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Surface Stress Properties of DNA-Microcantilever Systems

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Abstract

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.

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Authors and Affiliations

  1. Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, 200072, Shanghai, China

    Zouqing Tan, Nenghui Zhang & Jingjing Li

  2. Department of Mechanics, College of Sciences, Shanghai University, 200444, Shanghai, China

    Nenghui Zhang & Jingjing Li

Authors
  1. Zouqing Tan
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  2. Nenghui Zhang
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Correspondence to Nenghui Zhang.

Additional information

Project supported by the Natural Science Foundation of China (Nos. 10872121 and 11272193), the Research Innovation Program of Shanghai Education Commission (No. 09YZ07), the Systems Biology Research Foundation of Shanghai University and the Shanghai Leading Academic Discipline Project (No. S30106).

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Tan, Z., Zhang, N. & Li, J. Surface Stress Properties of DNA-Microcantilever Systems. Acta Mech. Solida Sin. 27, 122–128 (2014). https://doi.org/10.1016/S0894-9166(14)60022-7

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  • DOI: https://doi.org/10.1016/S0894-9166(14)60022-7

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