Materials Literature
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A new fabrication process was proposed for half-Heusler type TiNiSn thermoelectric alloys. Based on the result that the TiNiSn phase can be formed easily at the Sn(Liquid)/TiNi(Solid) interface, the liquid-solid reaction-sintering process was developed using TiNi and Sn powders. The TiNi compound powders were prepared…
Solid oxide fuel cells (SOFCs) enable environmentally friendly energy to be produced with high efficiency. The market entry of SOFC systems depends on the functionality of the components and on the costs. The SOFC has not yet reached market maturity. This presentation focuses on the possibilities for manufacturing SOF…
This work investigates the mechanical properties of Ti-Cr system alloys and focuses on the microstructure, the Young’s modulus, the deformation mechanism and the deformation behaviour observed in various alloy compositions. The addition of Al to the Ti-Cr system alloys greatly decreases the Young’s modulus. Addition o…
A novel halogen-free flame-retardant system composed of dawsonite and magnesium hydroxide was used for flame-retarded ethylene vinyl acetate. The thermal and fire properties of flame-retarded ethylene vinyl acetate system were evaluated by thermagravimetric analysis (TGA), limiting oxygen index (LOI) and UL-94 test wh…
Pure titanium has good specific properties i.e. low density of 4.5g/cm3, extremely high resistance for corrosion and good elongation. However, its mechanical properties are not enough to be employed as structural parts and components. Accordingly, titanium alloys are often applied to industrial fields due to their hig…
Exponential growth in information technology generates ever increasing amounts of data, making recording density of the storage media crucially important. Two-photon absorption was proposed as a basis for high-density multi-layer technology for optical memory and logic devices. This technology suggests to use polymers…
The purpose of this research is the development of a high strength α-β brass (Cu-40Zn) with additions of elements of small solid solubility in brass. Cu-40Zn with 0.6 wt.% Tin (Sn), 0.73 wt.% Chromium (Cr) and 0.51 wt.% Iron (Fe) were prepared by casting (Cu-40Zn-CrFeSn). The yield stress (YS) and ultimate tensile str…
Cold drawn low carbon steel wires are widely used in several engineering applications where a proper combination of strength and ductility is of the paramount importance. In the present paper, the multi-pass angular accumulative drawing (AAD) is proposed as a new forming process where the high strain accumulation is u…
The high temperature and irradiation response of a new class of nanostructured ferritic alloys have been investigated by atom probe tomography. These materials are candidate materials for use in the extreme environments that will be present in the next generation of power generating systems. Atom probe tomography has…
Titanium exhibits many attractive properties. It is considered to be ubiquitous since it has the 9th-highest Clarke number of all the elements. However, the principal beta-stabilizing elements for titanium can be very expensive, making many titanium alloys expensive. Manganese is a beta stabilizer for titanium alloys…
Donor-substituted cyanoethynylethenes (CEEs) are planar push-pull chromophores featuring intense intramolecular charge-transfer (CT) interactions and high third-order optical nonlinearities. Their thermal stability allows for the formation of crystalline thin films by vapor-phase deposition. On the other hand, high-qu…
Silica, silica/polydimethylsiloxane and silica/polydimethylsiloxane/calcium xerogels were examined as polymeric carriers for the controlled release of drug—Metronidazole. Characterization assays comprised analysis of the matrix by Fourier transform infrared spectroscopy (FTIR), determining the specific surface area of…
Rhizophora mangle L. is a vegetal species widely distributed in Cuba and other Caribbean countries. This species is characterized by several ethnobotanical activities as antiseptic, astringent, as well for treating skin ulcers. In the present work, we describe a pharmacological, toxicological and chemical evaluation o…
The new ${\text{TbMn}}_{1\ensuremath{-}\text{x}}{\text{Sc}}_{\text{x}}{\text{O}}_{3}$ series has been synthesized and the structural properties have been characterized by x-ray diffraction, neutron diffraction, and x-ray absorption spectroscopy. The whole series belongs to the family of $AB{\text{O}}_{3}$ perovskites.…
In this paper, the dynamic behaviour of a single-walled carbon nanotube (SWCNT) for nanoparticle delivery is studied using non-local elasticity theory. The response of the delivery system depends on the time history and velocity of the moving nanoparticle. In addition, the interaction between the SWCNT and the moving…
Based on the consideration on size-dependent temperature T m (D) where D denotes the diameter of nanoparticles and nanowires or the thickness of thin films, the size-dependent band-gap ΔE g (D) and dielectric constant ε(D) of low dimensional materials are modeled without any adjustable parameter. The model predicts an…
Flying south for the winter! Polymeric nanoparticles were synthesized using either a photoinduced or base-catalyzed free-radical polymerization method. The particles (Ø=50 nm), loaded with a dye (IR-786), were observed to migrate over 20 cm to the sentinel lymph node after injection in a live pig.
The growth in nanotechnology has prompted a focus on the development of occupational health and safety recommendations for those working with engineered nanomaterials (ENM) at both the laboratory and the manufacturing levels. Although the nascent field of nanotoxicology has shown that some nanoparticles may present a…
A new interesting class of polyamides of diarylidenecycloalkanone containing azo groups in the polymer backbone 6 a-d was synthesized by a solution polycondensation reaction of bis 2-aminoarylidene monomers 3 a,b with 4,4′-azodibenzoyl dichlorides and 3,3′-azodibenzoyl dichlorides in NMP as a solvent, using anhydrous…
In this letter, a pH-responsive reactivated biointerface is fabricated using an inclusion reaction between an azobenzene-containing self-assembled monolayer and pH-responsive poly(ethylene glycol)-block-poly(acrylic acid) grafted with cyclodextrins. The pH-responsive interface can be switched between an extended state…