Single-molecule non-volatile memories: an overview and future perspectives

Si, Wei; Li, Junhao; Li, Guangwu; Jia, Chuancheng; Guo, Xuefeng

doi:10.1039/d3tc03724j

Cited by 4 publications

(3 citation statements)

References 84 publications

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“…Due to the bistability, single-molecule junctions based on 1 could be used as molecular memristors. 39 Moreover, these junctions are interesting for quantum applications, since closed-shell and open-shell state have different spin properties. By additional external stimuli such as magnetic fields, the spin state could be tuned, as was recently shown for a junction based on naphto-bis(thiadiazole).…”

Section: Resultsmentioning

confidence: 99%

Cyclohepta[def]fluorene as a bistable molecule: first principles studies on its electronic structure and the effects of benzo-extension, substitution and solvation

Toews,

Köhn

2024

Phys. Chem. Chem. Phys.

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Section: Resultsmentioning

confidence: 99%

Cyclohepta[def]fluorene as a bistable molecule: first principles studies on its electronic structure and the effects of benzo-extension, substitution and solvation

Toews,

Köhn

2024

Phys. Chem. Chem. Phys.

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“…Aiming at the miniaturization of electric devices, the development of molecular electronics depends on fabricating molecular devices with highly conductive molecules [ 1 , 2 , 3 , 4 ]. Since the π orbital has the energetic advantages in electron transport, the strategies to design molecules performing high conductance are usually based on the fully conjugated structures, including the introduction of constructive quantum interference [ 5 , 6 , 7 ], the construction of self-gating systems [ 8 , 9 , 10 ] and the ‘topological insulator’ built by the radical system [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Hydroxyl Group as the ‘Bridge’ to Enhance the Single-Molecule Conductance by Hyperconjugation

Lv,

Li,

Guo

et al. 2024

Molecules

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For designing single-molecule devices that have both conjugation systems and structural flexibility, a hyperconjugated molecule with a σ–π bond interaction is considered an ideal candidate. In the investigation of conductance at the single-molecule level, since few hyperconjugation systems have been involved, the strategy of building hyperconjugation systems and the mechanism of electron transport within this system remain unexplored. Based on the skipped-conjugated structure, we present a rational approach to construct a hyperconjugation molecule using a hydroxyl group, which serves as a bridge to interact with the conjugated fragments. The measurement of single-molecule conductance reveals a two-fold conductance enhancement of the hyperconjugation system having the ‘bridging’ hydroxyl group compared to hydroxyl-free derivatives. Theoretical studies demonstrate that the hydroxyl group in the hyperconjugation system connects the LUMO of the two conjugated fragments and opens a through-space channel for electron transport to enhance the conductance.

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“…These novel components must be compatible with existing infrastructure to minimize costs. Therefore, one potential solution for achieving miniaturization in electronic devices is the utilization of molecular devices, which employ molecules as fundamental functional elements [ 1 , 2 , 3 , 4 ]. Due to their greater control flexibility compared to Si crystals, molecular systems offer opportunities for tailored functionality based on their unique chemical properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Bridging Manner on the Transport Behaviors of Dimethyldihydropyrene/Cyclophanediene Molecular Devices

Cui,

Dai,

et al. 2024

Molecules

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A molecule–electrode interface with different coupling strengths is one of the greatest challenges in fabricating reliable molecular switches. In this paper, the effects of bridging manner on the transport behaviors of a dimethyldihydropyrene/cyclophanediene (DHP/CPD) molecule connected to two graphene nanoribbon (GNR) electrodes have been investigated by using the non-equilibrium Green’s function combined with density functional theory. The results show that both current values and ON/OFF ratios can be modulated to more than three orders of magnitude by changing bridging manner. Bias-dependent transmission spectra and molecule-projected self-consistent Hamiltonians are used to illustrate the conductance and switching feature. Furthermore, we demonstrate that the bridging manner modulates the electron transport by changing the energy level alignment between the molecule and the GNR electrodes. This work highlights the ability to achieve distinct conductance and switching performance in single-molecular junctions by varying bridging manners between DHP/CPD molecules and GNR electrodes, thus offering practical insights for designing molecular switches.

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Single-molecule non-volatile memories: an overview and future perspectives

Abstract: A single-molecule non-volatile memory is a crucial component of future nanoscale information storage. This article provides an overview of the design, mechanism and prospects of single-molecule non-volatile memories.

Cited by 4 publications

References 84 publications

Cyclohepta[def]fluorene as a bistable molecule: first principles studies on its electronic structure and the effects of benzo-extension, substitution and solvation

Cyclohepta[def]fluorene as a bistable molecule: first principles studies on its electronic structure and the effects of benzo-extension, substitution and solvation

Hydroxyl Group as the ‘Bridge’ to Enhance the Single-Molecule Conductance by Hyperconjugation

Effect of Bridging Manner on the Transport Behaviors of Dimethyldihydropyrene/Cyclophanediene Molecular Devices

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