科研之友
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摘要
Well-defined silver nanocomposites were prepared by using copolymer polyacrylonitrile-block-poly (ethylene glycol)-block-polyacrylonitrile (PAN-b-PEG-b-PAN) as stabilizer under ultrasonic irradiation. The product was characterized by X-ray diffraction (XRD), Fourier transfer infrared spectrometer (FTIR), transmission electron microscope (TEM), UV-Vis spectrum, and thermal gravity analysis (TGA). FTIR results revealed that the PEG backbone had not been destroyed after ultrasonic irradiation. Low initial silver ion concentration allowed for yielding silver nanoparticles with a small size and the size of the silver nanoparticles increased with the increasing of silver ion concentration. The size of the silver nanoparticles decreased with the increasing of the copolymers concentration. The mechanism of forming silver nanoparticles was discussed.
- 出版日期2006-8
- 单位陕西师范大学
