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Large Converse Piezoelectric Effect Measured on a Single Molecule on a Metallic Surface.

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Title: Large Converse Piezoelectric Effect Measured on a Single Molecule on a Metallic Surface.
Authors: Stetsovych, Oleksandr1, Mutombo, Pingo1, Švec, Martin1,2, Šámal, Michal3, Nejedlý, Jindřich3, Císařová, Ivana4, Vázquez, Héctor1, Moro-Lagares, María1,2, Berger, Jan1, Vacek, Jaroslav3, Stará, Irena G.3, Starý, Ivo3 stary@uochb.cas.cz, Jelínek, Pavel1,2 pavel.jelinek@fzu.cz
Source: Journal of the American Chemical Society. 1/24/2018, Vol. 140 Issue 3, p940-946. 7p.
Subjects: Piezoelectricity, Electric properties of materials, Metallic surfaces, Single molecule research, Single molecules spectra, Molecular spectra, Atomic force microscopy, Density functional theory
Abstract: The converse piezoelectric effect is a phenomenon in which mechanical strain is generated in a material due to an applied electrical field. In this work, we demonstrate the converse piezoelectric effect in single heptahelicene-derived molecules on the Ag(111) surface using atomic force microscopy (AFM) and total energy density functional theory (DFT) calculations. The force-distance spectroscopy acquired over a wide range of bias voltages reveals a linear shift of the tip-sample distance at which the contact between the molecule and tip apex is established. We demonstrate that this effect is caused by the bias-induced deformation of the spring-like scaffold of the helical polyaromatic molecules. We attribute this effect to coupling of a soft vibrational mode of the molecular helix with a vertical electric dipole induced by molecule-substrate charge transfer. In addition, we also performed the same spectroscopic measurements on a more rigid o-carborane dithiol molecule on the Ag(111) surface. In this case, we identify a weaker linear electromechanical response, which underpins the importance of the helical scaffold on the observed piezoelectric response. [ABSTRACT FROM AUTHOR]
Copyright of Journal of the American Chemical Society is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: Large Converse Piezoelectric Effect Measured on a Single Molecule on a Metallic Surface.
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  Data: <searchLink fieldCode="AR" term="%22Stetsovych%2C+Oleksandr%22">Stetsovych, Oleksandr</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mutombo%2C+Pingo%22">Mutombo, Pingo</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Švec%2C+Martin%22">Švec, Martin</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Šámal%2C+Michal%22">Šámal, Michal</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Nejedlý%2C+Jindřich%22">Nejedlý, Jindřich</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Císařová%2C+Ivana%22">Císařová, Ivana</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Vázquez%2C+Héctor%22">Vázquez, Héctor</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Moro-Lagares%2C+María%22">Moro-Lagares, María</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Berger%2C+Jan%22">Berger, Jan</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Vacek%2C+Jaroslav%22">Vacek, Jaroslav</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Stará%2C+Irena+G%2E%22">Stará, Irena G.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Starý%2C+Ivo%22">Starý, Ivo</searchLink><relatesTo>3</relatesTo><i> stary@uochb.cas.cz</i><br /><searchLink fieldCode="AR" term="%22Jelínek%2C+Pavel%22">Jelínek, Pavel</searchLink><relatesTo>1,2</relatesTo><i> pavel.jelinek@fzu.cz</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+American+Chemical+Society%22">Journal of the American Chemical Society</searchLink>. 1/24/2018, Vol. 140 Issue 3, p940-946. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Piezoelectricity%22">Piezoelectricity</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+properties+of+materials%22">Electric properties of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Metallic+surfaces%22">Metallic surfaces</searchLink><br /><searchLink fieldCode="DE" term="%22Single+molecule+research%22">Single molecule research</searchLink><br /><searchLink fieldCode="DE" term="%22Single+molecules+spectra%22">Single molecules spectra</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+spectra%22">Molecular spectra</searchLink><br /><searchLink fieldCode="DE" term="%22Atomic+force+microscopy%22">Atomic force microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Density+functional+theory%22">Density functional theory</searchLink>
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  Data: The converse piezoelectric effect is a phenomenon in which mechanical strain is generated in a material due to an applied electrical field. In this work, we demonstrate the converse piezoelectric effect in single heptahelicene-derived molecules on the Ag(111) surface using atomic force microscopy (AFM) and total energy density functional theory (DFT) calculations. The force-distance spectroscopy acquired over a wide range of bias voltages reveals a linear shift of the tip-sample distance at which the contact between the molecule and tip apex is established. We demonstrate that this effect is caused by the bias-induced deformation of the spring-like scaffold of the helical polyaromatic molecules. We attribute this effect to coupling of a soft vibrational mode of the molecular helix with a vertical electric dipole induced by molecule-substrate charge transfer. In addition, we also performed the same spectroscopic measurements on a more rigid o-carborane dithiol molecule on the Ag(111) surface. In this case, we identify a weaker linear electromechanical response, which underpins the importance of the helical scaffold on the observed piezoelectric response. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of the American Chemical Society is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1021/jacs.7b08729
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      – Code: eng
        Text: English
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        PageCount: 7
        StartPage: 940
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      – SubjectFull: Piezoelectricity
        Type: general
      – SubjectFull: Electric properties of materials
        Type: general
      – SubjectFull: Metallic surfaces
        Type: general
      – SubjectFull: Single molecule research
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      – SubjectFull: Single molecules spectra
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      – SubjectFull: Molecular spectra
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      – SubjectFull: Atomic force microscopy
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      – SubjectFull: Density functional theory
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              Text: 1/24/2018
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