The influence of water on the charge transport through self-assembled monolayers junctions fabricated by EGaIn technique

Shi, Jie; Jiang, Feng; Long, Shichuan; Lu, Zhixing; Liu, Tianshuo; Zheng, Honghua; Shi, Jia; Yang, Yang; Hong, Wenjing; Tian, Zhong‐Qun

doi:10.1016/j.electacta.2021.139304

Cited by 5 publications

(6 citation statements)

References 55 publications

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“…These thin films were fabricated by immersing Au substrates into dimethyl sulfoxide (DMSO) solutions containing either the ligands or molecular cages, and their morphology was characterized by atomic force microscopy ( 58 ) ( SI Appendix , section S4 ), indicating that the surfaces were homogenous and the relative roughness matched well with their respective molecular lengths. The conductance of these thin films was measured by putting them into contact with conical GaIn alloy tips with a home-built EGaIn instrument ( 59 ) ( Fig. 4 A ).…”

Section: Resultsmentioning

confidence: 99%

Scaling of quantum interference from single molecules to molecular cages and their monolayers

Wang

Blankevoort

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

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The discovery of quantum interference (QI) is widely considered as an important advance in molecular electronics since it provides unique opportunities for achieving single-molecule devices with unprecedented performance. Although some pioneering studies suggested the presence of spin qubit coherence and QI in collective systems such as thin films, it remains unclear whether the QI can be transferred step-by-step from single molecules to different length scales, which hinders the application of QI in fabricating active molecular devices. Here, we found that QI can be transferred from a single molecule to their assemblies. We synthesized and investigated the charge transport through the molecular cages using 1,3-dipyridylbenzene (DPB) as a ligand block with a destructive quantum interference (DQI) effect and 2,5-dipyridylfuran (DPF) as a control building block with a constructive quantum interference (CQI) effect using both single-molecule break junction and large area junction techniques. Combined experiments and calculations revealed that both DQI and CQI had been transferred from the ligand blocks to the molecular cages and the monolayer thin film of the cages. Our work introduced QI effects from a ligand to the molecular cage comprising 732 atoms and even their monolayers, suggesting that the quantum interference could be scaled up within the phase-coherent distance.

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Section: Resultsmentioning

confidence: 99%

Scaling of quantum interference from single molecules to molecular cages and their monolayers

Wang

Blankevoort

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

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“…A potential approach involves the fabrication of molecular junctions using metal nanoelectrodes to couple plasmons with the spatial optical field, thereby enabling photon emission. [42] Currently, a diverse range of methods are utilized to accomplish this, including Scanning Tunneling Microscopy (STM), [41,[43][44][45] Scanning Tunneling Microscope Break Junction (STM-BJ), [46] Mechanically Controllable Break Junction (MCBJ), [47][48] Electromigration, [49][50][51] Self-Assembled Monolayers-based Tunneling Junction (SAMs-STJ), [52][53][54] Nanoantenna Structures [55] etc. Among these methods, STM is one of the earliest and broadest methods used to study plasmon interactions in SMJs and has proven reliable for certain applications.…”

Section: Methodsmentioning

confidence: 99%

Plasmon‐Molecule Interactions in Single‐Molecule Junctions

Zhang,

Li,

et al. 2023

ChemPlusChem

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Single‐molecule optoelectronics offers opportunities for advancing integrated photonics and electronics, which also serves as a tool to elucidate the underlying mechanism of light‐matter interaction. Plasmonics, which plays pivotal role in the interaction of photons and matter, have became an emerging area. A comprehensive understanding of the plasmonic excitation and modulation mechanisms within single‐molecule junctions (SMJs) lays the foundation for optoelectronic devices. Consequently, this review primarily concentrates on illuminating the fundamental principles of plasmonics within SMJs, delving into their research methods and modulation factors of plasmon‐exciton. Moreover, we underscore the interaction phenomena within SMJs, including the enhancement of molecular fluorescence by plasmonics, Fano resonance and Rabi splitting caused by the interaction of plasmon‐exciton. Finally, by emphasizing the potential applications of plasmonics within SMJs, such as their roles in optical tweezers, single‐photon sources, super‐resolution imaging, and chemical reactions, we elucidate the future prospects and current challenges in this domain.

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“…EGaIn has been shown to be a very useful in molecular electronics (ME) as a top electrode, for contacting soft organic materials and probing their intrinsic properties, as reported by our group [152][153][154] and several other groups. [155][156][157] As reviewed in Section 2, EGaIn has interesting properties which make it suitable for a large variety of applications which are discussed in this section. This section also introduces the working principles of EGaIn used in these applications briefly.…”

Section: Applications Of Egainmentioning

confidence: 99%

“…Based on the cone-shaped EGaIn top electrode, apart from rectification behavior, many properties of the charge transport of molecular layer devices have also been measured, such as the influence of anchoring groups, [204,205] influence of head-group substituents, [206][207][208][209][210][211] influence of environmental effects, [156,212,213] influence of thermal gradients for thermoelectric effects, [157,214] influence of bottom substrates, [215][216][217] quantum interference effects, [218][219][220][221] influence of dielectric properties of SAMs, [54,222,223] etc. Recently, Li et al introduce transition metal ions at one end of the molecule and used charge tunneling current density to study the non-covalent binding of ligands on the surface of the molecular layer, which provides a new tool for analyzing surface composition that undergoes reversible chemical reactions with species in solution.…”

Section: Egain Tip As Top Electrodementioning

confidence: 99%

“…Based on the cone‐shaped EGaIn top electrode, apart from rectification behavior, many properties of the charge transport of molecular layer devices have also been measured, such as the influence of anchoring groups, [ 204,205 ] influence of head‐group substituents, [ 206–211 ] influence of environmental effects, [ 156,212,213 ] influence of thermal gradients for thermoelectric effects, [ 157,214 ] influence of bottom substrates, [ 215–217 ] quantum interference effects, [ 218–221 ] influence of dielectric properties of SAMs, [ 54,222,223 ] etc. Recently, Li et al.…”

Section: Applications Of Egainmentioning

confidence: 99%

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Smart Eutectic Gallium–Indium: From Properties to Applications

et al. 2022

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Eutectic gallium–indium (EGaIn), a liquid metal with a melting point close to or below room temperature, has attracted extensive attention in recent years due to its excellent properties such as fluidity, high conductivity, thermal conductivity, stretchability, self‐healing capability, biocompatibility, and recyclability. These features of EGaIn can be adjusted by changing the experimental condition, and various composite materials with extended properties can be further obtained by mixing EGaIn with other materials. In this review, not only the are unique properties of EGaIn introduced, but also the working principles for the EGaIn‐based devices are illustrated and the developments of EGaIn‐related techniques are summarized. The applications of EGaIn in various fields, such as flexible electronics (sensors, antennas, electronic circuits), molecular electronics (molecular memory, opto‐electronic switches, or reconfigurable junctions), energy catalysis (heat management, motors, generators, batteries), biomedical science (drug delivery, tumor therapy, bioimaging and neural interfaces) are reviewed. Finally, a critical discussion of the main challenges for the development of EGaIn‐based techniques are discussed, and the potential applications in new fields are prospected.

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The influence of water on the charge transport through self-assembled monolayers junctions fabricated by EGaIn technique

Cited by 5 publications

References 55 publications

Scaling of quantum interference from single molecules to molecular cages and their monolayers

Scaling of quantum interference from single molecules to molecular cages and their monolayers

Plasmon‐Molecule Interactions in Single‐Molecule Junctions

Smart Eutectic Gallium–Indium: From Properties to Applications

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