Abstract
Nanostructure materials has been interested in many areas of science and technology. This research range contains metal, non-metal, high polymer material, magnetic material, etc. The nanomaterials has many properties different from bulk materials, such as their low melting point, hardness, electric conduction. Amount different elements of NPs, it is well known that silver NPs have properties superior to other nanostructured metal particles, such as their electrical conductivities, antimicrobial effects, optical properties, and applications in oxidative catalysis. For example, surface enhanced Raman scattering (SERS), which occurs on roughened metal NPs, is a powerful tool for microanalysis because it provides vibrational information on local areas and as such has potential for bio-sensing. The enhanced factor of SERS using silver NPs has been estimated experimentally to be 106–1015. It is expected that SERS is extraordinary sensitive to be a practical technique for the detection of single molecules. There are three subjects in this research, including using microwave heating method for synthesis of silver nanorods/nanowires, adding to metal seed and control different parameter effect for silver nanorods, and combination with optical lithography for selective area growth of silver nanoparticles. In the fabrication of silver nanoparticles, it was found that a feasible method for synthesizing silver nanorods/nanowires. A close chamber of a microwave system with precise temperature and control of different ramp is employed to synthesize the silver nanorods/nanowires, without templete or polymer capping agent existence. Using seeding growth method for synthesizing of silver nanorods, it was found that using metal nanoparticles as a catalyst and combination with microwave heating method, adjusting different reaction time and catalyst volume, can synthesize silver nanorods with different aspect ratio. In the combination optical lithography and microwave heating for selective area synthesize of silver nanoparticles, it was found that using this method, silver nanoparticles grew on pattern that we have been designed before so quickly. Using this method, we can extend to other pattern and other materials﹔fabricate on quartz, confer with different optical property, or with high affinity for the desired bio-functional molecules, have application for biosensor fabrication in the future.