Electronic Transport in Single Molecule Junctions:  Control of the Molecule-Electrode Coupling through Intramolecular Tunneling Barriers

Nano Letters ◽  
2008 ◽  
Vol 8 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Andrey Danilov ◽  
Sergey Kubatkin ◽  
Sergey Kafanov ◽  
Per Hedegård ◽  
Nicolai Stuhr-Hansen ◽  
...  
Keyword(s):  
Single Molecule ◽  
Electronic Transport ◽  
Single Molecule Junctions

Electronic transport, transition-voltage spectroscopy, and the Fano effect in single molecule junctions composed of a biphenyl molecule attached to metallic and semiconducting carbon nanotube electrodes

2014 ◽  
Vol 16 (36) ◽  
pp. 19602-19607 ◽  
Author(s):  
Carlos Alberto Brito da Silva Júnior ◽  
José Fernando Pereira Leal ◽  
Vicente Ferrer Pureza Aleixo ◽  
Felipe A. Pinheiro ◽  
Jordan Del Nero
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Single Molecule ◽  
Electronic Transport ◽  
Fano Effect ◽  
Single Molecule Junctions ◽  
Transition Voltage ◽  
Transport Transition ◽  
Transition Voltage Spectroscopy

We investigate electronic transport in semiconductor–molecule–metal junctions consisting of a biphenyl molecule attached to a p-doped semiconductor and metallic carbon nanotubes.

Thermoelectricity at the Organic-Inorganic Interface

2010 ◽  
Author(s):  
Shannon Yee ◽  
Jonathan Malen ◽  
Pramod Reddy ◽  
Rachel Segalman ◽  
Arun Majumdar
Keyword(s):  
Single Molecule ◽  
Electronic Transport ◽  
Energy Transport ◽  
Chemical Potential ◽  
Surface States ◽  
Scanning Tunneling ◽  
The Past ◽  
Single Molecule Junctions ◽  
Electronic Conductance ◽  
Inorganic Components

Electronic transport in molecular junctions has been studied through measurements of junction thermopower to evaluate the feasibility of thermoelectric (TE) energy generation using organic-inorganic hybrid materials. Energy transport and conversion in these junctions are heavily influenced by transport interactions at the metal-molecule interface. At this interface the discrete molecular orbitals overlap with continuum electronic states in the inorganic electrodes to create unique energy landscapes that cannot be realized in the organic or inorganic components alone. Over the past decade, scanning probe microscopes have been used to study the electronic conductance of single-molecule junctions[1–5]. Recently, we conducted measurements of junction thermopower using a modified scanning tunneling microscope (STM)[6]. Through our investigations, we have determined: (i) how the addition of molecular substituent groups can be used to predictably tune the TE properties of phenylenedithiol (PDT) junctions[7], (ii) how the length, molecular backbone, and end groups affect junction thermopower[8], and (iii) where electronic transport variations originate[9]. Furthermore, we have recently found that large (10 fold) TE enhancement can be achieved by effectively altering a (noble) metal junction using fullerenes (i.e., C60, PCBM, and C70). We associate the enhancement with the alignment of the frontier orbitals of the fullerene to the chemical potential of the inorganic electrodes. We further found that the thermopower can be predictably tuned by varying the work function of the contacts. This yields considerable promise for altering the surface states at interfaces for enhanced electronic and thermal transport. This paper highlights our work using thermopower as a probe for electronic transport, and reports preliminary results of TE conversion in fullerene-metal junctions.

Single-molecule junctions beyond electronic transport

2013 ◽  
Vol 8 (6) ◽  
pp. 399-410 ◽  
Author(s):  
Sriharsha V. Aradhya ◽  
Latha Venkataraman
Keyword(s):  
Single Molecule ◽  
Electronic Transport ◽  
Single Molecule Junctions

Importance of Direct Metal−π Coupling in Electronic Transport Through Conjugated Single-Molecule Junctions

2012 ◽  
Vol 134 (50) ◽  
pp. 20440-20445 ◽  
Author(s):  
Jeffrey S. Meisner ◽  
Seokhoon Ahn ◽  
Sriharsha V. Aradhya ◽  
Markrete Krikorian ◽  
Radha Parameswaran ◽  
...  
Keyword(s):  
Single Molecule ◽  
Electronic Transport ◽  
Single Molecule Junctions

Electronic transport and mechanical stability of carboxyl linked single-molecule junctions

2012 ◽  
Vol 14 (40) ◽  
pp. 13841 ◽  
Author(s):  
Seokhoon Ahn ◽  
Sriharsha V. Aradhya ◽  
Rebekka S. Klausen ◽  
Brian Capozzi ◽  
Xavier Roy ◽  
...  
Keyword(s):  
Single Molecule ◽  
Electronic Transport ◽  
Mechanical Stability ◽  
Single Molecule Junctions

scholarly journals Electronic transport through single-molecule oligophenyl-diethynyl junctions with direct gold - carbon bonds formed at low temperature

2021 ◽  
Author(s):  
Gautam Mitra ◽  
Vincent Delmas ◽  
Hassan Al Sabea ◽  
Lucie Norel ◽  
Olivier GALANGAU ◽  
...  
Keyword(s):  
Low Temperature ◽  
Single Molecule ◽  
Electronic Transport ◽  
Break Junction ◽  
Transport Study ◽  
Carbon Bonds ◽  
Single Molecule Junctions

We report on the first systematic transport study of alkynyl-ended oligophenyl-diethynyl (OPA) single-molecule junctions with direct Au--C anchoring scheme at low temperature using the mechanically controlled break junction technique. Through...

scholarly journals Effect of Asymmetric Anchoring Groups on Electronic Transport in Hybrid Metal/Molecule/Graphene Single Molecule Junctions

ChemPhysChem ◽  
2019 ◽  
Vol 20 (14) ◽  
pp. 1830-1836 ◽  
Author(s):  
Chunhui He ◽  
Qian Zhang ◽  
Yinqi Fan ◽  
Cezhou Zhao ◽  
Chun Zhao ◽  
...  
Keyword(s):  
Single Molecule ◽  
Electronic Transport ◽  
Single Molecule Junctions ◽  
Anchoring Groups

scholarly journals Electronic conduction during the formation stages of a single-molecule junction

2018 ◽  
Vol 9 ◽  
pp. 1471-1477 ◽  
Author(s):  
Atindra Nath Pal ◽  
Tal Klein ◽  
Ayelet Vilan ◽  
Oren Tal
Keyword(s):  
Single Molecule ◽  
Electronic Transport ◽  
Noise Analysis ◽  
Atomic Scale ◽  
Single Atom ◽  
Inelastic Electron ◽  
Single Molecule Junctions ◽  
Molecule Junction ◽  
Single Molecule Junction ◽  
Silver Electrodes

Single-molecule junctions are versatile test beds for electronic transport at the atomic scale. However, not much is known about the early formation steps of such junctions. Here, we study the electronic transport properties of premature junction configurations before the realization of a single-molecule bridge based on vanadocene molecules and silver electrodes. With the aid of conductance measurements, inelastic electron spectroscopy and shot noise analysis, we identify the formation of a single-molecule junction in parallel to a single-atom junction and examine the interplay between these two conductance pathways. Furthermore, the role of this structure in the formation of single-molecule junctions is studied. Our findings reveal the conductance and structural properties of premature molecular junction configurations and uncover the different scenarios in which a single-molecule junction is formed. Future control over such processes may pave the way for directed formation of preferred junction structures.

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