Journal of the American Chemical Society p. 940 - 946 (2018)
Update date:2022-08-11
Topics:
Stetsovych, Oleksandr
Mutombo, Pingo
?vec, Martin
?ámal, Michal
Nejedly, Jind?ich
Císa?ová, Ivana
Vázquez, Héctor
Moro-Lagares, María
Berger, Jan
Vacek, Jaroslav
Stará, Irena G.
Stary, Ivo
Jelínek, Pavel
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.
View MoreShanghai Bojing Chemical Co., Ltd.
Contact:021-37122233
Address:6F Buildiing 11,No.388,Baifu Road,District Fengxian.Shanghai, China.
Contact:+86-27-87204219, +86-27-87215023
Address:2402, HuiGu Space-time Building, 8 Forest Road, East Lake Hi-Tech Development Zone
shijiazhuang alkay chemicals co..ltd
Contact:86-311-67692035
Address:2601,juntang building,qiaodong district,shijiazhuang
Taizhou volsen chemical Co., Ltd
website:http://www.volsenchem.com
Contact:+86-576-88869393
Address:Jiaojiang District, Taizhou, Zhejiang, China.
website:http://www.afinechem.com
Contact:+86-571-85134551
Address:No. 206 Zhen Hua Road, Hangzhou 310030, Zhejiang, China
Doi:10.1016/j.procbio.2014.04.013
(2014)Doi:10.1016/j.tetasy.2005.03.030
(2005)Doi:10.1039/c8cc02193g
(2018)Doi:10.1039/c8cc04954h
(2018)Doi:10.1039/c3dt50881a
(2013)Doi:10.1016/S0040-4039(00)89329-6
(1970)