Materials Literature
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A technique for generation of a structurally stable hyperbolic beam using Fourier transform holography is reported. Bessel function with their arguments having hyperbolic locus is used for generating a diffractive optical element (DOE). For the introduction of optical vortex a circular vortex term is used. However, it…
Functionalized single-walled carbon nanotubes (SWNTs) with amino groups were prepared by oxidation, acylation, and amidation of SWNT surfaces. Epoxy/SWNT composite membranes were fabricated using a very low content of amino-grafted SWNTs (≤0.08wt%) as fillers. SWNTs with amino groups acted as a curing agent, covalentl…
The aim of this work was to develop a methodology for the characterization of complex piezocomposites under external mechanical forces. In this specific procedure the samples were axially loaded in a universal mechanical test machine and monitored with an electrometer. The force versus displacement and the generated c…
Ag1-xCuxI (x= 0.10, 0.20, and 0.50) thin films with thicknesses upto15 nm produced by thermal co-evaporation onto glass substrates were systematically iodized and carefully characterized. Optical absorption spectra of uniodized Ag-Cu films show intense surface plasmon resonance (SPR) features with maxima at 430, 445 a…
Informatics-based identification of candidate semiconducting radiation detection materials depends upon the development of a robust knowledge base of materials properties. However, the accuracy and integrity of the knowledge base are often affected by information loss due to incomplete entry and loss of context. We de…
Shape dependent sensitivity of localized surface plasmon based biosensing was investigated by combining single particle protein sensing and multiple multipole program simulation. Significantly higher sensitivity was observed for tetrahedral particles than spherical ones, which was revealed by careful structural analys…
A 4 mm diameter zone plate was calibrated in the 7 nm to 18.5 nm wavelength range using synchrotron radiation. The efficiency in the focused 1st order was measured using the scanning monochromator at the Naval Research Laboratory beamline X24C at the National Synchrotron Light Source. The measured efficiencies were co…
Amorphous copolymers were synthesized with azobenzene methacrylate, cyanobiphenyl methacrylate, and alkyl methacrylate, in which the azobenzene acts as a photoresponsive part to undergo photoisomerization, the cyanobiphenyl is involved in a change in refractive index triggered by the photoisomerization of the azobenze…
The emission properties of polymer light-emitting diode (PLEDs), using blue emissive poly(9,9-dioctylfluorene) (PFO) and yellow-green emissive poly[9,9-dioctylfluorenyl-2,7-diyl)-co-1, 4-benzo-{2,1'-3}- thiadiazole)] (F8BT) fabricated by the spin-coating method, the toluene vapor method and the thermal printing method…
Abstract We have demonstrated that it is possible to reversibly photo‐control the room temperature magnetism in a diluted magnetic semiconductor based on zinc oxide nanoparticles coated with azobenzene‐derivatized thiols (Azo‐ZnO NPs). These photochromic ligands provide a photo‐function and at the same time act as a t…
Light- and temperature-driven multistable chiral materials composed of a binaphthyl moiety as a twisting part and an azobenzene moiety as a photoresponsive part in a single component were investigated. It has been found that the materials show reversible change in a dihedral angle of the twisting part at various tempe…
SiO x films have several advantages as an interlayer dielectric in electronic devices owing to the strong adhesion between SiO x and the substrate. In this study, the coating performance as a function of the N 2 O flow rate was evaluated by electrochemical impedance spectroscopy and potentiodynamic polarization tests…
Solid-state dye-doped polymeric distributed-feedback lasers in near-infrared wavelength region were fabricated by photo nanoimprint lithography. Fluorinated-polyimide material which shows low propagation loss in the near infrared was used as the host matrix of the active waveguide doped with near-infrared organic dye,…
Organic light emitting devices (OLEDs) are projected to provide a low-cost, long-lived, and efficient wide area lighting solution if challenges in reliability, cost, and efficiency can be overcome. Development of new transparent conducting oxides (TCOs) that do not contain indium for use as the anode in bottom-emittin…
We demonstrate photovoltaic integrated circuits (PVIC) with high-quality large-grain Copper Indium Gallium Selenide (CIGS) obtained with the unique combination of low-cost ink-based or Physical Vapor Deposition (PVD) based nanoengineered precursor thin films and a reactive transfer printing method. Reactive transfer i…
Metal nanoparticle assemblies of well-defined structure are investigated as substrates for quantitative surface enhanced Raman scattering (SERS). The ~100 nm structures are formed from oligonucleotide-functionalized gold core and satellite particles. Raman scattering from Cy5 incorporated on the core particles is dete…
Optical limiters are nonlinear optical devices that limit the amount of power or energy transmitted. They function through either optically-induced nonlinear absorption or refraction or a combination of the two. At low incident optical power or pulse energy, the transmission of the system is high enough to allow nomin…
We have investigated the performance, structure and stability of periodic multilayer films containing silicon carbide (SiC) and aluminum (Al) layers designed for use as reflective coatings in the extreme ultraviolet (EUV). We find that SiC/Al multilayers prepared by magnetron sputtering have low stress, good temporal…
Kinetics of Chemical Changes in Phenol Formaldehyde Based Polymeric Films Etched in N2O and O2 Inductively Coupled Plasmas: A Comparative Study, Kwon, Kwang-Ho, Min, Nam-Ki, Kang, Seung-Youl, Baek, Kyu-Ha, Suh, Kyung Soo, Shutov, Dmitriy Alexandrovich
The effects of phosphorus implantation on the activation of magnesium doped in GaN at different dopant concentration ratios have been systematically investigated. Hall effect measurements show that P implantation improves the hole concentration, and that this improvement is dependent on P/Mg dopant concentration ratio…