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Approaching Piezoelectric Response of Pb-Piezoelectrics in Hydrothermally Synthesized Bi-0.5(Na1-xKx)(0.5)TiO3 Nanotubes

Ghasemian, Mohammad Bagher; Rawal, Aditya; Liu, Yun; Wang, Danyang

Description

A large piezoelectric coefficient of 76 pm/V along the diameter direction, approaching that of lead-based piezoelectrics, is observed in hydrothermally synthesized Pb-free Bi0.5(Na0.8K0.2)0.5TiO3 nanotubes. The 30–50 nm diameter nanotubes are formed through a scrolling and wrapping mechanism without the need of a surfactant or template. A molar ratio of KOH/NaOH = 0.5 for the mineralizers yields the Na/K ratio of ∼0.8:0.2, corresponding to an orthorhombic–tetragonal (O–T) phase boundary...[Show more]

dc.contributor.authorGhasemian, Mohammad Bagher
dc.contributor.authorRawal, Aditya
dc.contributor.authorLiu, Yun
dc.contributor.authorWang, Danyang
dc.date.accessioned2019-09-24T06:18:17Z
dc.identifier.issn1944-8244
dc.identifier.urihttp://hdl.handle.net/1885/170693
dc.description.abstractA large piezoelectric coefficient of 76 pm/V along the diameter direction, approaching that of lead-based piezoelectrics, is observed in hydrothermally synthesized Pb-free Bi0.5(Na0.8K0.2)0.5TiO3 nanotubes. The 30–50 nm diameter nanotubes are formed through a scrolling and wrapping mechanism without the need of a surfactant or template. A molar ratio of KOH/NaOH = 0.5 for the mineralizers yields the Na/K ratio of ∼0.8:0.2, corresponding to an orthorhombic–tetragonal (O–T) phase boundary composition. X-ray diffraction patterns along with transmission electron microscopy analysis ascertain the coexistence of orthorhombic and tetragonal phases with (110) and (001) orientations along the nanotube length direction, respectively. 23Na NMR spectroscopy confirms the higher degree of disorder in Bi0.5(Na1–xKx)0.5TiO3 nanotubes with O–T phase coexistence. These findings present a significant advance toward the application of Pb-free piezoelectric materials.
dc.description.sponsorshipThis work was partially supported by the Australian Research Council Discovery Project (grant no. DP170103514). A.R. acknowledges the Mark Wainwright Analytical Centre at UNSW for access to the solid-state NMR spectrometers funded through ARC LIEF (grant no. LE0989541).
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherAmerican Chemical Society
dc.rights© 2018 American Chemical Society
dc.sourceACS Applied Materials and Interfaces
dc.titleApproaching Piezoelectric Response of Pb-Piezoelectrics in Hydrothermally Synthesized Bi-0.5(Na1-xKx)(0.5)TiO3 Nanotubes
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume10
dc.date.issued2018
local.identifier.absfor030606 - Structural Chemistry and Spectroscopy
local.identifier.ariespublicationu4485658xPUB1898
local.publisher.urlhttps://pubs.acs.org/
local.type.statusPublished Version
local.contributor.affiliationGhasemian, Mohammad Bagher, University of New South Wales
local.contributor.affiliationRawal, Aditya, University of New South Wales
local.contributor.affiliationLiu, Yun, College of Science, ANU
local.contributor.affiliationWang, Danyang, University of New South Wales
local.description.embargo2037-12-31
dc.relationhttp://purl.org/au-research/grants/arc/DP170103514
dc.relationhttp://purl.org/au-research/grants/arc/LE0989541
local.bibliographicCitation.issue24
local.bibliographicCitation.startpage20816
local.bibliographicCitation.lastpage20825
local.identifier.doi10.1021/acsami.8b06312
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2019-03-12T07:31:37Z
local.identifier.scopusID2-s2.0-85048045484
local.identifier.thomsonID000436211500067
CollectionsANU Research Publications

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