![]() ![]() The microspheres are robust and the high density of the SERS active Ag nanoparticles on the microspheres provided unique signal averaging for the method to be potentially quantitative which is an urgent goal for SERS substrate design and SERS analysis. ZnO/Ag2S coreshell nanorod arrays (NRAs) are successfully fabricated via chemical bath deposition procedure and subsequent successive ionic layer adsorption and reaction (SILAR) technique. Gold nanorods (NRs), pseudo-one-dimensional rod-shaped nanoparticles (NPs), have become one of the burgeoning materials in the recent years due to their anisotropic shape and adjustable plasmonic properties. SERS experiments with 4-aminobenzenethiol (4-ABT) as the indicator showed that the resulting multifunctional microspheres allowed the production of highly consistent enhancement of the Raman signals down to nM concentrations of 4-ABT, making them highly desirable candidates as the enhancers for high performance SERS analysis and as SERS optical labels in biomedical imaging. Spherical PSPAA micelles upon acid treatment are known to assemble into cylindrical micelles. Preliminary results indicated that the microspheres are easily prepared with exceptional chemical and physical uniformity. A variety of nanoparticles are encapsulated in polystyrene- block -poly (acrylic acid) (PSPAA) shells and then used as monomers for their self-assembly. The effects of annealing temperature, growth time, growth tem- peratureandsolutionpHforZnOontheopticalandelectrical properties of the prepared nanorods have been investigated fundamentally and the physics related to the possible corre- lations have been discussed with given reasons. The Ag nanoparticle shell is stabilized with a silica layer using a sol–gel process, which is also functionalizable with reactive epoxides for further bio-conjugation using epoxy ring-opening methods. core/shell nanorods (ZTNA) on ITO-coated substrate. The shell of silver nanoparticles, formed in situ by controlled interfacial reduction of AgNO 3 with polyvinylpyrrolidone (PVP), serves as the optimal metal enhancer for surface enhanced Raman spectroscopy ( SERS). The monodisperse polymer core of poly(styrene- co-acrylic acid), prepared by surfactant-free emulsion polymerization, serves as the supporting template to facilitate the synthesis and handling of the highly functionalized substrates to achieve consistent mechanical and surface chemical properties. A new type of polymer core and silver nanoparticle/ silica shell multifunctional composite microsphere is reported. ![]()
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