in this study, the nonlinear optical properties and optical limiting performance of the silver nanoparticles (agnps) in distilled water are investigated. the nonlinear absorption coefficient of the colloid is measured by the z-scan technique. the optical limiting behavior of the agnp suspension is investigated under exposure to nanosecond laser pulses at 532 nm. the results show that nonlinear ...

the corrosion protection of mild steel by a newly developed epoxy-based coating system containing inherently conducting nanopolyaniline-clay as a nanoadditive has been studied. polyaniline-clay anticorrosion nanoadditive (pcna) was obtained by the direct mixing method of nanopolyaniline (0.03 wt.%) and organo-modified clay (3 wt.%) at atmospheric pressure, and xrd technique was used to study d-...

Changes in the size of the aptamer-conjugated AuNPs upon binding to the viruses were observed by dynamic light scattering (DLS). Changes in the size of scattering particles using DLS when the AuNP.virus complexes are formed has previously been reported by Driskell et al. using antibodies conjugated to 30, 60, 80nm AuNPs.[1] For a direct comparison with their work we used AuNPs of similar diamet...

In this paper, Cu-Ti nanocomposite synthesized via ball milling of copper-titanium powders in 1, 3, and 6 of weight percentage compounds. The vial speed was 350 rpm and ball to powder weight ratio kept at 15:1 under Argon atmosphere, and the time of milling was 90 h. Obtained powders were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), and dynamic light scattering (DLS)....

Multiphase microscale emulsions are a material platform that can be tuned and dynamically configured by variety of chemical physical phenomena, rendering them inexpensive broadly programmable optical transducers. Interface engineering underpins many these sensing schemes but typically focuses on manipulating single interface, while the multiphase junctions complex remains underexplored. Herein,...

We show a novel technique to distinguish between Doppler shifted and unshifted light in multiple scattering experiments on mixed static and dynamic media. With a phase modulated low coherence Mach- Zehnder interferometer, optical path lengths of shifted and unshifted light and path length dependent Doppler broadening are measured in a two-layer tissue phantom, with a superficial static layer of...

Using an improved static and dynamic light-scattering technique, we have observed multiscale relaxation of the pretransitional fluctuations in the isotropic phase of a cromolyn aqueous solution, a lyotropic liquid crystal where rods are formed by aggregates of disklike molecules. We have detected the onset of cromolyn aggregation about 12 degrees C above the transition temperature. The onset is...

Iron oxide (Fe3O4) nanoparticles with average sizes of 10 nm were synthesized by a chemical coprecipitation method in the presence of chitosan. Chitosan as a natural polymer which can be extracted from crustaceans was used in the synthesis process in order to achieve more dispersed nanoparticles. Also, chitosan was used to obtain functionalized magnetic nanoparticles for using in different area...

A novel quaternary ammonium-based cationic gemini surfactant (S6) having 1,6 di-bromo hexane as a spacer, have been used and its interaction with insulin in aqueous solution (pH, 7.40) was investigated by several methods including fluorescence spectroscopy, UV-Vis spectroscopy, circular dichroism, dynamic light scattering, ζ-potential measurements, conductivity and transmission electron microsc...