Article
Nanoscience & Nanotechnology
Ruo-Xuan Sun, Qin-Qin Guo, Chang-Fu Huo, Xiao-Qing Yan, Zhi-Bo Liu, Jian-Guo Tian
Summary: Strain engineering is an effective method to introduce large strain in graphene, breaking lattice symmetry and achieving tunability of the graphene band gap. Experimental research has shown that over 50% strain can result in the opening of the graphene band gap, leading to a unique photovoltaic effect. This work deepens the understanding of strain-induced changes in the photoelectrical properties of graphene and demonstrates the potential for strained graphene as a platform for high-speed, miniaturized photodetectors.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Can Wang, Kaili Wang, Huaiqiang Wang, Qichao Tian, Junyu Zong, Xiaodong Qiu, Wei Ren, Li Wang, Fang-Sen Li, Wei-Bing Zhang, Haijun Zhang, Yi Zhang
Summary: Superlattice potentials imposed on graphene can alter its Dirac states, enabling the realization of various quantum phases. We experimentally observed a replica Dirac cone at the Brillouin zone center induced by a superlattice in heavily doped graphene with Gd intercalation using angle-resolved photoemission spectroscopy (ARPES). The replica Dirac cone arises from the (root 3x root 3)R30 degrees superlattice formed by the intervalley coupling of two nonequivalent valleys, accompanied by a bandgap opening. The modulation of the replica Dirac band is primarily attributable to the residual frozen gas, which can act as a source of intervalley scattering at temperatures below 30 K. Our results highlight the persistence of the hidden Kekule'-like phase within heavily doped graphene, enriching our current understanding of its replica Dirac Fermions.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Physics, Applied
L. Bockhorn, J. C. Rode, L. Gnoerich, P. Zuo, B. Brechtken, R. J. Haug
Summary: Research on the self-assembly of twisted bilayer graphene formed by cutting and folding processes reveals that structures not only move forward but also rotate during self-assembly, ultimately leading to commensurate interlayer configurations in the final positions.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Wei Cui, Yixuan Wang, Zhihui He, Hui He
Summary: The study demonstrates that dual plasma induced transparency can be effectively tuned by Fermi levels, carrier mobilities, and polarization angles. The group index achieved on a graphene coupled metasurface can be as high as approximately 2553, paving the way for the design of slow-light devices.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Physical
Shasha Wang, Xianxian Sun, Fan Xu, Minglong Yang, Weilong Yin, Jianjun Li, Yibin Li
Summary: Researchers successfully enhanced the tensile strength of graphene films by preparing GO/graphene hybrid films using graphene oxide (GO). The tensile strength of the films increased with the concentration of GO, showing excellent fracture toughness.
Article
Chemistry, Physical
Fei Wang, Xiao Qi, Limin Mao, Jian Mao
Summary: By introducing strong coupling effect on the atomic scale and aligned structure on the microscale simultaneously, a superior ferric oxide/graphene anode was established. The enhanced performance of the electrode was achieved through the design of strong coupling and aligned structure.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Optics
Rui Zhang, Shengchuan Wang, Bin You, Kui Han, Xiaopeng Shen, Weihua Wang
Summary: Graphene and its folded form offer a promising platform for plasmonics, with dipole modes exhibiting mode splitting and high order modes that can be engineered. The properties of these modes can be tuned by the size of structures and the Fermi level of graphene, enriching current research in graphene plasmonics and paving the way for specific plasmonic device applications.
Article
Chemistry, Multidisciplinary
Huitao Yu, Yiyu Feng, Can Chen, Heng Zhang, Lianqiang Peng, Mengmeng Qin, Wei Feng
Summary: In this study, a composite material with high thermal conductivity, elasticity, and adhesion was successfully fabricated, which exhibited high sensitivity to temperature and pressure and demonstrated self-learning capacity. This material can be developed into core materials in intelligent soft robots.
Article
Optics
Rui Zhang, Weihua Wang
Summary: This study proposes a new method to solve the issue of optical absorption in graphene by using free-standing folded graphene ribbons (FGRs) to achieve perfect optical absorption. High absorption rates can be achieved by choosing appropriate folding and incident angles. The study also finds that the optical absorption spectra can be actively tuned by electrostatic gating.
Review
Chemistry, Multidisciplinary
Tianzhu Zhou, Qunfeng Cheng
Summary: Graphene materials are widely used due to their outstanding mechanical and electrical properties, but face challenges during assembly that impact performance. Strategies have been developed in the past decade to address these challenges, resulting in strong graphene materials with practical applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Physics, Multidisciplinary
Haoxin Zhou, Chunli Huang, Nemin Wei, Takashi Taniguchi, Kenji Watanabe, Michael P. Zaletel, Zlatko Papic, Allan H. MacDonald, Andrea F. Young
Summary: At high magnetic fields, monolayer graphene exhibits competing phases. Recent experiments have observed a special quantum Hall state that is related to the underlying isospin order. However, no direct evidence for this transition has been reported. This study measures the transmission of magnons in monolayer graphene and finds that transmission is controlled by density and restored in the antiferromagnetic regime. Additionally, a hidden phase transition between bulk insulating charge density wave and canted antiferromagnetic phase is directly detected.
Article
Physics, Condensed Matter
Sharieh Jamalzadeh Kheirabadi, Rahim Ghayour, Maryam Sanaee
Summary: In this research, a new gas sensor structure called Attached FAGNR tube (AFAGNT) was designed using carbon nanotube material. The AFAGNT showed significant sensitivity to CO gas while being insensitive to CO2 gas.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Chemistry, Multidisciplinary
Xutao Wang, Ningning Liu, Yanfu Wu, Yueqiao Qu, Wenxuan Zhang, Jinyue Wang, Dandan Guan, Shiyong Wang, Hao Zheng, Yaoyi Li, Canhua Liu, Jinfeng Jia
Summary: Metal-intercalated bilayer graphene has a high density of states near the Fermi energy, and thus is expected to exhibit enhanced strong correlation effect and superconductivity. By using a scanning tunneling microscope, researchers observed the superconducting energy gap and diamagnetic response in Ca-intercalated bilayer graphene, revealing strong coupling superconductivity and an isotropic s-wave superconductor.
Article
Engineering, Manufacturing
Can Cao, Jingsong Peng, Xiumin Liang, Eduardo Saiz, Stephan E. Wolf, Hanoch Daniel Wagner, Lei Jiang, Qunfeng Cheng
Summary: By mimicking the unique structure of biogenic silk, the performance of aramid fibers was significantly improved through a coating of graphene nanosheets, resulting in enhanced tensile strength and electrical conductivity.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Chemistry, Multidisciplinary
Can Cao, Zongkai Lin, Xiaochen Liu, Yanyan Jia, Eduardo Saiz, Stephan E. Wolf, Hanoch Daniel Wagner, Lei Jiang, Qunfeng Cheng
Summary: Coating Bombyx mori silks with a thin layer of reduced graphene oxide (rGO) has been shown to significantly increase their tensile strength and toughness. This bioinspired approach provides a universal and facile strategy for functionalizing natural fibers.
ADVANCED FUNCTIONAL MATERIALS
(2021)
