Multivariate Approach to Single-Molecule Thermopower and Electrical Conductance Measurements

2021 ◽  
Author(s):  
Joseph M. Hamill ◽  
Christopher Weaver ◽  
Tim Albrecht
Keyword(s):  
Single Molecule ◽  
Electrical Conductance ◽  
Multivariate Approach

scholarly journals Single-molecule conductance oscillations in alkane rings

2019 ◽  
Vol 7 (22) ◽  
pp. 6578-6581 ◽  
Author(s):  
Ali K. Ismael ◽  
Colin J. Lambert
Keyword(s):  
Single Molecule ◽  
Electrical Conductance ◽  
Gold Electrodes

We investigate the single-molecule electrical conductance of alkane rings connected to gold electrodes and demonstrate that their logarithmic conductances are ocillatory functions of length.

Electrical Conductance of Conjugated Oligomers at the Single Molecule Level

2008 ◽  
Vol 130 (3) ◽  
pp. 1080-1084 ◽  
Author(s):  
Roman Huber ◽  
Maria Teresa González ◽  
Songmei Wu ◽  
Michael Langer ◽  
Sergio Grunder ◽  
...  
Keyword(s):  
Single Molecule ◽  
Electrical Conductance ◽  
Conjugated Oligomers ◽  
Single Molecule Level

Single-molecule determination of chemical equilibrium of DNA intercalation by electrical conductance

2021 ◽  
Author(s):  
Lu Zhang ◽  
Satoshi Kaneko ◽  
Shintaro Fujii ◽  
Manabu Kiguchi ◽  
Tomoaki Nishino
Keyword(s):  
Single Molecule ◽  
Chemical Equilibrium ◽  
Electrical Conductance ◽  
Dna Intercalation ◽  
Molecule Reaction ◽  
Association Reaction

We investigated a single-molecule reaction of DNA intercalation as an example of a bimolecular association reaction. Single-molecule conductance values of the product and reactant molecules adsorbed on an Au surface...

scholarly journals Large-Amplitude, High-Frequency Single-Molecule Switch

2018 ◽  
Author(s):  
Nicolò Ferri ◽  
Norah Algethami ◽  
Andrea Vezzoli ◽  
Sara Sangtarash ◽  
Maeve McLaughlin ◽  
...  
Keyword(s):  
Contact Interaction ◽  
Single Molecule ◽  
Scanning Tunneling Microscope ◽  
High Frequency ◽  
Large Amplitude ◽  
Electrical Conductance ◽  
Molecular Junctions ◽  
Switching Behavior ◽  
Scanning Tunneling ◽  
Tunneling Microscope

We use a scanning tunneling microscope to form and electrically interrogate metal - molecule - metal junctions. To form such junctions, molecules must be functionalised with suitable contact groups (e.g. thiols, thioethers, 4-pyridyls, amines) at each extremity. We show here that 2-(methylthio)thiophene units not only act as contact groups, but can reversibly switch between a monodentate configuration (MeS-only) and a bidentate configuration (MeS- and thienyl S) upon junction compression; as the junction is compressed the electrical conductance increases greatly with the increased molecule-contact interaction. This means that such molecules show a large-amplitude mechanical switching behavior; we also show that this is reversible and that switching can occur at a rate of at least 10 kHz. Control molecules with MeSC6H5 contact groups do not show this behavior. This, together with detailed theoretical and transport calculations on the compressed and extended molecular junctions, supports our contention that it is the thienyl S that is involved in the switching mechanism. <br>

scholarly journals Connectivity dependent thermopower of bridged biphenyl molecules in single-molecule junctions

Nanoscale ◽  
2020 ◽  
Vol 12 (27) ◽  
pp. 14682-14688 ◽  
Author(s):  
Iain M. Grace ◽  
Gunnar Olsen ◽  
Juan Hurtado-Gallego ◽  
Laura Rincón-García ◽  
Gabino Rubio-Bollinger ◽  
...  
Keyword(s):  
Seebeck Coefficient ◽  
Single Molecule ◽  
Scanning Tunneling Microscope ◽  
Electrical Conductance ◽  
Scanning Tunneling ◽  
Break Junction ◽  
Tunneling Microscope ◽  
Single Molecule Junctions

We report measurements on gold|single-molecule|gold junctions, using a modified scanning tunneling microscope-break junction (STM-BJ) technique, of the Seebeck coefficient and electrical conductance of a series of bridged biphenyl molecules.

Electrical conductance study on 1,3-butadiyne-linked dinuclear ruthenium(ii) complexes within single molecule break junctions

2013 ◽  
Vol 4 (6) ◽  
pp. 2471 ◽  
Author(s):  
Hui-Min Wen ◽  
Yang Yang ◽  
Xiao-Shun Zhou ◽  
Jun-Yang Liu ◽  
Dao-Bin Zhang ◽  
...  
Keyword(s):  
Single Molecule ◽  
Electrical Conductance ◽  
Break Junctions ◽  
Dinuclear Ruthenium

scholarly journals Development of Single-Molecule Electrical Identification Method for Cyclic Adenosine Monophosphate Signaling Pathway

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 784
Author(s):  
Yuki Komoto ◽  
Takahito Ohshiro ◽  
Masateru Taniguchi
Keyword(s):  
Machine Learning ◽  
Signaling Pathway ◽  
Single Molecule ◽  
Intracellular Signaling ◽  
Second Messengers ◽  
Electrical Conductance ◽  
Structural Difference ◽  
Cyclic Adenosine Monophosphate ◽  
Adenosine Monophosphate ◽  
Intracellular Signaling Pathway

Cyclic adenosine monophosphate (cAMP) is an important research target because it activates protein kinases, and its signaling pathway regulates the passage of ions and molecules inside a cell. To detect the chemical reactions related to the cAMP intracellular signaling pathway, cAMP, adenosine triphosphate (ATP), adenosine monophosphate (AMP), and adenosine diphosphate (ADP) should be selectively detected. This study utilized single-molecule quantum measurements of these adenosine family molecules to detect their individual electrical conductance using nanogap devices. As a result, cAMP was electrically detected at the single molecular level, and its signal was successfully discriminated from those of ATP, AMP, and ADP using the developed machine learning method. The discrimination accuracies of a single cAMP signal from AMP, ADP, and ATP were found to be 0.82, 0.70, and 0.72, respectively. These values indicated a 99.9% accuracy when detecting more than ten signals. Based on an analysis of the feature values used for the machine learning analysis, it is suggested that this discrimination was due to the structural difference between the ribose of the phosphate site of cAMP and those of ATP, ADP, and AMP. This method will be of assistance in detecting and understanding the intercellular signaling pathways for small molecular second messengers.

scholarly journals Elementary processes of DNA surface hybridization resolved by single-molecule kinetics: implication for macroscopic device performance

2021 ◽  
Author(s):  
Takanori Harashima ◽  
Yusuke Hasegawa ◽  
Satoshi Kaneko ◽  
Yuki Jono ◽  
Shintaro Fujii ◽  
...  
Keyword(s):  
Single Molecule ◽  
Electrical Conductance ◽  
Device Performance ◽  
Elementary Processes ◽  
Dna Concentration ◽  
Dna Molecule ◽  
Hybridization Efficiency ◽  
Single Dna Molecule

Hybridization of a single DNA molecule on a surface was investigated by electrical conductance measurements. The hybridization efficiency increases with increasing the DNA concentration, in contrast to preceding studies with ensemble studies.

scholarly journals Large-Amplitude, High-Frequency Single-Molecule Switch

2018 ◽  
Author(s):  
Nicolò Ferri ◽  
Norah Algethami ◽  
Andrea Vezzoli ◽  
Sara Sangtarash ◽  
Maeve McLaughlin ◽  
...  
Keyword(s):  
Contact Interaction ◽  
Single Molecule ◽  
Scanning Tunneling Microscope ◽  
High Frequency ◽  
Large Amplitude ◽  
Electrical Conductance ◽  
Molecular Junctions ◽  
Switching Behavior ◽  
Scanning Tunneling ◽  
Tunneling Microscope

We use a scanning tunneling microscope to form and electrically interrogate metal - molecule - metal junctions. To form such junctions, molecules must be functionalised with suitable contact groups (e.g. thiols, thioethers, 4-pyridyls, amines) at each extremity. We show here that 2-(methylthio)thiophene units not only act as contact groups, but can reversibly switch between a monodentate configuration (MeS-only) and a bidentate configuration (MeS- and thienyl S) upon junction compression; as the junction is compressed the electrical conductance increases greatly with the increased molecule-contact interaction. This means that such molecules show a large-amplitude mechanical switching behavior; we also show that this is reversible and that switching can occur at a rate of at least 10 kHz. Control molecules with MeSC6H5 contact groups do not show this behavior. This, together with detailed theoretical and transport calculations on the compressed and extended molecular junctions, supports our contention that it is the thienyl S that is involved in the switching mechanism. <br>

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