Department
Chemistry
Major
Physics and Chemistry
Research Advisor
Peacher, Jerry
Reddy, Prakash
Advisor's Department
Chemistry
Second Advisor's Department
Chemistry
Funding Source
UMR Opportunities for Undergraduate Research Experiences (OURE) Program
Abstract
The photo refractivity of organic-inorganic hybrid composites doped with nickel sulfide (NiS) nanocrystals is described. The nanocrystals were characterized using visible-absorption spectroscopy, energy-dispersive X-ray spectroscopy, and transmission electron microscopy. The nanocrystals were further modified by ligand exchange, lowering the over-modulation voltage without sacrificing diffraction efficiency as well as increasing the two-beam coupling gain coefficient. Photoconductivity measurements were used to determine the overall quantum efficiency of the photorefractive samples. The measurements represent a significant increase in photo refractivity when compared to other organic-inorganic hybrid photorefractive composites.
Biography
Tyler Martin Fears is a student of Physics and Chemistry at the University of Missouri at Rolla.
Research Category
Natural Sciences
Presentation Type
Poster Presentation
Document Type
Poster
Location
Havener Center, Carver-Turner Room
Presentation Date
11 April 2007, 1:00 pm - 3:00 pm
Photorefractivity of Organic-Inorganic Hybrid Composites Photosensitized with Nickel-Sulfide Nanocrystals
Havener Center, Carver-Turner Room
The photo refractivity of organic-inorganic hybrid composites doped with nickel sulfide (NiS) nanocrystals is described. The nanocrystals were characterized using visible-absorption spectroscopy, energy-dispersive X-ray spectroscopy, and transmission electron microscopy. The nanocrystals were further modified by ligand exchange, lowering the over-modulation voltage without sacrificing diffraction efficiency as well as increasing the two-beam coupling gain coefficient. Photoconductivity measurements were used to determine the overall quantum efficiency of the photorefractive samples. The measurements represent a significant increase in photo refractivity when compared to other organic-inorganic hybrid photorefractive composites.
