Biosensors: Investigation of Plasmon Resonances in Metal Films with Nanohole Arrays for Biosensing Applications (Small 12/2011)

The cover picture shows an illustration of molecular binding to a nanohole array in an optically thin (50 nm) gold film. The holes are 150 nm in diameter and arranged in a 400 nm square lattice. An experimental and theoretical study of the optical properties of this and many other types of nanohole arrays is presented with a particular focus on understanding the plasmon resonances in order to optimize the design of refractometric biosensors based on these structures. Sensing “hot-spots,” where molecular binding gives the highest signal, are identified, and hole arrays with longor short-range order are compared. Additionally, near- and far-field optical properties are calculated by the multiple multipole program, and nanostructures are fabricated by focused ion beam and colloidal lithography. For more information, please read the Full Paper “Investigation of Plasmon Resonances in Metal Films with Nanohole Arrays for Biosensing Applications” by T. Sannomiya, A. B. Dahlin, and co-workers, beginning on page 1653. Cover image was prepared by Norma Graf.