Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Kristen L Steffens

My current research focuses on the characterization of surfaces using x-ray photoelectron spectroscopy (XPS). Most recently, I have been involved in two projects involving the biofunctionalization of various surfaces for selective protein binding. In addition, I have looked at adhesion behavior of a therapeutic monoclonal antibody to various bio-relevant surfaces. I have also been a part of many other projects, performing XPS to characterize a variety of samples, including Si and C nanowires, isotopically-enriched Si, and atomic layer deposited H3N4 and TiN films. Prior to my surface study work, I used planar laser induced fluorescence (PLIF) and optical emission techniques to investigate the gas-phase chemistry behavior in fluorocarbon plasmas used in semiconductor oxide etching. I also serve as the caretaker of the multi-user XPS instrument and am the laser safety representative for my division. 

 

Selected Publications:

  • Vaish, A; Silin, V; Walker, ML; Steffens, KL; Krueger, S; Yeliseev, AA; Gawrisch, K; Vanderah, DJ, "A generalized strategy for immobilizing uniformly oriented membrane proteins at solid interfaces," Chemical Communications 49 (26), 2013 pp.2685-2687.
  • Williams, EH; Schreifels, JA; Rao, MV; Davydov, AV; Oleshko, VP; Lin, NJ; Steffens, KL; Krylyuk, S; Bertness, KA; Manocchi, AK; Koshka, Y, "Selective streptavidin bioconjugation on silicon and silicon carbide nanowires for biosensor applications," J. Materials Research 28 (1) 2013 pp. 68-77.
  • Williams, EH; Davydov, AV; Motayed, A; Sundaresan, SG; Bocchini, P; Richter, LJ; Stan, G; Steffens, K; Zangmeister, R; Schreifels, JA; Rao, MV, "Immobilization of streptavidin on 4H-SiC for biosensor development," Applied Surface Science 258 (16) 2012 pp. 6056-6063. 

Publications

UV-assisted NO2 sensing at room temperature using rf-sputtered TiO2 thin film

Author(s)
Ting Xie, Nichole Sullivan, Kristen L. Steffens, Baomei Wen, Guannan Liu, Ratan K. Debnath, Albert Davydov, Romel D. Gomez, Abhishek Motayed
A TiO2 thin film based NO2 sensor that operates at room temperature under ultraviolet (UV) illumination was fabricated via radio frequency (rf) sputtering. The

MECHANISMS OF CRITICALITY IN ENVIRONMENTAL ADHESION LOSS

Author(s)
Christopher C. White, Kar T. Tan, Donald L. Hunston, Kristen L. Steffens, Deborah S. Jacobs, Bulent Akgun, Vogt D. Bryan
Moisture attack on adhesive joints is a long-standing scientific and engineering problem. A particularly interesting observation is that when the moisture level
Created September 10, 2019