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.

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 Micro-Area Ferroelectric, Piezoelectric and Conductive Properties of Single BiFeO3 Nanowire by Scanning Probe Microscopy

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 190 ◽  
Author(s):  
Shenglan Wu ◽  
Jing Zhang ◽  
Xiaoyan Liu ◽  
Siyi Lv ◽  
Rongli Gao ◽  
...  
Keyword(s):  
Scanning Probe Microscopy ◽  
Bismuth Ferrite ◽  
Piezoresponse Force Microscopy ◽  
Scanning Probe ◽  
Switching Behavior ◽  
X Ray Diffraction ◽  
Probe Microscopy ◽  
Force Microscopy ◽  
Atomic Force ◽  
Conductive Properties

Ferroelectric nanowires have attracted great attention due to their excellent physical properties. We report the domain structure, ferroelectric, piezoelectric, and conductive properties of bismuth ferrite (BFO, short for BiFeO3) nanowires characterized by scanning probe microscopy (SPM). The X-ray diffraction (XRD) pattern presents single phase BFO without other obvious impurities. The piezoresponse force microscopy (PFM) results indicate that the nanowires possess a multidomain configuration, and the maximum piezoelectric coefficient (d33) of single BFO nanowire is 22.21 pm/V. Poling experiments and local switching spectroscopy piezoresponse force microscopy (SS-PFM) demonstrate that there is sufficient polarization switching behavior and obvious piezoelectric properties in BFO nanowires. The conducting atomic force microscopy (C-AFM) results show that the current is just hundreds of pA at 8 V. These lay the foundation for the application of BFO nanowires in nanodevices.

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 Piezoelectric Response in Hybrid Micropillar Arrays of Poly(Vinylidene Fluoride) and Reduced Graphene Oxide

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1065 ◽  
Author(s):  
Igor O. Pariy ◽  
Anna A. Ivanova ◽  
Vladimir V. Shvartsman ◽  
Doru C. Lupascu ◽  
Gleb B. Sukhorukov ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Low Temperature ◽  
Reduced Graphene Oxide ◽  
Vinylidene Fluoride ◽  
Piezoelectric Response ◽  
Response Force ◽  
Force Microscopy ◽  
Reduced Graphene ◽  
Poly Vinylidene Fluoride ◽  
Micropillar Arrays

This study was dedicated to the investigation of poly(vinylidene fluoride) (PVDF) micropillar arrays obtained by soft lithography followed by phase inversion at a low temperature. Reduced graphene oxide (rGO) was incorporated into the PVDF as a nucleating filler. The piezoelectric properties of the PVDF-rGO composite micropillars were explored via piezo-response force microscopy (PFM). Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) showed that α, β, and γ phases co-existed in all studied samples, with a predominance of the γ phase. The piezoresponse force microscopy (PFM) data provided the local piezoelectric response of the PVDF micropillars, which exhibited a temperature-induced downward dipole orientation in the pristine PVDF micropillars. The addition of rGO into the PVDF matrix resulted in a change in the preferred polarization direction, and the piezo-response phase angle changed from −120° to 20°–40°. The pristine PVDF and PVDF loaded with 0.1 wt % of rGO after low-temperature quenching were found to possess a piezoelectric response of 86 and 87 pm/V respectively, which are significantly higher than the |d33eff| in the case of imprinted PVDF 64 pm/V. Thus, the addition of rGO significantly affected the domain orientation (polarization) while quenching increased the piezoelectric response.

Sign in / Sign up

Export Citation Format

Share Document