The monodisperse magnetic cobalt nanocrystals(NCs) of 7 nm in diameter were prepared by using high temperature solution phase reducing method. The UV-Vis spectrum showed that the cobalt NCs was stable. The structure o...The monodisperse magnetic cobalt nanocrystals(NCs) of 7 nm in diameter were prepared by using high temperature solution phase reducing method. The UV-Vis spectrum showed that the cobalt NCs was stable. The structure of the cobalt NCs were determined by XRD. The results showed that each of the cobalt nanoparticles is a single crystal with a complex cubic structure relating to the β phase of manganese. The XPS spectra indicate that the surface of Co nanoparticles was not oxidized or formed other compound. Two-dimensional order superlattices of the Co nanoparticles were formed by self-assembly technique.展开更多
We have prepared ordered porous alumina membrane. Metal Zn was deposited within the pores of alumina membrane by direct current. The alumina membrane with Zn in the pores was immersed in HgCl 2 solution and Hg 2Cl 2/A...We have prepared ordered porous alumina membrane. Metal Zn was deposited within the pores of alumina membrane by direct current. The alumina membrane with Zn in the pores was immersed in HgCl 2 solution and Hg 2Cl 2/Al 2O 3 ordered array was synthesized by utilizing Zn reduced HgCl 2. The XRD and TEM measuring demonstrated Hg 2Cl 2 located in the pores of alumina membrane and the diameters range from 30 to 80 nm.展开更多
文摘The monodisperse magnetic cobalt nanocrystals(NCs) of 7 nm in diameter were prepared by using high temperature solution phase reducing method. The UV-Vis spectrum showed that the cobalt NCs was stable. The structure of the cobalt NCs were determined by XRD. The results showed that each of the cobalt nanoparticles is a single crystal with a complex cubic structure relating to the β phase of manganese. The XPS spectra indicate that the surface of Co nanoparticles was not oxidized or formed other compound. Two-dimensional order superlattices of the Co nanoparticles were formed by self-assembly technique.
文摘We have prepared ordered porous alumina membrane. Metal Zn was deposited within the pores of alumina membrane by direct current. The alumina membrane with Zn in the pores was immersed in HgCl 2 solution and Hg 2Cl 2/Al 2O 3 ordered array was synthesized by utilizing Zn reduced HgCl 2. The XRD and TEM measuring demonstrated Hg 2Cl 2 located in the pores of alumina membrane and the diameters range from 30 to 80 nm.
