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- W2109240211 abstract "Nanoshells composed of close-packed silver nanocrystals have been fabricated on silica spheres by electroless plating technique. By controlling the solution's pH in acidic condition during the synthesis of SiO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> -Ag core-shell particles, the homogeneous deposition resulted in thin and uniform silver shells. The deposition process was carried out in two steps: the first step was the modification of silica surface with the adsorption of 3-(2-Aminoethylamino) propyltrimethoxysilane (APTS), and the second step was the deposition of silver by reacting AgNO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> , dextrose and acetic acid. The reaction was performed at high temperature to accelerate the deposition process. The resulting silica-silver core-shell colloids were characterized with XRD, high-resolution TEM and SEM, and UV-visible spectroscopy. It was found that the core-shell structures, such as shell thickness and shell continuity, influenced significantly the absorption spectra. Moreover, the thin shell at about 3nm was very sensitive to the temperature, and the core-shell structure collapsed after 200 C treatment for 30 minutes probably due to the coalescence between adjacent Ag particles. When heating temperature was over than 300 C the Ag particles began to move and leave the SiO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> surface, causing the corlour of particles to fade gradually" @default.
- W2109240211 created "2016-06-24" @default.
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- W2109240211 date "2006-01-01" @default.
- W2109240211 modified "2023-09-26" @default.
- W2109240211 title "Preparation and Characterization of Ag Nanoshell on SiO/sub 2/ Spheres via Electroless Plating Technique in Acidic Conditions" @default.
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- W2109240211 doi "https://doi.org/10.1109/iconn.2006.340546" @default.
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