Review
Chemistry, Multidisciplinary
Iosif Tantis, Smita Talande, Vasileios Tzitzios, Georgia Basina, Vishal Shrivastav, Aristides Bakandritsos, Radek Zboril
Summary: This review focuses on recent advances in electrochemical energy storage (EES) technologies related to 2D crystals originating from non-layered 3D solids (non-van der Waals; nvdW) and their influence on the materials' features. The methods and challenges in top-down and bottom-up strategies towards nvdW 2D sheets and their applications in EES are discussed. Moreover, the opportunities and challenges of nvdW 2D systems in various applications are highlighted.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Hui-Lei Hou, Cosimo Anichini, Paolo Samori, Alejandro Criado, Maurizio Prato
Summary: In the past 15 years, 2D materials have revolutionized materials science and become powerful components for high-performance chemical sensors. By forming van der Waals heterostructures (VDWHs), the individual drawbacks of 2D materials can be overcome, leading to superior sensitivities, selectivity, and stability. This review discusses the latest developments in chemical sensors based on VDWHs of 2D materials, including sensing mechanisms and future directions with potential impact in environmental sciences and biomedical applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Abhinandan Antony, Martin Gustafsson, Guilhem J. Ribeill, Matthew Ware, Anjaly Rajendran, Luke C. G. Govia, Thomas A. Ohki, Takashi Taniguchi, Kenji Watanabe, James Hone, Kin Chung Fong
Summary: By utilizing van der Waals materials, quantum bits can be reduced in size while maintaining capacitance and quantum coherence, potentially enabling high qubit-density quantum processors. This study demonstrates the broad utility of layered heterostructures in low-loss, high-coherence quantum devices.
Review
Chemistry, Multidisciplinary
Hao Wang, Jianmei Chen, Yanping Lin, Xiaohan Wang, Jianmin Li, Yao Li, Lijun Gao, Labao Zhang, Dongliang Chao, Xu Xiao, Jong-Min Lee
Summary: This review critically examines the progress of non-vdW 2D electrocatalysts, with a special emphasis on electronic structure modulation and performance enhancement. Strategies such as heteroatom doping, vacancy engineering, pore creation, alloying, and heterostructure engineering are analyzed for tuning electronic structures to achieve higher electrocatalytic performance. A roadmap for the future development of non-vdW 2D electrocatalysts is provided from material, mechanism, and performance perspectives.
ADVANCED MATERIALS
(2021)
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
Dongjoon Rhee, Boyun Han, Myeongjin Jung, Jihyun Kim, Okin Song, Joohoon Kang
Summary: In this study, a solution-based hierarchical structuring method was reported to create continuous stretchable semiconductor films through the self-assembly of two-dimensional nanosheets. By forming hierarchical wrinkles with multigenerational structures, the films achieved crack resistance and significantly improved photoresponsivity and strain sensor performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Thales V. A. G. de Oliveira, Tobias Noerenberg, Gonzalo Alvarez-Perez, Lukas Wehmeier, Javier Taboada-Gutierrez, Maximilian Obst, Franz Hempel, Eduardo J. H. Lee, J. Michael Klopf, Ion Errea, Alexey Y. Nikitin, Susanne C. Kehr, Pablo Alonso-Gonzalez, Lukas M. Eng
Summary: Research demonstrates nanoscale-confined phonon polaritons at THz frequencies in vdW semiconductors using scattering-type scanning near-field optical microscopy and a free-electron laser, achieving extreme field confinement and low optical losses.
ADVANCED MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Xiantong Yu, Xin Wang, Feifan Zhou, Junle Qu, Jun Song
Summary: 2D van der Waals heterojunctions are a novel type of metamaterial that are flexible, adjustable, and easy to assemble. By combining different 2D materials and stacking methods, they can exhibit more abundant optical properties and have made significant progress in the field of nanophotonic devices.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Victor Zatko, Simon Mutien-Marie Dubois, Florian Godel, Cecile Carretero, Anke Sander, Sophie Collin, Marta Galbiati, Julian Peiro, Federico Panciera, Gilles Patriarche, Pierre Brus, Bernard Servet, Jean-Christophe Charlier, Marie-Blandine Martin, Bruno Dlubak, Pierre Seneor
Summary: This study presents a growth process utilizing pulsed laser deposition to create large-scale complex van der Waals heterostructures at a high temperature, demonstrating the successful construction of multilayer stacks in a single run with high homogeneity. The structural preservation achieved through continuous in situ growth allows even the most fragile 2D layers to remain intact when encapsulated in van der Waals heterostructures.
Review
Physics, Multidisciplinary
Lin Ju, Mei Bie, Xiwei Zhang, Xiangming Chen, Liangzhi Kou
Summary: Two-dimensional Janus van der Waals heterojunctions with tuneable electronic structures, wide light adsorption spectra, controllable contact resistance, and sufficient redox potential due to intrinsic polarization and unique interlayer coupling show promise in electronics and energy conversion devices. The fundamental properties and potential applications of these heterostructures are summarized and discussed, with further challenges and research directions outlined.
FRONTIERS OF PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Cheng-Yi Zhu, Jing-Kai Qin, Pei-Yu Huang, Hai-Lin Sun, Nie-Feng Sun, Yan-Lei Shi, Liang Zhen, Cheng-Yan Xu
Summary: This study demonstrates a successful method to obtain air-stable ultrathin indium phosphorus sulfide (In2P3S9) nanosheets with excellent insulating properties, suitable for integration into MoS2 FETs to improve electrical performance. This approach paves the way for further research on 2D materials for functional electronics.
Review
Chemistry, Physical
Haifeng Que, Huaning Jiang, Xingguo Wang, Pengbo Zhai, Lingjia Meng, Peng Zhang, Yongji Gong
Summary: Two-dimensional (2D) materials have excellent and controllable physical and chemical properties, mainly bonded by strong ionic or covalent bonds within layers and stacked together by van der Waals forces between layers. Introducing guest atoms can significantly change the interlayer spacing and coupling strength, thereby tuning the material properties.
ACTA PHYSICO-CHIMICA SINICA
(2021)
Article
Chemistry, Multidisciplinary
Seong Rae Cho, Seonghun Ahn, Seung Hyung Lee, Heonhak Ha, Tae Soo Kim, Min-kyung Jo, Chanwoo Song, Tae Hong Im, Pragya Rani, Minseung Gyeon, Kiwon Cho, Seungwoo Song, Min Seok Jang, Yong-Hoon Cho, Keon Jae Lee, Kibum Kang
Summary: A method for direct optical lithography (DOL) of vdW materials using single-pulse irradiation of high-power light through a photomask is reported, allowing large-scale patterning with sub-micrometer resolution and clean surface. The thermal profile during DOL is investigated using the finite element method, and the ideal conditions of DOL according to the materials and substrates are determined.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Tianping Ying, Tongxu Yu, Yanpeng Qi, Xiaolong Chen, Hideo Hosono
Summary: By breaking traditional alloying strategy restrictions, the high entropy concept has expanded the field of alloy exploitation. This review focuses on the combination of the high entropy concept and van der Waals systems to create a new category of materials called high entropy van der Waals materials (HEX). The design strategy for HEX incorporates the local features of high entropy materials and the holistic degrees of freedom in van der Waals materials, successfully leading to the discovery of various high entropy compounds with desirable physical properties. Additionally, deliberate design of structural units and their stacking configuration in HEX can also enhance catalytic performance.
Article
Materials Science, Multidisciplinary
Aravind Puthirath Balan, Anand B. Puthirath, Soumyabrata Roy, Gelu Costin, Eliezer Fernando Oliveira, M. A. S. R. Saadi, Vishnu Sreepal, Rico Friedrich, Peter Serles, Abhijit Biswas, Sathvik Ajay Iyengar, Nithya Chakingal, Sohini Bhattacharyya, Sreehari K. Saju, Samuel Castro Pardo, Lucas M. Sassi, Tobin Filleter, Arkady Krasheninnikov, Douglas Galvao, Robert Vajtai, Rahul R. Nair, Pulickel M. Ajayan
Summary: The discovery of novel materials with emergent functionalities at ambient conditions is crucial for sustainable social and technological advancement. Nanotechnology and nanomaterials have already led to significant breakthroughs, such as carbon nanotubes and graphene. The unique properties of 2D materials have attracted attention, but the library of such materials is limited. Recent research progress on non-van der Waals 2D materials has renewed scientific interest.
Article
Engineering, Chemical
Sisi Yang, Patrick Ford, Sriram Subramanian, Dan Singleton, Jason Sanders, Stephen B. Cronin
Summary: The research explores the use of transient pulsed plasma with applied DC bias to treat oil aerosols, achieving a 99.9% reduction in particulates. The method opens up new possibilities in designing electrostatic oil aerosol pollution control devices.
Article
Physics, Applied
Hwijong Lee, Geethal Amila Gamage, John L. Lyons, Fei Tian, Brandon Smith, Evan R. Glaser, Zhifeng Ren, Li Shi
Summary: The high lattice thermal conductivity of semiconducting cubic boron arsenide (BAs) has led to interest in studying its bulk electronic band structure for potential use in electronic devices. In this study, scanning tunneling spectroscopy (STS) was used to investigate the electronic structure of BAs single crystals. The measured bandgap at interior locations of the cleaved surface is about 2.1 eV, close to the calculated bulk bandgap value of 2.05 eV.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Renae N. Gannon, Danielle M. Hamann, Jeffrey Ditto, Gavin Mitchson, Sage R. Bauers, Devin R. Merrill, Douglas L. Medlin, David C. Johnson
Summary: The study focused on the mechanisms and types of defects in layered van der Waals heterostructures, finding that defect type and density depend on the nanoarchitecture. Strategies for controlling defect concentrations were proposed.
ACS APPLIED NANO MATERIALS
(2021)
Article
Physics, Applied
Xun Li, Hwijong Lee, Eric Ou, Sangyeop Lee, Li Shi
Summary: This study investigates the phenomenon of Poiseuille phonon flow in thin graphite and its effect on thermal conductivity. The research finds that as the thickness of the graphite increases, the phonon scattering processes lead to an increased basal-plane thermal conductivity, contradicting previous experimental results.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Qianru Jia, Yifei Liu, Donglei Emma Fan, Li Shi
Summary: The study investigates the impact of chemical vapor deposition on the structure and thermal conductivities of graphitic foams and dendritic graphitic foams, revealing the potential for enhanced thermal management in these materials. By introducing a small volume fraction of functional materials into the graphitic foams, a significant increase in room-temperature solid thermal conductivity is achieved, while dendritic graphitic foams with increased surface area show lower effective thermal conductivity despite a compromised solid thermal conductivity. Through systematic variations in catalyst template morphology and CVD conditions, the distinct roles of catalyst surface curvature and graphitic strut thickness in controlling the properties of the two types of foams are elucidated.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Article
Physics, Multidisciplinary
Zherui Han, Xiaolong Yang, Sean E. Sullivan, Tianli Feng, Li Shi, Wu Li, Xiulin Ruan
Summary: This study considers multiple factors such as phonon anharmonicity, phonon renormalization, and electron-phonon coupling on the Raman peak frequency shift and linewidth in graphene samples. The results show that four-phonon scattering contributes significantly to the linewidth, increasing with temperature, while the temperature dependence of electron-phonon interactions reverses above a certain doping threshold.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Jungwoo Shin, Geethal Amila Gamage, Zhiwei Ding, Ke Chen, Fei Tian, Xin Qian, Jiawei Zhou, Hwijong Lee, Jianshi Zhou, Li Shi, Thanh Nguyen, Fei Han, Mingda Li, David Broido, Aaron Schmidt, Zhifeng Ren, Gang Chen
Summary: Semiconductors with high thermal conductivity and electron-hole mobility are crucial for electronic and photonic devices as well as for fundamental studies. Cubic boron arsenide (c-BAs), with its ultrahigh thermal conductivity and ambipolar mobility, shows promise as a candidate material for next-generation electronics.
Article
Materials Science, Multidisciplinary
Yuanyuan Zhou, Chunhua Li, Pawan Koirala, Geethal Amila Gamage, Hanlin Wu, Sheng Li, Navaneetha K. Ravichandran, Hwijong Lee, Andrei Dolocan, Bing Lv, David Broido, Zhifeng Ren, Li Shi
Summary: This study reports peak thermal conductivity measurements of boron arsenide (BAs) crystals synthesized under different conditions. The measured thermal conductivities agree with theoretical calculations. Analysis of the peak temperatures and magnitudes reveals differences in boundary scattering mean free path and point defect scattering strength. The phonon-defect scattering behavior correlates with other experimental results, clarifying the origins of extrinsic phonon scattering mechanisms in BAs crystals.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Physics, Applied
Yongjian Zhou, Wen-Pin Hsieh, Chao-Chih Chen, Xianghai Meng, Fei Tian, Zhifeng Ren, Li Shi, Jung-Fu Lin, Yaguo Wang
Summary: In this study, we observed a non-monotonic dependence of thermal conductivity on pressure in boron arsenide, which is a result of several competing effects, including defect-phonon scattering and modification of structural defects under high pressure.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Peter Sokalski, Zherui Han, Gabriella Coloyan Fleming, Brandon Smith, Sean E. Sullivan, Rui Huang, Xiulin Ruan, Li Shi
Summary: Micro-Raman spectroscopy is an important tool to study the thermophysical properties of functional materials. The effects of hot optical phonons on Raman spectra are investigated in molybdenum disulfide, and a correction method is used to distinguish them from the effects of thermally induced compressive stress. The observed behavior of hot phonons agrees with a first-principles based multitemperature model and provides insights into the energy relaxation processes in this material.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Hwijong Lee, Yuanyuan Zhou, Sungyeb Jung, Hongze Li, Zhe Cheng, Jiaming He, Jie Chen, Peter Sokalski, Andrei Dolocan, Raluca Gearba-Dolocan, Kevin C. Matthews, Feliciano Giustino, Jianshi Zhou, Li Shi
Summary: The lattice thermal conductivity of metals and semimetals is limited by phonon-phonon scattering at high temperatures and by electron-phonon scattering at low temperatures. Recent theories have predicted ultrahigh thermal conductivity in the semimetal tantalum nitride due to a combination of small electron density of states and large phonon band gap. Experimental measurements on polycrystalline theta-TaN samples confirmed these predictions and showed weak temperature dependence with a thermal conductivity value up to 90 Wm(-1)K(-1).
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Multidisciplinary Sciences
Mir Mohammad Sadeghi, Yajie Huang, Chao Lian, Feliciano Giustino, Emanuel Tutuc, Allan H. MacDonald, Takashi Taniguchi, Kenji Watanabe, Li Shi
Summary: The peculiar electron-phonon interaction in graphene heterostructures enables ultrahigh mobility, electron hydrodynamics, superconductivity, and superfluidity. A peak in the Lorenz ratio near 60 kelvin and its decrease with increased mobility are observed in degenerate graphene, indicating an unusual behavior. This experimental observation, combined with ab initio calculations and analytical models, suggests that broken reflection symmetry in graphene heterostructures can relax the selection rule for electron coupling with flexural phonons, contributing to the increase of the Lorenz ratio at intermediate temperatures.
Article
Materials Science, Multidisciplinary
Sean E. Sullivan, Hwijong Lee, Annie Weathers, Li Shi
Summary: We demonstrate that the combination of spin Peltier effect and electron-phonon scattering in heavy-metal/magnetic insulator bilayers leads to significantly larger magnetoresistance compared to existing theories that neglect the interplay between magnetoresistance and spin caloritronic effects. Our analytical model, taking into account local nonequilibrium in both magnon chemical potential and temperature, explains the observed frequency dependence of spin Peltier magnetoresistance and spin Seebeck effect as a result of the reduction in thermal penetration depth, which approaches the magnon spin-diffusion length at high frequencies.
Article
Materials Science, Multidisciplinary
Zherui Han, Peter Sokalski, Li Shi, Xiulin Ruan
Summary: Previous studies have revealed remarkable nonequilibrium among different phonon polarizations in laser-irradiated graphene and metals using a phonon polarization-level model. In this study, we develop a semiconductor-specific multitemperature model (SC-MTM) that takes into account electron-hole pair generation, diffusion, and recombination. Our findings show that the polarization-level model does not yield observable nonequilibrium in laser-irradiated MoS2, but significant nonequilibrium is predicted between zone-center optical phonons and other modes. The momentum-based nonequilibrium ratio increases with decreasing laser spot size and interaction with a substrate, which has implications for understanding energy relaxation in two-dimensional optoelectronic devices and thermal transport measurements using Raman spectroscopy.
Article
Thermodynamics
Qianru Jia, Yuanyuan Zhou, Xun Li, Lucas Lindsay, Li Shi
Summary: This study presents advances in the measurement of the intrinsic thermal conductivity of individual multi-walled CNT samples using a multi-probe measurement method. The sample-thermometer thermal interface resistance is directly measured and the temperature distribution along the contacted sample segment is modeled. The results reveal diffusive phonon transport in these multi-walled CNT samples and show that the measured thermal conductivity increases with temperature. Additionally, the differential electro-thermal bridge measurement method enhances the signal-to-noise ratio and reduces the measurement uncertainty.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)