David Waldeck
Chemistry and Dynamics in the Condensed Phase. Professor Waldeck's research program uses methods of spectroscopy, electrochemistry, and microscopy to investigate primary processes in the condensed phase, which includes liquids, solids and liquid/solid interfaces. Current themes of his research are the fundamental understanding of electron transfer reactions, electron transport in supramolecular structures, and nanophotonics.
Solution Studies. His research program studies electron transfer processes experimentally in order to directly evaluate and improve theoretical models. Currently, his group is investigating how the electron transfer rate in semiconductor nanoparticle assemblies depends on energetic, geometric, and electrostatic features of the assemblies. Other efforts are studying electron transfer between semiconductor nanoparticles and conjugated polymers and how it depends on the energetic, electrostatic, and chirality of the constituents. A major goal of these studies is to understand how the structural and energetic hierachy of nanometer scale assemblies can be manipulated to control the electron transfer.
Interfacial Charge Transfer. This effort probes charge transfer through monolayers and individual molecules by electrochemical and/or conducting probe methods. Previous work has used electrochemical studies to elucidate how the molecular properties (e.g., electronic character, chirality, and the nature of the molecule-electrode linkage) affect the observed tunneling barriers and molecular conductivities. Current work is investigating how to manipulate the electronic and chemical nature of monolayer films to enhance the electronic interaction between a redox moiety and the electrode, with a particular focus on better understanding how to ‘wire’ biomolecules (proteins and oligonucleotides) to electrodes.
Nanophotonics. Technological breakthroughs in fabrication and characterization are allowing his group to probe the nature of light-matter interactions (photonics) for nanostructures and molecular assemblies. This work aims to develop a better understanding of the novel optical properties displayed by nanostructures and how to exploit them for applications in sensing and energy conversion.
Name | Position | |
|---|---|---|
| Beall, Edward | Graduate Student | ejb65@pitt.edu |
| Bloom, Brian | Graduate Student | bpb8@pitt.edu |
| Davis, Arthur | Graduate Student | acd47@pitt.edu |
| Lamont, Dan | Graduate Student | dnl22@pitt.edu |
| Wei, Simon | Graduate Student | jiw105@pitt.edu |
| Wierzbinski, Emil | Graduate Student |
Affiliation:
ChemistryUniversity of Pittsburgh
Websites:
Affiliation:
ChemistryUniversity of Pittsburgh
Websites:
Affiliation:
ChemistryUniversity of Pittsburgh
Websites:
Affiliation:
ChemistryUniversity of Pittsburgh
Websites:
Affiliation:
ChemistryUniversity of Pittsburgh
Websites:
Emil Wierzbinski
Graduate Student
G-10 Chevron Science Center, Pittsburgh PA, 15213
Affiliation:
ChemistryUniversity of Pittsburgh
Websites:
- "Photoisomerization dynamics of stilbenes," David H. Waldeck, Chem. Rev. 91, 415 (1991)
- "Noncovalent Engineering of Carbon Nanotube Surfaces by Rigid, Functional Conjugated Polymers," Jian Chen, Haiying Liu, Wayne A. Weimer, Mathew D. Halls, David H. Waldeck, and Gilbert C. Walker, J. Am. Chem. Soc. 124, 9034 (2002)
- "Breakdown of Kramers theory description of photochemical isomerization and the possible involvement of frequency dependent friction" Stephan Velsko, Graham Fleming, and David H. Waldeck, J. Am. Chem. Soc.124, 9591 (2002)
- "Hydrogen-bonding self-assembly of multichromophore structures," Paolo Tecilla, Robert P. Dixon, Gregory Slobodkin, David S. Alavi, David H. Waldeck, Andrew D. Hamilton, J. Am. Chem. Soc. 112, 9408 (1990)
- "Carbon Nanotube-Polymer Nanocomposite Infrared Sensor." Basudev Pradhan, Kristina Setyowati, Haiying Liu, David H Waldeck, and Jian Chen. Nano Letters 8.4 (2008)
- "Voltage-Induced Long-Range Coherent Electron Transfer Through Organic Molecules." Karen Michaeli, David N Baratan, David H Waldeck, and Ron Naaman. Proceedings of the National Academy of Sciences (2019)
- "Controlling Chemical Selectivity in Electrocatalysis with Chiral CuO-Coated Electrodes." KB Ghosh, Wenyan Zhang, F Tassinari, Y Mastai, O Lidor-Shaley, R Naaman, P Moellers, D Nuerenberg, H Zacharias, J Wei, E Wierzbinski, and DH Waldeck. Journal Phys. Chem. C 123.5 (2019)
- "Nano Ferromagnetism: Single Domain 10 nm Ferromagnetism Imprinted on Superparamagnetic Nanoparticles Using Chiral Molecules." Guy Koplovitz, Gregory Leitus, Supriya Ghosh, Brian P Bloom, Shira Yochelis, Dvir Rotem, Fabio Vischio, Marinella Striccoli, Elisabetta Fanizza, Ron Naaman, David H Waldeck, Danny Porath, and Yossi Paltiel. Small 15.1 (2019)
- "What is Beyond Charge Trapping in Semiconductor Nanoparticle Sensitized Dopant Photolumiescence?" Prasenjit Manna, Gouranga H Debnath, David H Waldeck, and Prasun Mukherjee. Journal of Physical Chemistry Letters 9.21 (2018)
- "Directing Charge Transfer in Quantum Dot Assemblies." Brian P Bloom, Ruibin Liu, Peng Zhang, Supriya Ghosh, Ron Naaman, David N Beratan, and David H Waldeck. Accounts of Chemical Research 51.10 (2018)
More Members
In recent years there have been fascinating discoveries of several types of quantum condensed forms of matter exhibiting novel phenomena arising from interactions among the constituents, such as, electrons in solids, or atoms & molecules in ultracold matter. Common to all of these is the emergence of spectacular phases with novel macroscopic behavior in the vicinity of quantum instabilities. Phenomena such as these give glimpses into the nature of the rich underlying quantum world, and provide motivation for theoretical study of correlated Fermi systems.
Dr. Mostafa Bedewy is an Assistant Professor of Industrial Engineering at the University of Pittsburgh, where he leads the NanoProduct Lab (www.nanoproductlab.org). Before that, he worked as a Postdoctoral Associate at the Massachusetts Institute of Technology (MIT) in the area of bionanofabrication with Professor Karl Berggren in the Research Lab for Electronics (RLE). Also, he was previously a Postdoc at the MIT Laboratory for Manufacturing and Productivity (LMP), working with Professor John Hart on in situ characterization of carbon nanotube growth. In 2013, he completed his PhD at the University of Michigan in Ann Arbor, where he worked with Professor Hart on studying the population dynamics and the collective mechanochemical factors governing the growth and self-organization of filamentary nanostructures. He holds a Bachelor’s degree (honors) in Mechanical Design and Production Engineering (2006) and a Master’s degree in Mechanical Engineering (2009), both from Cairo University. Dr. Bedewy recently received the Outstanding Young Manufacturing Engineer Award from the Society of Manufacturing Engineers (SME) in 2018, the Ralph E. Powe Junior Faculty Enhancement Award from the Oak Ridge Associated Universities (ORAU) in 2017, the Robert A. Meyer Award from the American Carbon Society in 2016, the Richard and Eleanor Towner Prize for Distinguished Academic Achievement from the University of Michigan in 2014, and the Silver Award from the Materials Research Society (MRS) in 2013. His research interests include advanced manufacturing, nanoscale fabrication, metrology and materials characterization, chemical vapor deposition, carbon nanotubes, hierarchical nanostructure self-assembly, and biomolecular engineering.
Raúl Hernández Sánchez was born in Chihuahua, México. He received a B.Sc. in Chemistry from the Department of Chemistry at ITESM Campus Monterrey in 2005 working under the direction of Prof. Jesús Angel Valencia. He then moved to Cambridge, Massachusetts to pursue a Ph.D. in Chemistry at Harvard under the mentorship of Prof. Ted Betley. After completing his thesis, he then moved to Columbia University as a Columbia Nano Initiative Postdoctoral Fellow to work under the supervision of Prof. Colin Nuckolls. At the University of Pittsburgh, his group's research interests lie at the interface between inorganic and materials chemistry.