Surface Morphology Induced Localized Electric Field and Piezoresponse Enhancement in Nanostructured Thin Films

Sharath Sriram; Madhu Bhaskaran; Rajeev Ahluwalia; Thach G. Nguyen; Nathaniel Ng; David J. Srolovitz; Kourosh Kalantar-zadeh; Arnan Mitchell

doi:10.1021/nn103561u

Author(s)

Sharath Sriram
Madhu Bhaskaran
Rajeev Ahluwalia
Thach G. Nguyen
Nathaniel Ng
Kourosh Kalantar-zadeh
Arnan Mitchell

Detail(s)

Original language	English
Pages (from-to)	1067-1072
Journal / Publication	ACS Nano
Volume	5
Issue number	2
Online published	27 Jan 2011
Publication status	Published - 22 Feb 2011
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1021/nn103561u Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-79951860189&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(65a0826c-a255-48f3-84df-55871299061d).html

Abstract

Nanostructured piezoelectric and ferroelectric thin films are being increasingly used in sensing and actuating microdevices. In this work, we report the experimental discovery of localized electric field enhancement in nanocolumnar piezoelectric thin films and its significant impact on piezoresponse. The magnitude of electric field enhancement is associated with nonflat surface morphologies and is in agreement with theoretical and finite element models. The influence of this surface morphology induced enhancement on piezoresponse is demonstrated using phase field simulations, which also illustrates surface morphology induced strain enhancement. The observed enhancement can be effectively harnessed to improve the sensitivity of related piezoelectric thin film applications.

Research Area(s)

electric field enhancement, enhancement factor, phase field simulations, piezoelectric thin films, piezoresponse, surface roughness

Citation Format(s)

[ RIS ] [ BibTeX ]

Surface Morphology Induced Localized Electric Field and Piezoresponse Enhancement in Nanostructured Thin Films. / Sriram, Sharath; Bhaskaran, Madhu; Ahluwalia, Rajeev et al.

In: ACS Nano, Vol. 5, No. 2, 22.02.2011, p. 1067-1072.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

Sriram, S, Bhaskaran, M, Ahluwalia, R, Nguyen, TG, Ng, N, Srolovitz, DJ, Kalantar-zadeh, K & Mitchell, A 2011, 'Surface Morphology Induced Localized Electric Field and Piezoresponse Enhancement in Nanostructured Thin Films', ACS Nano, vol. 5, no. 2, pp. 1067-1072. https://doi.org/10.1021/nn103561u

Sriram, S., Bhaskaran, M., Ahluwalia, R., Nguyen, T. G., Ng, N., Srolovitz, D. J., Kalantar-zadeh, K., & Mitchell, A. (2011). Surface Morphology Induced Localized Electric Field and Piezoresponse Enhancement in Nanostructured Thin Films. ACS Nano, 5(2), 1067-1072. https://doi.org/10.1021/nn103561u

Sriram S, Bhaskaran M, Ahluwalia R, Nguyen TG, Ng N, Srolovitz DJ et al. Surface Morphology Induced Localized Electric Field and Piezoresponse Enhancement in Nanostructured Thin Films. ACS Nano. 2011 Feb 22;5(2):1067-1072. Epub 2011 Jan 27. doi: 10.1021/nn103561u

Sriram, Sharath ; Bhaskaran, Madhu ; Ahluwalia, Rajeev et al. / Surface Morphology Induced Localized Electric Field and Piezoresponse Enhancement in Nanostructured Thin Films. In: ACS Nano. 2011 ; Vol. 5, No. 2. pp. 1067-1072.