Nanotechnology provides highly promising potential for the replacement of conventional energy sources such as fossil and nuclear fuels and Renewable energy sources like geothermal energy, sun, wind, water, tidal or biomass. Breakthroughs in nanotechnology have opened up the possibility of moving beyond our current alternatives for energy supply by introducing technologies that are more efficient, inexpensive, and environmentally clean. Nanotechnology increases the strengths of many materials and devices as well as enhances efficiencies of monitoring devices remediation of environmental pollution and renewable energy system. Nanotechnology provides the potential to enhance energy efficiency across all branches of industry and enhanced renewable energy production through new technological solutions and optimized production technologies. Thus it is necessary for an electrical engineer to study the basics of nanotechnology. This book covers the complete detail of application of nanotechnology in Electrical Engineering.