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We present a micropatterning method for the automatic transfer and arbitrary positioning of computer-generated three-dimensional structures within a substrate. The Gerchberg-Saxton algorithm and an electrically addressed spatial light modulator (SLM) are used to create and display phase holograms, respectively. A holographic approach to light manipulation… (More)
We present a quantitative phase microscopy method that uses a Bayer mosaic color camera to simultaneously acquire off-axis interferograms in transmission mode at two distinct wavelengths. Wrapped phase information is processed using a two-wavelength algorithm to extend the range of the optical path delay measurements that can be detected using a single… (More)
We demonstrate a diffractive maskless lithographic system that is capable of rapidly performing both serial and single-shot micropatterning. Utilizing the diffractive properties of phase holograms displayed on a spatial light modulator, arbitrary intensity distributions were produced to form two and three dimensional micropatterns/structures in a variety of… (More)
Janus particles generally refer to a class of colloids with two dissimilar faces having unique material properties.  The spherical asymmetry associated with Janus particles is the key to realizing many commercial applications, including electro-phoretic displays, [2,3] nanosviscometers,  and self-propelling micromachines.  These diverse… (More)
i Spreader fan distributing a mixture of biosolids and fly ash on the Palmerton, PA Site NOTICE This document was prepared by a University of Arizona undergraduate student under an internship with United States Environmental Protection Agency. This report was not subject to EPA peer review or technical review. The U.S.
a r t i c l e i n f o Electrospun polycaprolactone nanofibers were selectively ablated to form microstructures via the phase modulation of femtosecond laser beams. Ablation width (1–15 μm) and depth (15–110 μm) resolution were dependent upon the selection of pulse energy and microscope objective. Because phase modulation shapes light in a maskless fashion,… (More)
a r t i c l e i n f o The in-situ synthesis of Cu/ZnO crystalline nanofibers is presented. The composite nanofibers are formed through the calcination and reduction of as-electrospun fibers consisting of poly(vinyl pyrrolidone) as well as Cu and ZnO precursors. The crystal structure and morphology of the synthesized fibers were characterized using X-ray… (More)