szulczewski
  • 1088D Shelby Hall
  • (205) 348-0610
  • (205) 348-9104
Gregory Szulczewski
Associate Professor
Education: Undergraduate Degree

B.S., 1989, University of Michigan

Education: Doctoral Degree

Ph.D., 1995, Wayne State University

Education: Other

Postdoctoral Associate, 1995-1997, University of Texas

Research Interests

Energy, charge and spin transport across molecular interfaces

Research in our group is focused on the growth, modification and characterization of surfaces and interfaces for applications in energy conversion, photocatalysis, chemical sensors and molecular spintronics. Students in my group us a variety of surface analysis techniques including scanning probe microscopy, electron microscopy and photoelectron spectroscopy and perform electrical transport measurements. Below is a description of some of the current projects in the group.

Molecular electronics and spintronics Organic semiconductors can absorb/emit light and transport charge. As a result, a multitude of functional devices, e.g. solar cells, transistors, and light-emitting displays can be fabricated. To expand on the versatility of molecular materials, there has been an effort to manipulate the spin degree of freedom of the electrical carriers. Our goal is to measure spin-dependent transport properties in organic semiconductors to better understand the fundament mechanisms that govern spin-relaxation mechanisms.

Nanomaterials  Nanomaterials offer many unique advantages in the design of chemical sensors and energy conversion devices, principally due to the large surface area-to-volume ratio. We have several projects involving the synthesis of semiconducting nanostructures for applications in thermoelectrics, photocatalysis and chemical sensors.

Representative Publications

E. Ellingsworth, B. Turner, and G. Szulczewski, “Thermal conversion of [Fe(phen)3](SCN)2 thin films into the spin crossover complex Fe(phen)2(NCS)2RSC Advances  3 (2013) 3745-3754.

G. Szulczewski, “Spin-polarized tunneling and magnetoresistance in molecular junctions” Current Topics Chemistry 312 (2012) 275-302.

A. J. Drew, G. Szulczewski, L. Nuccio, and W. P, Gillin, The role of interfaces in organic spin valves revealed through spectroscopic and transport measurements”, Phys. Status Solidi B 249 (2012) 9-17.

Z. He, J. Chen, Z. Sun, G. Szulczewski, and D. Li, “Air-flow navigated crystal growth for TIPS pentacene-based organic thin-film transistors” Organic Electronics 13 (2012) 1819-1826.

G. Szulczewski, J. Brauer, E. Ellingsworth, J. Kreil, H. Ambaye, and V. Lauter, “Electronic and structural characterization of LiF tunnel barriers in organic spin-valve structures” J. Appl. Phys. 109 (2011) 07C509.

M. Venkatesan, H. Tokuch, F. Burke, G. Szulczewski, J. M. D. Coey, “Magnetic properties of Alq3/Co interfaces” J. Appl. Phys. 109 (2011) 07C507.

W. Xu, J. Brauer, G. Szulczewski, S. Driver, and A. Caruso, “Chemical, magnetic, and physical structure of cobalt deposited onto aluminium tris(quinolate)” App. Phys. Lett. 94 (2009) 233302.

G. Szulczewski, S. Sanvito, and J. M. D. Coey, “A spin of their own”, Nature Materials 8 (2009) 693.

G. Szulczewski, H. Tokuch, K. Ozug, and J. M. D. Coey, “Magnetoresistance in magnetic tunnel junctions with an organic barrier and a MgO spin filter” Appl. Phys. Lett. 95 (2009) 202506.

W. Xu, G. J. Szulczewski, P. LeClair, I. Navarrete, R. Schad, G. Miao, H. Guo, and A. Gupta “Tunneling magnetoresistance observed in La0.67Sr0.33MnO3/organic molecule/Co junctions” Appl. Phys. Lett. 90 (2007) 072506.