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1. 3D Imaging of Diatoms with Ion-abrasion Scanning Electron Microscopy
Keana C K Scott, Mark Hildebrand, Sang Kim, Dan Shi, Sriram Subramaniam
Ion-abrasion scanning electron microscopy (IASEM) takes advantage of focused ion beams to abrade thin sections from the surface of bulk specimens, coupled with SEM to image the surface of each section, enabling 3D reconstructions of subcellular archi ...
2. 3D elemental and structural analysis of biological specimens using electrons and ions
Keana C K Scott
We demonstrate the utility of focused ion beam scanning electron microscopy (FIB SEM) combined with energy dispersive x-ray spectrometry (EDS) for 3-dimensional (3D) morphological and elemental correlative analysis of sub-cellular features. Althoug ...
3. Analysis of 3D elemental mapping artifacts in biological specimens using Monte Carlo simulation
Keana C K Scott, Nicholas W m Ritchie
In this paper, we present the Monte Carlo simulation results demonstrating the feasibility of the focused ion beam based X-ray microanalysis technique (FIB-EDS) for the 3D elemental analysis of biological samples. We used a marine diatom Thalassiosi ...
4. Challenges, Strategies and Opportunities for Measuring Carbon Nanotubes within a Polymer
Composites by X-ray Photoelectron Spectroscopy
Special Publication (NIST SP)
Justin M Gorham, Jeremiah W Woodcock, Keana C K Scott
This NIST Special Publication (SP) is one in a series of NIST SPs that address research needs
articulated in the National Nanotechnology Initiative (NNI) Environmental, Health, and Safety
Research Strategy published in 2011 . This ...
5. Characterization of SiGe Films for use as a National Institute of Standards and Technology (NIST) Microanalysis Reference material (RM 8905)
Ryna B. Marinenko, Shirley Turner, David S Simons, Savelas A Rabb, Rolf Louis Zeisler, Lee Lijian Yu, Dale E Newbury, Rick L Paul, Nicholas W m Ritchie, Stefan D Leigh, Michael R Winchester, Lee J Richter, Douglas C Meier, Keana C K Scott, D Klinedinst, John A Small
Bulk SiGe wafers cut from single-crystal boules and two SiGe thick films (4 m and 5 m thick) on Si wafers were evaluated with the electron probe microanalyzer for the extent of heterogeneity and composition for use as reference materi ...
6. Detecting Carbon in Carbon: Application of Differential Charging to Obtain Information on the Chemical Identity and Spatial Location of Carbon Nanotube Aggregates in Composites by Imaging X-ray Photoelectron Spectroscopy
Justin M Gorham, William A Osborn, Jeremiah W Woodcock, Keana C K Scott, John Michael Heddleston, Angela R Hight Walker, Jeffrey W Gilman
The surface contributions and dispersion properties of multiwalled carbon nanotubes (MWCNT) within a composite are important measurements to perform on nano-enabled products in order to help answer environmental health and safety questions associated ...
7. Detection and Speciation of Brominated Flame Retardants in Consumer Products and Household Dust
Richard D Holbrook, Jeffrey M. Davis, Keana C K Scott, Christopher W Szakal
The ubiquitous presence of brominated flame retardants in humans, biota, and the environment has caused concerns about their toxicity, transformations, and persistence. Polymeric materials, which often are intercalated with include brominated flame ...
8. Effects of nanoparticle size and charge on interactions with self-assembled collagen
Dongbo Wang, Jing (Jing) Ye, Steven D Hudson, Keana C K Scott, Sheng Lin-Gibson
Recent insights into bone formation have suggested that the critical first step to the biomineralization process is the integration of small (nanometer dimension) mineral clusters into collagen fibers. Such behavior is of intrinsic interest for the a ...
9. Impact of UV Irradiation on the Surface Chemistry and Structure of Multiwall Carbon Nanotube Epoxy Nanocomposites
Elijah J Petersen, Thomas F. Lam, Justin M Gorham, Keana C K Scott, Christian J Long, Deborah L Stanley, Renu Sharma, James Alexander Liddle, Tinh Nguyen
One of the most promising applications of nanomaterials is as nanofillers to enhance the properties of polymeric materials. However, the effect of nanofillers on polymers subject to typical environmental stresses, such as ultraviolet (UV) radiation, ...
10. Live, video-rate super-resolution microscopy using structured illumination and rapid GPU-based parallel processing
Jonathan A. Lefman, Keana C K Scott, Javed Khan, Stephan J Stranick
Structured illumination fluorescence microscopy is a powerful super resolution method that is capable of achieving a resolution below 100 nm. Each super-resolution image is computationally constructed from a set of differentially illuminated images. ...