期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 10, 期 11, 页码 7758-7761出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2010.2838
关键词
AgI; Nanoparticle; Core-Shell; Silica-Coating; Sol-Gel; Protein Immobilization
This paper describes a method for preparing silica-coated silver iodide (AgI/SiO(2)) particles and immobilizing proteins on the AgI/SiO(2) particles. Colloid solution of AgI particles was prepared by mixing AgClO(4) aqueous solution and KI aqueous solution. Silica-coating of the AgI particles was performed by adding 3-mercaptopropyltrimethoxysilane, tetraethylorthosilicate/ethanol solution and NaOH aqueous solution successively to the AgI colloid solution. TEM observation revealed that the AgI nanoparticles were coated with uniform silica shell. The AgI/SiO(2) particles were surface-modified with 3-aminopropyltrimethoxysilane and succinic anhydride. It was confirmed by XPS measurement that amino group or carboxyl group was introduced onto the AgI/SiO(2) particles. Protein-immobilization was performed in aqueous solution with bovine serum albumin (BSA) in the presence of the surface-modified AgI/SiO(2) particles. UV-VIS absorption spectroscopy revealed that the BSA was adsorbed on the surface-modified particles.
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