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Fabrication of NIR‐Excitable SERS‐Active Composite Particles Composed of Densely Packed Au Nanoparticles on Polymer Microparticles
Author(s) -
Kanahara Masaaki,
Satoh Hiroki,
Higuchi Takeshi,
Takahara Atsushi,
Jinnai Hiroshi,
Harano Koji,
Okada Satoshi,
Nakamura Eiichi,
Matsuo Yasutaka,
Yabu Hiroshi
Publication year - 2015
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201400191
Subject(s) - nanoparticle , polystyrene , composite number , fabrication , materials science , polymer , nanotechnology , chemical engineering , raman scattering , shell (structure) , adsorption , aqueous solution , dispersion (optics) , plasmon , raman spectroscopy , chemistry , composite material , optoelectronics , optics , medicine , alternative medicine , physics , organic chemistry , pathology , engineering
A simple fabrication method is demonstrated for surface‐enhanced Raman scattering (SERS)‐active plasmonic nanoballs, which consisted of Au nanoparticles (NPs) and core–shell polystyrene and amino‐terminated poly(butadiene) particles, by heterocoagulation and Au NP diffusion. The amount of Au NPs introduced into the core–shell particles increases with the concentration of Au NPs added to the aqueous dispersion of the core–shell particles. When the amount of Au NPs increases, closely packed, three‐dimensionally arranged and close‐packed Au NPs arrays are formed in the shells. Strong SERS signals from para ‐mercaptophenol adsorbed onto composite particles with multilayered Au NPs arrays are obtained by near‐infrared (NIR) light illumination.