Journal of Materials Science

, Volume 46, Issue 15, pp 5153–5159 | Cite as

Hydrothermal synthesis of silver nanoshells: formation and plasmon hybridization

  • B. Mondal
  • S. K. SahaEmail author


Silver nanoshells with varying diameters are synthesized using Polyacrylamide (PAM) in a controllable way by the hydrothermal process followed by calcinations to investigate the plasmon hybridization. At relatively lower hydrothermal temperature (T~ 415 K), an assembly of silver nanoparticles (NPs) along the PAM chain is formed exhibiting transverse (453 nm) and longitudinal (949 nm) surface plasmon resonance (SPR) peaks. With increasing TH (~510 K), this assembly of NPs disrupt into segments and create a homogeneous phase of PAM–silver composites, which upon cooling form globules due to agglomeration. During calcinations at 650 K, PAM is degraded into several gases (NH3, CO2, and water vapor) to form nanobubbles, which are trapped inside the globule and coalescence into a single bubble as a result; the molten state containing the NPs forms a spherical shell to minimize the surface energy. The absorption spectra are de-convoluted into three peaks, which are attributed to the hybridization between anti-bonding and bonding SPR modes of individual nanoshells.


Surface Plasmon Resonance Surface Plasmon Resonance Peak Nanometric Dimension Plasmon Hybridization Dielectric Core 



BM acknowledges CSIR, New Delhi, Govt. of India, for his fellowship and SKS acknowledges DST, New Delhi for financial support.


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© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Department of Materials ScienceIndian Association for the Cultivation of ScienceKolkataIndia

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