A California start up backed by the Google founders may have developed, finally, the break through that the solar energy business has been waiting for. Traditional solar cells have always required an expensive fabrication process that used silicon as a raw material. Nanosolar has developed a process that prints a nanotechnology based ink onto thin sheets that can be put on roofs of buildings, on top of cars and trucks, and anywhere that electric power is needed. The sheets produce electric power at about one-tenth the cost of existing panels.