2. Academic Validation
  3. Hardness and Elastic Modulus on Six-Fold Symmetry Gold Nanoparticles

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

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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