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Facile synthesis of size and wavelength tunable hollow gold nanostructures for the development of a LSPR based label-free fiber-optic biosensor

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Title Facile synthesis of size and wavelength tunable hollow gold nanostructures for the development of a LSPR based label-free fiber-optic biosensor
 
Creator SATIJA, J
THARION, J
MUKHERJI, S
 
Subject SURFACE-PLASMON RESONANCE
CORE-SHELL NANOPARTICLES
SILVER NANOSTRUCTURES
REPLACEMENT REACTION
NANOSHELLS
SENSOR
NANOCAGES
NANORODS
SPECTROSCOPY
IMMUNOASSAY
 
Description Hollow bimetallic nanostructures have recently emerged as attractive plasmonic materials due to the ease of optical tunability by changing their size/composition. Currently available methods, in addition to being tedious and time-consuming, result in polydispersed nanostructures, particularly due to polydispersed templates. In this study, optically tunable hollow gold nanostructures (HGNS) were synthesized by galvanic replacement reaction between silver nanospheres (AgNS) templates and gold salt. Monodispersed AgNS were created using a gold seed-mediated heteroepitaxial growth. Since it is easier to ensure monodispersed gold nanosphere seeds, the resulting AgNS showed a tight control on size. Hollow gold nanostructures 43-70 nm in size with extinction maxima ranging between 450-590 nm were produced by varying the gold to silver molar ratio. The nanostructures were observed to be monodispersed and uniform (SD
 
Publisher ROYAL SOC CHEMISTRY
 
Date 2016-01-15T07:26:48Z
2016-01-15T07:26:48Z
2015
 
Type Article
 
Identifier RSC ADVANCES, 5(86)69970-69979
2046-2069
http://dx.doi.org/10.1039/c5ra13941d
http://dspace.library.iitb.ac.in/jspui/handle/100/18047
 
Language en