Soft core/shell packages for stretchable electronics

Chi Hwan Lee, Yinji Ma, Kyung In Jang, Anthony Banks, Taisong Pan, Xue Feng, Jae Soon Kim, Daeshik Kang, Milan S. Raj, Bryan L. McGrane, Briana Morey, Xianyan Wang, Roozbeh Ghaffari, Yonggang Huang*, John A. Rogers

*Corresponding author for this work

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

This paper presents materials and core/shell architectures that provide optimized mechanical properties in packages for stretchable electronic systems. Detailed experimental and theoretical studies quantitatively connect the geometries and elastic properties of the constituent materials to the overall mechanical responses of the integrated systems, with a focus on interfacial stresses, effective modulus, and maximum extent of elongation. Specific results include core/shell designs that lead to peak values of the shear and normal stresses on the skin that remain less than 10 kPa even for applied strains of up to 20%, thereby inducing minimal somatosensory perception of the device on the human skin. Additional, strain-limiting mesh structures embedded in the shell improve mechanical robustness by protecting the active components from strains that would otherwise exceed the fracture point. Demonstrations in precommercial stretchable electronic systems illustrate the utility of these concepts. Human skin-like core/shell material structure is presented for use in wearable, stretchable electronic systems. Here, an ultralow-modulus elastomer (core) with a thin enclosure (shell) serves to minimize interface stresses and mechanical constraints on natural motions, with ability to strain-isolate the electronics. Demonstration examples exploit emerging commercial classes of stretchable electronic system to wirelessly monitor a subject's motion and body temperature during exercise.

Original languageEnglish (US)
Pages (from-to)3698-3704
Number of pages7
JournalAdvanced Functional Materials
Volume25
Issue number24
DOIs
StatePublished - Jun 1 2015

Fingerprint

Electronic equipment
Skin
electronics
Demonstrations
Elastomers
body temperature
Enclosures
physical exercise
Elongation
elastomers
enclosure
shear stress
elongation
mesh
emerging
Mechanical properties
elastic properties
Geometry
mechanical properties
geometry

Keywords

  • core/shell package
  • epidermal systems
  • stretchable electronics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Condensed Matter Physics
  • Electrochemistry

Cite this

Lee, C. H., Ma, Y., Jang, K. I., Banks, A., Pan, T., Feng, X., ... Rogers, J. A. (2015). Soft core/shell packages for stretchable electronics. Advanced Functional Materials, 25(24), 3698-3704. https://doi.org/10.1002/adfm.201501086
Lee, Chi Hwan ; Ma, Yinji ; Jang, Kyung In ; Banks, Anthony ; Pan, Taisong ; Feng, Xue ; Kim, Jae Soon ; Kang, Daeshik ; Raj, Milan S. ; McGrane, Bryan L. ; Morey, Briana ; Wang, Xianyan ; Ghaffari, Roozbeh ; Huang, Yonggang ; Rogers, John A. / Soft core/shell packages for stretchable electronics. In: Advanced Functional Materials. 2015 ; Vol. 25, No. 24. pp. 3698-3704.
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Lee, CH, Ma, Y, Jang, KI, Banks, A, Pan, T, Feng, X, Kim, JS, Kang, D, Raj, MS, McGrane, BL, Morey, B, Wang, X, Ghaffari, R, Huang, Y & Rogers, JA 2015, 'Soft core/shell packages for stretchable electronics', Advanced Functional Materials, vol. 25, no. 24, pp. 3698-3704. https://doi.org/10.1002/adfm.201501086

Soft core/shell packages for stretchable electronics. / Lee, Chi Hwan; Ma, Yinji; Jang, Kyung In; Banks, Anthony; Pan, Taisong; Feng, Xue; Kim, Jae Soon; Kang, Daeshik; Raj, Milan S.; McGrane, Bryan L.; Morey, Briana; Wang, Xianyan; Ghaffari, Roozbeh; Huang, Yonggang; Rogers, John A.

In: Advanced Functional Materials, Vol. 25, No. 24, 01.06.2015, p. 3698-3704.

Research output: Contribution to journalArticle

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T1 - Soft core/shell packages for stretchable electronics

AU - Lee, Chi Hwan

AU - Ma, Yinji

AU - Jang, Kyung In

AU - Banks, Anthony

AU - Pan, Taisong

AU - Feng, Xue

AU - Kim, Jae Soon

AU - Kang, Daeshik

AU - Raj, Milan S.

AU - McGrane, Bryan L.

AU - Morey, Briana

AU - Wang, Xianyan

AU - Ghaffari, Roozbeh

AU - Huang, Yonggang

AU - Rogers, John A.

PY - 2015/6/1

Y1 - 2015/6/1

N2 - This paper presents materials and core/shell architectures that provide optimized mechanical properties in packages for stretchable electronic systems. Detailed experimental and theoretical studies quantitatively connect the geometries and elastic properties of the constituent materials to the overall mechanical responses of the integrated systems, with a focus on interfacial stresses, effective modulus, and maximum extent of elongation. Specific results include core/shell designs that lead to peak values of the shear and normal stresses on the skin that remain less than 10 kPa even for applied strains of up to 20%, thereby inducing minimal somatosensory perception of the device on the human skin. Additional, strain-limiting mesh structures embedded in the shell improve mechanical robustness by protecting the active components from strains that would otherwise exceed the fracture point. Demonstrations in precommercial stretchable electronic systems illustrate the utility of these concepts. Human skin-like core/shell material structure is presented for use in wearable, stretchable electronic systems. Here, an ultralow-modulus elastomer (core) with a thin enclosure (shell) serves to minimize interface stresses and mechanical constraints on natural motions, with ability to strain-isolate the electronics. Demonstration examples exploit emerging commercial classes of stretchable electronic system to wirelessly monitor a subject's motion and body temperature during exercise.

AB - This paper presents materials and core/shell architectures that provide optimized mechanical properties in packages for stretchable electronic systems. Detailed experimental and theoretical studies quantitatively connect the geometries and elastic properties of the constituent materials to the overall mechanical responses of the integrated systems, with a focus on interfacial stresses, effective modulus, and maximum extent of elongation. Specific results include core/shell designs that lead to peak values of the shear and normal stresses on the skin that remain less than 10 kPa even for applied strains of up to 20%, thereby inducing minimal somatosensory perception of the device on the human skin. Additional, strain-limiting mesh structures embedded in the shell improve mechanical robustness by protecting the active components from strains that would otherwise exceed the fracture point. Demonstrations in precommercial stretchable electronic systems illustrate the utility of these concepts. Human skin-like core/shell material structure is presented for use in wearable, stretchable electronic systems. Here, an ultralow-modulus elastomer (core) with a thin enclosure (shell) serves to minimize interface stresses and mechanical constraints on natural motions, with ability to strain-isolate the electronics. Demonstration examples exploit emerging commercial classes of stretchable electronic system to wirelessly monitor a subject's motion and body temperature during exercise.

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Lee CH, Ma Y, Jang KI, Banks A, Pan T, Feng X et al. Soft core/shell packages for stretchable electronics. Advanced Functional Materials. 2015 Jun 1;25(24):3698-3704. https://doi.org/10.1002/adfm.201501086