Materials Literature
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This paper presents both theoretical and numerical analyses of the piezoelectric and dielectric responses of a highly idealized film-on-substrate system, namely, a polarized ferroelectric film perfectly bonded to an elastic silicon substrate. It shows that both effective dielectric and piezoelectric properties of the…
The ternary and quaternary selenides, beta-CsBi3Se5, Rb2CdBi6Se11, CsAg(0.5)Bi(3.5)Se6, CsCdBi3Se6, Rb2Ag(1.5)Bi(7.5)Se13, and Cs2Ag(1.5)Bi(7.5)Se13, are all members of the new homologous series A2[M(5+n)Se(9+n)] and crystallize in structures related to each other in a systematic way; these compounds are mid gap semic…
This work describes the thermomechanical characterization and preliminary FEA modeling of commercial jet engine chevrons incorporating active Shape Memory Alloy (SMA) beam components. The SMA beams, when activated, induce the necessary bending forces on the chevron structure to deflect it into the fan flow and reduce…
Microcrystalline powders of boron-doped diamond were produced in the C–H–B system under a pressure of 8 GPa and at a temperature of more than 2000 K. The presence of boron in the C–B–H system was shown to decrease the temperature–pressure parameters for diamond synthesis compared with those for the binary C–H system (…
Polymeric materials are known to exhibit strong time-dependent mechanical behavior, as evidenced by rate-dependent elastic moduli, yield strength, and post-yield behavior. The nature of the rate sensitivity is found to change between different temperature regimes as various primary (α) and secondary (β, γ, etc.) molec…
In this paper a recently developed biodegradable phosphorylcholine ionomer (PC ionomer) was evaluated in different biological environments with a focus on the adsorption of proteins (fibrinogen) and the adhesion of cells. Our results have shown that the polar phosphoryl choline (PC) group may be enriched at the surfac…
Molecular mechanics simulation of atomic-scale peeling of carbon nanotube (CNT) from the graphite substrate surface is performed. We have first obtained the theoretical 'peeling force curve' of the CNT, where the CNT physically adsorbed on the graphite substrate surface is gradually retracted or peeled. In the simulat…
This paper investigates the bending stability of a multi-wall carbon nanotube (MWNT) embedded in an elastic medium, based on a multiple shell model. The effects of the surrounding elastic medium and the van der Waals forces between two adjacent tubes are taken into account. The critical bending moment and the correspo…
Fluorescent quantum dots (semiconductor nanocrystals) have the potential to revolutionize biological imaging, but their use has been limited by difficulties in obtaining quantum dots that are water soluble and biocompatible. The objectives of our research were to develop a methodology for encapsulation of cadnium-sele…
The isostructural complexes [{Tp'W(CO)(2)(eta(2)-C(2)S(2))}(2)M] (M = Ni, Pd, Pt) show that the eta(2)-C,C'-alkyne complexes of acetylenedithiolate at [Tp'W(CO)(2)](+) can generally act as dithiolate chelate ligands, leading to dithiolene type complexes.
This paper gives information regarding a new solid‐state thin film electrochromic device (ECD) designed for IR emissivity modulation. The variable emissive properties make the new ECD an ideal spacecraft antenna thermal management system. Specific attention is focused on a new electrochromic system (an Eclipse Energy…
A system level analysis, inclusive of mass, is carried out for a cryogenic hydrogen fueled hybrid solid oxide fuel cell and bottoming gas turbine (SOFC/GT) power system. The system is designed to provide primary or secondary electrical power for an unmanned aerial vehicle (UAV) over a high altitude, long endurance mis…
Abstract Deconstruction is the selective dismantling of building structures to recover the maximum amount of primarily reusable and secondarily recyclable materials in a safe and cost-effective manner. Deconstruction is a labor intensive process and can be difficult to achieve in a time-efficient and economical manner…
Along with climate and physical activity, textiles have an effect on sweating and the development of odours. Accordingly, textiles inadequately optimized in terms of clothing technology as a result of poorly cut structures or poor materials result in increased sweating and odour. However, the development of body odour…
Micron-scale ordered patterns of highly conjugated molecules consisting of a [2.2]paracyclophane framework containing a conjugated linear arylethynyl side-chain are prepared. These patterns were obtained through an approach where a metallic (Cu) grid is positioned onto indium-tin-oxide (ITO)/glass substrates followed…
Carbon nanotube (CNT) vertical integration and electrical properties are presented in full 6-inch wafer for interconnect applications. Series array of 1000 vias made of vertically grown CNTs is obtained with uniform electrical resistances within the wafer. Integration processes are implemented by following sequential…
A family of ligands based upon the linking of two or three bis-(2-pyridyl)pyridazine (dppz) moieties via the 4- or 4,5-positions of the pyridazine rings has been synthesised using an inverse electron demand Diels–Alder pathway. Thus, reaction of 3,6-di(2-pyridyl)-1,2,4,5-tetrazine (dptz) with a series of dienes (1,4-d…
In 1911, Vorlärnder reported liquid-crystalline properties of unique “flying-seed-like” alkali metal carboxylates. They are neither “rod-like” nor “disk-like”. Moreover, they have neither a rigid core nor flexible long chains. The molecular shapes are totally different from about 93 000 general liquid crystalline comp…
Protein crystals, routinely prepared for the elucidation of protein 3D structures by X-ray crystallography, present an ordered and highly accurate 3D array of protein molecules. Inherent to the 3D arrangement of the protein molecules in the crystal is a complementary 3D array of voids made of interconnected cavities a…
Location of partial discharge sources via the recording of wideband VHF/UHF signals is well known. Having obtained good accuracies, researchers in this area now aim to develop characterization techniques comparable to those of more traditional contact systems. One obstacle hindering this development is the lack of a c…