Hybrid nanotube–graphene junctions: spin degeneracy breaking and tunable electronic structure
Literature Information
Zhi-bei Qu, Meina Li, Guoyue Shi, Gui-lin Zhuang
Hybrid carbon nanostructures have attracted enormous interest due to their structural stability and unique physical properties. Geometric and physical properties of a carbon nanotube (CNT)–graphene nanoribbon (GNR) hybrid system were investigated via first-principles density functional theory (DFT) calculations. The nanotube–graphene junction (NTGJ), where the GNR directly links to the CNT by covalent bonds, shows novel electronic dependence on the structural parameters of the building-blocks, such as chirality, nanotube diameter and width of the nanoribbon. For an armchair NTGJ, a small band gap opens up representing asymmetrical spin-up and spin-down bands. However, zig-zag NTGJ shows direct semi-conducting characteristics with a tunable band gap ranging from zero to 0.6 eV. Interestingly, the value of the band gap follows the specific width and diameter dependent oscillations, namely the 3p − 1 principle. Transition-state results reveal the formation of NTGJs is exothermic and has a low energy-barrier. In addition, nanotube–graphene–nanotube junctions or namely dumbbell NTGJs were also studied, which exhibits similar properties with single NTGJ.
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.










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