U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Jason Killgore (Fed)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 51 - 73 of 73

Engineering Plant Cell Walls: Tuning Lignin Monomer Composition for Deconstructable Biofuels Feedstocks or Resilient Biomaterials

February 27, 2014
Author(s)
Peter Ciesielski, Michael Resch, Barron Hewetson, Jason Killgore, Alexandra Curtin, Nick Anderson, Ann Chiaramonti Debay, Donna C. Hurley, Aric Sanders, Michael Himmel, Clint Chapple, Nathan Mosier, Bryon Donohoe
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 several

SPRITE: A modernized approach to scanning probe contact resonance imaging

January 20, 2014
Author(s)
Anthony B. Kos, Jason P. Killgore, Donna C. Hurley
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 properties

Dynamic contact AFM methods for nanomechanical properties

December 1, 2013
Author(s)
Donna C. Hurley, Jason P. Killgore
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 from

Morphing Metal-Polymer Janus Particles

October 25, 2013
Author(s)
Lewis M. Cox, Jason Killgore, Zhengwei Li, Zheng Zhang, Donna C. Hurley, Jianliang Xiao, Yifu Ding
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 for macro

Anomalous Friction in Suspended Graphene

September 20, 2012
Author(s)
Alexander Y. Smolyanitsky, Jason P. Killgore
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

Effect of elastic deformation on frictional properties of few-layer graphene

January 9, 2012
Author(s)
Alexander Y. Smolyanitsky, Jason P. Killgore, Vinod K. Tewary
We describe the results of Brownian dynamics (BD) simulations of an AFM tip scanned on locally suspended few-layer graphene. The effects of surface compliance and sample relaxation are directly related to the observed friction force. We demonstrate that

Viscoelastic Property Mapping with Contact Resonance Force Microscopy

November 4, 2011
Author(s)
Jason P. Killgore, Donna C. Hurley, Dalia Yablon, Joseph Turner, Philip Yuya, Roger Proksch, Anil Gannepalli, Andy Tsou
We demonstrate accurate nanoscale mapping of loss and storage modulus on a polystyrene-polypropylene blend with contact resonance force microscopy (CR-FM). The viscoelastic properties are extracted from spatially resolved maps of the contact resonance

Quantitative Subsurface Contact Resonance Force Microscopy of Model Polymer Nanocomposites

March 16, 2011
Author(s)
Jason P. Killgore, Jennifer Y. Kelly, Christopher M. Stafford, Michael J. Fasolka, Donna C. Hurley
We present experimental results on the use of quantitative contact resonance force microscopy (CR-FM) for mapping the planar location and depth of 50 nm silica nanoparticles buried beneath polystyrene films 30 nm to 165 nm thick. The presence of shallowly