Brazilian Journal of Physics

, Volume 45, Issue 2, pp 213–218 | Cite as

Enhanced Thermal Lens Effect in Gold Nanoparticle-Doped Lyotropic Liquid Crystal by Nanoparticle Clustering Probed by Z-Scan Technique

  • V. M. Lenart
  • R. F. Turchiello
  • G. F. Goya
  • S. L. GómezEmail author
Condensed Matter


This work presents an experimental study of the thermal lens effect in Au nanoparticles-doped lyotropic liquid crystals under cw 532 nm optical excitation. Spherical Au nanoparticles of about 12 nm were prepared by Turkevich’s method, and the lyotropic liquid crystal was a ternary mixture of SDS, 1-DeOH, and water that exhibits an isotropic phase at room temperature. The lyotropic matrix induces aggregation of the nanoparticles, leading to a broad and a red-shifted surface plasmon resonance. The thermal nonlinear optical refraction coefficient n 2 increases as a power of number density of nanoparticles, being possible to address this behavior to nanoparticle clustering.


Thermal lens Gold nanoparticles Clustering Lyotropic liquid crystal 



This work had the financial support of the Brazilian agencies CAPES, CNPq, FINEP, and Fundação Araucária, and it is part of the research program of the Instituto Nacional de Ciência e Tecnologia de Fluidos Complexos (INCT-FCx). The authors also thanks to the Advanced Microscopy Laboratory (LMA) of the Institute of Nanoscience of Aragon.


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Copyright information

© Sociedade Brasileira de Física 2015

Authors and Affiliations

  • V. M. Lenart
    • 1
  • R. F. Turchiello
    • 2
  • G. F. Goya
    • 3
  • S. L. Gómez
    • 1
    Email author
  1. 1.Physics DepartmentState University of Ponta GrossaPonta Grossa, PRBrazil
  2. 2.Physics DepartmentFederal University of Technology of ParanáPonta Grossa, PRBrazil
  3. 3.Department of Condensed Matter PhysicsAragon Institute of NanoscienceZaragozaSpain

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