Distinctive electronic transport in pyridine-based devices with narrow graphene nanoribbon electrodes

Li, Jie; Duan, Yunrui; Zhou, Yi; Li, Tao; Zhao, Zhenyang; Yin, Longwei; Li, Hui

doi:10.1039/c7ra09552j

Cited by 6 publications

(4 citation statements)

References 59 publications

(56 reference statements)

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“…7,8 For example, a small molecular device may exhibit both robust NDR and rectifier effects. 9 Strong NDR behaviors can be observed in innovative field-effect transistors (FETs) based on graphene and benzene macromolecules. 10 In a molecular switch, different cross-variants of the metal-free porphyrin molecules embedded between the graphene nanoribbons can result in antiresonance, switchable NDR, and moderate rectification.…”

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confidence: 99%

“…Because of the enormous applications of molecular devices in logic circuits and storage components, research works on molecular devices with low-cost materials have been greatly increasing, especially when a new carbon allotrope is discovered experimentally, such as C 60 , carbon nanotubes, and graphene. Among the wide variety of molecular devices, the two-terminal junctions (for example, diodes) have been extensively studied for their diverse and valuable electron transport properties, such as conductive gaps, current rectification, bistable switch, , and negative differential resistance (NDR). , For example, a small molecular device may exhibit both robust NDR and rectifier effects . Strong NDR behaviors can be observed in innovative field-effect transistors (FETs) based on graphene and benzene macromolecules .…”

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confidence: 99%

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Diverse Transport Behaviors in Cyclo[18]carbon-Based Molecular Devices

Zhang

Feng

et al. 2020

J. Phys. Chem. Lett.

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Scientists have been trying to synthesize ring-shaped pure carbon molecules for a half century. A breakthrough was made recently, and cyclo[18]carbon (C 18 ) was produced successfully by bonding an 18-atom ring of carbon. Because of its potential application in molecular devices, it is natural and timely to study the transport behaviors of C 18 . Here we report the electron transport properties of the C 18 -ring connected to various electrodes, including 1D carbon chain, 2D graphene, and 3D silver electrodes, using densityfunctional theory combined with the nonequilibrium Green's function technique. Diverse transport behaviors are found for the C 18 molecular devices, including an Ohmic characteristic, a quasi Schottky feature, and a current-limiting function. The origin and mechanism of unique nonlinear I−V characteristics are investigated by the transmission pathway, transmission spectra, density of states, and molecular frontier orbital theory. This study provides a theoretical guide for exploring the next-generation molecular devices based on this newcomer to the family of carbon allotropes.

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confidence: 99%

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Diverse Transport Behaviors in Cyclo[18]carbon-Based Molecular Devices

Zhang

Feng

et al. 2020

J. Phys. Chem. Lett.

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“…The isolated and prominent resonance transmission peak is dependent on the delocalization of the orbital. Delocalization of an orbital means that an electron has a high moving probability, and thus a corresponding transmission peak appears. , To explore the origin of the transmission peaks P1, P2, and P3, we calculate the transmission eigenstates in the bias window and the molecular projected self-consistent Hamiltonian (MPSH) eigenstates , onto the M2 at different typical bias voltages mentioned above in Figure . Comparing the transmission eigenstates with the MPSH states at zero bias, we find that the P1, P2, and P3 correspond to the highest occupied molecular orbital (HOMO), the lowest unoccupied molecular orbital (LUMO), and the LUMO+1, respectively.…”

Section: Resultsmentioning

confidence: 99%

Effects of Molecular Combination and Side Groups for Thiophene-Benzene-Based Nanodevices

et al. 2019

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The electron transport properties of thiophene-benzene-based molecules attached to zigzag graphene nanoribbon (ZGNR) electrodes are investigated using density functional theory and the nonequilibrium Green function. The results show that 3,6-(dithiophen-2-yl)benzene has better performance compared to 2,5-diphenylthiophene. Interestingly, both the devices exhibit two negative differential resistance (NDR) peaks while a thiophene or a benzene molecule tethered to ZGNR electrodes shows one NDR peak. Although the side groups −OH, −NO 2 , and −NH 2 controllably repress the transmission and current of 3,6-(dithiophen-2-yl)benzene, the current rectification performance is found because of its asymmetry of molecule structure. Unexpectedly, 2,5-diphenylthiophene system added by a thiophene shows semiconductor behavior under a certain bias region. These results contribute to a deep understanding of the electron transport properties of molecular combination and are valuable for designing molecular devices with excellent and distinctive performance at nanoscale.

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“…Electrodes in molecular devices play a crucial role in creating functional organic electronic devices. Li et al 80 calculated and studied the connection of conjugated pyridine terminated molecule-4,4 0 -vinylenedipyridine attached to single-layer zigzag graphene nanoribbons (ZGNRs) and Au electrodes by using¯rst-principles calculations. The results show that ZGNRs-based devices have excellent electrical properties.…”

Section: -11mentioning

confidence: 99%

Single Molecule-Based Electronic Devices: A Review

Chen

2019

NANO

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In the face of the fact that the development of traditional silicon-based electronic devices is increasingly limited, single molecule electronic device, which has been attracting more and more attention, is considered as one of the most hopeful candidates to realize the miniaturization of conventional electronic devices. In this paper, an overview of single molecule electronic devices is provided, including molecular electronic devices and electrode types. First, several molecular electronic devices are presented, including molecular diodes, molecular memories, molecular wires, molecular field effect transistors (FET) and molecular switches. Then the influence of different electrode types of the transport characteristics is introduced, showing that graphene is a promising electrode material for single molecule electronic devices. Moreover, other excellent characteristics of molecular devices are briefly introduced, such as potential thermoelectric effects, new thermally induced spin transport phenomena and negative differential resistance (NDR) behavior. Finally, the future challenges to the development of electronic devices based on single molecules are described.

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Distinctive electronic transport in pyridine-based devices with narrow graphene nanoribbon electrodes

Abstract: Two kinds of pyridine-based molecular devices with the same narrow ZGNR electrodes show different and distinctive non-equilibrium electron transport properties.

Cited by 6 publications

References 59 publications

Diverse Transport Behaviors in Cyclo[18]carbon-Based Molecular Devices

Diverse Transport Behaviors in Cyclo[18]carbon-Based Molecular Devices

Effects of Molecular Combination and Side Groups for Thiophene-Benzene-Based Nanodevices

Single Molecule-Based Electronic Devices: A Review

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