Gold Bulletin

, Volume 50, Issue 4, pp 313–317 | Cite as

Core size matters! High Raman enhancing core tunable Au/Ag bimetallic core-shell nanoparticles

  • Diptiranjan Paital
  • Tapasi Sen
  • Amitava Patra
  • Krishna Kanta Haldar
Original Paper


Bimetallic core-shell nanostructures have been attracted tremendous attention due to their ability to form novel materials with unique chemical, optical, and physical properties. Here, we have studied the influence of core size of Au/Ag bimetallic core-shell nanostructures on the Raman enhancement efficiency with the Raman-active probe methylene blue. The surface-enhanced Raman scattering intensity is increased with increase in the core size of Au/Ag bimetallic core-shell nanoparticles. Interestingly, the enhancement factor is found to be 6.58 × 107 for the Au100/Ag core-shell nanoparticles and allows easy detection of analyte methylene blue. Thus, surface-enhanced Raman scattering properties of the metal nanoparticles are significantly enhanced due to the Au/Ag core-shell structures and the enhancement factor is dependent on the size of the core of the bimetallic nanoparticles.


Au/Ag Bimetallic Core-shell Raman SERS Enhancement 



This work is financially supported by Central University of Punjab, Bathinda, India by its research seeds grant.


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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Diptiranjan Paital
    • 1
  • Tapasi Sen
    • 2
  • Amitava Patra
    • 3
  • Krishna Kanta Haldar
    • 1
    • 3
  1. 1.Centre for Chemical science, School of Basic and Applied ScienceCentral University of Punjab, City CampusBathindaIndia
  2. 2.Institute of Nano Science and TechnologyMohaliIndia
  3. 3.Department of Materials ScienceIndian Association for the Cultivation of ScienceKolkataIndia

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