In this work, the highly ordered tungsten trioxide nanotube arrays have been synthesized by the combination of Sol-Gel chemical method and anodic aluminum oxide (AAO) templating method. The morphology and the chemical...In this work, the highly ordered tungsten trioxide nanotube arrays have been synthesized by the combination of Sol-Gel chemical method and anodic aluminum oxide (AAO) templating method. The morphology and the chemical composition of tungsten trioxide nanotubes arrays were characterized by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectroscopy (XPS) and X-ray diffraction (XRD). The results show that the wall thickness of the tungsten trioxide nanotubes arrays can be controlled by the immersion time. The growth mechanism of naotubes arrays is also discussed.展开更多
LB (Langmuir-Blodgett) technology was used to prepare the BSA monolayers m ore closely related to the half-layer biological membrane structure. The influen ce of bovine serum albumin (BSA) was studined on the polymorp...LB (Langmuir-Blodgett) technology was used to prepare the BSA monolayers m ore closely related to the half-layer biological membrane structure. The influen ce of bovine serum albumin (BSA) was studined on the polymorph, morphology and g rowth orientation of hydroxyapatite in the process of the biomineralization. XRD and SEM were respectively used to analysis the polymorph and morphology of the crystal induced by BSA monolayers. The results of XRD show that the HAP grows on ly along the (112) face, indicating a well oriented face in HAP. In addition, SE M shows that the morphologies of the HAP is of a network structure. In conclusio n, when the BSA form monolayers, it can be used as a template to induce the HAP to crystallize. Accordingly, the monolayers of the protein can be used to induce the inorganic materials to grow with a complex morphology and a well oriented f ace by biomimetic approach.展开更多
Highly ordered tungsten trioxide nanotube arrays were synthesized by the combination of (NH 4) 2WO 4 solution and anodic aluminum oxide(AAO) templating method. The morphology and the chemical composition of tungsten t...Highly ordered tungsten trioxide nanotube arrays were synthesized by the combination of (NH 4) 2WO 4 solution and anodic aluminum oxide(AAO) templating method. The morphology and the chemical composition of tungsten trioxide nanotube arrays were characterized by scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray photoelectron spectroscopy(XPS) and X-ray diffraction(XRD). The results show that the diameter of the tungsten trioxide nanotube arrays is about 165 nm and just equals to the diameter of pores of AAO template, which reveals that the diameter of the tungsten trioxide nanotube arrays is dependable on the size of the pores in the AAO template. The tungsten trioxide nanotubes are composed by tungsten trioxide nanoparticles formed by reaction (NH 4) 2WO 4550 ℃2NH 3↑+WO 3+H 2O↑ in the heating process.展开更多
Zinc oxide micro-crystals with special cystiform morphology were fabricated via an improved reverse micelle method. The as-obtained sample was characterized by powder X-ray diffraction (XRD) and scanning electron micr...Zinc oxide micro-crystals with special cystiform morphology were fabricated via an improved reverse micelle method. The as-obtained sample was characterized by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that these micro-crystals with unique structure have very strong and stable fluorescence emission in red-orange region. The possible growth mechanism and reason for special fluorescence property of the product were also discussed in detail.展开更多
文摘In this work, the highly ordered tungsten trioxide nanotube arrays have been synthesized by the combination of Sol-Gel chemical method and anodic aluminum oxide (AAO) templating method. The morphology and the chemical composition of tungsten trioxide nanotubes arrays were characterized by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectroscopy (XPS) and X-ray diffraction (XRD). The results show that the wall thickness of the tungsten trioxide nanotubes arrays can be controlled by the immersion time. The growth mechanism of naotubes arrays is also discussed.
文摘LB (Langmuir-Blodgett) technology was used to prepare the BSA monolayers m ore closely related to the half-layer biological membrane structure. The influen ce of bovine serum albumin (BSA) was studined on the polymorph, morphology and g rowth orientation of hydroxyapatite in the process of the biomineralization. XRD and SEM were respectively used to analysis the polymorph and morphology of the crystal induced by BSA monolayers. The results of XRD show that the HAP grows on ly along the (112) face, indicating a well oriented face in HAP. In addition, SE M shows that the morphologies of the HAP is of a network structure. In conclusio n, when the BSA form monolayers, it can be used as a template to induce the HAP to crystallize. Accordingly, the monolayers of the protein can be used to induce the inorganic materials to grow with a complex morphology and a well oriented f ace by biomimetic approach.
文摘Highly ordered tungsten trioxide nanotube arrays were synthesized by the combination of (NH 4) 2WO 4 solution and anodic aluminum oxide(AAO) templating method. The morphology and the chemical composition of tungsten trioxide nanotube arrays were characterized by scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray photoelectron spectroscopy(XPS) and X-ray diffraction(XRD). The results show that the diameter of the tungsten trioxide nanotube arrays is about 165 nm and just equals to the diameter of pores of AAO template, which reveals that the diameter of the tungsten trioxide nanotube arrays is dependable on the size of the pores in the AAO template. The tungsten trioxide nanotubes are composed by tungsten trioxide nanoparticles formed by reaction (NH 4) 2WO 4550 ℃2NH 3↑+WO 3+H 2O↑ in the heating process.
文摘Zinc oxide micro-crystals with special cystiform morphology were fabricated via an improved reverse micelle method. The as-obtained sample was characterized by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that these micro-crystals with unique structure have very strong and stable fluorescence emission in red-orange region. The possible growth mechanism and reason for special fluorescence property of the product were also discussed in detail.
