Materials Literature
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Due to the limited ability of the adult lung to regenerate and the frequency of lung disease, the lung is a tissue that can especially benefit from regenerative medicine. Prospects for lung regeneration have made great strides in the past year. In this review, we summarize recent progress and key challenges for approa…
We demonstrate three-dimensional (3D) surface profiling of the water-oil interface in a tunable liquid microlens using a Shack-Hartmann wave front sensor. The principles and the optical setup for achieving 3D surface measurements are presented and a hydrogel-actuated liquid lens was measured at different focal lengths…
This study demonstrates the detrimental impact of Cr on the electronic conductivity of a LaNi0.6Fe0.4O3 (LNF) porous cathode layer at 800 ºC. Vapor transport of Cr-species, originating from a porous metallic foam, and subsequent reaction with LNF results in a decrease of the electronic conductivity of the LNF-layer. C…
The growth of high-k oxides on III-V surfaces is of vital importance if high-mobility channels are to replace Si in upcoming CMOS technology nodes. Whether these dielectrics are deposited directly on the channel material itself for surface channel devices or on a III-V barrier layer for reduced leakage in buried chann…
Extending copper electrochemical deposition to 3x nm nodes and beyond requires a new plating approach that is not constrained by typical PVD copper seed step coverage performance. To this purpose, we propose a copper direct plating process on Plasma Enhanced Atomic Layer Deposition (PEALD) Ru -based resistive substrat…
Large-scale electrical energy storage is becoming increasingly necessary due to the continued growth of intermittent renewable sources such as wind and solar. Reversible solid oxide cells (SOCs) have many desirable attributes for this application, but round trip efficiency is expected to be relatively low. Here we use…
The magnon pumping effect in ferromagnetic insulators under an external time-dependent transverse magnetic field is theoretically studied. Generation of a magnon current is discussed by calculating the magnon source term in the spin continuity equation. This term represents the non-conservation of magnons arising from…
Cubic-structured HfLaO embedded tetragonal ZrO2 is investigated for application to a dynamic random access memory capacitor dielectric. It is found that hole injection is the determining factor of the leakage current in the ZrO2–HfLaO stack and thus HfLaO should be kept away from the electrode interface due to its sma…
Delphi is developing Solid Oxide Fuel Cell (SOFC) technology for applications in a variety of markets, in participation with the U.S. Department of Energy (SECA, EERE). This paper outlines the development of SOFC stacks and discusses the latest results, including key features of the cell and stack developed under the…
Metal-supported fuel cells (MSC) are one of the most focused SOFC technologies world-wide for so-called APUs (auxiliary power units) in heavy duty vehicles. In the scope of the present work MSC cells were developed on the basis of a porous support made from a ferritic oxide dispersion strengthened Fe-Cr alloy (ITM). A…
A new generation of tubular SOFCs with an approach to solve the thermal and redox cycling issues of these fuel cells is introduced and the method of fabrication is explained. The cell consists of a porous support coated with a thin electrolyte. Following porous support infiltration of Ni-SDC to create the anode, 100 t…
Direct nanobonding of p-Si/n-GaAs wafers based on surface activation that uses an Argon (Ar)-fast atom beam at room temperature has been investigated. The bonding strength of the interface was 14.4 MPa at room temperature, and remained nearly constant after annealing up to 600 °C. An amorphous layer with a thickness o…
We have fabricated assemblies of molecular junctions comprised of superparamagnetic Fe3O4 nanoparticles self-assembled with alkane molecules of different lengths as the spacer. The electrical resistance increases exponentially over nearly two decades as the molecular length varies from 0.7 to 2.5 nm, indicating that e…
Abstract High curing temperature is the key disadvantage of cyanate esters. A novel catalyst system was developed, which is a hybrid catalyst system (HC) consisting of UV activated tricarbonyl cyclopentadienyl manganese (Catalyst I) and Catalyst II derived from dibutyl tin dilaurate. The effect of HC on the reactivity…
Resistivity measurements performed under pressure in the paramagnetic ground state of CeRu2Si2 are reported. They demonstrate that the relative change of effective mass through the pseudo metamagnetic transition is invariant under pressure. The results are compared with the first order metamagnetic transition due to t…
Nanocrystalline (40-50 nm) powders of MnCo2O4-δ spinel have been synthesized through combustion technique at a relatively low temperature. The fuel to oxidant ratio has been optimized by carrying out the combustion reaction under various redox conditions (i.e. varying fuel : nitrate ratio) using different fuels viz.,…
Solid oxide fuel cell (SOFC) operation in three modes is described: Power generation (SOFC), conventional electrolysis (SOEC), and fuel-assisted electrolysis (SOFEC). In the SOFEC mode, part of the applied voltage is replaced by chemical potential difference as the driving force. Steam is supplied at the oxygen supply…
A simple parallel tandem solar cell based on a combination of Zn-phthalocyanine (Pc) and ClInPc has been fabricated and characterized. Compared to a traditional series tandem cell, parallel tandem cells eliminate the need for a semitransparent recombination layer, reducing the complexity of device fabrication while st…
The ethynyl metal hydride molecules (HM-C≡CH) are identified in the matrix infrared spectra from reactions of laser-ablated Mn and Re atoms with acetylene using D and (13)C isotopic substitution and density functional computed frequencies. The assignment of strong M-H as well as C≡C bond stretching product absorptions…
Thin silicon nitride (Si3N4) films deposited using plasma-enhanced chemical deposition (PECVD) method have been used as metal-insulator-metal (MIM) capacitor dielectric for GaAs hetero-junction bipolar transistor (HBT) technology. The characteristics of the films, which were deposited at 300oC, were found to be depend…