Materials Literature
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The extremely high thermal conductivity of individual carbon nanotubes, predicted theoretically and observed experimentally, has not yet been achieved for large nanotube assemblies. Resistances at tube-tube interconnections and tube-electrode interfaces have been considered the main obstacles for effective electronic…
A protrusion electrode structure is proposed to dramatically lower the operation voltage of the emerging blue-phase liquid crystal displays (BP-LCDs). Simulation results indicate that the generated horizontal electric field is not only strong but also penetrates deeply into the bulk LC layer. As a result, a low voltag…
Abstract Biobased plastics have experienced fast growth in the past decade thanks to the public concerns over the environment, climate change and the depletion of fossil fuels. This perspective provides an overview of the current global market of biobased plastics, their material properties, technical substitution pot…
Nanoparticles are important catalysts for petroleum processing, energy conversion, and pollutant removal. As compared to their bulk counterparts, their often superior or new catalytic properties result from their nanometer size, which gives them increased surface-to-volume ratios and chemical potentials. The size of n…
The adsorption of several common gas molecules over boron-, nitrogen-, aluminum-, and sulfur-doped graphene was theoretically studied using density-functional theory. B- and N-doped graphene retain a planar form, while Al and S atoms protrude out of the graphene layer. We find that only NO and NO2 bind to B-doped grap…
Abstract Wound dressings have experienced continuous and significant changes since the ancient times. The development starts with the use of natural materials to simply cover the wounds to the materials of the present time that could be specially made to exhibit various extraordinary functions. The modern bandage mate…
Due to their low bioavailability, many naturally occurring proteins can not be used in their native form in diseases caused by insufficient amounts or inactive variants of those proteins. The strategy of delivering proteins to biological compartments using carriers represents the most promising approach to improve pro…
Here, we review several articles of original research published in 2008 that concerned the toxicity of metal and carbon-based nanoparticles. Articles were selected from the MEDLINE PubMed database, all published or pre-published during 2008 and relating to nanomaterials, -particles or -structures and toxicity or healt…
In this study the sol–gel synthetic strategy was used to prepare organic–inorganic hybrid electrolyte systems composed of a di-urea cross-linked poly(ethylene oxide) (PEO)/siloxane (di-ureasil) matrix with a wide concentration range of lithium tetrafluoroborate (LiBF4). The assembly and preliminary characterization of…
By considering an interfacial layer between the electrode and the $BiFeO_{3}$($BFO$) layer, the polarization and the hysteresis behavior of $BFO$ film are simulated. It is found that the non-ferroelectric interface will increase the coercive field, and remarkably suppress the polarization of the ultrathin film under l…
Thin films of Fe3O4 have been deposited on single crystal MgO (100) and Si (100) substrates using pulsed laser deposition. Films grown on MgO substrate are epitaxial with c-axis orientation whereas, films on Si substrate are highly <111> oriented. Film thicknesses are 150 nm. These films have been irradiated with 200…
We fabricated Ni nanowires into arrays of pores on ion track-etched polycarbonate membrane, using electrodeposition technique. The pores, which have cylindrical shapes with 6 micron depth and 30 nm width, filled by Ni atoms, fabricating arrays of Ni nanowires. The nanowires then characterised using scanning and transm…
A kinetic Monte Carlo model is developed to simulate the oxygen reduction reaction and frequency response at the cathode of a 9 mol % yttria-stabilized zirconia fuel cell, using an asymmetrical cell scheme.To investigate the frequency-response characteristics, ac electrochemical impedance spectra have been studied wit…
Ten copolyamides have been synthesized by polycondensation of 2-(N-methylpiperazine)-4,6-bis(2-naphthoxy-6-carbonyl chloride)-s-triazine [MPNCCT] and different mixtures of diamines such as; 4,4′-diamino diphenylamide [DADPA] + 4,4′-diamino diphenyl sulphone [DADPS]; 4,4′-diamino diphenylamide [DADPA] + 4,4′-diamino di…
The exterior sides of calcium fluoride (CaF(2)) outcoupling mirrors are damaged by ArF laser light irradiation with high pulse-energy densities (80 mJ/cm(2)). The damage is generated by a partial alteration of the CaF(2) substrate to calcite. The CaF(2) decomposition is driven by photochemical processes due to the UV…
The CaCu3Ti4O12 (CCTO) is a material with a giant dielectric constant at room temperature and good temperature stability over a wide temperature and frequency ranges. The preparation method and doping has a great influence on the microstructure and dielectric properties of this material. In this work, the samples were…
In this paper, we report the covalent immobilisation of spiropyran on silica microbeads of 5 μm diameter and subsequent evaluation of the photoswitchable behaviour and light-modulated ion-binding properties of the spiropyran modified silica microbeads towards a range of different metal ions. The beads can be effective…
Isotropic chiral materials are rotationally symmetric but not mirror symmetric. Their salient optical property is that only a circularly polarized plane wave can propagate (in any direction) in them without change in polarization. In general, the major axis of an elliptically polarized plane wave changes direction—cal…
North Carolina State University Theses Industrial Engineering.;North Carolina State University Theses Industrial Engineering.
This work describes the decomposition of the electron density field of open-shell molecular systems into physically meaningful contributions. The new features that the open-shell nature of the wave function introduces into these fields are topologically studied and discussed, showing the charge concentration and deple…