Local Piezoelectric Properties of Doped Biomolecular Crystals

Local Piezoelectric Properties of Doped Biomolecular Crystals

Bibliografiske detaljer
Parent link:Materials
Vol. 14, iss. 17.— 2021.— [4922, 7 p.]
Institution som forfatter: Национальный исследовательский Томский политехнический университет Исследовательская школа химических и биомедицинских технологий
Andre forfattere: Kholkin A. L. Andrei Leonidovich, Alikin D. Denis, Shur V. Ya. Vladimir, Shiri D. Dishon, Ehre D. David, Lubomirsky I. Igor
Summary:Title screen
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 symmetry reduction. Here, we applied piezoresponse force microscopy (PFM), highly sensitive to local piezoelectricity, to characterize (01?0) faces of a popular biomolecular material, ?-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 ?-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.
Sprog:engelsk
Udgivet: 2021
Fag:
электронный ресурс
труды учёных ТПУ
α-glycine
piezoelectricity
doping
piezoresponse force microscopy
глицин
пьезоэлектричество
допинг
силовая микроскопия
Online adgang:https://doi.org/10.3390/ma14174922
Format: Electronisk Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=667910

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