Colloquia

The 2019-2020 Physics Colloquium Series

Next talk: Friday September 20, 2019 at 3:00pm
Speaker: Sebastian Diaz, NRL
Location: Planetary Hall 131

Biophotonics: Exploiting structural DNA to understand and optimize light harvesting and transfer

Abstract

DNA is a biocompatible scaffold that allows for the design of a variety of nanostructures, from double stranded DNA to more complex DNA origami and 3-D structures. By modifying the structures, with dyes, nanoparticles, or enzymes, we create complex light harvesting and energy transfer systems with features on the nm level. We study these systems with the intent to recreate the incredible efficiency observed in natural systems (e.g. photosynthetic systems) by parsing basic design rules. One focus area is looking at organic dyes in both the weakly coupled regime, the Förster resonance energy transfer (FRET) mechanism, and tightly packed systems that become strongly coupled, demonstrating coherent effects. We investigate how other parameters including geometries, cryogenic conditions, and fluency conditions can optimize light harvesting and controlled transfer. Additionally the use of inorganic nanoparticles allows us to exploit other mechanisms such as plasmonics, while enzymes can provide bioluminescent properties.

 

 

The complete lineup is available in the calendar below.

September 2019

Sun Mon Tue Wed Thu Fri Sat
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  • Speaker reception
  • Physics Colloquium. Speaker: Son Le (NIST)
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9
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11
  • Department Coffee & Snacks
12
13
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  • Department Coffee & Snacks
19
20
  • Speaker reception
  • Physics Colloquium. Speaker: Sebastian Diaz (NRL)
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  • Department Coffee & Snacks
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  • Speaker reception
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30