Hardness and Elastic Modulus on Six-Fold Symmetry Gold Nanoparticles

  • Materials (Basel). 2013 Jan 14;6(1):198-205. doi: 10.3390/ma6010198.
Manuel Ramos  1  2 ,  Luis Ortiz-Jordan  3 ,  Abel Hurtado-Macias  4 ,  Sergio Flores  5 ,  José T Elizalde-Galindo  6 ,  Carmen Rocha  7 ,  Brenda Torres  8 ,  Maryam Zarei-Chaleshtori  9 ,  Russell R Chianelli  10
Affiliations
  • 1. Departmento de Física y Matemáticas, Instituto de Ingenieríay Tecnología, UACJ, Avenida del Charro #450 Nte. Cd. Juárez, Chihuahua, C.P. 32312, Mexico. [email protected].
  • 2. Materials Research and Technology Institute, University of Texas at El Paso, 500 W. University Ave, El Paso TX 79968, USA. [email protected].
  • 3. Materials Research and Technology Institute, University of Texas at El Paso, 500 W. University Ave, El Paso TX 79968, USA. [email protected].
  • 4. Centro de Investigación en Materiales Avanzados S.C., Laboratorio Nacional de Nanotecnología-Chihuahua Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua, Apdo. Postal 31109, Mexico. [email protected].
  • 5. Departmento de Física y Matemáticas, Instituto de Ingenieríay Tecnología, UACJ, Avenida del Charro #450 Nte. Cd. Juárez, Chihuahua, C.P. 32312, Mexico. [email protected].
  • 6. Departmento de Física y Matemáticas, Instituto de Ingenieríay Tecnología, UACJ, Avenida del Charro #450 Nte. Cd. Juárez, Chihuahua, C.P. 32312, Mexico. [email protected].
  • 7. Materials Research and Technology Institute, University of Texas at El Paso, 500 W. University Ave, El Paso TX 79968, USA. [email protected].
  • 8. Materials Research and Technology Institute, University of Texas at El Paso, 500 W. University Ave, El Paso TX 79968, USA. [email protected].
  • 9. Materials Research and Technology Institute, University of Texas at El Paso, 500 W. University Ave, El Paso TX 79968, USA. [email protected].
  • 10. Materials Research and Technology Institute, University of Texas at El Paso, 500 W. University Ave, El Paso TX 79968, USA. [email protected].
PMID: 28809302 DOI: 10.3390/ma6010198
Abstract

The chemical synthesis of gold nanoparticles (NP) by using gold (III) chloride trihydrate (HAuCl∙3H₂O) and sodium citrate as a reducing agent in aqueous conditions at 100 °C is presented here. Gold nanoparticles areformed by a galvanic replacement mechanism as described by Lee and Messiel. Morphology of gold-NP was analyzed by way of high-resolution transmission electron microscopy; results indicate a six-fold icosahedral symmetry with an average size distribution of 22 nm. In order to understand the mechanical behaviors, like hardness and elastic moduli, gold-NP were subjected to nanoindentation measurements-obtaining a hardness value of 1.72 GPa and elastic modulus of 100 GPa in a 3-5 nm of displacement at the nanoparticle's surface.

Keywords
HRTEM; gold; hardness; nanoindentation; nanoparticles.
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