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Coating identification in spherical and anisotropic gold nanomaterials by SERS technique

Published online by Cambridge University Press:  16 May 2018

Juan Carlos Martinez Espinosa ,
Miguel Jose Yacaman ,
German Plascencia Villa ,
Ana Karen Zavala Raya ,
Jacqueline Torres Ramirez ,
Ana Pamela Andrade Perez  and
Teodoro Cordova Fraga
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.
Ana Karen Zavala Raya
Affiliation:
Departmen Universidad de Guanajuato-DCI, León, Guanajuato, Mexico.
Jacqueline Torres Ramirez
Affiliation:
Instituto Politécnico Nacional-UPIIG, Silao de la Victoria, Guanajuato, Mexico.
Ana Pamela Andrade Perez
Affiliation:
Instituto Politécnico Nacional-UPIIG, Silao de la Victoria, Guanajuato, Mexico.
Teodoro Cordova Fraga
Affiliation:
Departmen Universidad de Guanajuato-DCI, León, Guanajuato, Mexico.
*
*(Email: [email protected])
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Abstract

Recently the use of nanomaterials for the diagnosis and detection of malignant diseases has increased due to the versatility and properties of these nanostructures. For this work 60 nm commercial gold nanoparticles (TED PELLA inc.) and Nanostars manufactured by chemical synthesis (precursor reagent: HAuCl4, cationic surfactant: CTAB) of 117 nm were used for coating. Malachite green Isotyocianate (MGITC), mPEG-SH and ortho-pyridyldisulfide-polyethylene glycol-N-succinimidyl propionate (OPSS-PEG-NHS) was used. A SERS active nanoparticle complex was obtained by addition of a solution of MGITC to the gold nanoparticles colloidal solution in a 1:6 ratio. Later, an mPEG-SH solution was added to the mix. The nanoparticle-MGITC-mPEG-SH complex stability was revised using a UV-Vis spectrophotometer and a JEOL JEM 1000 transmission electron microscope. The SERS spectra were registered with a Raman Thermoscientific DXR microscopy system. Amplified bands associated with OPSS-PEG-NHS were identified in 389, 622, 859, 929, 1080, 1283, 1360, 1443, 1490 and 1450 cm-1. The results indicate that through this methodology it is possible to identify gold nanomaterials coated with polymer through the Raman technique. In addition, greater amplification is observed with the use of nanostars compared to gold spheres. Finally, these nanomaterials are available for the marking of specific membrane for the study of different types of cancer by the SERS technique.

Keywords

Aucoatingnanostructure
Type
Articles
Information
MRS Advances , Volume 3 , Issue 41: Nanomaterials , 2018 , pp. 2461 - 2465
Copyright
Copyright © Materials Research Society 2018 

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