Acta Mechanica Solida Sinica

, Volume 27, Issue 2, pp 122–128 | Cite as

Surface Stress Properties of DNA-Microcantilever Systems

  • Zouqing Tan
  • Nenghui Zhang
  • Jingjing Li


For the first time, the connection between surface stress and nanoscopic interactions of DNA adsorbed on microcantilever is established by combining Strey’s mesoscopic liquid crystal theory and Stoney’s formula. It is shown that surface stress depends not only on biomolecular interactions of DNA biofilm but also on mechanical properties of cantilever. Considering the correlativity between grafting density and chain length of DNA chain, we discuss the differences between DNA-microcantilever system and DNA solution system. The major theoretical achievement of this model is to identify the main contributions to surface stress under different detection conditions. This provides guidelines for designing new biosensors with high sensitivity and improved reliability.

Key Words

surface stress DNA hybridization microcantilever biosensor energy method biomolecular interaction 


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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics and Technology 2014

Authors and Affiliations

  1. 1.Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai Institute of Applied Mathematics and MechanicsShanghai UniversityShanghaiChina
  2. 2.Department of Mechanics, College of SciencesShanghai UniversityShanghaiChina

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