Nanoscale investigations on β-phase orientation, piezoelectric response, and polarization direction of electrospun PVDF nanofibers

RSC Advances ◽  
2016 ◽  
Vol 6 (110) ◽  
pp. 109061-109066 ◽  
Author(s):  
Xia Liu ◽  
Sixing Xu ◽  
Xuanlin Kuang ◽  
Daxin Tan ◽  
Xiaohong Wang
Keyword(s):  
Piezoresponse Force Microscopy ◽  
Piezoelectric Response ◽  
Polarization Direction ◽  
Force Microscopy ◽  
Β Phase ◽  
Vector Mapping

The vector mapping of piezoelectricity was investigated on piezoelectric responses in different directions via advanced piezoresponse force microscopy.

Frequency-Dependent Electromechanical Response in Ferroelectric Materials Measured via Piezoresponse Force Microscopy

2003 ◽  
Vol 784 ◽  
Author(s):  
I. K. Bdikin ◽  
V. V. Shvartsman ◽  
S-H. Kim ◽  
J. Manuel Herrero ◽  
A. L. Kholkin
Keyword(s):  
Simple Model ◽  
Piezoresponse Force Microscopy ◽  
Ferroelectric Materials ◽  
Piezoelectric Response ◽  
Driving Frequency ◽  
Polarization Direction ◽  
Frequency Dependent ◽  
Force Microscopy ◽  
Out Of Plane ◽  
Frequency Phase

ABSTRACTLocal piezoelectric signal is measured via Piezoresponse Force Microscopy (PFM) in PbZr0.3Ti0.7O3 films and PbZr1/3Nb2/3O3-0.045PbTiO3 single crystals. It is observed that the amplitude of piezoelectric response is almost independent on frequency for vertical (out of plane) signal and strongly decreases with increasing frequency in the range 10–100 kHz for lateral (in-plane) response. Moreover, the in-plane piezoelectric contrast is reversed when the measurements are done at high enough frequency (phase shift exceeds 90°). As a result, the inplane polarization direction can be misinterpreted if the driving frequency exceeds certain level. For the explanation of observed effect a simple model is proposed that takes into account a possible slip between the conductive PFM tip and moving piezoelectric surface. The implications of the observed frequency-dependent contrast for the domain imaging in ferroelectric materials are discussed.

The Microstructure and Local Piezoelectric Response in Polymer Nanocomposites with Different Ferroelectric Crystalline Additions

2013 ◽  
Vol 1556 ◽  
Author(s):  
Dmitry A. Kiselev ◽  
Mikhail D. Malinkovich ◽  
Yuriy N. Parkhomenko ◽  
Alexandr V. Solnyshkin ◽  
Alexey A. Bogomolov ◽  
...  
Keyword(s):  
Electric Fields ◽  
Piezoelectric Properties ◽  
Piezoresponse Force Microscopy ◽  
Piezoelectric Response ◽  
Relaxation Dynamics ◽  
Force Microscopy ◽  
Nanostructured Polymer ◽  
Ferroelectric Domains ◽  
Resolution Imaging ◽  
Local Polarization

ABSTRACTIn this work, we report on local ferroelectric and piezoelectric properties of nanostructured polymer composites P(VDF-TrFE)+x(Ba,Pb)(Zr,Ti)O3 (x = 0 - 50 %). High-resolution imaging of ferroelectric domains, local polarization switching, and polarization relaxation dynamics were studied by piezoresponse force microscopy. In particular, we found that (Ba,Pb)(Zr,Ti)O3 inclusions usually show a strong unipolar piezoresponse signal, as compared to the polymer matrix. By scanning under high dc voltage the films can be polarized uniformly under both positive and negative electric fields. Stability of the polarized state is discussed.

scholarly journals Local Piezoelectric Properties of Doped Biomolecular Crystals

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4922
Author(s):  
Andrei Kholkin ◽  
Denis Alikin ◽  
Vladimir Shur ◽  
Shiri Dishon ◽  
David Ehre ◽  
...  
Keyword(s):  
Guest Molecule ◽  
Piezoelectric Properties ◽  
Dipole Moments ◽  
Mechanical Strain ◽  
Piezoresponse Force Microscopy ◽  
Piezoelectric Response ◽  
Force Microscopy ◽  
Highly Sensitive ◽  
Molecule Interactions ◽  
Co Doped

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, 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.

scholarly journals Electrical and Microstructural Changes of β-PVDF under Uniaxial Stress Studied by Scanning Force Microscopy

2006 ◽  
Vol 514-516 ◽  
pp. 915-919 ◽  
Author(s):  
Jivago Serrado-Nunes ◽  
Vitor Sencadas ◽  
Ai Ying Wu ◽  
Paula M. Vilarinho ◽  
Senentxu Lanceros-Méndez
Keyword(s):  
Polyvinylidene Fluoride ◽  
Strain Curve ◽  
Scanning Force Microscopy ◽  
Uniaxial Stress ◽  
Piezoelectric Response ◽  
Practical Applications ◽  
Force Microscopy ◽  
Β Phase ◽  
Scanning Force ◽  
Yielding Point

Chain reorientation may be induced in polyvinylidene fluoride (PVDF) in its β-phase by applying a deformation perpendicular to the pre-oriented polymeric chains. This reorientation begins right after the yielding point and seems to be completed when the stress-strain curve stabilizes. As the deformation process plays an important role in the processing and optimisation properties of the material for practical applications, different deformation stress was applied to the PVDF lamellas and their topographic change and piezoelectric response were studied by means of scanning force microscopy in a piezo-response mode. The experimental results confirm the previously observed chain reorientation that occurs right after the yielding point and that is completed when the yielding region is passed. This reorientation is accompanied by a stretching of the granular structures observed in the topographical images and variations in the domain response. The observed results help to explain the variations in the macroscopic response of the material.

scholarly journals Piezoelectricity in hafnia

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Sangita Dutta ◽  
Pratyush Buragohain ◽  
Sebastjan Glinsek ◽  
Claudia Richter ◽  
Hugo Aramberri ◽  
...  
Keyword(s):  
First Principles ◽  
Piezoelectric Effect ◽  
Piezoresponse Force Microscopy ◽  
Perovskite Oxides ◽  
Ferroelectric Material ◽  
Active Oxygen ◽  
Piezoelectric Response ◽  
First Principles Calculations ◽  
Force Microscopy ◽  
Epitaxial Strain

AbstractBecause of its compatibility with semiconductor-based technologies, hafnia (HfO2) is today’s most promising ferroelectric material for applications in electronics. Yet, knowledge on the ferroic and electromechanical response properties of this all-important compound is still lacking. Interestingly, HfO2 has recently been predicted to display a negative longitudinal piezoelectric effect, which sets it apart from classic ferroelectrics (e.g., perovskite oxides like PbTiO3) and is reminiscent of the behavior of some organic compounds. The present work corroborates this behavior, by first-principles calculations and an experimental investigation of HfO2 thin films using piezoresponse force microscopy. Further, the simulations show how the chemical coordination of the active oxygen atoms is responsible for the negative longitudinal piezoelectric effect. Building on these insights, it is predicted that, by controlling the environment of such active oxygens (e.g., by means of an epitaxial strain), it is possible to change the sign of the piezoelectric response of the material.

scholarly journals Piezoresponse in Ferroelectric Materials under Uniform Electric Field of Electrodes

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3707
Author(s):  
Artur Udalov ◽  
Denis Alikin ◽  
Andrei Kholkin
Keyword(s):  
Electric Field ◽  
Piezoelectric Materials ◽  
Piezoresponse Force Microscopy ◽  
Ferroelectric Materials ◽  
Piezoelectric Response ◽  
Uniform Electric Field ◽  
Anisotropic Solution ◽  
Force Microscopy ◽  
Quantitative Measurements ◽  
Wolfram Mathematica

The analytical solution for the displacements of an anisotropic piezoelectric material in the uniform electric field is presented for practical use in the “global excitation mode” of piezoresponse force microscopy. The solution is given in the Wolfram Mathematica interactive program code, allowing the derivation of the expression of the piezoresponse both in cases of the anisotropic and isotropic elastic properties. The piezoresponse’s angular dependencies are analyzed using model lithium niobate and barium titanate single crystals as examples. The validity of the isotropic approximation is verified in comparison to the fully anisotropic solution. The approach developed in the paper is important for the quantitative measurements of the piezoelectric response in nanomaterials as well as for the development of novel piezoelectric materials for the sensors/actuators applications.

scholarly journals Preparation, Stability and Local Piezoelectrical Properties of P(VDF-TrFE)/Graphene Oxide Composite Fibers

2019 ◽  
Vol 5 (3) ◽  
pp. 48
Author(s):  
Maxim Silibin ◽  
Dmitry Karpinsky ◽  
Vladimir Bystrov ◽  
Dzmitry Zhaludkevich ◽  
Marina Bazarova ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Piezoresponse Force Microscopy ◽  
Theoretical Models ◽  
Switching Behavior ◽  
Piezoelectric Response ◽  
Composite Fibers ◽  
Electromechanical Properties ◽  
Force Microscopy ◽  
Piezoelectric Polymer ◽  
Copolymer Poly

The unprecedented attributes such as biocompatibility and flexibility of macromolecular piezoelectric polymer has triggered an immense interested in scientific society for their potential exploitation in implantable electronic devices. In the present article, a theoretical and experimental investigation is done to explore the polarization behavior of composite fibers based on copolymer poly-trifluoroethylene P(VDF-TrFE) and graphene oxide (GO) with varying composition of the components is explored for its possible application in bioelectronic devices. Electromechanical properties of the PVDF/GO nanofibers were investigated using piezoresponse force microscopy (PFM) method. The switching behavior, charge states, and piezoelectric response of the fibers were found to depend on the concentration of GO up to 20%. Theoretical models of PVDF chains, interacting with Graphene/GO layers has been used to explore the evolution of piezoresponse in the composite fibers. In order to compute piezoelectric coefficients, the behavior of composite in electrical fields has been modeled using software HyperChem. The experimental results are qualitatively correlated with a computed theoretical model.

scholarly journals Nanoscale characterization of β-phase HxLi1−xNbO3 layers by piezoresponse force microscopy

2014 ◽  
Vol 116 (6) ◽  
pp. 066815 ◽  
Author(s):  
Michele Manzo ◽  
Denise Denning ◽  
Brian J. Rodriguez ◽  
Katia Gallo
Keyword(s):  
Piezoresponse Force Microscopy ◽  
Force Microscopy ◽  
Β Phase ◽  
Nanoscale Characterization
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