Tetrathiafulvalenes as anchors for building highly conductive and mechanically tunable molecular junctions

Zhou, Qi; Song, Kai; Zhang, Guanxin; Song, Xuwei; Lin, Junfeng; Zang, Yaping; Zhang, Deqing; Zhu, Daoben

doi:10.1038/s41467-022-29483-2

Cited by 20 publications

(15 citation statements)

References 58 publications

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“…Notably, except the intrinsic electronic structure of molecular wires, the electrode-molecule coupling also largely influences the charge transport efficiency ( 39 ). Directly anchoring the molecular conducting π-channels to electrodes can promote electrode-molecule coupling and increase the conductance of single-molecule devices ( 38 , 40 ).…”

Section: Discussionmentioning

confidence: 99%

Highly efficient charge transport across carbon nanobelts

et al. 2022

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Carbon nanobelts (CNBs) are a new form of nanocarbon that has promising applications in optoelectronics due to their unique belt-shaped π-conjugated systems. Recent synthetic breakthrough has led to the access to various CNBs, but their optoelectronic properties have not been explored yet. In this work, we study the electronic transport performance of a series of CNBs by incorporating them into molecular devices using the scanning tunneling microscope break junction technique. We show that, by tuning the bridging groups between the adjacent benzenes in the CNBs, we can achieve remarkably high conductance close to 0.1 G 0 , nearly one order of magnitude higher than their nanoring counterpart cycloparaphenylene. Density functional theory–based calculations further elucidate the crucial role of the structural distortion played in facilitating the unique radial π-electron delocalization and charge transport across the belt-shaped carbon skeletons. These results develop a basic understanding of electronic transport properties of CNBs and lay the foundation for further exploration of CNB-based optoelectronic applications.

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Section: Discussionmentioning

confidence: 99%

Highly efficient charge transport across carbon nanobelts

et al. 2022

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“…[4] The diversity of organic molecules, combined with molecular selfassembly methods, is expected to produce electronic devices with novel structures and specific functions. [5][6][7][8][9] The exploration of electronic devices using molecular materials is currently in a new direction. The self-assembled molecules on the surface can realize large manipulation of the physical properties of inorganic solids, which is a new technology for the preparation of new functional devices.…”

Section: Doi: 101002/smll202203015mentioning

confidence: 99%

Chiral‐Molecule‐Based Spintronic Devices

Shang

Liu

Yang

et al. 2022

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Spintronics and molecular chemistry have achieved remarkable achievements separately. Their combination can apply the superiority of molecular diversity to intervene or manipulate the spin‐related properties. It inevitably brings in a new type of functional devices with a molecular interface, which has become an emerging field in information storage and processing. Normally, spin polarization has to be realized by magnetic materials as manipulated by magnetic fields. Recently, chiral‐induced spin selectivity (CISS) was discovered surprisingly that non‐magnetic chiral molecules can generate spin polarization through their structural chirality. Here, the recent progress of integrating the strengths of molecular chemistry and spintronics is reviewed by introducing the experimental results, theoretical models, and device performances of the CISS effect. Compared to normal ferromagnetic metals, CISS originating from a chiral structure has great advantages of high spin polarization, excellent interface, simple preparation process, and low cost. It has the potential to obtain high efficiency of spin injection into metals and semiconductors, getting rid of magnetic fields and ferromagnetic electrodes. The physical mechanisms, unique advantages, and device performances of CISS are sequentially clarified, revealing important issues to current scientific research and industrial applications. This mini‐review points out a key technology of information storage for future spintronic devices without magnetic components.

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“…The other competing factor is the broadening of the frontier resonant peaks, which results from the coupling of molecular states to the extended states of the electrode. 41,42 Here, the reduction in the width of frontier peaks along the series implies that the coupling of acenes with electrodes gets weaken upon increasing the length which plausibly decreases the conductance. This can be directly inferred from the spatial distribution of MOs (Figure S3 in SI) which reveals that orbital coefficients falls off quickly at the terminal connecting sites with increasing length which eventually results in weak coupling with electrodes.…”

Section: Evolution Of Transport Characteristics For Acenesmentioning

confidence: 99%

Anti-ohmic Nanoconductors: Myth, Reality and Promise

Bajaj

Ali

2022

Preprint

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The recent accomplishments in the design of molecular nanowires characterised by an increasing conductance with length has embarked the origin of extraordinary new family of molecular junctions referred to as "anti-ohmic" wires. Herein, this highly desirable, non-classical behavior, has been examined for the longer enough molecules exhibiting pronounced diradical character in their ground state within the unrestricted DFT formalism with spin and spatial symmetry breaking. We demonstrate that highly conjugated acenes signals higher resistance in open-shell singlet (OSS) configuration as compared to their closed-shell counterparts. This anomaly has been further put to proof for experimentally certified cumulene wires, which reveals phenomenal modulation in the transport characteristics such that an increasing conductance is observed in closed-shell limit, while higher cumulenes in OSS ground state yields a regular decay of conductance.

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Tetrathiafulvalenes as anchors for building highly conductive and mechanically tunable molecular junctions

Cited by 20 publications

References 58 publications

Highly efficient charge transport across carbon nanobelts

Highly efficient charge transport across carbon nanobelts

Chiral‐Molecule‐Based Spintronic Devices

Anti-ohmic Nanoconductors: Myth, Reality and Promise

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