Directory

Gregory Szulczewski

Gregory Szulczewski

Associate Professor

Education

  • Postdoctoral Associate, University of Texas, 1995-1997
  • PhD, Wayne State University, 1995
  • BS, University of Michigan, 1989

Bio

Research Interests

Chemical sensors

We are using thin films of metal-organic frameworks (MOF’s) to detect several classes of volatile organic compounds. Specifically, we use solution and vapor deposition techniques to grow thin films on piezoelectric substrates. We measure the kinetic and thermodynamic properties of adsorption and desorption to understand the structure-property relationships which will guide how MOFs can be used in gas separations, storage, and sensing.

Molecular spintronics

Organic semiconductors can absorb light, emit light and transport charge and spin. 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 main goal is to measure spin-dependent transport properties in organic semiconductors to better understand the fundament mechanisms that govern spin-relaxation mechanisms.

Thermoelectric materials

Thermoelectric materials convert heat into electrical power. Our main goal is to develop thin-film based materials that can be used in low-power applications, such as wearable, flexible electronics. Toward this end we synthesis, characterize and fabricate nanocomposites using conducting polymers and inorganic semiconductor nanowires.

Selected Publications

K. Anderson and G. Szulczewski, “”Polymeric nanocomposities of Te and Bi2Te3 nanowires in PEDOT:PSS: Synthesis and electrical transport studies” in Polymer Composites for Energy Harvesting, Conversion, and Storage, Chapter 7, 2014. P. 147-163, ACS Symposium Series, Volume 1161.

S. MK. Anderson, L. Guo, A. Yousuf, E. Ellingsworth, C. Vajner, H.-T. Wang, and G. Szulczewski, “Temperature dependent thermopower and electrical conductivity of Te nanowire/PEDOT:PSS microribbons” App. Phys. Lett. 105 (2014) 073905. 

L. Guo, A. Aglan, H. Quan, J. Sun, C. Tang, G. Szulczewski, and H.-T. Wang, “Selective adsorption of bismuth telluride nanoplatelets through electrostatic attractions” Phys. Chem. Chem. Phys. 16 (2014) 11297-11302.

E. Ellingsworth, B. Turner, and G. Szulczewski, “Thermal conversion of [Fe(phen)3](SCN)2thin films into the spin crossover complex Fe(phen)2(NCS)2” RSC 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 B249 (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.

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