Ultra-sensitive laser spectroscopy (Etchegoin, LeRu, Tilley)

Current work is expanding on this success by investigating SERS for more complex multiple-particle nanostructure geometries. We have also expanded now into subtler aspects of single-molecule detection, like the demonstration of isotopic variations in single molecule spectra and the possibility of observing single molecules in basic geometries involving controllable enhancements. The work has been complemented by additional activities in the related areas of single carbon nanotube detection with Raman spectroscopy.