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Flexible Piezoelectric Touch Sensor by Alignment of Lead-Free Alkaline Niobate Microcubes in PDMS. / Deutz, Daniella B.; Mascarenhas, Neola T.; Schelen, J. Ben J.; de Leeuw, Dago M.; van der Zwaag, Sybrand; Groen, Pim.

In: Advanced Functional Materials, Vol. 27, No. 24, 2017.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Deutz, DB, Mascarenhas, NT, Schelen, JBJ, de Leeuw, DM, van der Zwaag, S & Groen, P 2017, 'Flexible Piezoelectric Touch Sensor by Alignment of Lead-Free Alkaline Niobate Microcubes in PDMS', Advanced Functional Materials, vol. 27, no. 24. https://doi.org/10.1002/adfm.201700728

APA

Deutz, D. B., Mascarenhas, N. T., Schelen, J. B. J., de Leeuw, D. M., van der Zwaag, S., & Groen, P. (2017). Flexible Piezoelectric Touch Sensor by Alignment of Lead-Free Alkaline Niobate Microcubes in PDMS. Advanced Functional Materials, 27(24). https://doi.org/10.1002/adfm.201700728

Vancouver

Author

Deutz, Daniella B. ; Mascarenhas, Neola T. ; Schelen, J. Ben J. ; de Leeuw, Dago M. ; van der Zwaag, Sybrand ; Groen, Pim. / Flexible Piezoelectric Touch Sensor by Alignment of Lead-Free Alkaline Niobate Microcubes in PDMS. In: Advanced Functional Materials. 2017 ; Vol. 27, No. 24.

BibTeX

@article{0ffdc4deef2841a2b0076887229cc475,
title = "Flexible Piezoelectric Touch Sensor by Alignment of Lead-Free Alkaline Niobate Microcubes in PDMS",
abstract = "A highly sensitive, lead-free, and flexible piezoelectric touch sensor is reported based on composite films of alkaline niobate K0.485Na0.485Li0.03NbO3 (KNLN) powders aligned in a polydimethylsiloxane (PDMS) matrix. KNLN powder is fabricated by solid-state sintering and consists of microcubes. The particles are dispersed in uncured PDMS and oriented by application of an oscillating dielectrophoretic alignment field. The dielectric constant of the composite film is almost independent of the microstructure, while upon alignment the piezoelectric charge coefficient increases more than tenfold up to 17 pC N-1. A quantitative analysis shows that the origin is a reduction of the interparticle distance to under 1.0 μm in the aligned bicontinuous KNLN chains. The temperature stable piezoelectric voltage coefficient exhibits a maximum value of 220 mV m N-1, at a volume fraction of only 10%. This state-of-the-art value outperforms bulk piezoelectric ceramics and composites with randomly dispersed particles, and is comparable to the values reported for the piezoelectric polymers polyvinylidenefluoride and its random copolymer with trifluoroethylene. Optimized composite films are incorporated in flexible piezoelectric touch sensors. The high sensitivity is analyzed and discussed. As the fabrication technology is straightforward and easy to implement, applications are foreseen in flexible electronics such as wireless sensor networks and biodiagnostics.",
keywords = "Alkaline niobates, Energy harvesting, Functional composites, Piezoelectric materials, Touch sensors",
author = "Deutz, {Daniella B.} and Mascarenhas, {Neola T.} and Schelen, {J. Ben J.} and {de Leeuw}, {Dago M.} and {van der Zwaag}, Sybrand and Pim Groen",
year = "2017",
doi = "10.1002/adfm.201700728",
language = "English",
volume = "27",
journal = "Advanced Functional Materials",
issn = "1616-301X",
publisher = "Wiley-VCH",
number = "24",

}

RIS

TY - JOUR

T1 - Flexible Piezoelectric Touch Sensor by Alignment of Lead-Free Alkaline Niobate Microcubes in PDMS

AU - Deutz, Daniella B.

AU - Mascarenhas, Neola T.

AU - Schelen, J. Ben J.

AU - de Leeuw, Dago M.

AU - van der Zwaag, Sybrand

AU - Groen, Pim

PY - 2017

Y1 - 2017

N2 - A highly sensitive, lead-free, and flexible piezoelectric touch sensor is reported based on composite films of alkaline niobate K0.485Na0.485Li0.03NbO3 (KNLN) powders aligned in a polydimethylsiloxane (PDMS) matrix. KNLN powder is fabricated by solid-state sintering and consists of microcubes. The particles are dispersed in uncured PDMS and oriented by application of an oscillating dielectrophoretic alignment field. The dielectric constant of the composite film is almost independent of the microstructure, while upon alignment the piezoelectric charge coefficient increases more than tenfold up to 17 pC N-1. A quantitative analysis shows that the origin is a reduction of the interparticle distance to under 1.0 μm in the aligned bicontinuous KNLN chains. The temperature stable piezoelectric voltage coefficient exhibits a maximum value of 220 mV m N-1, at a volume fraction of only 10%. This state-of-the-art value outperforms bulk piezoelectric ceramics and composites with randomly dispersed particles, and is comparable to the values reported for the piezoelectric polymers polyvinylidenefluoride and its random copolymer with trifluoroethylene. Optimized composite films are incorporated in flexible piezoelectric touch sensors. The high sensitivity is analyzed and discussed. As the fabrication technology is straightforward and easy to implement, applications are foreseen in flexible electronics such as wireless sensor networks and biodiagnostics.

AB - A highly sensitive, lead-free, and flexible piezoelectric touch sensor is reported based on composite films of alkaline niobate K0.485Na0.485Li0.03NbO3 (KNLN) powders aligned in a polydimethylsiloxane (PDMS) matrix. KNLN powder is fabricated by solid-state sintering and consists of microcubes. The particles are dispersed in uncured PDMS and oriented by application of an oscillating dielectrophoretic alignment field. The dielectric constant of the composite film is almost independent of the microstructure, while upon alignment the piezoelectric charge coefficient increases more than tenfold up to 17 pC N-1. A quantitative analysis shows that the origin is a reduction of the interparticle distance to under 1.0 μm in the aligned bicontinuous KNLN chains. The temperature stable piezoelectric voltage coefficient exhibits a maximum value of 220 mV m N-1, at a volume fraction of only 10%. This state-of-the-art value outperforms bulk piezoelectric ceramics and composites with randomly dispersed particles, and is comparable to the values reported for the piezoelectric polymers polyvinylidenefluoride and its random copolymer with trifluoroethylene. Optimized composite films are incorporated in flexible piezoelectric touch sensors. The high sensitivity is analyzed and discussed. As the fabrication technology is straightforward and easy to implement, applications are foreseen in flexible electronics such as wireless sensor networks and biodiagnostics.

KW - Alkaline niobates

KW - Energy harvesting

KW - Functional composites

KW - Piezoelectric materials

KW - Touch sensors

UR - http://www.scopus.com/inward/record.url?scp=85018780472&partnerID=8YFLogxK

UR - http://resolver.tudelft.nl/uuid:0ffdc4de-ef28-41a2-b007-6887229cc475

U2 - 10.1002/adfm.201700728

DO - 10.1002/adfm.201700728

M3 - Article

AN - SCOPUS:85018780472

VL - 27

JO - Advanced Functional Materials

JF - Advanced Functional Materials

SN - 1616-301X

IS - 24

ER -

ID: 19760938