Surface stress-induced change in overall elastic behavior and self-bending of ultrathin cantilever plates

H Sadeghian Marnani, JFL Goosen, A Bossche, F van Keulen

Research output: Contribution to journalArticleScientificpeer-review

23 Citations (Scopus)

Abstract

In this letter, the dominant role of surface stress and surface elasticity on the overall elastic behavior of ultrathin cantilever plates is studied. A general framework based on two-dimensional plane-stress analysis is presented. Because of either surface reconstruction or molecular adsorption, there exists a surface stress and a surface elasticity imbalance between top and bottom surface of the cantilever. The surface elasticity imbalance creates an extra bending-extensional coupling which has not been taken into account previously. This leads to a modified extensional stiffness, bending stiffness and bending-extensional coupling stiffness. Due to the surface stress imbalance, an extended Stoney's formula for self-bending of ultrathin cantilevers is derived.
Original languageUndefined/Unknown
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume94
Issue number231908
Publication statusPublished - 2009

Keywords

  • academic journal papers
  • CWTS 0.75 <= JFIS < 2.00

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