Radiation Effects in Carbon Nanomaterials and Devices

February 4, 2013
11:00am-12:00pm
Interschool Lab, 750 CEPSR
Hosted by: Profs. R. Osgood and J. Kymissis
Speaker: Dr. Cory D. Cress (Electronics Science and Technology Division, US Naval Research Laboratory)

Abstract

Recent advances in chirality separation techniques of single walled carbon nanotubes (SWCNTs) and the large-area CVD growth of graphene provide a feasible transition path for these carbon-based nanomaterials (CN) from novel laboratory curiosities to a viable alternative class of materials for use in information processing and sensing devices. The remarkable electrical, optical, and structural properties of CN are well documented and are rooted in their single atomic-layer thinness and quantum confined electronic bandstructure. However, the unique structure of CN leaves them highly sensitive to intrinsic disorder (e.g., lattice defects [1]) and extrinsic disorder (e.g., Coulomb Scatterers [2]) stemming from radiation exposure. Studying the radiation response of CN is an effective tool for understanding the fundamental properties of CN and is necessary to ensure the survivability of future carbon nanoelectronic devices employed in the harsh radiation environments of space. In this seminar, I will introduce the techniques used to simulate the space environment, summarize the methodology used to quantify the total radiation exposure, and summarize our recent results regarding radiation-induced intrinsic and extrinsic disorder in CN.

References

[1] J. E. Rossi, C. D. Cress, et al., J. Appl. Phys., vol. 112, no. 3, p. 034314, 2012.
[2] C. D. Cress, et al., IEEE Trans. Nucl. Sci., vol. 59, no. 6, pp. 3045–3053, Dec. 2012.

Speaker Biography

Dr. Cory D. Cress received his Ph.D. in Microsystems Engineering from the Rochester Institute of Technology (RIT) in 2008, and is currently a Materials Research Engineer at the Naval Research Laboratory (NRL). His doctoral research consisted of investigating the effects of ionizing radiation on nanomaterials and III-V devices, and the development of radioisotope batteries. He has co-authored 35 peer-reviewed journal publications in the field of radiation effects and nanotechnology. Notable recognitions include a NRL Karles Fellowship (2009), a National Research Council (NRC) Postdoctoral Research Associateship (2008), and a NASA Graduate Student Research Fellowship (2006). Dr. Cress currently has 4 patents pending, two pertaining to carbon nanostructures, and two related to neutron sensing.


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