TY - JOUR
T1 - Hydrothermal synthesis of silver nanoshells
T2 - Formation and plasmon hybridization
AU - Mondal, B.
AU - Saha, S. K.
N1 - Funding Information:
Acknowledgements BM acknowledges CSIR, New Delhi, Govt. of India, for his fellowship and SKS acknowledges DST, New Delhi for financial support.
PY - 2011/8/1
Y1 - 2011/8/1
N2 - 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 (TH ∼ 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.
AB - 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 (TH ∼ 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.
UR - http://www.scopus.com/inward/record.url?scp=79956127447&partnerID=8YFLogxK
U2 - 10.1007/s10853-011-5446-3
DO - 10.1007/s10853-011-5446-3
M3 - Article
AN - SCOPUS:79956127447
SN - 0022-2461
VL - 46
SP - 5153
EP - 5159
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 15
ER -