Rectifying Electron-Transport Properties through Stacks of Aromatic Molecules Inserted into a Self-Assembled Cage

Fujii, Shintaro; Tada, Tomofumi; Komoto, Yuki; Osuga, Takafumi; Murase, Takashi; Fujita, Makoto; Kiguchi, Manabu

doi:10.1021/jacs.5b00086

Cited by 135 publications

(87 citation statements)

References 51 publications

(110 reference statements)

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“…[5][6][7][8][9][10][11] Currently, various functionalities have been reported for single atomic and molecular junctions, where a single atom or molecule is bridged between metal electrodes. 10,[12][13][14][15] While there have been enormous studies of the single molecular junctions with a variety of molecules, the atomic and electronic structures of the single molecular junction were not fully characterized with experimental techniques. The atomic structure of the single molecular junctions has been discussed by comparing the experimentally obtained conductance values with the theoretical values obtained using possible model structures in most of studies.…”

Section: Introductionmentioning

confidence: 99%

Atomic and Electronic Structures of a Single Oxygen Molecular Junction with Au, Ag, and Cu Electrodes

et al. 2016

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Fabrication of oxygen molecular junctions was demonstrated for a series of single metal wires of Au, Ag, and Cu using the mechanically controllable break junction method at low temperature (10K). On the basis of conductance measurement, vibrational spectroscopy, and current-voltage (I-V) response of the molecular junctions, we provide experimental evidence that the oxygen can incorporate into the metal wires to form single oxygen molecular junctions. Conductance behavior during elongation process of the molecular junctions revealed the formation of single one dimensional wire. The incorporation of oxygen into the metal wires was demonstrated in vibrational spectroscopy and I-V response measurements. Furthermore detailed analysis of the I-V response based on the single channel transport model allowed us to quantitatively evaluate electronic properties of the molecular junctions as metal-molecule electronic couplings and an energy level of a transport channel. The present study demonstrated that oxygen can interact with atomic wires of the noble metals and could provide insight into oxidation process of low dimensional materials.

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Section: Introductionmentioning

confidence: 99%

Atomic and Electronic Structures of a Single Oxygen Molecular Junction with Au, Ag, and Cu Electrodes

et al. 2016

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“…The single-molecule diode with a host–guest system has been demonstrated using a self-assembled molecular cage containing aromatic stacks [46]. In typical single-molecule diodes, the molecules in the junction were connected by chemical bonds, and therefore the entire electronic functionality was unchanged.…”

Section: Single Molecular Diodementioning

confidence: 99%

“…The arrows indicate sharp peaks with a rectification factor of one for the homocomplex (blue). In addition to a peak with a rectification factor of one, broad distributions with rectification factors of approximately 0.73 and 1.38 are indicated by arrows for the heterocomplex (red) [46]. …”

Section: Figurementioning

confidence: 99%

Molecular Diode Studies Based on a Highly Sensitive Molecular Measurement Technique

Iwane

Fujii

Kiguchi

2017

Sensors

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In 1974, molecular electronics pioneers Mark Ratner and Arieh Aviram predicted that a single molecule could act as a diode, in which electronic current can be rectified. The electronic rectification property of the diode is one of basic functions of electronic components and since then, the molecular diode has been investigated as a first single-molecule device that would have a practical application. In this review, we first describe the experimental fabrication and electronic characterization techniques of molecular diodes consisting of a small number of molecules or a single molecule. Then, two main mechanisms of the rectification property of the molecular diode are discussed. Finally, representative results for the molecular diode are reviewed and a brief outlook on crucial issues that need to be addressed in future research is discussed.

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“…75 While there are various single molecular electronic devices, their entire electronic functionality was invariable. 815 One of the important advantages of molecular devices is the ease of functionalization due to the diversity of molecules.…”

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confidence: 99%

Governing the Metal–Molecule Interface: Towards New Functionality in Single-Molecule Junctions

Kiguchi¹,

Fujii²

2016

Bulletin of the Chemical Society of Japan

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Single-molecule junctions, in which a single molecule bridges a gap between metal electrodes, have attracted significant attention due to their potential applications in ultrasmall electronic devices and their unique structure. Singlemolecule junctions are one-dimensional nanomaterials having two metalmolecule interfaces. Thus, unconventional properties and functionalities that would not be observed in other phases (e.g., isolated molecules and bulk crystals) are expected to appear in these nanomaterials. Despite interest in these expected unconventional properties, several issues have been noted with the investigation and practical application of the unique properties of single-molecule junctions.To explore new functionality, we have investigated singlemolecule junctions using a combined approach comprising fabrication, characterization, and measurement. First, we have explored a new generation of the metalmolecule interfaces formed by direct π-bonding. The interfaces made by the direct π-bonding have increased electronic conductance at the singlemolecule junction, reaching the theoretical limit, 1 G 0 (2e 2 /h), which is the conductance of typical metal monoatomic contacts. Secondly, we have developed new characterization techniques combined with a variety of spectroscopic methods to observe a single molecule confined between metal electrodes. This has allowed us to reveal structural and electronic details of single-molecule junctions, such as the number of molecules, molecular species, interface-structure, electronic structure, and dynamics. Based on the development of the metalmolecule interface structures and the combined spectroscopic characterization techniques, we have searched for new single-molecule junction functionality. By controlling the metalmolecule interface structures, single molecular switching functionality with multiple conductance states and a programmable singlemolecule junction with various electronic functionalities have been realized. Our newly developed interface structure, characterization technique, and the functionality of the singlemolecule junction opens the door for future research in the field of single-molecule junctions.

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Rectifying Electron-Transport Properties through Stacks of Aromatic Molecules Inserted into a Self-Assembled Cage

Cited by 135 publications

References 51 publications

Atomic and Electronic Structures of a Single Oxygen Molecular Junction with Au, Ag, and Cu Electrodes

Atomic and Electronic Structures of a Single Oxygen Molecular Junction with Au, Ag, and Cu Electrodes

Molecular Diode Studies Based on a Highly Sensitive Molecular Measurement Technique

Governing the Metal–Molecule Interface: Towards New Functionality in Single-Molecule Junctions

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