Local Piezoelectric Properties of Doped Biomolecular Crystals; Materials; Vol. 14, iss. 17

Local Piezoelectric Properties of Doped Biomolecular Crystals; Materials; Vol. 14, iss. 17

Bibliografiska uppgifter
Parent link:	Materials Vol. 14, iss. 17.— 2021.— [4922, 7 p.]
Institutionell upphovsman:	Национальный исследовательский Томский политехнический университет Исследовательская школа химических и биомедицинских технологий
Övriga upphovsmän:	Kholkin A. L. Andrei Leonidovich, Alikin D. Denis, Shur V. Ya. Vladimir, Shiri D. Dishon, Ehre D. David, Lubomirsky I. Igor
Sammanfattning:	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.
Språk:	engelska
Publicerad:	2021
Ämnen:	электронный ресурс труды учёных ТПУ α-glycine piezoelectricity doping piezoresponse force microscopy глицин пьезоэлектричество допинг силовая микроскопия
Länkar:	https://doi.org/10.3390/ma14174922
Materialtyp:	Elektronisk Bokavsnitt
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=667910

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