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Author: Jason Killgore

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1. Liquid Contact Resonance Atomic Force Microscopy Via Experimental Reconstruction of the Hydrodynamic Function
Published: 6/11/2014
Authors: Ryan C Tung, Jason Philip Killgore, Donna C. Hurley
Abstract: We present an experimental method, based on analytical hydrodynamic theory, to accurately predict the inertial and viscous fluid loading forces at arbitrary frequencies in a contact resonance atomic force microscope system. Knowledge of the flui ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915745

2. Engineering Plant Cell Walls: Tuning Lignin Monomer Composition for Deconstructable Biofuels Feedstocks or Resilient Biomaterials
Published: 2/27/2014
Authors: Peter Ciesielski, Michael Resch, Barron Hewetson, Jason Philip Killgore, Alexandra E Curtin, Nick Anderson, Ann Chiaramonti Chiaramonti Debay, Donna C. Hurley, Aric Warner Sanders, Michael Himmel, Clint Chapple, Nathan Mosier, Bryon Donohoe
Abstract: Advances in genetic manipulation of the biopolymers that compose plant cell walls will facilitate more efficient production of biofuels and chemicals from biomass and lead to specialized biomaterials with tailored properties. Here we investigate ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914543

3. SPRITE: A modernized approach to scanning probe contact resonance imaging
Published: 1/20/2014
Authors: Anthony B Kos, Jason Philip Killgore, Donna C. Hurley
Abstract: We describe a system for contact resonance tracking called Scanning Probe Resonance Image Tracking Electronics (SPRITE). SPRITE can image two contact resonance frequencies simultaneously and thus can be used to acquire quantitative mechanical prope ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914785

4. Dynamic contact AFM methods for nanomechanical properties
Published: 12/1/2013
Authors: Donna C. Hurley, Jason Philip Killgore
Abstract: This chapter focuses on two atomic force microscopy (AFM) methods for nanomechanical characterization: force modulation microscopy (FMM) and contact resonance (CR) techniques. FMM and CR methods share several common features that distinguish them fro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911068

5. Measurement of viscoelastic loss tangent with contact resonance modes of atomic force microscopy
Published: 11/26/2013
Authors: Donna C. Hurley, Sara E. Campbell, Jason Philip Killgore, Lewis M Cox, Yifu Ding
Abstract: We show how atomic force microscopy techniques based on contact resonance (CR) can be used to measure the viscoelastic loss tangent tan δ of polymeric materials. Absolute values of tan δ do not involve intermediate calculation of loss modul ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914560

6. Morphing Metal-Polymer Janus Particles
Published: 10/25/2013
Authors: Lewis M Cox, Jason Philip Killgore, Zhengwei Li, Zheng Zhang, Donna C. Hurley, Jianliang Xiao, Yifu Ding
Abstract: Shape memory polymers have the unique ability to memorize and recover their permanent shapes after being programmed to hold high strain levels up to a few hundred percent. While studies have traditionally focused on utilizing shape memory effects ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914380

7. Hydrodynamic Corrections to Contact Resonance Force Microscopy Measurements of Viscoelastic Loss Tangent
Published: 7/9/2013
Authors: Ryan C Tung, Jason Philip Killgore, Donna C. Hurley
Abstract: We present a method to improve accuracy in measurements of nanoscale viscoelastic material properties with contact resonance (CR) AFM methods. Through the use of the two-dimensional hydrodynamic function, we obtain a more precise estimate of the flu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913520

8. Anomalous Friction in Suspended Graphene
Published: 9/20/2012
Authors: Alexander Y. Smolyanitsky, Jason Philip Killgore
Abstract: Since the discovery of the Amonton's law and with support of modern tribological models, friction between surfaces of three-dimensional materials is known to generally increase when the surfaces are in closer contact. Here, using molecular dynamics s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910882

9. Quantitative Viscoelastic Mapping of Polyolefin Blends with Contact Resonance Atomic Force Microscopy
Published: 5/9/2012
Authors: Dalia Yablon, Anil Gannepalli, Roger Proksch, Jason Philip Killgore, Donna C. Hurley, Andy Tsou
Abstract: The storage modulus (E') and loss modulus (E") of polyolefin blends have been mapped on the nanoscale with contact resonance force microscopy (CR-FM), a dynamic contact mode of atomic force microscopy (AFM). CR-FM maps for a blend of polyethylene, po ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909881

10. Relationship between Barrier Layer Tg and TFC Membrane Performance: Effect of Chlorine Treatment
Published: 3/8/2012
Authors: Sajjad H. Maruf, Dae U. Ahn, John Pellegrino, Jason Philip Killgore, Alan R. Greenberg, Yifu Ding
Abstract: Thin film composite (TFC) reverse osmosis (RO) membranes play a significant role in addressing rapidly expanding global needs for potable water. A well-known problem of TFC membranes is their sensitivity to oxidizing agents such as chlorine, whi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910101



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