The natural ability of peptides and proteins to self-assemble into elongated fibrils is associated with several neurogenerative diseases. Diphenylalanine (FF) tubular structures that have the same structural motif as in Aβ-amyloid peptide (involved in Alzheimer's disease) are shown to possess remarkable physical properties ranging from piezoelectricity to electrochemical activities. In this work, we also discover a significant pyroelectric activity and measure the temperature dependence of the pyroelectric coefficient in the temperature range of 20–100 °C. Pyroelectric activity decreases with temperature contrary to most ferroelectric materials and significant relaxation of pyrocurrent is observed on cooling after heating above 50 °C. This unusual behavior is assigned to the temperature-induced disorder of water molecules inside the nanochannels. Pyroelectric coefficient and current and voltage figures of merit are estimated and future applications of pyroelectric peptide nanostructures in biomedical applications are outlined.
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Pyroelectric effect and polarization instability in self-assembled diphenylalanine microtubes
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3 October 2016
Research Article|
October 04 2016
Pyroelectric effect and polarization instability in self-assembled diphenylalanine microtubes
A. Esin;
A. Esin
1Institute of Natural Sciences and Mathematics,
Ural Federal University
, 620000 Ekaterinburg, Russia
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I. Baturin
;
I. Baturin
1Institute of Natural Sciences and Mathematics,
Ural Federal University
, 620000 Ekaterinburg, Russia
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T. Nikitin;
T. Nikitin
1Institute of Natural Sciences and Mathematics,
Ural Federal University
, 620000 Ekaterinburg, Russia
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S. Vasilev
;
S. Vasilev
1Institute of Natural Sciences and Mathematics,
Ural Federal University
, 620000 Ekaterinburg, Russia
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F. Salehli;
F. Salehli
2Department of Physics Engineering,
Istanbul Technical University
, Maslak 34469, Istanbul, Turkey
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V. Ya. Shur
;
V. Ya. Shur
1Institute of Natural Sciences and Mathematics,
Ural Federal University
, 620000 Ekaterinburg, Russia
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A. L. Kholkin
A. L. Kholkin
a)
1Institute of Natural Sciences and Mathematics,
Ural Federal University
, 620000 Ekaterinburg, Russia
3Physics Department and CICECO–Materials Institute of Aveiro,
University of Aveiro
, 3810-193 Aveiro, Portugal
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A. Esin
1
I. Baturin
1
T. Nikitin
1
S. Vasilev
1
F. Salehli
2
V. Ya. Shur
1
A. L. Kholkin
1,3,a)
1Institute of Natural Sciences and Mathematics,
Ural Federal University
, 620000 Ekaterinburg, Russia
2Department of Physics Engineering,
Istanbul Technical University
, Maslak 34469, Istanbul, Turkey
3Physics Department and CICECO–Materials Institute of Aveiro,
University of Aveiro
, 3810-193 Aveiro, Portugal
a)
Author to whom correspondence should be addressed. Electronic mail: [email protected]
Appl. Phys. Lett. 109, 142902 (2016)
Article history
Received:
May 12 2016
Accepted:
August 25 2016
Citation
A. Esin, I. Baturin, T. Nikitin, S. Vasilev, F. Salehli, V. Ya. Shur, A. L. Kholkin; Pyroelectric effect and polarization instability in self-assembled diphenylalanine microtubes. Appl. Phys. Lett. 3 October 2016; 109 (14): 142902. https://doi.org/10.1063/1.4962652
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