Materials Literature
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In this research, a new fluorinated diamine based on 2,2′‐substituted 1,1′‐binaphthyl units, 2,2′‐bis(2‐amino‐4‐trifluoromethylphenoxy)‐1,1′‐binaphthyl (AFPBN) was synthesized and then used to prepare the corresponding ortho ‐linked poly(ether‐imide)s via chemical polyimidization with several aromatic carboxylic dianh…
A transition state optimization method using a guided energy-represented direct inversion in the iterative subspace (gEn-DIIS) algorithm is introduced and compared with the quasi-Newton rational function optimization (RFO) method. A hybrid technique that employs a combination of RFO and guided DIIS methods at various…
Abstract Chitosan‐based tricomponent copolymers, chitosan‐ g ‐poly(ε‐caprolactone)‐( g ‐poly(oligo(ethylene glycol) methacrylate)) (CS‐PCL‐POEGMA, CPP), are synthesized as multifunctional nanocarriers for antitumor therapy. 2‐Bromoisobutyric acid and PCL are first site‐specifically conjugated onto the hydroxy groups o…
Co${}_{2}$FeSi/GaAs(110) and Co${}_{2}$FeSi/GaAs(111)B hybrid structures were grown by molecular-beam epitaxy and characterized by transmission electron microscopy (TEM) and x-ray diffraction. The films contained inhomogeneous distributions of ordered $L{2}_{1}$ and $B2$ phases. The average stoichiometry was controlle…
Polyurethane 52 Diethylene glycol (DEG) was distilled under vacuum at 105 o C. Trimethylol propane (98%) (TMP) was dried under vacuum at 40-45 o C for 2-4 h. Dichloromethane (CH2Cl2), 1,4dioxane and N,N-dimethylformamide (DMF) were distilled at 40 o C, 101 o C, 153 o C, respectively. The following chelate compounds of…
In spite of the fact that Basalt is a widespread type of rock, there is very little available information on using it as aggregates for concrete radiation shielding. This paper investigates the possibility of using Basalt for the aforementioned purpose. The results have shown that Basalt could be used successfully for…
Abstract The structural, vibrational, and electronic properties of low‐temperature supercooled GeTe 4 are studied using density functional theory (DFT). Two models have been considered: an ordinary melt‐quenched system containing a majority of defect‐octahedral germanium atoms, and a relaxed one obtained from a quench…
In this letter, an efficient subphthalocyanine (SubPc)/C 60 heterojunction organic photovoltaic device was demonstrated. The power conversion efficiency was improved from 2.7% to 4.3% by the sublimation of SubPc. The atomic force microscopic images showed that the crystallinity was improved with the sublimation of the…
Aluminum-doped zinc oxide ceramics with yttria doping (AZO:Y) ranging from 0 to 0.2 wt.% were fabricated by pressureless sintering yttria-modified nanoparticles in air at 1,300°C. Scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction analysis, a physical property measurement system, and…
This Perspective describes how multi-scale plasmonic structures with two or more length scales (fine, medium, coarse) provide an experimental route for addressing the inverse problem. Specific near-field and far-field optical properties can be targeted and compiled into a plasmon resonance library by taking advantage…
© 2012 da Silva et al., licensee InTech. This is an open access chapter distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Optic…
First applications of ellipsometry to the measurement of polyand nanocrystalline thin films date back to many decades. The most significant step towards the ellipsometric investigation of composite thin films was the realization of the first spectroscopic ellipsometers in the ’70s [3, 4, 8], which allowed the measurem…
Dense and flexible silicon dioxide-like barrier coatings were deposited by microwave postdischarge (downstream plasma). The optical transparency, recyclability, and compatibility with microwave usage are some of the advantages of SiOx offers as compared to thin metallic coatings. Generally, porous silicon dioxide coat…
In the present study, AZ41 and AZ51 alloys were fabricated using disintegrated melt deposition technique followed by hot extrusion. AZ41/Yttria and AZ51/Yttria composites were prepared using 0.6 wt% yttria nano particles in the alloys using the same fabrication technique. From the tensile test results, both strengths…
Abstract A generalized in situ synthesis approach has been developed to prepare primary‐amine‐terminated mesoporous silica particles incorporated with a wide range of nanoparticles in the size range 2–50 nm, such as quantum dots, iron oxide nanoparticles, doped semiconductor nanocrystals, and gold nanorods. The result…
Abstract This article reports on a simple and straightforward preparation method of poly(amidoamine)s (PAAs) with hetero‐difunctional chain ends as well as of several up to now hardly obtainable PAA derivatives of biotechnological interest, such as for instance PAAs of controlled molecular weight and narrow polydisper…
Novel oligomeric intumescent flame retardants, poly(amino phosphonate ester)s (PAPEs), containing both phosphorous and nitrogen, were synthesized by reacting diethyl phosphite with two different polyschiff bases obtained from the reaction of diamines with dialdehyde. The target PAPEs (designated as PAPE‐d and PAPE‐e,…
A series of polyurethanes were synthesized from poly(isopropyl lactate)diol, poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) triblock copolymer, and different aliphatic diisocyanates. The chemical structure and molecular characteristics were investigated by 1 H NMR, FT-IR, and GPC analysis. The effect…
Abstract This paper investigated the impacts of two deposition times (30 s, 60 s) and discharge powers (20 W, 50 W) on the resultant chemical and physical properties of plasma polymers (pp) formed using heptylamine (HA) or propionaldehyde (PA) monomers. Pinhole‐free pp films were formed on all surfaces at deposition r…
We show that sufficient concentrations of gold nanoparticles produced by an original synthesis method in EMT-6 and CT-26 cancer cells make it possible to detect the presence, necrosis and proliferation of such cells after inoculation in live mice. We first demonstrated that the nanoparticles do not interfere with the…