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Surface Modification of Gold Nanostars Through the Changes on Gold Seed Concentrations

Published online by Cambridge University Press:  02 April 2018

Juan Carlos Martinez Espinosa ,
Miguel Jose Yacaman ,
German Plascencia Villa ,
Victor Hugo Romero Arellano  and
Ana Karen Zavala Raya
Juan Carlos Martinez Espinosa*
Affiliation:
Instituto Politécnico Nacional-UPIIG, Silao de la Victoria, Guanajuato, Mexico.
Miguel Jose Yacaman
Affiliation:
Physics and Astronomy Department, University of Texas at San Antonio, San Antonio, TX, United States.
German Plascencia Villa
Affiliation:
Physics and Astronomy Department, University of Texas at San Antonio, San Antonio, TX, United States.
Victor Hugo Romero Arellano
Affiliation:
Centro Universitario de Tonala, Universidad de Guadalajara, Tonala, Jalisco, Mexico.
Ana Karen Zavala Raya
Affiliation:
Nanobiotech A.C., Leon, Guanajuato, Mexico.
*
*(Email: [email protected])
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Abstract

Due to its excellent optical properties, gold nanomaterials with anisotropic morphology are playing an important role in biomedical applications, specifically in the use of Surface Enhanced Raman Spectroscopy (SERS) technique for biological assays. In this work, we verified the behavior of the star shape nanoparticle peaks obtained by chemical synthesis (precursor reactant: HAuCl4, cationic surfactant: CTAB) and whose peaks were formed from the different concentrations of gold seeds (55, 65, 75 and 85 ul) which were added to the total solution (5.275 ml). The shape and size of the nanoparticles was verified with a Hitachi S-5500 microscope with a BF & DF SEM / STEM detector, and for the diameter distribution (hydrodynamic) was carried out by the dynamic light distribution technique with a Malvern DLS system Zetasizer Nano ZS. Particle sizes (peak-to-peak considering) were obtained with variations from 107 to 166 nm. The results suggest adding 75 ul of gold seeds to obtain uniform nanostars with well defined peaks. These gold nano-stars could be applied for identification of specific membrane markers for the study of different types of cancer by the SERS technique.

Keywords

nanostructurechemical synthesisoptical propertiesscanning transmission electron microscopy (STEM)
Type
Articles
Information
MRS Advances , Volume 3 , Issue 41: Nanomaterials , 2018 , pp. 2449 - 2454
Copyright
Copyright © Materials Research Society 2018 

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