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1. Method for Measuring the Volume of Nominally 100 um Diameter Spherical Water-in-Oil Emulsion
Journal of Research (NIST JRES)
John A Dagata, Natalia Farkas, John A Kramar
This report describes an equivalent volume measurement method using optical microscopy for
estimating the mean volume of nominally 100 um diameter spherical droplets. The droplets
are the aqueous phase of proprietary water in oil emulsions used i ...
2. Method for measuring the diameter of polystyrene latex reference spheres by atomic force
Special Publication (NIST SP)
John A Dagata, Premsagar Purushotham Kavuri, Andras Vladar, Kensei Ehara, Natalia Farkas, Chung-Lin Wu, Hiroshi Itoh
This report presents a correlated height and width measurement model for particle size analysis
of spherical particles by atomic force microscopy (AFM). It is complementary to more familiar
methods based on a single value of the particle height o ...
3. Development of the Metrology and Imaging of Cellulose Nanocrystals
Michael T Postek, Andras Vladar, John A Dagata, Natalia Farkas, Bin Ming, Ryan Wagner, Arvind Raman, Robert J Moon, Ronald Sabo, Theodore H Wegner, James Beecher
The development of metrology for nanoparticles is a significant challenge. Cellulose nanocrystals
(CNC) are one group of nanoparticles that have high potential economic value
but present substantial challenges to the development of the measurement ...
4. High-voltage Nanoimprint Lithography of Refractory Metal Film
John A Dagata, Natalia Farkas, R Ramsier
Local oxidation of metal, semiconductor, and polymer surfaces has provided a common basis from which to explore fundamental principles of nanolithography and prototype functional nanostructures for many years now. This article summarizes an investiga ...
5. Cellulose Nanocrystals the Next Big Nano-thing?
Michael T Postek, Andras Vladar, John A Dagata, Natalia Farkas, Bin Ming, Ronald Sabo, Theodore H Wegner
Biomass surrounds us from the smallest alga to the largest redwood tree. Even the largest trees owe their strength to a newly-appreciated class of nanomaterials known as cellulose nanocrystals (CNC). Cellulose, the world s most abundant natural, rene ...
6. Physical characterization methods for iron-oxide contrast agents encapsulated within a targeted liposome-based delivery system
John A Dagata, Natalia Farkas, Cindi L Dennis, Robert D Shull, Vincent A Hackley, Charles W Yang, Kathleen F Pirollo, Esther H Chang
Intact liposome-based targeted nanoparticle delivery systems (NDS) are immobilized by nonselective binding and characterized by scanning probe microscopy (SPM) in a fluid imaging environment. The size, size distribution, functionality, and stability ...
7. Nanoscale Oxidation of Zirconium Surfaces: Kinetics and Mechanisms
Natalia Farkas, Li Zhang, E A Evans, R Ramsier, John A Dagata
We show that AFM-induced oxide features can be reproducibly formed on both Zr and ZrN surfaces, and that the growth rate decreases rapidly with increasing time. There is an increase in oxide-feature height with humidity for both systems, and an appro ...