Materials Literature
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We investigated tradeoff characteristics between resistivity and reliability for scaled-down Cu-based interconnects. A unique resistivity-measurement technique is proposed to detect influences due to impurity doping. Using this technique, we investigated the impacts of the impurity doping on three types of copper inte…
Low dielectric constant polyetherimides have been synthesized by incorporating a bisphenol A dianhydride, BPADA, and 2,7-bis(4-aminophenoxy) naphthalene (BAPN), a phenylene ether diamine. The flexible ether and larger planar naphthalene structure of BAPN led to more spacing between polymer molecules, resulting in less…
Carbon functionalized with sulfophenyl moieties provides an interesting way to understand the interdependence between the ionic species of the electrolyte and the electrode materials in carbon-based electrochemical capacitors. In situ measurements of the ionic resistivity of the electrolyte upon polarization revealed…
The mononuclear Os(II) complex [Os()(3)](PF(6))(2) ( = 5-methyl(1-methylbenzimidazol-2-yl)pyridine) is an obvious candidate for the design of an inert d-block-based tripodal receptor capable of binding and photosensitizing trivalent lanthanides (Ln(III)). It has thus been prepared and its two enantiomeric meridional (…
Glass plate‐supported nanostructure ZnO thin films were deposited by sol‐gel spin coating. Films were preheated at 275 ∘ C for 10 minutes and annealed at 350, 450, and 550 ∘ C for 80 minutes. The ZnO thin films were transparent ca 80–90% in visible range and revealed that absorption edges at about 370 nm. The c ‐axis…
Bithiophene associating 3,4-ethylenedioxythiophene and 3-bromothiophene, and the corresponding polymer exhibit self-rigidified structures of the conjugated backbones resulting from the association of S–Br and S–O non-bonded intramolecular interactions.
We present a comparative study of different oxidation methods for Cu, focusing on their effects on surface wettability for potential heat transfer applications. Various Cu2O/CuO nanostructures are formed on copper substrates using thermal and chemical oxidation methods. The morphology and chemical composition of the o…
Ferrites, with wide range of chemical compositions, have been studied extensively over the years as they have a plethora of applications such as magnetic read/write heads, transformer cores, antennas, microwave absorbers, deflecting yoke, high frequency transformers, catalysis, pigments etc. Particles of submicron siz…
The static linear and nonlinear optical properties of (ZnO)N clusters of N= 2-12 are studied using finite field approach within the framework of density functional theory. Most of these clusters feature ring or cage structures in the specific size range, differing much from the wurtzite structure of bulk ZnO. The low-…
Nanostructured hybrid thin films of the system tungsten oxide-poly͑3,4-ethylenedioxythiophene͒:poly͑styrenesulfonate͒ ͑WO 3 -PEDOT:PSS͒ were synthesized by first forming a tungsten-oxide layer by surfactant-assisted electrochemical method, followed by deposition of a PEDOT:PSS layer.The hybrid-film formation is primar…
Photochromic spiropyran molecules are utilized as additives for the development of polymer surfaces whose wetting characteristics can reversibly respond to irradiation with laser beams of properly chosen photon energy. The hydrophilicity is enhanced upon UV laser irradiation due to the photo-induced isomerization of t…
A mathematical model for the delamination of coating from active metal was developed in the presence of multiple electrochemical reactions, homogeneous reactions, and precipitation of corrosion product. The computational results illustrate that the propagation of potential front is controlled by the production of O H…
The synthesis, and spectroscopic and electrochemical properties of hydrogenated tetraazaporphyrins (TAPs), namely tetraazachlorins (TACs), tetraazabacteriochlorins (TABCs) and tetraazaisobacteriochlorins (TAiBCs), have been reviewed. While the first synthesis of this type of hydrogenated aromatic macrocycle was achiev…
In this study, we quantitatively and kinetically analyzed the electrostatic adsorption of ferritin and apoferritin onto the surface of precursor films by using QCM, SEM and AFM. The precursor films were successively prepared by the alternate adsorption of poly(diallyldimethylammonium chloride) (PDDA) and poly(sodium 4…
An atomic layer epitaxy technique was used to produce nanoscale 2.9-3.4 nm copper particles supported on silica, and the nanoscale Cu/SiO2 catalysts can show surprisingly high activity for the water gas shift reaction, in comparison with the 5.6 wt% Pt/SiO2 and 10.3 wt% Cu/SiO2 prepared by the impregnation method.
A polymeric dispersing agent for single-wall carbon nanotubes (SWCNTs) in water was synthesized by 4-(pyren-1-yl)butanoylation of the amine groups of poly-L-lysine. The pyrene content of 4-(pyren-1-yl)butanoylated polylysine (PBPL) was optimized so that a maximal dispersion effect of the SWCNTs was obtained. High mole…
We report the kinetics of below band-gap light induced photodarkening in (80-x)GeS(2)-20Ga(2)S(3)-xAgI (x = 0 and 20 mol %) bulk chalcogenide glasses by measuring the time evolution of transmission spectra at every 10 milliseconds. The results prove clearly the enhancement of photosensivity upon doping of AgI compound…
Epitaxial -axis oriented films were deposited onto and substrates by the pulsed injection metal organic chemical vapor deposition technique. Experimental conditions were optimized in order to accurately control the composition, thickness, and texture of the layers. X-ray diffraction was used to confirm the high crysta…
To improve the bioactivity of titanium surfaces, glow discharge was used to facilitate collagen grafting on titanium disks. Titanium test specimens were pre-treated by glow discharge fed with a mixture of argon and allylamine (AA) gases. Treated titanium disks were then grafted with type I collagen using glutaraldehyd…
The synthesis, structures and magnetic properties of two hexanuclear Mn6 clusters are reported: Mn6(mu4-O)2(dapdo)2(dapdoH)4(mu2-OH)2](ClO4)(2).6MeCN (1.6MeCN) and [Mn6(mu4-O)2(dapdo)2(dapdoH)4(mu2-OCH3)2](ClO4)(2).2Et2O (2.2Et2O) [dapdo2- is the dianion of 2,6-diacetylpyridine dioxime and dapdoH- is the monoanion of…