Abstract
Abstract Carbon nanotubes (CNTs) were discovered a decade ago and have received much attention for their potential applications, which include hydrogen storage, chemical sensors, nanoelectronic devices, and flat-panel field-emission displays. To date, the most widely used synthetic methods for preparing nanotubes include laser vaporization, arc-discharge, and chemical vapor deposition. Metal catalysts, such as Fe, Co, and Ni and metal alloys (e.g., Fe-Co and Fe-Ni), are sometimes used during these syntheses. The impurities typically present in as-prepared carbon nanotubes These defects, present either along the walls of the graphitic tubes or entangled within them, can reduce the electrical and structural properties of the nanotubes. Consequently, it is important to develop an efficient method for purification of the nanotubes that causes no damage. Various methods for purifying carbon nanotubes have been reported, including chemical oxidation, thermal oxidation, filtration, and chromatography. These techniques, however, are time-consuming and have high thermal budgets. Recently, microwave-assisted heating has received much attention because of its high sample throughput, small reagent volumes, reliable control over amenable temperatures and pressures. Despite the versatility of microwave techniques, they have not been used previously to purify samples of carbon nanotubes. One-dimensional nanostructures such as wires, rods, belts, and tubes have become the focus of intensive research owing to their unique applications in mesoscopic physics and fabrication of nanoscale devices. They are also expected to play an important role as both interconnects and functional units in fabricating electronic, optoelectronic, electrochemical, and electromechanical devices with nanoscale dimensions. Recently, many methods to fabricate nanowires have being developed1 like vapor-liquid-solid (VLS) methods, solution-liquid-solid (SLS) methods, solventhermal methods and template methods. Among those methods, the template methods are easier to control the shape and size of nanowires based on the morphology of template. Herein, we report a simple nanowires synthesis method by carbon nanotubes as a template coupled with nanoparticles self-assembly processes. With the reduced sizes the metal-particles, nanoparticles have highly placed importance on their unique applied potential in applied optics, electrical, and magnetism, such as fabricating biochip and biosensor. Lately, many methods to fabricate nanoparactiles have being developed like precipitation methods, sol-gel methods, and electrochemical methods. However, these methods need many complicated steps to synthesis. For this, we report a new technique to simple, rapid and stable nanoparticles synthesis method by carbon nanotubes.