Side-group chemical gating via reversible optical and electric control in a single molecule transistor

Meng, Lei; Xin, Na; Hu, Chen; Wang, Jinying; Gui, Bo; Shi, Junjie; Wang, Cheng; Shen, Cheng; Zhang, Guangyu; Guo, Hong; Meng, Sheng; Guo, Xuefeng

doi:10.1038/s41467-019-09120-1

Cited by 108 publications

(107 citation statements)

References 47 publications

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“…T he ultimate objectives in the field of molecular electronics are to realize electronic functionalities, such as rectifying, optical switching, and thermoelectric effects, at the device miniaturization limit and to systemize all the aspects of the charge transport mechanisms for rational device design [1][2][3][4][5][6][7][8][9][10][11][12] . Specially designed molecular species have been utilized for the realization of specific (or desired) device functions.…”

mentioning

confidence: 99%

Tunable rectification in a molecular heterojunction with two-dimensional semiconductors

et al. 2020

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Until now, a specifically designed functional molecular species has been recognized as an absolute necessity for realizing the diode's behavior in molecular electronic junctions. Here, we suggest a facile approach for the implementation of a tailored diode in a molecular junction based on non-functionalized alkyl and conjugated molecular monolayers. A twodimensional semiconductor (MoS 2 and WSe 2 ) is used as a rectifying designer at the alkyl or conjugated molecule/Au interface. From the adjustment of band alignment at molecules/ two-dimensional semiconductor interface that can activate different transport pathways depending on the voltage polarity, the rectifying characteristics can be implemented and controlled. The rectification ratio could be widely tuned from 1.24 to 1.83 × 10 4 by changing the molecular species and type and the number of layers of the two-dimensional semiconductors in the heterostructure molecular junction. Our work sets a design rule for implementing tailored-diode function in a molecular heterojunction structure with nonfunctionalized molecular systems.

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confidence: 99%

Tunable rectification in a molecular heterojunction with two-dimensional semiconductors

et al. 2020

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“…Recently, Meng and coworkers fabricated graphene‐molecule‐graphene single‐molecule junctions with newly synthesized 2′‐p‐tolyldiazenyl‐1,1′ : 4,4′‐terphenyl‐4,4′′‐dicarboxylic acid (TTDA), which has an immobilized azobenzene unit as a side‐group at the terphenyl aromatic chain as shown in Figure 8(d) [111] . One critical feature of this structure was that a robust backbone enhanced junction stability although the azobenzene unit changes its form at the side group.…”

Section: Photoswitching and Charge Transport In Molecular Junctionsmentioning

confidence: 99%

Photoswitching Molecular Junctions: Platforms and Electrical Properties

Kim

2020

ChemPhysChem

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Remarkable advances in technology have enabled the manipulation of individual molecules and the creation of molecular electronic devices utilizing single and ensemble molecules. Maturing the field of molecular electronics has led to the development of functional molecular devices, especially photoswitching or photochromic molecular junctions, which switch electronic properties under external light irradiation. This review introduces and summarizes the platforms for investigating the charge transport in single and ensemble photoswitching molecular junctions as well as the electronic properties of diverse photoswitching molecules such as diarylethene, azobenzene, dihydropyrene, and spiropyran. Furthermore, the article discusses the remaining challenges and the direction for moving forward in this area for future photoswitching molecular devices.

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“…Otherwise, the reversible in situ conformation changes in single‐molecule junction are difficult due to the mechanical restriction. Later, they further exploited the azobenzene core as a side‐group chemical gating via reversible optical and electric control to realize the single‐molecule switching effects . This strategy makes the molecular structure stable, as the switching of azobenzene in the side chain has no mechanical restriction in the molecular junction.…”

Section: Stimuli‐responsive Materials For Electrical Switchesmentioning

confidence: 99%

“…With a graphene‐molecule‐graphene junction, Guo et al investigated the charge transport of a molecule comprising an azobenzene side group orthogonal to the electron transport channel . They reported an unusually discovery of unambiguous conductance switching upon two external stimuli (light and electric field).…”

Section: Stimuli‐responsive Materials For Electrical Switchesmentioning

confidence: 99%

“…By smartly designing the molecular structure, several functions can be integrated into the same single‐molecule junction. Several groups have reported single‐molecule switches controlled by different external stimuli . As shown in Figure A, a spiropyran derivative that undergoes rapid and reversible isomerization under either UV light or chemical stimuli was incorporated into a single‐molecule device via the STM‐BJ technique, providing a bifunctional electrical switch .…”

Section: Stimuli‐responsive Materials For Electrical Switchesmentioning

confidence: 99%

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Electrical and spin switches in single‐molecule junctions

Duan

Huang

et al. 2019

InfoMat

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Single-molecule electrical and spin switches have been one of the main research focuses in molecular electronics and spintronics because they may form the most important elements for the future information technology, thus attracting great attention in the scientific community and witnessing significant progresses benefiting from the combination of physics, chemistry, materials, and engineering. The key issue of constructing single-molecule switches is the development of stimulus-responsive systems that provide bistable or multiple states. In this review, we summarize the recent advances of this field in terms of the external stimulus that induces the switching. A variety of external stimuli, such as light, electric field, magnetic field, mechanical force, and chemical stimulus, have been successfully employed to activate the reversible switching in single-molecule junctions by manipulating molecular structures, conformations, electronic states, and spin states. As a burgeoning field, we finally put forward the challenges in molecular electronics and spintronics that need to be solved, which will initiate intense research. K E Y W O R D Selectrical switch, single-molecule junction, spin switch, stimuli-responsive system

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Side-group chemical gating via reversible optical and electric control in a single molecule transistor

Cited by 108 publications

References 47 publications

Tunable rectification in a molecular heterojunction with two-dimensional semiconductors

Tunable rectification in a molecular heterojunction with two-dimensional semiconductors

Photoswitching Molecular Junctions: Platforms and Electrical Properties

Electrical and spin switches in single‐molecule junctions

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