Approaching Piezoelectric Response of Pb-Piezoelectrics in Hydrothermally Synthesized Bi0.5(Na1- xKx)0.5TiO3Nanotubes

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

doi:10.1021/acsami.8b06312

Approaching Piezoelectric Response of Pb-Piezoelectrics in Hydrothermally Synthesized Bi_0.5(Na_{1- x}K_x)_0.5TiO₃Nanotubes

Mohammad Bagher Ghasemian, Aditya Rawal, Yun Liu, Danyang Wang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

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 Bi_0.5(Na_0.8K_0.2)_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 Bi_0.5(Na_1-xK_x)_0.5TiO₃ nanotubes with O-T phase coexistence. These findings present a significant advance toward the application of Pb-free piezoelectric materials.

Original language	English
Pages (from-to)	20816-20825
Number of pages	10
Journal	ACS applied materials & interfaces
Volume	10
Issue number	24
DOIs	https://doi.org/10.1021/acsami.8b06312
Publication status	Published - 20 Jun 2018

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title = "Approaching Piezoelectric Response of Pb-Piezoelectrics in Hydrothermally Synthesized Bi0.5(Na1- xKx)0.5TiO3Nanotubes",

abstract = "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 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.",

keywords = "Bi(NaK)TiO, lead-free, nanotube, one-dimensional, piezoelectric",

author = "Ghasemian, {Mohammad Bagher} and Aditya Rawal and Yun Liu and Danyang Wang",

note = "Publisher Copyright: Copyright {\textcopyright} 2018 American Chemical Society.",

year = "2018",

month = jun,

day = "20",

doi = "10.1021/acsami.8b06312",

language = "English",

volume = "10",

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AU - Ghasemian, Mohammad Bagher

AU - Rawal, Aditya

AU - Liu, Yun

AU - Wang, Danyang

PY - 2018/6/20

Y1 - 2018/6/20

N2 - 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 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.

AB - 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 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.

KW - Bi(NaK)TiO

KW - lead-free

KW - nanotube

KW - one-dimensional

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U2 - 10.1021/acsami.8b06312

DO - 10.1021/acsami.8b06312

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SN - 1944-8244

VL - 10

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EP - 20825

JO - ACS applied materials & interfaces

JF - ACS applied materials & interfaces

IS - 24

ER -

Approaching Piezoelectric Response of Pb-Piezoelectrics in Hydrothermally Synthesized Bi_0.5(Na_{1- x}K_x)_0.5TiO₃Nanotubes

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