title: Quantum Plasmonics: Optical Monitoring of DNA-Mediated Charge Transfer in Plasmon Rulers.
abstract: Plasmon coupling between DNA-tethered gold nanoparticles is investigated by correlated single-particle spectroscopy and transmission electron microscopy for interparticle separations between 0.5 and 41 nm. Spectral characterization reveals a weakening of the plasmon coupling due to DNA-mediated charge transfer for separations up to 2.8 nm. Electromagnetic simulations indicate a coherent charge transfer across the DNA.
authors.affiliation: Department of Chemistry and The Photonics Center, Boston University, Boston, MA, 02215, USA.
authors.forename: Sarah
authors.initials: S
authors.lastname: Lerch
authors.affiliation: Department of Chemistry and The Photonics Center, Boston University, Boston, MA, 02215, USA.
authors.forename: Björn M
authors.initials: BM
authors.lastname: Reinhard
mesh_terms: D004247:DNA / Q000737:chemistry*; D006046:Gold / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry; D046529:Microscopy, Electron, Transmission; D011789:Quantum Theory; D012834:Silver / Q000737:chemistry
chemical_list: D012834:Silver; D006046:Gold; D004247:DNA
keywords: gold nanoparticles; plasmon coupling; plasmon hybridization; self-assembly; tunneling