Nanoparticle Assemblies: Optical and Electrical Properties and Their Biomedical Sensing and Imaging Applications
Jaebeom Lee, University of Michigan, 2300 Hayward, HH Dow Building #3074, Ann Arbor, MI 49109, Nicholas A. Kotov, Chemical Engineering, University of Michigan, 2300 Hayward, HH Dow Building #3074, Ann Arbor, MI 49109, and Alexander O. Govorov, Ohio University, Department of Physics and Astronomy, Athens, OH 45701.
Designated assemblies of metallic and semiconductor nanoparticles and nanowires induced novel optical and electronic properties such as SERS-like enhancement of fluorescence. This paper present two important strateges to assemble nanoscale assembles; static and dynamic state conjugations. The static state conjugations accomplished by biological moieties, e.g., antigen-antibody, proved unique nanoscale optical electronic properties such as photoluminescence enhancement, two-photon absorption. The dynamic state of conjugation based on polymeric binding gave us a new concept of sensing and imaging technology based on fluorescence intensity change and its wavelength shift originated from the exciton-plasmon interaction between metallic and semiconductor nanomaterials and observed the phenomena experimentally and simulated them theoretically, which is useful to explain the interaction between homogeneous and heterogeneous nanoscale materials as well as the design of new sensing devices.