Large Two-Photon Absorption and Intermolecular Interactions in Biotin-Chromophore Assembled Nanoparticles (Directorate of Materials Research: DMR-0303973) PI: T. Goodson III, University of Michigan

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Large Two-Photon Absorption and Intermolecular
Interactions in Biotin-Chromophore Assembled
Nanoparticles(Directorate of Materials Research
DMR-0303973) PI T. Goodson III, University of
Michigan

• In our biological imaging studies with large
  two-photon absorption materials we have
  demonstrated the feasibility of the use of a
  biotin-disulfide system where an organic
  solvent-soluble ligand, silver nanoparticles
  coated with a mixture of hexylthiol and biotin
  were synthesized via a one-phase method.
• The product particles displayed significant
  solubility in a water/ethanol mixture and
  demonstrated the tunability of the solubility
  properties of particles via multi-functionalizatio
  n.
• We have also investigated the intermolecular
  interactions in the prepared nanoparticle-chromoph
  ore systems and have found that the tightly
  packed chromophores on the metal particle appear
  to have much weaker interactions than one would
  expect!

Microscopy of Biotin-disulfide chromophore
nanoparticles. (Perry, Georgia Inst. Of Tech.)
Transient Absorption Spectroscopy of NLO
dye Ligated silver particles. (Goodson, U. of
Michigan)
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Large Two-Photon Absorption and Intermolecular
Interactions in Biotin-Chromophore Assembled
Nanoparticles(Directorate of Materials Research
DMR-0303973) PI T. Goodson III, University of
Michigan

• In professor Goodsons group, undergraduate
  student Unique Luna, and Latisha Burrel (a
  Detroit Public High School student) have carried
  out research on time-resolved spectroscopy. Both
  students have carried out steady-state
  measurements with the varying concentration
  samples and with the metal nanoparticles systems
  and related these findings to the time-resolved
  results.
• In professor Kippelens group, in connection with
  the REU Summer program, MDITR STC Center Hosted
  three minority students during the summer of
  2005 Allen McClinton (African American), Sarah
  Montgomery (Female), Evans Thompson (African
  American). The students learned about electronic
  materials fabrication and mobility measurements.

Undergraduate students Evans Thompson (Left),
Sarah Montgomery (Middle), and graduate student
Xiaohong Zhang (Right) during a thin-film
deposition. REU summer program 2005 in Prof.
Kippelens laboratories.
From left to right, Ramakrishna Gud
(Postdoctoral fellow), Ajit Bhaskar (graduate
student), Unique Luna (undergraduate student) T.
Goodson III (PI)