SnO 2 nanowire logic devices on deformable nonplanar substrates

Gunchul Shin, Min Young Bae, Hyun Jin Lee, Sahng Ki Hong, Chang Hoon Yoon, Goangseup Zi, John A. Rogers, Jeong Sook Ha

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Logic inverters consisting of n-type FETs and resistors with SnO 2 nanowire channels were fabricated on films of the elastomer polydimethylsiloxane, prestrained and flattened into planar sheets from initial, preformed hemispherical shapes. Upon release, thin and narrow interconnects between individual devices in the arrays absorb induced strain by buckling into nonplanar sinusoidal shapes, to allow full recovery of the surfaces to their original convex geometries. The same physics allows deformation of convex shapes into concave ones, as well as more complex surfaces of coexisting convex and concave areas, and small regions with extremely stretched, locally tapered forms, all nondestructively achieved while maintaining electrical performance, enhanced by use of air gap gate dielectrics. This work shows, more generally, that nanowire devices with both conventional and unusual designs can be integrated into overall systems with irregular, nonplanar layouts, easily deformed in reversible fashion without any measurable alteration in electrical characteristics. The results suggest potential applicability of nanowire technologies in systems of tissue-matched implantable electronics for mounting directly on human organs or of sensor skins for integration with robotic manipulators.

Original languageEnglish
Pages (from-to)10009-10016
Number of pages8
JournalACS nano
Volume5
Issue number12
DOIs
Publication statusPublished - 2011 Dec 27

Keywords

  • deformable
  • elastomers
  • hemisphere
  • logic device
  • nanowires
  • stretchable

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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