Physicists at Oak Ridge National Lab have developed a spectroscopic [spek-roth-SCAW-pik] thermometer for nanomaterials and have mapped the temperature of a boron nitride [NYE-traide] nanocrystal to nanometer resolution. What hybridization shared by boron and nitrogen atoms in boron nitride gives it its unique hexagonal [hex-AG-uh-null] shape?
SP\({}^{2}\)