Materials Literature
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An air conditioning system for housing has been designed. It is based on the thermoelectricity technology and supplied with photovoltaic solar panels. The equipment has a power of 1400 W and consists of 48 Peltier pellets, integrated in the ceiling of the room, with aluminium plates as heat exchangers. For the design…
Void formation and growth is a major problem for solder interface materials, because they impede heat conduction from the silicon die to heat spreader/heat sink in semiconductor electronic devices. This work uses infrared microscopy to measure temperature distributions on the interfacial layer through the silicon die.…
Abstract Melt intercalation of the methylsilylated organoclays with polar polymers such as SAN was examined to verify the adhesive role of guest polymeric chains between hydrophilic clay layers, so‐called “glue effect” on intercalation behavior. Once methylsilylated organoclay was melt‐blended with SAN, it was found t…
Abstract The mechanism and kinetics of the thermal cure reaction of two cyanate esters (CEs), 1,1′bis(4‐cyanatophenyl)ethane (AroCy L‐10) and bisphenol A dicyanate ester (BADCy), in the presence of dibutyl tin dilaurate (DBTDL) has been investigated using Fourier‐transform infrared spectroscopy (FTIR) and High‐perform…
As the trend of highly integrated electronics and simultaneous miniaturization escalates to include faster processors, more functions, and higher bandwidths, electronics continue to become more compact in response to size limitations and strict reliability requirements. The result is an increasing heat flux at both th…
A simple chemical vapor deposition in a graphite crucible was employed in the development of two-dimensional nanomaterials of boron carbide. The sole starting material was B 2 O 3 powder, and the deposition was undertaken on a chemically and thermally stable insulating template, graphitic boron nitride. The majority o…
High-field magnetization and susceptibility measurements have been performed on $S=1$ antiferromagnetic bond-alternating chain compounds: $[{\mathrm{Ni}}_{2}(\mathrm{dpt}{)}_{2}(\ensuremath{\mu}\ensuremath{-}\mathrm{ox})(\ensuremath{\mu}\ensuremath{-}{\mathrm{N}}_{3})]$$({\mathrm{PF}}_{6})$ [dpt=bis(3-aminopropyl)amin…
The AP7 and AP24 proteins represent a class of mineral-interaction polypeptides that are found in the aragonite-containing nacre layer of mollusk shell (H. rufescens). These proteins have been shown to preferentially interfere with calcium carbonate mineral growth in vitro. It is believed that both proteins play an im…
Molecular dynamic simulations are reported for the static and dynamic properties of hard sphere fluids in matrices (or media) composed of quenched hard spheres. The effect of fluid and matrix density, matrix structure, and fluid to matrix sphere size ratio on the static and dynamic properties is studied using disconti…
Samples of vertically aligned carbon nanofibers (VACNFs) were viewed transverse to the growth direction and studied using both scanning and transmission electron microscopy. The VACNFs are composed of graphite layers nearly parallel to the substrate at their bottom end, gradually formed graphite “cups” in the main bod…
Abstract The dielectric response of poly [( R )‐3‐hydroxybutyrate] (PHB) was investigated as a function of time after quenching a film from the melt to a crystallization temperature of 20 °C. In the frequency range investigated (20 to 10 6 Hz) a relaxation maximum was observed–attributable to the glass transition–whic…
We present a new way to protect polyelectrolyte multilayers from water, consisting in the adsorption and subsequent fusing of charged wax particles atop a multilayer. The formation of the wax layer is demonstrated by different techniques such as ellipsometry, contact angle measurements, and atomic force microscopy. Th…
Copper (Cu) based interconnect technology is expected to meet some of the challenges of technology scaling in the pursuit of higher performance. However, Cu interconnects are still susceptible to electromigration-induced failure over time. We describe a new hierarchical approach for predicting the reliability of Cu-ba…
A birefringence-imaging study of a crystal of SrTiO3 shows a purely second-order phase transition close to 105 K with no measurable indications of critical fluctuations. The near perfectly linear development of the birefringence near the phase transition is consistent with normal Landau mean-field behaviour with an or…
Abstract Cellulose arylphosphonate compounds have been synthesized and investigated by the kinetics of thermal degradation by thermogravimetry (TG) and differential scanning calorimetry (DSC) from ambient temperature to 600°C. Various kinetic and thermodynamic parameters such as energy, entropy and free energy of acti…
The variation in molecular and electronic structure of doped (as synthesized) conducting, dedoped base, and redoped conducting forms of polyaniline (PANI) prepared by oxidative enzymatic polymerization of aniline with and without the presence of polyelectrolyte template was analyzed by solid-state 13 C and 15 N CP/MAS…
Pulse laser ablation and subsequent laser nanostructuring at room temperature has been employed to produce nanostructured Ni on SiO2/Si substrates for catalytic growth of carbon nanotubes. The resultant nanostructured surface is seen to consist of nanometer sized hemispherical droplets whose mean diameter is controlle…
Die größte metallorganische Clusterverbindung, die ausschließlich aus Al, C und H besteht (Al50Cp, Cp*=C5Me5), weist eine faszinierend einfache Struktur mit relativ hoher Symmetrie auf (siehe Bild). Das von den Pentamethylcyclopentadienyl-Liganden aufgebaute Kohlenstoffgerüst ähnelt dem der Fullerene.
The kinetics of phase separation in thin polymer blend films displaying discrete and bicontinuous domain morphologies are examined. For discrete domains, the correlation length xi grows as t(1/3), in agreement with a coalescence model. By plotting xi/d vs t/t(i) (initiation time), universal growth behavior is obtained…
As the power consumption of a large number of microelectronic devices has been continuously reduced in recent years, power supply units of a few microwatts have become sufficient for their operation. Our improved micro-scale thermoelectric generator (/spl mu/-TEG) is based on polysilicon surface micromachining and is…