Nanografi Nanotechnology

G eneral Information about Bismuth Oxide                                    Bismuth Oxide is one of the most important compounds of Bismuth metal. This compound consists of  Bismuth  metal and Oxygen. The color of the compound is bright yellow. Bismuth Oxide is insoluble in water.                                                 Applications of Bismuth Oxide                        Bismuth Oxide nanoparticles/nanopowder  have applications in electronic and in glass and ceramic industry. In electronics Bismuth Oxide nanoparticles/nanopowder are used in capacitors, pressure-sensitive resistors and solid electrolytes. In order to improve the performance of materials  Bismuth Oxide nanopartic...

The preparation of metallic nanoparticles was discussed in the last article, metallic nanoparticles part II (Top-Down and Bottom-Up). It was mentioned that there are two approaches for their preparation, top-down approach and bottom-up approach. The most used approach is the bottom-up approach in which the preparation of the nanoparticles is started from atomic level to the nano-scale. Here we discuss some of the used methods for this approach. Bottom-up approach depends on the synthesis of the metallic nanoparticles starting from the atoms of the metals. The main principle is to transfer the metallic substance into atoms in a process called nucleation and then to control the growth of the atoms until they reach the desired nano-size. Nucleation can be reached by the extensive heat of the metals in the gas phase or by the reduction of the metallic complexes in liquid phase conditions where the growth can be controlled by surfactant or stabilizer. The main methods for the preparati...