Experimental and theoretical studies of serpentine microstructures bonded to prestrained elastomers for stretchable electronics

Yihui Zhang, Shuodao Wang, Xuetong Li, Jonathan A. Fan, Sheng Xu, Young Min Song, Ki Joong Choi, Woon Hong Yeo, Woosik Lee, Sharaf Nafees Nazaar, Bingwei Lu, Lan Yin, Keh Chih Hwang, John A. Rogers*, Yonggang Huang

*Corresponding author for this work

Research output: Contribution to journalArticle

121 Citations (Scopus)

Abstract

Stretchable electronic devices that exploit inorganic materials are attractive due to their combination of high performance with mechanical deformability, particularly for applications in biomedical devices that require intimate integration with human body. Several mechanics and materials schemes have been devised for this type of technology, many of which exploit deformable interconnects. When such interconnects are fully bonded to the substrate and/or encapsulated in a solid material, useful but modest levels of deformation (<30-40%) are possible, with reversible and repeatable mechanics. Here, the use of prestrain in the substrate is introduced, together with interconnects in narrow, serpentine shapes, to yield significantly enhanced (more than two times) stretchability, to more than 100%. Fracture and cyclic fatigue testing on structures formed with and without prestrain quantitatively demonstrate the possible enhancements. Finite element analyses (FEA) illustrates the effects of various material and geometric parameters. A drastic decrease in the elastic stretchability is observed with increasing metal thickness, due to changes in the buckling mode, that is, from local wrinkling at small thicknesses to absence of such wrinkling at large thicknesses, as revealed by experiment. An analytic model quantitatively predicts the wavelength of this wrinkling, and explains the thickness dependence of the buckling behaviors.

Original languageEnglish (US)
Pages (from-to)2028-2037
Number of pages10
JournalAdvanced Functional Materials
Volume24
Issue number14
DOIs
StatePublished - Apr 9 2014

Fingerprint

Elastomers
elastomers
wrinkling
Electronic equipment
microstructure
Microstructure
buckling
electronics
Buckling
Mechanics
inorganic materials
Fatigue testing
human body
Substrates
Formability
Metals
Wavelength
augmentation
wavelengths
metals

Keywords

  • buckling analyses
  • flexible electronics
  • modeling
  • serpentine interconnect
  • stretchable electronics

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Zhang, Yihui ; Wang, Shuodao ; Li, Xuetong ; Fan, Jonathan A. ; Xu, Sheng ; Song, Young Min ; Choi, Ki Joong ; Yeo, Woon Hong ; Lee, Woosik ; Nazaar, Sharaf Nafees ; Lu, Bingwei ; Yin, Lan ; Hwang, Keh Chih ; Rogers, John A. ; Huang, Yonggang. / Experimental and theoretical studies of serpentine microstructures bonded to prestrained elastomers for stretchable electronics. In: Advanced Functional Materials. 2014 ; Vol. 24, No. 14. pp. 2028-2037.
@article{5c61b000d70d41b6aaf202fcd50dc2ff,
title = "Experimental and theoretical studies of serpentine microstructures bonded to prestrained elastomers for stretchable electronics",
abstract = "Stretchable electronic devices that exploit inorganic materials are attractive due to their combination of high performance with mechanical deformability, particularly for applications in biomedical devices that require intimate integration with human body. Several mechanics and materials schemes have been devised for this type of technology, many of which exploit deformable interconnects. When such interconnects are fully bonded to the substrate and/or encapsulated in a solid material, useful but modest levels of deformation (<30-40{\%}) are possible, with reversible and repeatable mechanics. Here, the use of prestrain in the substrate is introduced, together with interconnects in narrow, serpentine shapes, to yield significantly enhanced (more than two times) stretchability, to more than 100{\%}. Fracture and cyclic fatigue testing on structures formed with and without prestrain quantitatively demonstrate the possible enhancements. Finite element analyses (FEA) illustrates the effects of various material and geometric parameters. A drastic decrease in the elastic stretchability is observed with increasing metal thickness, due to changes in the buckling mode, that is, from local wrinkling at small thicknesses to absence of such wrinkling at large thicknesses, as revealed by experiment. An analytic model quantitatively predicts the wavelength of this wrinkling, and explains the thickness dependence of the buckling behaviors.",
keywords = "buckling analyses, flexible electronics, modeling, serpentine interconnect, stretchable electronics",
author = "Yihui Zhang and Shuodao Wang and Xuetong Li and Fan, {Jonathan A.} and Sheng Xu and Song, {Young Min} and Choi, {Ki Joong} and Yeo, {Woon Hong} and Woosik Lee and Nazaar, {Sharaf Nafees} and Bingwei Lu and Lan Yin and Hwang, {Keh Chih} and Rogers, {John A.} and Yonggang Huang",
year = "2014",
month = "4",
day = "9",
doi = "10.1002/adfm.201302957",
language = "English (US)",
volume = "24",
pages = "2028--2037",
journal = "Advanced Functional Materials",
issn = "1616-301X",
publisher = "Wiley-VCH Verlag",
number = "14",

}

Zhang, Y, Wang, S, Li, X, Fan, JA, Xu, S, Song, YM, Choi, KJ, Yeo, WH, Lee, W, Nazaar, SN, Lu, B, Yin, L, Hwang, KC, Rogers, JA & Huang, Y 2014, 'Experimental and theoretical studies of serpentine microstructures bonded to prestrained elastomers for stretchable electronics', Advanced Functional Materials, vol. 24, no. 14, pp. 2028-2037. https://doi.org/10.1002/adfm.201302957

Experimental and theoretical studies of serpentine microstructures bonded to prestrained elastomers for stretchable electronics. / Zhang, Yihui; Wang, Shuodao; Li, Xuetong; Fan, Jonathan A.; Xu, Sheng; Song, Young Min; Choi, Ki Joong; Yeo, Woon Hong; Lee, Woosik; Nazaar, Sharaf Nafees; Lu, Bingwei; Yin, Lan; Hwang, Keh Chih; Rogers, John A.; Huang, Yonggang.

In: Advanced Functional Materials, Vol. 24, No. 14, 09.04.2014, p. 2028-2037.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Experimental and theoretical studies of serpentine microstructures bonded to prestrained elastomers for stretchable electronics

AU - Zhang, Yihui

AU - Wang, Shuodao

AU - Li, Xuetong

AU - Fan, Jonathan A.

AU - Xu, Sheng

AU - Song, Young Min

AU - Choi, Ki Joong

AU - Yeo, Woon Hong

AU - Lee, Woosik

AU - Nazaar, Sharaf Nafees

AU - Lu, Bingwei

AU - Yin, Lan

AU - Hwang, Keh Chih

AU - Rogers, John A.

AU - Huang, Yonggang

PY - 2014/4/9

Y1 - 2014/4/9

N2 - Stretchable electronic devices that exploit inorganic materials are attractive due to their combination of high performance with mechanical deformability, particularly for applications in biomedical devices that require intimate integration with human body. Several mechanics and materials schemes have been devised for this type of technology, many of which exploit deformable interconnects. When such interconnects are fully bonded to the substrate and/or encapsulated in a solid material, useful but modest levels of deformation (<30-40%) are possible, with reversible and repeatable mechanics. Here, the use of prestrain in the substrate is introduced, together with interconnects in narrow, serpentine shapes, to yield significantly enhanced (more than two times) stretchability, to more than 100%. Fracture and cyclic fatigue testing on structures formed with and without prestrain quantitatively demonstrate the possible enhancements. Finite element analyses (FEA) illustrates the effects of various material and geometric parameters. A drastic decrease in the elastic stretchability is observed with increasing metal thickness, due to changes in the buckling mode, that is, from local wrinkling at small thicknesses to absence of such wrinkling at large thicknesses, as revealed by experiment. An analytic model quantitatively predicts the wavelength of this wrinkling, and explains the thickness dependence of the buckling behaviors.

AB - Stretchable electronic devices that exploit inorganic materials are attractive due to their combination of high performance with mechanical deformability, particularly for applications in biomedical devices that require intimate integration with human body. Several mechanics and materials schemes have been devised for this type of technology, many of which exploit deformable interconnects. When such interconnects are fully bonded to the substrate and/or encapsulated in a solid material, useful but modest levels of deformation (<30-40%) are possible, with reversible and repeatable mechanics. Here, the use of prestrain in the substrate is introduced, together with interconnects in narrow, serpentine shapes, to yield significantly enhanced (more than two times) stretchability, to more than 100%. Fracture and cyclic fatigue testing on structures formed with and without prestrain quantitatively demonstrate the possible enhancements. Finite element analyses (FEA) illustrates the effects of various material and geometric parameters. A drastic decrease in the elastic stretchability is observed with increasing metal thickness, due to changes in the buckling mode, that is, from local wrinkling at small thicknesses to absence of such wrinkling at large thicknesses, as revealed by experiment. An analytic model quantitatively predicts the wavelength of this wrinkling, and explains the thickness dependence of the buckling behaviors.

KW - buckling analyses

KW - flexible electronics

KW - modeling

KW - serpentine interconnect

KW - stretchable electronics

UR - http://www.scopus.com/inward/record.url?scp=84898011382&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84898011382&partnerID=8YFLogxK

U2 - 10.1002/adfm.201302957

DO - 10.1002/adfm.201302957

M3 - Article

VL - 24

SP - 2028

EP - 2037

JO - Advanced Functional Materials

JF - Advanced Functional Materials

SN - 1616-301X

IS - 14

ER -