This week brought news of two advances in nanotechnology that could bring us ever-smaller devices with ever-increasing capacity.One brought us transistors a mere fraction of the size of most the advanced currently used on silicon chips. The other gave us the ability to store 250 DVDs worth of data on the area the size of a U.S. quarter.First, the transistors:A team from the University of Pittsburgh, led by Jeremy Levy, “created its nanotech transistors using two ceramic crystal materials known as lanthanum aluminate