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Contact Information

Office: WEL: 3.132C
Phone: 512-232-2824

Lab

Office: WEL: 3.132C
Phone: 512-232-3339

David A. Vanden Bout

davandenbout@mail.utexas.edu

Professor, Faculty



Research Group

Vanden Bout Group



Education

PhD, Chemical Physics, University of Texas at Austin, 1995
BS, Chemistry, Duke University, 1990

NSF Postdoctoral Fellow, University of Minnesota 1995-97



Awards

Research Corporation Cottrell Scholar, 2000
Research Corporation Research Innovation Award, 1999
Alfred P. Sloan Research Fellow, 1999
Camille & Henry Dreyfus Foundation New Faculty Award, 1997



Affiliations

Center for Nano- and Molecular Science and Technology; IGERT: Atomic and Molecular Imaging; Texas Materials Institute



Spectroscopy/Microscopy of Heterogeneous Materials


Research in the Vanden Bout group is focused on spectroscopically probing condensed phase systems that are inherently heterogeneous in nature. The difficulty in studying these non-ideal heterogeneous materials is that they contain a wide variety of environments. Bulk spectroscopic methods average together multitudes of these different environments, thereby masking the source of particular features and complicating the interpretation of experimental results. Two recent experimental developments have made direct probing of heterogeneous systems possible: near-field scanning optical microscopy (NSOM) and single molecule spectroscopy (SMS).

Our NSOM studies are devoted to investigating the electronic and optical properties of organic thin film materials. In these materials, it is critical to understand the role of various charge and energy carriers in the system. However, vapor-deposited and spin cast thin films have widely varied morphologies that strongly affect their properties. Our research is eliminating these problems by directly probing thin films with NSOM. A wide array of techniques can be used for imaging including transmission, fluorescence, polarization, and time-resolved spectroscopies. We are currently studying a number of materials including polyfluorene, sexi-thiophene, poly thiophene and others.

The second half of our work deals with dynamics near the glass transition in small molecule liquids and polymers. We are developing a microscopic picture of molecular motion near the glass transition by following individual probe molecules dissolved in a glass forming material. Our first experiments are probing highly dilute dye molecules in ortho-terphenyl. Future work will study dynamics in other heterogeneous systems including micelles, ultra-thin polymer films, and phase separated polymer films.

 



Representative Publications

“Correlation of Morphology with Photocurrent Generation in a Polymer Blend Photovoltaic Device” David P. Ostrowski and David A. Vanden Bout, Small, 10(9) 1821-1829 (2014).

 

 “Quantifying the polarization of exciton transitions in double walled nanotubular J-aggregates” Katie A. Clark, Craig W. Cone, and David A. Vanden Bout, J. Phys. Chem. B, 117, 26473-26481 (2013).

 

 “Chromophore Controlled Self-Assembly of Highly-Ordered Polymer Nanostructures” Matthew C. Traub, Kateri H. DuBay, Shauna E. Ingle, Xinju Zhu, Kyle N. Plunkett, David R. Reichman, and David A. Vanden Bout, J. Phys. Chem. Lett., 4 (15), 2520–2524 (2013).

 

Mimicking Conjugated Polymer Thin Film Photophysics with a Well-defined Triblock Copolymer in Solution”  Johanna Brazard, Robert J. Ono, Christopher W. Bielawski, Paul F. Barbara, David A. Vanden Bout, J. Phys. Chem. C,117, 4170-4176 (2013).

 

 "Self-Assembly of Highly Ordered Conjugated Polymer Aggregates with Long-Range Energy Transfer" Jan Vogelsang, Takuji Adachi, Johanna Brazard, David A. Vanden Bout, Paul F. Barbara, Nature Materials, 10, 942–946 (2011).