Investigation of the geometrical arrangement and single molecule charge transport in self-assembled monolayers of molecular towers based on tetraphenylmethane tripod

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F17%3A00484210" target="_blank" >RIV/61388955:_____/17:00484210 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.electacta.2017.11.174" target="_blank" >http://dx.doi.org/10.1016/j.electacta.2017.11.174</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2017.11.174" target="_blank" >10.1016/j.electacta.2017.11.174</a>

Result language

angličtina

Original language name

Investigation of the geometrical arrangement and single molecule charge transport in self-assembled monolayers of molecular towers based on tetraphenylmethane tripod

Original language description

Multipodal molecular platforms were designed recently to establish a well-defined contact between molecular electronic components and metallic electrodes to manufacture working devices based on molecular electronics. In this work, we use electrochemical techniques, scanning tunneling microscopy break junction technique and theoretical approaches combining density functional theory (DFT) and non-equilibrium Green's function (NEGF) formalism to investigate the geometrical arrangement and single molecule charge transport in self-assembled monolayers (SAMs) of molecular towers anchored by tetraphenylmethane tripod on Au (111) surface. The effect of the molecular length as well as the role of the position of anchoring groups was addressed. Electrochemical double-layer capacitance measurements and reductive desorption studies combined with theoretical modeling clearly demonstrated that the molecular towers form densely packed SAMs, in which the individual molecules are attached to the Au (111) surface by the tripodal base and the principal molecular axis is directed away from the electrode surface, providing thus desired orientation. Temperature resolved single molecule conductance measurements combined with DFT/NEGF calculations showed that the electric charge is transported by tunneling via highly conductive molecular junctions formed by the tripodal base. Our combined experimental and theoretical work demonstrates that tetraphenylmethane tripods are suitable platforms to bear functional groups serving as molecular electronic components. (C) 2017 Elsevier Ltd. All rights reserved.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project

<a href="/en/project/GJ16-07460Y" target="_blank" >GJ16-07460Y: Study of electron transport in electrochemically controlled molecular switches</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Electrochimica acta

ISSN

0013-4686

e-ISSN

—

Volume of the periodical

258

Issue of the periodical within the volume

DEC 20

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

1191-1200

UT code for WoS article

000418324800132

EID of the result in the Scopus database

2-s2.0-85036620451