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      Laser synthesized gold nanoparticles for high sensitive strain gauges

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      Author
      Burzhuev, S.
      Dana, A.
      Ortac, B.
      Date
      2013-12-01
      Source Title
      Sensors and Actuators A: Physical
      Print ISSN
      0924-4247
      Publisher
      Elsevier
      Volume
      203
      Pages
      131 - 136
      Language
      English
      Type
      Article
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      Abstract
      We demonstrate high strain sensitivity property of gold nanoparticle (Au-NP) thin films fabricated on flexible polydimethylsiloxane (PDMS) substrates. This behavior is attributed to quantum tunneling effect that is highly dependent on nanoparticle separation. Au-NPs were synthesized in water by nanosecond laser ablation method. The clean surface providing high tunneling decay constant, size of the Au-NPs and Au-NPs aggregate clusters offer advantages for high sensitivity strain sensor. We prepared Au-NPs films on flexible PDMS substrate by using hands-on drop-cast method. To obtain high gauge factor (g factor), we investigated the nanoparticles concentration on the substrate. Laser-generated Au-NPs films demonstrated g factor of ∼300 for higher than 0.22% strain and ∼80 for the strain lower than 0.22% strain, which is favorably comparable to reported sensitivities for strain sensors based on Au-NPs. Mechanical characterizations for the prolonged working durations suggest long term stability of the strain sensors. We discuss several models describing conductance of films in low and high strain regimes.
      Keywords
      Laser ablation
      Gold nanoparticles
      Gold nanoparticle films
      Quantum tunneling effect
      Strain gauges
      Permalink
      http://hdl.handle.net/11693/11598
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.sna.2013.08.034
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      • Institute of Materials Science and Nanotechnology (UNAM) 1841
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