TECHNICAL ABSTRACTS 4:15 - 4:30
“Surface Characterizations Of The Morphologies Of Polymer Blends By Tapping Mode Atomic Force Microscopy And Near Field Scanning Optical Microscopy” Shameika Vick, Dr. Carl Bonner Center for Materials Research Norfolk State University Norfolk, Va 23504 Abstract
Surface Characterization Studies of the Morphologies of Polymer Blends by Tapping-Mode Atomic Force Microscopy (TM-AFM) and Near-Field Scanning Optical Microscopy (NSOM) have been investigated. To analyze and identify the surface species, polymer blends were varied by relative concentration, deposition method, and temperature. Films were prepared by spin coating and drop casting from solutions onto silicon or glass substrates. Both phase and topographic imaging in tapping mode AFM were collected on these films under ambient conditions and at different tapping force levels. At certain tapping force levels, the phase-separated donor and acceptor regions were easily observed. Optical emission measurements were then made on the thin films to identify the composition of the phase separated regions as donor rich areas using nearfield scanning optical microscopy.
Monday, PM Session Chair
1:30 - 1:45
Technical Session 2 1:30 - 4:40 Spectroscopy and Atmospheric
Brentwood
Dr. Shawn Abernathy Howard University Presenters “Aerosol And Chemistry Measurements In The Tropical Atlantic: What Do In-Situ Atmospheric Measurements Tell Us About Chemical And Climate Change Earth System?”
Vernon R. Morris Graduate Program in Atmospheric Sciences and Department of Chemistry Howard University Washington, DC 20059 Abstract The chemistry and climate of the Earth system is strongly coupled to aerosol processes in the lower atmosphere. The climate systems of the tropical regions of our planet are particularly 93