Evidence of ferroelectricity and phase transition in pressed diphenylalanine peptide nanotubes

被引：57

作者：

Bdikin, Igor ^{[2
,3
]}

Bystrov, Vladimir ^{[1
,4
]}

Kopyl, Svitlana ^{[3
]}

Lopes, Rui P. G. ^{[1
,2
]}

Delgadillo, Ivonne ^{[5
,6
]}

Gracio, Jose ^{[3
]}

Mishina, Elena ^{[7
]}

Sigov, Alexander ^{[7
]}

Kholkin, Andrei L. ^{[1
,2
]}

机构：

[1] Univ Aveiro, Dept Ceram & Glass Engn, P-3810193 Aveiro, Portugal

[2] Univ Aveiro, CICECO, P-3810193 Aveiro, Portugal

[3] Univ Aveiro, Ctr Mech Technol & Automat TEMA, P-3810193 Aveiro, Portugal

[4] Inst Math Problems Biol RAS, Pushchino 142290, Russia

[5] Univ Aveiro, Dept Chem, P-3810193 Aveiro, Portugal

[6] Univ Aveiro, QOPNAA, P-3810193 Aveiro, Portugal

[7] Moscow State Inst Radioengn Elect & Automat, Moscow 119454, Russia

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 04期

关键词：

PIEZOELECTRIC PROPERTIES; ION; WATER;

D O I：

10.1063/1.3676417

中图分类号：

O59 [应用物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Self-assembled peptide nanotubes (PNT) are unique nanoscale objects having a great potential for a multitude of applications. Strong piezoactivity and polar properties in aromatic dipeptides were recently observed in stand-alone nanotubes using piezoresponse force microscopy and 2(nd) harmonic generation. In this work, we report macroscopic dielectric and polarization vs. field measurements on pressed PNTs before and after annealing at 150 degrees C. The results corroborate nanoscale study and present a clear evidence of ferroelectric-like behaviour and phase transition in this technologically important material. The dielectric constant of PNT pellets obeys apparent Curie-Weiss (CW) law with the CW constant C approximate to 230 degrees C and transition temperature at T approximate to 142 degrees C. (C) 2012 American Institute of Physics. [doi: 10.1063/1.3676417]

引用

页数：4

共 29 条

[1]

Thermal and chemical stability of diphenylalanine peptide nanotubes: Implications for nanotechnological applications [J].