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0906873 Garno

In Situ AFM Studies of Porphyrins and Pthalocyanines Jayne C. Garno , Louisana State University & Agricultural and Mechanical College, DMR 0906873.

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0906873 Garno

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  1. In Situ AFM Studies of Porphyrins and Pthalocyanines Jayne C. Garno, Louisana State University & Agricultural and Mechanical College, DMR 0906873 Changes on surfaces during chemical reactions can be captured frame-by-frame in real time at the molecular level by in situ imaging in liquid media with scanning probe microscopy. We have gained new insight on the molecular pathway for surface self-assembly of 5,10,15,20-di-pyridin-4-yl porphyrins which spontaneously form a densely-packed monolayer film on gold surfaces. First the molecules assembly with the plane of the porphyrin macrocycle oriented in a flat arrangement with the surface. As more molecules assemble over time, the molecules rearrange into upright clusters in a perpendicular orientation. The results show that pyridyl functional groups direct the molecules into an upright orientation through nitrogen-gold chemisorption. (LeJuene, Z. M.; Garno, J. C. manuscriptin preparation.) Surface assembly of dipyridyl-functionalized porphyrins on Au(111). [A] Initially, a predominance of short structures are observed in the darker regions; however over time [B] the molecules rearrange to form an upright configuration (bright domains). The lower topograph and height profile show a square hole shaved in the film.

  2. Molecular-Level Studies with Scanning Probe MicroscopyJayne C. Garno, Louisana State University & Agricultural and Mechanical College, DMR 0906873 Garno and her students host booths for chemistry and nanoscience at regional outreach events in Louisiana, (Super Science Saturday and NanoDays) fostering K-12 outreach by “hands-on” activities with children. Her students teach undergraduates to use scanning probe instruments for research and teaching labs at LSU. Presentations and workshops were given to disseminate research results at local and national conferences, integrating contributions of under-graduates and industrial collaborators. Garno’s female graduate students conducted science outreach activities with local girl scouts and Louisiana science fairs, sponsored by Iota Sigma Pi, the national honor society for women in chemistry. Garno’s research group: (front row, left-to-right) Wilson Serem, Lauren Englade, Kathie Lusker, ChaMarra Saner. (back row) Jayne Garno, Venetia Lyles, Zorabel LeJeune, Stephanie Daniels, TianTian.

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