Article
Chemistry, Physical
Fatemeh Mazhari Mousavi, Rouhollah Farghadan
Summary: This study investigates the influence of electric fields on the spin-dependent thermoelectric properties of graphene nanoribbons with asymmetric zigzag edge extensions. The results show that the electric field significantly reduces the spin gap and lowers the threshold temperature, while inducing higher spin currents in the nanoribbons.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Review
Physics, Applied
Haomin Wang, Hui Shan Wang, Chuanxu Ma, Lingxiu Chen, Chengxin Jiang, Chen Chen, Xiaoming Xie, An-Ping Li, Xinran Wang
Summary: Graphene nanoribbons, as a family of one-dimensional materials with a graphitic lattice structure, have shown high mobility, current-carrying capability, and versatile electronic properties, making them promising candidates for quantum electronic applications. Recent progress has been made in the atomically precise bottom-up synthesis of GNRs and heterojunctions, as well as in the production of semiconducting GNR arrays on insulating substrates, indicating a potential for large-scale digital circuits. In the near future, GNRs could become competitive candidate materials in quantum information sciences.
NATURE REVIEWS PHYSICS
(2021)
Article
Multidisciplinary Sciences
Teng-Chin Hsu, Bi-Xian Wu, Rong-Teng Lin, Chia-Jen Chien, Chien-Yu Yeh, Tzu-Hsuan Chang
Summary: In this research, a design of Coved GNRs with periodic structure is proposed, and its size is within the practical feature sizes by advanced lithography tools. The carrier transport properties of Coved GNRs with the periodic coved shape are designed to enhance mobility and exclude zero bandgap conditions. The fabrication of Coved-GNRs is compatible with current fabrication facilities.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Jian Zhang, Gabriela Borin Barin, Roman Furrer, Cheng-Zhuo Du, Xiao-Ye Wang, Klaus Muellen, Pascal Ruffieux, Roman Fasel, Michel Calame, Mickael L. Perrin
Summary: Bottom-up synthesized graphene nanoribbons (GNRs) are of interest due to their atomically controlled structure and customizable physical properties. However, understanding the relationship between cryogenic charge transport and the number of GNRs in a device is challenging due to lack of precise control over GNR length and location.
Article
Physics, Applied
S. Ihnatsenka
Summary: Quantum-mechanical calculations of electron transport in ideal graphene nanoribbons show that the transport gap predicted by noninteracting theories vanishes when the long-range Coulomb interaction between electrons is considered. However, the gap reappears if a ribbon is connected to wider leads, typically in experimental setups using lithographically patterned graphene ribbons. The gap is determined by scattering at the lead-to-ribbon interface, which can be captured by noninteracting theory.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Suresh Kumar, Twinkle, Manpreet Kaur
Summary: The study demonstrates a facile method to prepare highly conductive graphene nanoribbons via microwave treatment of acid processed carbon nanotubes, which is an important step towards the development of GNR based electronic devices.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Bosai Lyu, Jiajun Chen, Shuo Lou, Can Li, Lu Qiu, Wengen Ouyang, Jingxu Xie, Izaac Mitchell, Tongyao Wu, Aolin Deng, Cheng Hu, Xianliang Zhou, Peiyue Shen, Saiqun Ma, Zhenghan Wu, Kenji Watanabe, Takashi Taniguchi, Xiaoqun Wang, Qi Liang, Jinfeng Jia, Michael Urbakh, Oded Hod, Feng Ding, Shiyong Wang, Zhiwen Shi
Summary: Graphene nanoribbons (GNRs) are promising materials for future nanoelectronic applications, but growing long GNRs on insulating substrates remains a challenge. This study reports the successful epitaxial growth of micrometer-long GNRs on an insulating substrate using nanoparticle-catalyzed chemical vapor deposition.
ADVANCED MATERIALS
(2022)
Article
Physics, Mathematical
Giovanni Nastasi, V. Dario Camiola, Vittorio Romano
Summary: Graphene nanoribbons, with their unique band structure and edge effects, exhibit different electron transport properties compared to large area graphene. By solving the semiclassical Boltzmann equation, it was found that reducing the nanoribbon width leads to degradation of charge velocities and mobilities, mainly due to edge scattering.
COMMUNICATIONS IN COMPUTATIONAL PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Wiliam F. da Cunha, Marcelo L. Pereira Junior, William F. Giozza, Rafael T. de Sousa Junior, Luiz A. Ribeiro Junior, Geraldo M. e Silva
Summary: This study used a numerical approach to reveal the charge transport mechanism in porous graphene nanoribbons, finding that the transport is mediated by polarons. The porosity of PG allows for the preservation of its semiconducting character. The polarons in PG move within the optical regime with lower velocities compared to conventional graphene nanoribbons.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Yifan Zhang, Kecheng Cao, Takeshi Saito, Hiromichi Kataura, Hans Kuzmany, Thomas Pichler, Ute Kaiser, Guowei Yang, Lei Shi
Summary: This study investigated the diameter-dependent synthesis of GNRs using SWCNTs of different average diameters, and found that the width of GNRs can be tailored by the diameter of SWCNTs. Particularly, SWCNTs with an average diameter of 1.3 nm produced the highest yield of 6 and 7 armchair GNRs, indicating potential for high-yield production of certain GNRs in large scale applications.
Review
Materials Science, Biomaterials
Siyu Luo, Xi Chen, Yihan He, Yingqiu Gu, Chengzhou Zhu, Guo-Hai Yang, Lu-Lu Qu
Summary: Graphene nanoribbons (GNRs), a new type of quasi-one-dimensional graphene-based material, have unique properties and wide applications, especially in electronics and biomedical fields. Despite challenges in the synthesis and application of functionalized GNRs, they hold significant practical promise in various biomedical applications in the future.
JOURNAL OF MATERIALS CHEMISTRY B
(2021)
Article
Chemistry, Physical
Gesiel G. Silva, Wiliam F. da Cunha, Marcelo L. Pereira Junior, Luiz F. Roncaratti, Luiz A. Ribeiro Junior
Summary: Our investigation on bipolaron dynamics in armchair graphene nanoribbons (AGNRs) reveals that in different electric fields and electron-phonon coupling regimes, bipolarons in narrower AGNRs move as fast as those in conjugated polymers, shedding light on the behavior of charge carriers in graphene nanoribbons.
CHEMICAL PHYSICS LETTERS
(2021)
Review
Chemistry, Multidisciplinary
Wenjing Bo, Yi Zou, Jingang Wang
Summary: Graphene nanoribbons (GNRs), as representatives of nano-graphene materials, possess novel electrical properties, highly adjustable electronic properties, and optoelectronic properties due to their diverse geometric structures and atomic precision configurations. The electrical properties and band gaps of GNRs are influenced by factors such as width, length, boundary configuration, and elemental doping. With advancements in preparation technology, an increasing number of GNRs with different configurations are being produced, offering new possibilities for applications in microelectronics.
Article
Mechanics
S. K. Nevhal, S. Kundalwal
Summary: This study demonstrates the mechanism of strain-induced polarization in defective armchair graphene nanoribbons (AGNRs) using first-principles calculations. The research reveals that polarization can be engineered in graphene by changing the pore/defect symmetry and concentration.
Article
Nanoscience & Nanotechnology
Vivek Saraswat, Austin J. J. Way, Xiaoqi Zheng, Robert M. M. Jacobberger, Sebastian Manzo, Nikhil Tiwale, Jonathan H. H. Dwyer, Jason K. K. Kawasaki, Chang-Yong Nam, Padma Gopalan, Michael S. S. Arnold
Summary: The synthesis of mesoscale graphene nanomeshes with atomically faceted edges and covalently bonded junctions on Ge(001) through the rotational self-alignment of graphene nanoseeds and their anisotropic growth is demonstrated. The electrical characteristics of the nanomeshes are simulated, revealing the critical importance of seed diameter and pitch in achieving desirable on/off ratios and on-conductance in semiconductor electronics. The results suggest that further refinement of lithography techniques may lead to nanomeshes with superior electronic properties and potential applications in various fields.
