Simultaneous Electrical and Mechanical Characterization of Single-Molecule Junctions Using AFM-BJ Technique

A versatile low-temperature setup for the electrical characterization of single-molecule junctions

Review of Scientific Instruments ◽

10.1063/1.3593100 ◽

2011 ◽

Vol 82 (5) ◽

pp. 053907 ◽

Cited By ~ 32

Author(s):

Christian A. Martin ◽

Roel H. M. Smit ◽

Ruud van Egmond ◽

Herre S. J. van der Zant ◽

Jan M. van Ruitenbeek

Keyword(s):

Low Temperature ◽

Single Molecule ◽

Electrical Characterization ◽

Single Molecule Junctions

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The Characterization of Electronic Noise in the Charge Transport through Single‐Molecule Junctions

Small Methods ◽

10.1002/smtd.202001064 ◽

2020 ◽

pp. 2001064

Author(s):

Saisai Yuan ◽

Tengyang Gao ◽

Wenqiang Cao ◽

Zhichao Pan ◽

Junyang Liu ◽

...

Keyword(s):

Charge Transport ◽

Single Molecule ◽

Electronic Noise ◽

Single Molecule Junctions

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Rapid and Robust Polyprotein Production Facilitates Single-Molecule Mechanical Characterization of β-Barrel Assembly Machinery Polypeptide Transport Associated Domains

ACS Nano ◽

10.1021/acsnano.5b01962 ◽

2015 ◽

Vol 9 (9) ◽

pp. 8811-8821 ◽

Cited By ~ 10

Author(s):

Toni Hoffmann ◽

Katarzyna M. Tych ◽

Thomas Crosskey ◽

Bob Schiffrin ◽

David J. Brockwell ◽

...

Keyword(s):

Single Molecule ◽

Mechanical Characterization

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Mechanical characterization of Trebisacce stone: preliminary results

Rendiconti online della Società Geologica Italiana ◽

10.3301/rol.2016.14 ◽

2016 ◽

Vol 38 ◽

pp. 47-50

Author(s):

Giulia Forestieri ◽

Maurizio Ponte

Keyword(s):

Mechanical Characterization ◽

Preliminary Results

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Massively Parallel Mechanical Characterization of Nanowires

10.26226/morressier.5f5f8e69aa777f8ba5bd5f86 ◽

2020 ◽

Author(s):

Rodrigo Bernal

Keyword(s):

Mechanical Characterization ◽

Massively Parallel

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Mechanically-Tunable Quantum Interference in Ferrocene-Based Single-Molecule Junctions

10.26434/chemrxiv.12252059 ◽

2020 ◽

Author(s):

María Camarasa-Gómez ◽

Daniel Hernangómez-Pérez ◽

Michael S. Inkpen ◽

Giacomo Lovat ◽

E-Dean Fung ◽

...

Keyword(s):

Single Molecule ◽

Quantum Interference ◽

Degrees Of Freedom ◽

Building Blocks ◽

Ferrocene Derivative ◽

Single Molecule Junctions ◽

Molecule Junction ◽

Single Molecule Junction ◽

The Impact ◽

D Orbitals

Ferrocenes are ubiquitous organometallic building blocks that comprise a Fe atom sandwiched between two cyclopentadienyl (Cp) rings that rotate freely at room temperature. Of widespread interest in fundamental studies and real-world applications, they have also attracted some interest as functional elements of molecular-scale devices. Here we investigate the impact of the configurational degrees of freedom of a ferrocene derivative on its single-molecule junction conductance. Measurements indicate that the conductance of the ferrocene derivative, which is suppressed by two orders of magnitude as compared to a fully conjugated analog, can be modulated by altering the junction configuration. Ab initio transport calculations show that the low conductance is a consequence of destructive quantum interference effects that arise from the hybridization of metal-based d-orbitals and the ligand-based π-system. By rotating the Cp rings, the hybridization, and thus the quantum interference, can be mechanically controlled, resulting in a conductance modulation that is seen experimentally.

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Charge Transfer Complexation Boosts Molecular Conductance Through Fermi Level Pinning

10.26434/chemrxiv.7110788 ◽

2018 ◽

Author(s):

Kun Wang ◽

Andrea Vezzoli ◽

Iain Grace ◽

Maeve McLaughlin ◽

Richard Nichols ◽

...

Keyword(s):

Charge Transfer ◽

Single Molecule ◽

Quantum Interference ◽

Transmission Function ◽

Scanning Tunneling ◽

Charge Transfer Complexes ◽

Tunneling Microscopy ◽

Quantum Interference Effect ◽

Single Molecule Junctions ◽

Charge Transfer Complexation

We have used scanning tunneling microscopy to create and study single molecule junctions with thioether-terminated oligothiophene molecules. We find that the conductance of these junctions increases upon formation of charge transfer complexes of the molecules with tetracyanoethene, and that the extent of the conductance increase is greater the longer is the oligothiophene, i.e. the lower is the conductance of the uncomplexed molecule in the junction. We use non-equilibrium Green's function transport calculations to explore the reasons for this theoretically, and find that new resonances appear in the transmission function, pinned close to the Fermi energy of the contacts, as a consequence of the charge transfer interaction. This is an example of a room temperature quantum interference effect, which in this case boosts junction conductance in contrast to earlier observations of QI that result in diminished conductance.

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Spectro-mechanical Characterization of Aromaticity and Maturity of Kerogens in Oil Shale at 6 nm Spatial Resolution

10.26434/chemrxiv.7336160 ◽

2018 ◽

Author(s):

Devon Jakob ◽

Le Wang ◽

Haomin Wang ◽

Xiaoji Xu

Keyword(s):

Spatial Resolution ◽

Oil Shale ◽

Infrared Imaging ◽

Mechanical Characterization ◽

Optical Diffraction ◽

Chemical Compositions ◽

Valuable Insight ◽

Eagle Ford Shale

In situ measurements of the chemical compositions and mechanical properties of kerogen help understand the formation, transformation, and utilization of organic matter in the oil shale at the nanoscale. However, the optical diffraction limit prevents attainment of nanoscale resolution using conventional spectroscopy and microscopy. Here, we utilize peak force infrared (PFIR) microscopy for multimodal characterization of kerogen in oil shale. The PFIR provides correlative infrared imaging, mechanical mapping, and broadband infrared spectroscopy capability with 6 nm spatial resolution. We observed nanoscale heterogeneity in the chemical composition, aromaticity, and maturity of the kerogens from oil shales from Eagle Ford shale play in Texas. The kerogen aromaticity positively correlates with the local mechanical moduli of the surrounding inorganic matrix, manifesting the Le Chatelier’s principle. In situ spectro-mechanical characterization of oil shale will yield valuable insight for geochemical and geomechanical modeling on the origin and transformation of kerogen in the oil shale.

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