Abstract
This work describes X-ray imaging of mouse using a colloid solution of silica-coated Au (Au/SiO2) nanoparticles. A colloid solution of Au nanoparticles with a size of 16.9 nm was prepared using hydrogen tetrachloroaurate (III) trihydrate as Au source and sodium citrate as reducing reagent. Silica coating of the Au nanoparticles was performed by modifying the Au nanoparticle surface with (3-aminopropyl)trimethoxysilane and then by depositing silica nuclei generated through a sol–gel reaction of tetraethyl orthosilicate in water/ethanol initiated with sodium hydroxide on the surface-modified surface, which produced Au/SiO2 particles with a size of 136.4 nm. A computed tomography value of the Au/SiO2 colloid solution with an Au concentration of 0.036 M was as high as 1,184.8 Hounsfield units, which was quite higher than that of a commercial X-ray contrast agent with the same iodine concentration as the Au concentration. Tissues of mouse could be imaged by injecting the Au/SiO2 particle colloid solution into them.
Highlights
Experimental detailsNanocomposites are materials of considerable interest because of their unique design and excellent properties
Compared to NiO, NiO/CoPc shows very good absorption in the range 300–750 nm. This corresponds to the B band (Sorret band) and Q band which are characteristic of metal phthalocyanines
NiO/CoPc nanocomposite is synthesized by simple solvent evaporation method
Summary
Nanocomposites are materials of considerable interest because of their unique design and excellent properties. Phthalocyanines are p-type organic semiconductors with high stability, having wide range of applications from medicine to microelectronics [2].Out of these; metal phthalocyanines (M.Pc) have invited attention due to their good thermal and chemical stability, photoconductivity and semi-conducting nature. Their thermal and chemical stability are important properties that make them suitable for electrochemical sensors [3]. The thermal, structural and optical properties of the nanocomposite are studied and compared with that of NiO nanoparticles. This is the first report on the synthesis and characterization of NiO/CoPc nanocomposites. PL spectra of the samples at room temperature are measured using a Fluoromax 3 spectrophotometer
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