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Wisconsin Rapids, WI, United States

Saydjari A.,Lincoln High School | Pietron J.J.,U.S. Navy | Simpkins B.S.,U.S. Navy
Electroanalysis | Year: 2015

Bromophenol blue (BPB) was electropolymerized onto a Au substrate. The effects of voltammetric cycle number, BPB concentration, and pH on film thickness, density, optical absorption, and electrochemical susceptibility were evaluated, and favorable deposition conditions were identified. Quantitative measurement of the film mass via quartz crystal microbalance enabled determination of the molar volume and revealed a strong dependence of film density with deposition pH. Finally, electrochemical control of the optical properties of BPB films was demonstrated via in situ spectroelectrochemistry. We believe this is the first demonstration of electropolymerization of pure BPB on Au, and thus the first demonstration of poly(BPB) as an electrochemically switchable optical coating. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Guieu S.,Spitzer Science Center Caltech | Guieu S.,European Southern Observatory | Rebull L.M.,Spitzer Science Center Caltech | Stauffer J.R.,Spitzer Science Center Caltech | And 14 more authors.
Astrophysical Journal | Year: 2010

IC 2118, also known as the Witch Head Nebula, is a wispy, roughly cometary, ∼5 degree long reflection nebula, and is thought to be a site of triggered star formation. In order to search for new young stellar objects (YSOs), we have observed this region in seven mid-and far-infrared bands using the Spitzer Space Telescope and in four bands in the optical using the U. S. Naval Observatory 40 inch telescope. We find infrared excesses in four of the six previously known T Tauri stars in our combined infrared maps, and we find six entirely new candidate YSOs, one of which may be an edge-on disk. Most of the YSOs seen in the infrared are Class II objects, and they are all in the "head" of the nebula, within the most massive molecular cloud of the region. © 2010. The American Astronomical Society. All rights reserved.

Saydjari A.,Lincoln High School | Long J.P.,U.S. Navy | Dressick W.J.,Center for Bio Molecular science Code 6900 | Simpkins B.S.,U.S. Navy
Chemical Physics Letters | Year: 2014

Polyelectrolyte multilayer films were fabricated via layer-by-layer deposition using polyallylamine hydrochloride lightly functionalized (∼1%) with a covalently bound polypyridyl Ru(II) chromophore dye (RuPAH) and polystyrenesulfonate (PSS). Absorbance oscillations were noted in the UV-visible spectra of these films as functions of the number of PSS/RuPAH bilayers and identified as optical interference effects. The interference effects were modeled according to a Fabry-Pérot cavity and a powerful conversion methodology was developed capable of correcting many spectra from relatively few fits. It is recommended that this method be applied as a standard to enable accurate analysis of absorbance spectra in thin films containing chromophores.

Rosen R.,West Virginia University | Swiggum J.,West Virginia University | McLaughlin M.A.,West Virginia University | Lorimer D.R.,West Virginia University | And 67 more authors.
Astrophysical Journal | Year: 2013

We present the discovery and timing solutions of five new pulsars by students involved in the Pulsar Search Collaboratory, a NSF-funded joint program between the National Radio Astronomy Observatory and West Virginia University designed to excite and engage high-school students in Science, Technology, Engineering, and Mathematics (STEM) and related fields. We encourage students to pursue STEM fields by apprenticing them within a professional scientific community doing cutting edge research, specifically by teaching them to search for pulsars. The students are analyzing 300 hr of drift-scan survey data taken with the Green Bank Telescope at 350 MHz. These data cover 2876 deg2 of the sky. Over the course of five years, more than 700 students have inspected diagnostic plots through a web-based graphical interface designed for this project. The five pulsars discovered in the data have spin periods ranging from 3.1 ms to 4.8 s. Among the new discoveries are PSR J1926-1314, a long period, nulling pulsar; PSR J1821+0155, an isolated, partially recycled 33 ms pulsar; and PSR J1400-1438, a millisecond pulsar in a 9.5 day orbit whose companion is likely a white dwarf star. © 2013. The American Astronomical Society. All rights reserved.

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