Materials Literature
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The high dispersion found in the literature for the conductivity of Reduced Graphene Oxide (RGO) layers makes it highly desirable to develop fast and non-invasive methods for their characterization. Here we show that Electrostatic Force Microscopy (EFM) is an in situ, fast, and contactless technique to evaluate the co…
As is shown in the literature, surface-enhanced Raman scattering (SERS)-active Ag films obtained by the salting-out of Ag colloids from solutions with some salts, are popularly used to examine the structure of analytes. SERS-active Ag nanoparticles (NPs) demonstrate more significant SERS effects than Au NPs, however,…
A comprehensive analysis of heterogeneous nanostructures based on TiO2 aerogels and Ag nanoparticles (NPs) is reported herein. The experimental techniques engaged along this study enable a multi-scale approach for the characterization of this composite system. The results clearly indicate that an increase of the Ag am…
In this letter, three different negative-index metamaterial designs based on single-particle degenerate dielectric resonators are presented. The resonator designs are realized by introducing high-contrast perturbations to the cavity geometry so as to bring the lowest-order electric and magnetic cavity resonances into…
Pentamerous oligoaniline (POA) was protonated with sulfuric acid to form emeraldine salts (ES) and then intercalated in montmorillonite (MMT) CL120 to develop a functional conductive organo-layered material. The characteristics of the modified clay CL120/ES-POA were analyzed by wide-angle X-ray diffraction (WAXD) to f…
Los hidróxidos dobles laminares (HDLs) son estructuras sintéticas formadas por láminas de hidróxidos metálicos cargadas positivamente que son estabilizadas con aniones interlaminares. La presencia de grupos hidroxilo en las superficies de sus láminas y los aniones intercambiables los hace compuestos ideales para prepa…
Syntheses of 2,3,4,5-tetraphenylcyclopenta-2,4-dienyl benzene derivatives tailored with seven substituents of various lengths and molecular composition were accomplished and their UV-Vis and fluorescence properties investigated. All of the novel fluorescent dyes displayed varying degrees of aggregation-induced emissio…
The ability of a chemiresistor sensor with a polyaniline active layer to detect insect infestation was investigated. The sensor detected various volatile organic compounds produced by plants, emitted as a defense mechanism when attacked by herbivores. This sensor was easy to fabricate and cost only 2 cents per each se…
We report the processing of NaNbO 3 nanopowder by combining the solid‐state synthesis and subsequent milling in the agitator bead mill. The effect of different rotation speeds of the agitator shaft on the comminution process was followed by laser granulometry. The morphology and specific surface area of the powders we…
Multiferroic BaSrTiO3/NdBiFeO3 (BST/BNFO) mulilayers with 3 nm and 6 nm layer thickness demonstrate superlattice structure in the XRD patterns. The break of the spin cycloide and interface strain results in ferromagnetic behavior and enhancement of magnetization. The total thickness of BNFO is varied in the range of 5…
A comparative analysis of electrocaloric and barocaloric efficiency of order-disorder ferroelectrics Rbx(NH4)1-xHSO4 and TGS is performed. A good agreement was found between intensive electrocaloric effects measured experimentally and calculated using electric equation of state. Barocaloric effects were evaluated anal…
This paper presents the application of chiral metamaterial covers for improving the circularly polarized microstrip antenna performance. Semi-planar chiral metamaterial structures with a near zero refractive index are designed and utilized for enhancing the directivity of circularly polarized single and array patch an…
Electrospinning of poly-(vinyl alcohol) (PVA) with soluble eggshell membrane (S-ESM) in aqueous media was carried out under 20%-70% relative humidity (RH). The S-ESM/PVA spinning dope was 11.66wt% solutes concentration with weight ratio of S-ESM:PVA=40:60. Fiber morphology and fiber diameter were determined using fiel…
Fabrication of nanocomposites from immiscible polymer blend system has been represented in this work. A new type of natural clay named Halloysite nanotubes (HNTs) are modified by Polyethyleneimine (PEI) and these PEI grafted HNTs are incorporated into the immiscible blend system during melt mixing process to prepare h…
A novel amphiphilic vinyl copolymer incorporating benzo-18-crown-6 (BC) and crowned spirobenzopyran (cSP) in the side chain [poly(BC-co-cSP)] was synthesized by free radical copolymerization. The spectroscopic measurements made it clear that poly(BC-co-cSP) forms a micelle in water and that its cSP moiety can bind a m…
Seed polymer/silica particles are synthesized by double in situ miniemulsion polymerization of methyl methacrylate (MMA) and hydrolysis–condensation of tetraethoxysilane (TEOS) under basic conditions simultaneously. Nanocomposite microparticles with a controlled morphology are fabricated from seed polymer/silica parti…
It is a well-known fact that scanning electron microscopic (SEM) image acquisition is mainly affected by nonlinearities and instabilities of the column and probe-specimen interaction; in turn, producing a shift in the image points with respect to many parameters and time, in particular. Even though this drift is compa…
Two long-chain amidoamine derivatives (C13A2AOH and C17A2AOH) bearing three amide moieties were synthesized and their gelation ability and pH responsivity were compared with a similar, previously reported amidoamine derivative gelator with two amide moieties. C13A2AOH and C17A2AOH gels prepared in water and organic so…
Photoinduced orientation of amorphous azo materials based on nunchaku-like molecules was studied by birefringence characterization, polarized infrared spectroscopy, and 2D-IR correlation spectroscopy. The nunchaku-like molecules (AZBP-CA and AZBP-CN) contained both an azo chromophore and a rigid biphenylene unit linke…
A zinc(II)-dipicolylamine coordination complex selectively associates with anionic liposomes, including sterically protected PEGylated liposomes, and causes rapid leakage of encapsulated contents.