Te) on an insulating mica substrate. The in-situ formation of Cu-Te alloy played a key role in alleviating the spatial and temporal non-uniformity of precursor, resulting in the controllable growth of high-quality and highly aligned 2D Te.
Article
Chemistry, Physical
Yu Cai, Huitao Yu, Can Chen, Yiyu Feng, Mengmeng Qin, Wei Feng
Summary: Vertically aligned carbon nanotube (VACNT) arrays have superior vertical thermal conductivity but suffer from weak interaction between adjacent carbon nanotubes (CNT) during polymer infiltration. This study introduces a novel three-dimensional CNT (3DCNT) network structure, where VACNT is crosslinked by secondary CNT, to provide in-plane phonon paths and maintain structural stability. Results show that the 3DCNT20/P composite has significantly higher vertical and horizontal thermal conductivity compared to the IVACNT/P composite.
Article
Chemistry, Multidisciplinary
Wenyu Yuan, Kan Ueji, Takashi Yagi, Takahiko Endo, Hong En Lim, Yasumitsu Miyata, Yohei Yomogida, Kazuhiro Yanagi
Summary: Our study demonstrates that interfacial engineering is an efficient strategy to tune thermal transport, and the vertically stacked MoSe2-MoS2-MoSe2-MoS2 heterostructure shows the lowest thermal conductance. The roles of various interfacial effects on heat flow are revealed, highlighting the importance of interfacial mismatch and coupling effects in thermal transport. The design principle also has promising applications in other areas such as electrical and thermoelectric tuning.
Article
Materials Science, Multidisciplinary
Yaning Wang, Wanying Li, Yimeng Guo, Xin Huang, Zhaoping Luo, Shuhao Wu, Hai Wang, Jiezhi Chen, Xiuyan Li, Xuepeng Zhan, Hanwen Wang
Summary: Fabricating vertically-integrated ferroelectric memristors with non-atomic-diffusion based memtransistors remains challenging. In this study, we demonstrate the realization of a vertically-integrated ferroelectric memristor by hetero-integrating the 2D ferroelectric materials CuInP2S6 (CIPS) into a graphite/CuInP2S6/MoS2 vertical heterostructure. The memristive behavior and multi-level resistance states were achieved, and essential synaptic behaviors were successfully mimicked. The memristive behavior and synaptic features can be effectively gate tuned by applying a gate potential. These findings pave the way for the realization of novel gate-tunable ferroelectric synaptic devices with the capability to perform complex neural functions.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Christian Baeuml, Lorenz Bauriedl, Magdalena Marganska, Milena Grifoni, Christoph Strunk, Nicola Paradiso
Summary: In this study, long-range superconducting correlations were observed in a several-micrometers-long carbon nanotube bundle encapsulated in a van der Waals stack between hBN and NbSe2. The behavior of supercurrent in the nanotube demonstrated characteristics similar to that of the parent Ising superconductor.
Article
Materials Science, Multidisciplinary
Aghyad B. Al Tahhan, Mohammad Alkhedher, Abdel-Hamid I. Mourad, Mohamad Ramadan, Mutasem A. Shehadeh
Summary: The buckling behavior of vertically aligned carbon nanotube (VACNT) bundles with a characterized waviness ratio was studied. A MATLAB algorithm was used to generate bundles with different waviness ratios, and 12 VACNT models were tested under uniaxial compression. The results showed that the waviness ratio, number of VACNTs, and presence of van der Waals interactions significantly influenced the critical buckling stress and buckling behavior of the bundle. This study provides insight into the structural behavior of VACNT bundles and its potential impact on the design of systems dependent on their collective mechanical behavior, such as composite materials in lithium-ion batteries.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Electrochemistry
Ayaz Hassan, Lucyano J. A. Macedo, Isabela A. Mattioli, Rafael J. G. Rubira, Carlos J. L. Constantino, Rodrigo G. Amorim, Filipe C. D. A. Lima, Frank N. Crespilho
Summary: The study introduces a three-component vertically designed monolayer graphene device that exhibits higher chemical reactivity and sensitivity in biochemical sensing. Gold layer transferring electronic density to graphene surface effectively enhances the charge transfer rate with ferrocene. The technology demonstrates high sensitivity and low detection limit in DNA hybridization detection.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Da-Chi Yang, Richard J. J. Castellano, Ricardo Prada Silvy, Sathish K. K. Lageshetty, Robert F. F. Praino, Francesco Fornasiero, Jerry W. W. Shan
Summary: This study reports on the first macroscopic membranes with vertically oriented, subnanometer carbon nanotube (CNT) pores, which show enhanced water flow. The membranes, made using a scalable, solution-based method, exhibit fast pressure-driven water transport with up to 10^5-fold enhancement compared to conventional flow. The results also show that the hydrodynamic slip lengths increase with decreasing nanotube diameter, suggesting that water transport in small-diameter CNTs is dominated by entrance resistance.
Article
Chemistry, Multidisciplinary
Matthew Barone, Chaojie Du, Luka Radosavljevic, Don Werder, Xiaoqing Pan, Darrell G. Schlom
Summary: Researchers reported the epitaxial synthesis of a 2D SnO van der Waals crystal with layers aligned perpendicular to the surface. Although useful devices cannot be fabricated due to the nanowire morphology, this discovery is significant in the fields of 2D materials synthesis and p-type oxides.
CRYSTAL GROWTH & DESIGN
(2022)
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.
