Article
Multidisciplinary Sciences
Florentino Lopez-Urias, Josue Ortiz-Medina
Summary: Using first-principles density functional theory calculations, the properties of armchair graphene nanoribbons (AGNRs) and graphene with an extended line defect (ELD) were investigated. The authors discovered that AGNRs with a 4-8-ELD exhibit metallic behavior, and graphene with 4-8-ELDs is also metallic compared to pristine graphene. This study provides a theoretical basis for tailoring graphene structures with potential applications in electronic devices.
ADVANCED THEORY AND SIMULATIONS
(2022)
Article
Engineering, Electrical & Electronic
Changxin Chen, Yu Lin, Wu Zhou, Ming Gong, Zhuoyang He, Fangyuan Shi, Xinyue Li, Justin Zachary Wu, Kai Tak Lam, Jian Nong Wang, Fan Yang, Qiaoshi Zeng, Jing Guo, Wenpei Gao, Jian-Min Zuo, Jie Liu, Guosong Hong, Alexander L. Antaris, Meng-Chang Lin, Wendy L. Mao, Hongjie Dai
Summary: Sub-10-nm-wide semiconducting graphene nanoribbons with atomically smooth closed edges can be produced by squashing carbon nanotubes using a high-pressure and thermal treatment. The resulting nanoribbons exhibit high mobilities and can be used to fabricate field-effect transistors with high performance.
NATURE ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Mark J. Haastrup, Mathias H. R. Mammen, Jonathan Rodriguez-Fernandez, Jeppe Lauritsen
Summary: The study investigates the lateral interfaces formed between monolayer MoS2 flakes on Au(111) and two families of armchair graphene nanoribbons (GNRs) created through on-surface assisted Ullmann coupling. The findings show that parallel alignment between GNR armchair edges and MoS2 leads to van der Waals bonded nanoribbons, while a perpendicular orientation results in covalent bonding between a phenyl group of GNR and S on the edge. The presence of MoS2 lowers the temperatures needed for intramolecular dehydrogenation during GNR formation, leading to enhanced hydrogen recombination at the MoS2 edges.
Article
Multidisciplinary Sciences
Song Jiang, Tomas Neuman, Alex Boeglin, Fabrice Scheurer, Guillaume Schull
Summary: In this study, the intrinsic optoelectronic properties of graphene nanoribbons (GNRs) were explored using a scanning tunneling microscope-based method. By transferring the GNRs onto a partially insulating surface, luminescence quenching effects were prevented and localized dark excitons associated with the topological end states of the GNRs were observed.
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
Materials Science, Multidisciplinary
Jonathan Bradford, Tin S. Cheng, Tyler S. S. James, Andrei N. Khlobystov, Christopher J. Mellor, Kenji Watanabe, Takashi Taniguchi, Sergei Novikov, Peter H. Beton
Summary: The integration of graphene and hexagonal boron nitride (hBN) in lateral heterostructures allows for engineering the material properties through quantum confinement or introduction of novel electronic and magnetic states at the interface.In this study, graphene nanoribbons(GNRs) passivated by hBN were grown via high-temperature molecular beam epitaxy (HT-MBE) on pre-etched hBN trenches.High-resolution atomic force microscopy(AFM) showed that GNRs grew epitaxially and formed a network passivated by hBN.It was observed using conductive AFM that quasiparticle interference patterns caused by intervalley scattering at the graphene/hBN interface had implications for the potential transport characteristics of hBN passivated GNR devices.
Article
Chemistry, Multidisciplinary
Gabriela Borin Barin, Marco Di Giovannantonio, Thorsten G. Lohr, Shantanu Mishra, Amogh Kinikar, Mickael L. Perrin, Jan Overbeck, Michel Calame, Xinliang Feng, Roman Fasel, Pascal Ruffieux
Summary: The chemical and electronic structure of ultrashort graphene nanoribbons (GNRs) with both armchair and zigzag edges have been studied, along with their chemical reactivity in air.
Article
Chemistry, Multidisciplinary
Neubi F. F. Xavier Jr, Anthony J. R. Payne, Glauco F. Bauerfeldt, Marco Sacchi
Summary: The viability of catalytic methane decomposition (CMD) on carbon-based materials, specifically graphene nanoribbons, was investigated. The bare carbon edges of graphene nanoribbons were found to exhibit comparable performance to commonly used metallic and bi-metallic catalysts for methane decomposition.
FRONTIERS IN CHEMISTRY
(2023)
Article
Chemistry, Physical
Seoin Back, Seung-Ho Yu, Yuanzhe Piao, Juhyung Choi, Aihua Jin, Hyun Dong Jung, Dongjin Ko, Ji Hyun Um, Yoon Choi, So Hee Kim
Summary: This study presents a novel nanoarchitecture of nitrogen and sulfur co-doped graphene nanoribbons, which exhibit high capacity and stable cycling performance as anodes for potassium-ion batteries. Theoretical calculations demonstrate that graphene nanoribbons with NS co-doping have improved potassium-ion intercalation properties compared to parallel-edged nanoribbons.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Physical
Qi Wang, Ruiqiang Guo, Baoling Huang, Yue Chen
Summary: Understanding thermal transport in low-dimensional materials is crucial for the thermal management of nanoelectronics. Research has shown that the thermal conductivity of ultranarrow AGNRs unexpectedly increases as the width decreases, along with changes in lattice constants and phonon scattering channels. Similar trends were observed in ultranarrow armchair BN nanoribbons, providing guidelines for the thermal design of potential nanoelectronics.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Physics, Condensed Matter
Y. Takagaki
Summary: The study focuses on the magnetotransport properties of graphene nanoribbons in contact with superconductors, showing that nearly perfect Andreev reflection results in significant increases in the period of oscillations induced by cyclotron motion. Additionally, chaotic fluctuations are observed in the regime of Hofstadter's butterfly, with transmission modulation periodicity changing continuously over eight orders of magnitude of magnetic-field variation. Commensurability and edge-state oscillations are also examined in situations with specular Andreev reflection.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Multidisciplinary Sciences
Yang Luo, Alberto Martin-Jimenez, Michele Pisarra, Fernando Martin, Manish Garg, Klaus Kern
Summary: The motion of atoms is crucial for chemical and structural transformations. This study demonstrates the detection of vibrational coherences induced by broadband laser pulses on a single graphene nanoribbon using femtosecond coherent anti-Stokes Raman spectroscopy. This suggests a potential breakthrough in tracking and controlling vibrational coherences at the atomic and molecular scales.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Wenhui Niu, Simen Sopp, Alessandro Lodi, Alex Gee, Fanmiao Kong, Tian Pei, Pascal Gehring, Jonathan Naegele, Chit Siong Lau, Ji Ma, Junzhi Liu, Akimitsu Narita, Jan Mol, Marko Burghard, Klaus Muellen, Yiyong Mai, Xinliang Feng, Lapo Bogani
Summary: Only single-electron transistors with a certain level of cleanliness can be used for quantum experiments. The solubility of graphene nanoribbons can be greatly enhanced by edge functionalization, resulting in ultra-clean transport devices with sharp single-electron features. These results demonstrate that molecular graphene can yield exceptionally clean electronic devices directly from solution.
Article
Chemistry, Multidisciplinary
Bo Tian, Junzhu Li, Abdus Samad, Udo Schwingenschlogl, Mario Lanza, Xixiang Zhang
Summary: This study demonstrates a method for controlled production of wafer-scale high-quality nucleus-free graphene-mesh metamaterial films and evaluates the carrier mobility of the fabricated films. These findings contribute to the large-scale production of high-quality low-dimensional graphene-mesh metamaterials and provide insights for the application of integrated circuits based on graphene and other 2D metamaterials.
ADVANCED MATERIALS
(2022)
Editorial Material
Nanoscience & Nanotechnology
Sheng-Yi Xie, Xian-Bin Li
Summary: The study found a novel method to produce metallic GNRs by inserting a symmetric superlattice into other semiconductive GNRs, broadening their applications in nanoelectronics and fundamental science.
NANO-MICRO LETTERS
(2021)
