Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/112133
Title: Local Piezoelectric Properties of Doped Biomolecular Crystals
Authors: Kholkin, A.
Alikin, D.
Shur, V.
Dishon, S.
Ehre, D.
Lubomirsky, I.
Issue Date: 2021
Publisher: MDPI
MDPI AG
Citation: Local Piezoelectric Properties of Doped Biomolecular Crystals / A. Kholkin, D. Alikin, V. Shur et al. // Materials. — 2021. — Vol. 14. — Iss. 17. — 4922.
Abstract: Piezoelectricity is the ability of certain crystals to generate mechanical strain proportional to an external electric field. Though many biomolecular crystals contain polar molecules, they are frequently centrosymmetric, signifying that the dipole moments of constituent molecules cancel each other. However, piezoelectricity can be induced by stereospecific doping leading to symme-try reduction. Here, we applied piezoresponse force microscopy (PFM), highly sensitive to local piezoelectricity, to characterize( 010) faces of a popular biomolecular material, α-glycine, doped with other amino acids such as L-alanine and L-threonine as well as co-doped with both. We show that, while apparent vertical piezoresponse is prone to parasitic electrostatic effects, shear piezoelectric activity is strongly affected by doping. Undoped α-glycine shows no shear piezoelectric response at all. The shear response of the L-alanine doped crystals is much larger than those of the L-threonine doped crystals and co-doped crystals. These observations are rationalized in terms of host–guest molecule interactions. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Keywords: DOPING
PIEZOELECTRICITY
PIEZORESPONSE FORCE MICROSCOPY
Α-GLYCINE
AMINO ACIDS
CRYSTALLOGRAPHY
CRYSTALS
MOLECULES
PIEZOELECTRIC DEVICES
SCANNING PROBE MICROSCOPY
SHEAR FLOW
BIOMOLECULAR MATERIALS
ELECTROSTATIC EFFECT
EXTERNAL ELECTRIC FIELD
MECHANICAL STRAIN
PIEZOELECTRIC ACTIVITY
PIEZOELECTRIC PROPERTY
PIEZOELECTRIC RESPONSE
PIEZORESPONSE FORCE MICROSCOPY
PIEZOELECTRICITY
URI: http://hdl.handle.net/10995/112133
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85114094021
PURE ID: 23689691
ISSN: 1996-1944
metadata.dc.description.sponsorship: Funding: This work was supported by the collaborative program of the Israeli Ministry of Science with the Russian Foundation for Basic Research (RFBR), grant № 3-16492, and directly by the RFBR (grant № 19-52-06004 MNTI_a). The equipment of the Ural Center for Shared Use “Modern Nanotechnology” UrFU was used. A.K. acknowledges the Ministry of Science and Higher Education of the Russian Federation for the support under the project № 075-15-2021-588 from 1.06.2021. The work was also developed within the scope of the project CICECO at the Aveiro Institute of Materials, refs. UIDB/50011/2020 and UIDP/50011/2020, financed by national funds through the Portuguese Foundation for Science and Technology/MCTES. I.L. expresses his gratitude to the Estate of Olga Klein–Astrachan fund, grant № 721977.
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