Large Converse Piezoelectric Effect Measured on a Single Molecule on a Metallic Surface.
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 (A...
| Publicado en: | Journal of the American Chemical Society Vol. 140; no. 3; pp. 940 - 947 |
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| Autores principales: | , , , , , , , , , , , , |
| Formato: | Artículo |
| Publicado: |
American Chemical Society
1/24/2018
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=127646873&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 127646873 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 1/24/2018 vid: 140 iid: 3 pid: 997 pub: American Chemical Society artinfo: ui: 127646873 10.1021/jacs.7b08729 ppf: 940 ppct: 7 formats: tig: atl: Large Converse Piezoelectric Effect Measured on a Single Molecule on a Metallic Surface. aug: au: Stetsovych, Oleksandr Mutombo, Pingo Švec, Martin Šámal, Michal Nejedlý, Jindřich Císařová, Ivana Vázquez, Héctor Moro-Lagares, María Berger, Jan Vacek, Jaroslav Stará, Irena G. Starý, Ivo Jelínek, Pavel affil: Institute of Physics of the Czech Academy of Sciences, Cukrovarnickaá10, 18221 Prague 6, Czech Republic Regional Center of Advanced Technologies and Materials, Palacký University, 77147 Olomouc, Czech Republic Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nám. 2, 16610 Prague 6, Czech Republic Department of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, 12843 Prague 2, Czech Republic su: Piezoelectricity Electric properties of materials Metallic surfaces Single molecule research Single molecules spectra Molecular spectra Atomic force microscopy Density functional theory sug: subj: Piezoelectricity Electric properties of materials Metallic surfaces Single molecule research Single molecules spectra Molecular spectra Atomic force microscopy Density functional theory ab: 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. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2018 holdings: @attributes: islocal: N |
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