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Optimised Power Harvesting by Controlling the Pressure Applied to Molecular Junctions

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Optimised Power Harvesting by Controlling the Pressure Applied to Molecular Junctions. / Wang, Xintai; Ismael, Ali; Almutlg, Ahmad et al.
In: Chemical Science, No. 14, 14.04.2021.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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Wang X, Ismael A, Almutlg A, Alshammari M, Al-Jobory A, Alshehab A et al. Optimised Power Harvesting by Controlling the Pressure Applied to Molecular Junctions. Chemical Science. 2021 Apr 14;(14). Epub 2021 Mar 4. doi: 10.1039/D1SC00672J

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@article{75ff545c93704ce7984353f459d98abf,
title = "Optimised Power Harvesting by Controlling the Pressure Applied to Molecular Junctions",
abstract = "A major potential advantage of creating thermoelectric devices using self-assembled molecular layers is their mechanical flexibility. Previous reports have discussed the advantage of this flexibility from the perspective of facile skin attachment and the ability to avoid mechanical deformation. In this work, we demonstrate that the thermoelectric properties of such molecular devices can be controlled by taking advantage of their mechanical flexibility. The thermoelectric properties of self-assembled monolayers (SAMs) fabricated from thiol terminated molecules were measured with a modified AFM system, and the conformation of the SAMs was controlled by regulating the loading force between the organic thin film and the probe, which changes the tilt angle at the metal-molecule interface. We tracked the thermopower shift vs. the tilt angle of the SAM and showed that changes in both the electrical conductivity and Seebeck coefficient combine to optimize the power factor at a specific angle. This optimization of thermoelectric performance via applied pressure is confirmed through the use of theoretical calculations and is expected to be a general method for optimising the power factor of SAMs.",
author = "Xintai Wang and Ali Ismael and Ahmad Almutlg and Majed Alshammari and Alaa Al-Jobory and Abdullah Alshehab and Troy Bennett and Luke Wilkinson and Cohen, {Lesley F.} and Long, {Nicholas J.} and Benjamin Robinson and Colin Lambert",
year = "2021",
month = apr,
day = "14",
doi = "10.1039/D1SC00672J",
language = "English",
journal = "Chemical Science",
issn = "2041-6520",
publisher = "Royal Society of Chemistry",
number = "14",

}

RIS

TY - JOUR

T1 - Optimised Power Harvesting by Controlling the Pressure Applied to Molecular Junctions

AU - Wang, Xintai

AU - Ismael, Ali

AU - Almutlg, Ahmad

AU - Alshammari, Majed

AU - Al-Jobory, Alaa

AU - Alshehab, Abdullah

AU - Bennett, Troy

AU - Wilkinson, Luke

AU - Cohen, Lesley F.

AU - Long, Nicholas J.

AU - Robinson, Benjamin

AU - Lambert, Colin

PY - 2021/4/14

Y1 - 2021/4/14

N2 - A major potential advantage of creating thermoelectric devices using self-assembled molecular layers is their mechanical flexibility. Previous reports have discussed the advantage of this flexibility from the perspective of facile skin attachment and the ability to avoid mechanical deformation. In this work, we demonstrate that the thermoelectric properties of such molecular devices can be controlled by taking advantage of their mechanical flexibility. The thermoelectric properties of self-assembled monolayers (SAMs) fabricated from thiol terminated molecules were measured with a modified AFM system, and the conformation of the SAMs was controlled by regulating the loading force between the organic thin film and the probe, which changes the tilt angle at the metal-molecule interface. We tracked the thermopower shift vs. the tilt angle of the SAM and showed that changes in both the electrical conductivity and Seebeck coefficient combine to optimize the power factor at a specific angle. This optimization of thermoelectric performance via applied pressure is confirmed through the use of theoretical calculations and is expected to be a general method for optimising the power factor of SAMs.

AB - A major potential advantage of creating thermoelectric devices using self-assembled molecular layers is their mechanical flexibility. Previous reports have discussed the advantage of this flexibility from the perspective of facile skin attachment and the ability to avoid mechanical deformation. In this work, we demonstrate that the thermoelectric properties of such molecular devices can be controlled by taking advantage of their mechanical flexibility. The thermoelectric properties of self-assembled monolayers (SAMs) fabricated from thiol terminated molecules were measured with a modified AFM system, and the conformation of the SAMs was controlled by regulating the loading force between the organic thin film and the probe, which changes the tilt angle at the metal-molecule interface. We tracked the thermopower shift vs. the tilt angle of the SAM and showed that changes in both the electrical conductivity and Seebeck coefficient combine to optimize the power factor at a specific angle. This optimization of thermoelectric performance via applied pressure is confirmed through the use of theoretical calculations and is expected to be a general method for optimising the power factor of SAMs.

U2 - 10.1039/D1SC00672J

DO - 10.1039/D1SC00672J

M3 - Journal article

JO - Chemical Science

JF - Chemical Science

SN - 2041-6520

IS - 14

ER -