Kangwon Lee, 1st Place - TEM, X-Ray Imaging and Surface Probe Techniques

Water soluble conjugated (=conducting) polymeric materials containing a backbone and hydrophobic side chains in the structure made a rigid-rod and fiber shaped aggregation in a hydrophillic environment. The polymers having hexyl groups formed starfish-like self-assembled aggregates due to the phobic-phobic interaction. A copper TEM grid coated with a 20-30 nm film of pure carbon was held at the edge of a tweezer. A small drop of the polymeric solution was placed on the grid to form a bead. Excess sample was blotted off by touching with a filter paper and the sample was left to dry. Images were taken in bright-field mode with a transmission electron microscope at 120 kV accelerating voltage. Structures were imaged at slight underfocus in order to enhance contrast.
Kangwon Lee, 1st Place - TEM, X-Ray Imaging and Surface Probe Techniques
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