Samorí , Paolo : Self-assembly of conjugated (macro)molecules: nanostructures for molecular electronics



It is a great pleasure for me to express my deep gratitude to Prof. Dr. Jürgen P. Rabe for giving me the opportunity to work in his group. He has provided exceptional scientific guidance and a lively, informal yet stimulating atmosphere. I would like to also emphasize the importance of all the members of the group. In particular: Dr. J. Francis Wolf's helpful and constructive inspiring discussions and suggestions have played a key role; Dr. Wolfgang Stocker who has shown me several important experimental tricks of polymer science; Dr. Paul Hillner and Katherin Eichhorst-Gerner introduced me to the use of home made Scanning Tunneling Microscopes. Dr. Nikolai Severin, Thilo Böhme and Dr. Britta Schürmann have kindly supplied Montecarlo, molecular mechanics and dynamics simulations on PPE. Patrick Kölsch has created an exciting atmosphere in the group. He has been for me more than a colleague, a great friend; Evi Poblenz and Lothar Geyer provided an invaluable excellent technical support. Sincere thanks are also extended to Dr. Armelle Vix, Dr. Rebekka Epsch, Jörg Barner, Irakli Sikharulidze, Sabine Schönherr and Roger Bilewicz.

I owe much to Prof. Dr. Klaus Müllen and Dr. Viola Francke for their superb spirit of collaboration. I am deeply indebted to them for their ever lasting provision of high quality

synthetic materials and for being always ready to discuss results and future projects. I also gratefully acknowledge Johann D. Brand and Dr. Timo Magel for the synthesis of the molecules. In addition I would like to thank Dr. Volker Enkelmann for performing the XRD measurements on the oligomers of PPE.

I also offer my gratitude to Dr. Matthias Keil, Dr. Thomas Kugler and Prof. Dr. William R. Salaneck whose contribution in the photoelectron spectroscopies and doping of HBC and PPE have been remarkable. Also notable was the direct input to this work from Dr. Donizetti dos Santos, Prof. Dr. Roberto Lazzaroni and Prof. Dr. Jean Luc Brédas who furnished calculations important for interpreting the electronic structure of PPE and HBC. I am grateful for their help.

I am thankful to Dr. Alexandre Wei and Prof. Dr. Jean-Marie Lehn for their contribution to the challenging project of designing prototypes of molecular rectifier with alkenethiols.

The imaging of Scanning Force Microcopy tips by SEM and TEM have been carried out by Dr. Siegfried Rogaschewski and Dr. Christoph Böttcher respectively, while Dr. Petr Thiele


prepared the metallic substrates. The gold nanogaps have been produced by Dr. Andrew C.F. Hoole and Dr. Karl Kragler. I really appreciated their help.

I wish to thank Dr. Heimo Schnabblegger, Dr. Christine Göltner and Prof. Dr. Markus Antonietti for the fruitful collaboration that helped me to gain a better understanding of the self-assembly of PPE in thin films.

I would like to point out the importance of financial support from the European Union, especially for providing me a personal TMR grant "Nanowires from conjugated rigid-rod molecules". The research was also financed by the ESPRIT Long Term Research Project PRONANO (8523), TMR network SISITOMAS and BMBF Projekt "Molekulare Elektronik".

I desire moreover to thank all the friends that have made these four years in Berlin an unforgettable and terrific time. Last but not least, I want to truly acknowledge my family, Claudia, Bruno and Marco, who gave me the right force to tackle this experience and whose

love always meant light at the end of the tunnel.

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