Student Project Abstracts 2005 - Pluto - University of Washington

DETERMINATION OF MOLECULAR ORIENTATION OF SELF-ORGANIZED AGGREGATES OF NEW LIQUID-CRYSTAL PERYLENE DYEThe X-ray reflectivity (XRR) data came to no conclusions. Itwas decided that the concentration of the sample was too dilute toobtain accurate information on the thickness, density, and roughnessof the thin film (Figure 8).Funding provided by the Center on Materials and Devicesfor Information Technology Research (CMDITR), an NSF Scienceand Technology Center No. DMR 0120967Natalie Thompson is finishing her senior year at Georgia Tech and plansto graduate in Spring 2006. She would like to thank Dr. Neal Armstrong,Alex Veneman, and Nira Kumaran for their support and friendship.Angle (2θ)Figure 8. XRR graphCONCLUSIONSLB formation of thin films of PTCDI results in a stiff film thatcan be transferred to a silanized surface using horizontal transfer.These thin films form islands with only one deposition, butmultiple depositions results in linearity of the thin film. Also,annealing of the sample allows the molecules to reorganize intolinear aggregates. Spectroscopic measurements led to no solidconclusions about the orientation of the molecules within the thinfilm, but hinted that the molecules might be organized outside ofthe sample plane (parallel to the substrate).REFERENCES1Brédas, J. L., Calbert, J. P. da Silva Filho, D. A., Cornil, J. Proceedingsof the National Academy of Sciences. 2002, 99, 5804.2Donley, Carrie L., Xia, Wei, Minch, Britt A., Zangmeister, RebeccaA. P., Drager, Anthony S., Nebesny, Ken, O’Brien, DavidF., Armstrong, Neal R. Langmuir. 2003, 19, 6512.3Flora, Ware, H., Mendes, Sergio B., Doherty, III, Walter J., Saavedra,S. Scott, Armstrong, Neal R. Langmuir. 2005, 21, 360.4Xia, Wei, Minch, Britt A., Carducci, Michael D., Armstrong,Neal R. Langmuir. 2004, 20, 7998.5Donley, Carrie L., et al. J. Mater. Res. 2004, 19, 20876Doherty, III, Walter J., Simmonds, Adam G., Mendes, Sergio B.,Armstrong, Neal R., Saavedra, S. Scott. In press.ACKNOWLEDGEMENTS-Dr. Neal R. Armstrong, Professor of Chemistry and OpticalSciences, University of Arizona-Armstrong Research Group122 CMDITR Review of Undergraduate Research Vol. 2 No. 1 Summer 2005