Article
Chemistry, Multidisciplinary
Bixuan Li, Juntian Wei, Chunqiao Jin, Kunpeng Si, Lingjia Meng, Xingguo Wang, Yangyu Jia, Qianqian He, Peng Zhang, Jinliang Wang, Yongji Gong
Summary: In this study, an intercalation strategy using organic molecules was developed to fabricate high-quality and diverse twisted bilayer graphene (tBLG). By weakening the interlayer interaction and inducing slide or rotation of the topmost graphene layer, the proportion of tBLGs in the resulting dtBLG reached up to 84.4% for twist angles ranging from 0 degrees to 30 degrees, surpassing previous methods. The twist angle distribution was found to be non-uniform, concentrating in the ranges of 0-10 degrees and 20-30 degrees. This facile and rapid intercalation-based methodology provides a practical solution for studying angle-dependent physics and advancing the utilization of twisted two-dimensional materials.
Article
Chemistry, Multidisciplinary
Giulia Piccinini, Vaidotas Miseikis, Pietro Novelli, Kenji Watanabe, Takashi Taniguchi, Marco Polini, Camilla Coletti, Sergio Pezzini
Summary: Assembly of small-angle twisted bilayer graphene from single-crystals grown by CVD can ensure high-quality transport properties and exhibit features such as tunable interlayer coupling, reduced Fermi velocity, large interlayer capacitance, and density-independent oscillations.
Article
Multidisciplinary Sciences
Luzhao Sun, Zihao Wang, Yuechen Wang, Liang Zhao, Yanglizhi Li, Buhang Chen, Shenghong Huang, Shishu Zhang, Wendong Wang, Ding Pei, Hongwei Fang, Shan Zhong, Haiyang Liu, Jincan Zhang, Lianming Tong, Yulin Chen, Zhenyu Li, Mark H. Rummeli, Kostya S. Novoselov, Hailin Peng, Li Lin, Zhongfan Liu
Summary: The authors developed a chemical vapor deposition method for synthesizing twisted bilayer graphene with controllable angles. By employing a hetero-site nucleation strategy, they successfully prepared bilayer graphene with twist angles ranging from 0 degrees to 30 degrees, demonstrating high-quality and improved performance for potential applications in fundamental research and practical use.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Shan Liu, Baizhe He, Wei Yang, Xiahong Zhou, Xudong Xue, Mengya Liu, Yao Zhao, Xinhe Wang, Jia Si, Fuyi Wang, Zhiyong Zhang, Lianmao Peng, Gui Yu
Summary: This study reports the use of local space-confined chemical vapor deposition growth technique to efficiently produce high-quality single-crystal twisted bilayer graphene (TBG) with twist angles ranging from 0 to 30 degrees on liquid copper substrates. The clean surface, high crystallinity, thermal stability, stacking structure, growth mechanism, and electrical transport properties of the as-grown TBG are investigated. The results show that the liquid copper surface promotes the growth of TBG with twist-angle-dependent electronic properties.
ADVANCED MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Weicheng Qiu, Yanrui Guo, Ruinan Wu, Peisen Li, Jiafei Hu, Junping Peng, Yueguo Hu, Chengxiu Yang, Mengchun Pan
Summary: This paper presents the growth kinetics of large-area twisted bilayer graphene on Ni(111) film by ambient pressure chemical vapor deposition (APCVD) methods. The dominant twist angle of about 22.7 degrees is found to be closely related to the stable energy structure of TBG. This work provides a convenient route for the synthesis of TBG on Ni(111) substrate.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Kaihao Zhang, A. John Hart
Summary: The transfer-free synthesis route allows highly-uniform bilayer graphene to grow directly on dielectric substrates, addressing the issue of wrinkles and folds that occur in traditional methods. The graphene produced through this technique has a smooth surface, free of wrinkles, and exhibits low twist angles, making it promising for various applications.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Xudong Xue, Xiahong Zhou, Dong Li, Mengya Liu, Shan Liu, Liping Wang, Gui Yu
Summary: A novel approach has been developed to directly prepare twisted bilayer graphene (tBLG) on liquid Cu substrate. The experimental results demonstrate the significant role of liquid Cu substrate and gas flow in the formation of tBLG.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Physical
Nathanael P. Kazmierczak, Madeline Van Winkle, Colin Ophus, Karen C. Bustillo, Stephen Carr, Hamish G. Brown, Jim Ciston, Takashi Taniguchi, Kenji Watanabe, D. Kwabena Bediako
Summary: Twisted bilayer graphene exhibits two-regime reconstruction mechanics based on twist angle, with applied heterostrain accumulating anisotropically in saddle-point regions to generate distinctive striped strain phases. Nanoscale spatial fluctuations in twist angle and uniaxial heterostrain were statistically evaluated, revealing the prevalence of short-range disorder in moire heterostructures. This study provides insights into the twist-angle-dependent electronic behavior and structural relaxation, disorder, and strain in moire materials.
Article
Chemistry, Multidisciplinary
Hyeyeon Cho, Yelim Son, Hee Cheul Choi
Summary: Controlling the stacking angle of bilayer graphene is essential for its fundamental studies and applications. This study discovered that graphene rotates during the chemical vapor deposition process, and this rotation can be used to control the stacking angle. The rotation of graphene is mainly influenced by its edge state, which can be tuned by the growth temperature. Experimental results combined with theoretical calculations confirmed the rotation phenomenon. By controlling the growth temperature, highly selective growth of specific stacking angles of bilayer graphene can be achieved.
Article
Multidisciplinary Sciences
Joe Finney, Aaron L. Sharpe, Eli J. Fox, Connie L. Hsueh, Daniel E. Parker, Matthew Yankowitz, Shaowen Chen, Kenji Watanabe, Takashi Taniguchi, Cory R. Dean, Ashvin Vishwanath, M. A. Kastner, David Goldhaber-Gordon
Summary: We present transport measurements of bilayer graphene with a 1.38 degrees interlayer twist. Although we do not observe correlated insulating states or band reorganization, we do observe several highly unusual behaviors in magnetotransport, including large and quadratic magnetoresistance for a large range of densities around half filling of the moire bands, as well as the splitting and bending of magnetoresistance minima corresponding to gaps between Landau levels as a function of density and field. These features appear to be a generic class of experimental manifestations of Hofstadter's butterfly and may provide insight into the emergent states of twisted bilayer graphene.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Multidisciplinary Sciences
Yu Saito, Fangyuan Yang, Jingyuan Ge, Xiaoxue Liu, Takashi Taniguchi, Kenji Watanabe, J. I. A. Li, Erez Berg, Andrea F. Young
Summary: The study explores the finite-temperature dynamics of spin and valley isospins in magic-angle twisted bilayer graphene, revealing a resistivity peak at high temperatures near a superlattice filling factor of -1, suggesting a Pomeranchuk-type mechanism. The data indicate the presence of a finite-field magnetic phase transition and a small isospin stiffness in the system.
Editorial Material
Chemistry, Physical
Wei Yang, Guangyu Zhang
Summary: By stacking few-layer WSe2 in proximity to twisted double bilayer graphene, researchers have solid evidence of superconductivity.
Article
Multidisciplinary Sciences
Yuan Hou, Zhaohe Dai, Shuai Zhang, Shizhe Feng, Guorui Wang, Luqi Liu, Zhiping Xu, Qunyang Li, Zhong Zhang
Summary: This study demonstrates that nanopockets in vdW materials can coalesce spontaneously into larger spaces which can be easily cleaned through mechanical methods, and that bilayer graphene interfaces exhibit excellent self-renewal phenomena in terms of moire patterns recovery after motion of contaminants.
NATURE COMMUNICATIONS
(2021)
Editorial Material
Chemistry, Multidisciplinary
Kanudha Sharda
Summary: The study describes a scalable method to synthesize twisted bilayer graphene, resulting in growth over the largest lateral surface areas reported so far, which has attracted significant interest in the field.
Review
Energy & Fuels
Surjit Sahoo, Gopinath Sahoo, Sang Mun Jeong, Chandra Sekhar Rout
Summary: Vertical graphene (VG) has gained attention as an electrode material for supercapacitors due to its unique properties. Progress has been made in growth and application of VG, but there are still many recent developments to be reviewed. By controlling the growth direction of graphene, its electronic band structure and bandgap can be controlled. VG exhibits superior performance in electrolyte and electron transport, making it a promising material for future energy storage devices. This review summarizes the importance of VG structure, growth methods, and strategies to enhance energy storage performance.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Geochemistry & Geophysics
Charles A. Geiger, George R. Rossman
AMERICAN MINERALOGIST
(2018)
Article
Geochemistry & Geophysics
Yang Liu, Yang Chen, Yunbin Guan, Chi Ma, George R. Rossman, John M. Eiler, Youxue Zhang
EARTH AND PLANETARY SCIENCE LETTERS
(2018)
Article
Mineralogy
Charles A. Geiger, Edgar Dachs, Noreen M. Vielreicher, George R. Rossman
EUROPEAN JOURNAL OF MINERALOGY
(2018)
Article
Mineralogy
Anthony R. Kampf, George R. Rossman, Chi Ma, Donato Belmonte, Cristian Biagioni, Fabrizio Castellaro, Luigi Chiappino
EUROPEAN JOURNAL OF MINERALOGY
(2018)
Article
Crystallography
G. Calvert, S. Swider, F. Ruta, G. Rossman, R. S. Feigelson
JOURNAL OF CRYSTAL GROWTH
(2018)
Article
Geochemistry & Geophysics
Bethany L. Ehlmann, Robert Hodyss, Thomas F. Bristow, George R. Rossman, Eleonora Ammannito, M. Cristina De Sanctis, Carol A. Raymond
METEORITICS & PLANETARY SCIENCE
(2018)
Article
Multidisciplinary Sciences
O. Tschauner, S. Huang, E. Greenberg, V. B. Prakapenka, C. Ma, G. R. Rossman, A. H. Shen, D. Zhang, M. Newville, A. Lanzirotti, K. Tait
Article
Geochemistry & Geophysics
Jed L. Mosenfelder, Anette Von der Handt, Evelyn Furi, Celia Dalou, Richard L. Hervig, George R. Rossman, Marc M. Hirschmann
AMERICAN MINERALOGIST
(2019)
Article
Chemistry, Multidisciplinary
Michelle C. Sherrott, William S. Whitney, Deep Jariwala, Souvik Biswas, Cora M. Went, Joeson Wong, George R. Rossman, Harry A. Atwater
Article
Mineralogy
Andreas Ertl, John Rakovan, John M. Hughes, Heinz-Juergen Bernhardt, George R. Rossman
CANADIAN MINERALOGIST
(2019)
Article
Chemistry, Multidisciplinary
Wei-Hsiang Lin, Wei-Shiuan Tseng, Cora M. Went, Marcus L. Teague, George. R. Rossman, Harry A. Atwater, Nai-Chang Yeh
Article
Mineralogy
Anthony R. Kampf, Robert M. Housley, George R. Rossman
CANADIAN MINERALOGIST
(2018)
Article
Chemistry, Physical
Bryan M. Hunter, Niklas B. Thompson, Astrid M. Muller, George R. Rossman, Michael G. Hill, Jay R. Winkler, Harry B. Gray
Article
Chemistry, Physical
Jie Sheng, Jingshan He, Dun Ma, Yuanbo Wang, Wu Shao, Tian Ding, Ronghao Cen, Jingwen He, Zhihao Deng, Wenjun Wu
Summary: This study presents an innovative approach to improve the photovoltaic conversion characteristics and stability of perovskite solar cells through carbon electrode interface modification. By in-situ polymerization and carbonization on the surface of nano-graphite, a dendritic structure carbon electrode is formed, reducing the work function and aligning the energy levels with perovskite. This leads to improved charge and hole collection efficiency, resulting in increased photovoltaic conversion efficiency. Furthermore, the modified carbon electrode-based perovskite solar cells exhibit exceptional stability, maintaining high efficiency even without encapsulation.
Article
Chemistry, Physical
Guodong Shi, Jian Song, Xiaoxiao Tian, Tongtong Liu, Zhanjun Wu
Summary: This study demonstrates the improvement of mechanical properties and reduction of coefficient of thermal expansion (CTE) in graphene oxide (GO)/epoxy (EP) nanocomposites by enhancing the interface between GO and EP through functionalization and incorporating rigid-flexible interphases. The results reveal that the SiO2-PEA-GO hybrid exhibits better strengthening and toughening effects, as well as lower CTE, compared to the PEA-GO hybrid due to the presence of rigid-flexible interfaces with higher bonding strength and better energy dissipation mechanisms. Additionally, the nanocomposites with longer polyetheramine (PEA) molecules in the rigid-flexible interphases demonstrate higher strength and toughness, while maintaining a lower CTE. This work provides a promising strategy for constructing adjustable flexible-rigid interfacial structures and offers potential in developing GO/EP nanocomposites with high mechanical properties and low CTE.
Article
Chemistry, Physical
Rafal Janus, Sebastian Jarczewski, Jacek Jagiello, Piotr Natkanski, Mariusz Wadrzyk, Marek Lewandowski, Marek Michalik, Piotr Kustrowski
Summary: In this study, a facile procedure for the synthesis of CMK-1 and CMK-2 carbon replicas was developed. The method utilizes basic laboratory equipment and a renewable carbon source, and operates under mild conditions. The resulting carbon mesostructures exhibit exquisite replication fidelity and structural homogeneity, making them suitable for applications in various fields.
Article
Chemistry, Physical
Anqi Wang, Connor J. MacRobbie, Alex Baranovsky, Jean-Pierre Hickey, John Z. Wen
Summary: In this study, a novel polymer-free nanothermite aerogel with a wide range of nanoparticle loading was fabricated via a new additive manufacturing process. The SEM images showed a unique porous structure formed by extra thin rGO sheets, wrapping individual nanothermite clusters. The DSC-TGA results and high-speed combustion videos confirmed the enhanced energetic performance of the printed specimen.
Article
Chemistry, Physical
Wanze Wu, Misheng Zhao, Shiwei Miao, Xiaoyan Li, Yongzhong Wu, Xiao Gong, Hangxiang Wang
Summary: Superhydrophobic solar-driven interfacial evaporator is an energy-efficient technology for seawater desalination, which is easily fabricated using robust photothermal superhydrophobic coating and substrate. The created bifunctional coating on the melamine sponge substrate shows stable and highly efficient photothermal and superhydrophobic performance for seawater desalination. This superhydrophobic solar-driven interfacial evaporator is expected to have wide applications in seawater desalination.
Article
Chemistry, Physical
Zichen Xiang, Zhi Song, Tiansheng Wang, Menghang Feng, Yijing Zhao, Qitu Zhang, Yi Hou, Lixi Wang
Summary: This study presents a co-electrospinning synthesis strategy to fabricate lightweight and porous Co@C composite nanofibres with wideband microwave attenuation capacity. The addition of MOF-derived Co additives enhances the low-frequency absorption performance.
Article
Chemistry, Physical
J. Snow, C. Olson, E. Torres, K. Shirley, E. Cazalas
Summary: This study investigates the use of a perovskite-based graphene field effect transistor (P-GFET) device for X-ray detection. The sensitivity and responsivity of the device were found to be influenced by factors such as X-ray tube voltage, current, and source-drain voltage. Simulation experiments were conducted to determine the dose rate and energy incident on the device during irradiation.
Article
Chemistry, Physical
Zuzana Jankovska, Lenka Matejova, Jonas Tokarsky, Pavlina Peikertova, Milan Dopita, Karolina Gorzolkova, Dominika Habermannova, Michal Vastyl, Jakub Belik
Summary: This study provides new insights into microwave-assisted pyrolysis of scrap tyres, demonstrating that it can produce microporous carbon black with potential application in xylene adsorption. Compared to conventional pyrolysis, microwave pyrolysis requires less time and energy while maintaining similar adsorption capacity.
Article
Chemistry, Physical
Max Bommert, Bruno Schuler, Carlo A. Pignedoli, Roland Widmer, Oliver Groning
Summary: A detailed understanding of the interaction between molecules and two-dimensional materials is crucial for incorporating functional molecular films into next-generation 2D material-organic hybrid devices. This study compares the energy level alignment of different-sized fullerenes on a Moire superstructure and finds that C-84 fullerenes can be either neutral or negatively charged depending on slight variations of the electrostatic potential. This discovery suggests a new path to achieve ambipolar charge transfer without overcoming the electronic gap of fullerenes.
Article
Chemistry, Physical
Yuanjing Cheng, Xianxian Sun, Ye Yuan, Shuang Yang, Yuanhao Ning, Dan Wang, Weilong Yin, Yibin Li
Summary: The dual-structure aerogel (GS) consisting of flexible silica fibers and graphene honeycomb structures exhibits excellent resilience, flexibility, and reliability. It also shows remarkable wave absorbing performance, making it an ideal candidate for microwave absorption applications such as flexible electronics and aerospace.
Article
Chemistry, Physical
Shuyu Fan, Yinong Chen, Shu Xiao, Kejun Shi, Xinyu Meng, Songsheng Lin, Fenghua Su, Yifan Su, Paul K. Chu
Summary: Graphene coatings are promising solid lubrication materials due to their mechanical properties. This study presents a new method for in situ deposition of high-quality graphene coatings on hard substrates using NiCo solid solution and competitive reaction strategies. The graphene coating deposited on substrates with deep NiCo solid solution demonstrates superior low-friction and durability.
Article
Chemistry, Physical
Mengdi Wang, Sanyin Qu, Yanling Chen, Qin Yao, Lidong Chen
Summary: The improved thermoelectric properties of conducting polymers are achieved by selectively capturing single-walled carbon nanotubes (SWNTs) in a conducting polymer film, leading to increased carrier mobility and reduced thermal conductivity. The resulting composite film exhibits significantly higher electrical conductivity and lower thermal conductivity compared to films with a mixture of SWNTs. This work provides a convenient and efficient method to enhance the thermoelectric properties of conducting polymers.
Review
Chemistry, Physical
Heng Wei, Weihua Li, Kareem Bachagha
Summary: This article reviews the research progress of carbon nanotube-based microwave absorbing materials (MAMs) in recent years, covering the fundamental theory, design strategies, synthesis methods, and future development directions.
Article
Chemistry, Physical
Chenguang Shi, Junlong Huang, Zongheng Cen, Tan Yi, Shaohong Liu, Ruowen Fu
Summary: This study developed a high-performance Li metal host material, which achieved dendrite-free Li deposition with a low nucleation overpotential and high Coulombic efficiencies through the combination of Ti3C2-g-PV4P sheets and Ag nanoparticles. The full cells assembled with the Li@host anode and LiFePO4 cathode exhibited high discharge capacity and excellent cycling stability, demonstrating a perspective design for future energy storage devices.
Article
Chemistry, Physical
Tomotaro Mae, Kentaro Kaneko, Hiroki Sakurai, Suguru Noda
Summary: A new partial prelithiation method for SiO/C-CNT electrodes was developed, which showed reduced irreversible capacity and achieved high energy densities with good reversibility. The method allows for precise control of the degree of prelithiation and is applicable to various chemistries.