Sandwich technology

The following information concerns foams for sandwich technology only and not foams used for packaging or insulation. 

Generally, the properties of the polystyrene foams used for sandwich technology are ... 

When established protocols for bulk MIP syntheses were adapted for coating of flat surfaces, the MIP layers resemble the monolithic or particle aggregate structures obtained in the in situpreparation ofMIPs (cf above) [70]. However, homogeneous thin films could also be obtained using the sandwich technology, imprinting of a SPR sensor surface was demonstrated, hence MIP film thickness was less than 100 nm [72]. 

Gate oxide dielectrics are a cmcial element in the down-scaling of n- and -channel metal-oxide semiconductor field-effect transistors (MOSEETs) in CMOS technology. Ultrathin dielectric films are required, and the 12.0-nm thick layers are expected to shrink to 6.0 nm by the year 2000 (2). Gate dielectrics have been made by growing thermal oxides, whereas development has turned to the use of oxide/nitride/oxide (ONO) sandwich stmctures, or to oxynitrides, SiO N. Oxynitrides are formed by growing thermal oxides in the presence of a nitrogen source such as ammonia or nitrous oxide, N2O. Oxidation and nitridation are also performed in rapid thermal processors (RTP), which reduce the temperature exposure of a substrate. 

Sandwich panels of rigid polyurethane - HCFC- 141b, HCFC-22, blends of HCFC-22 and -141b, pentane, and HFC-134a are now used as alternatives to CFCs in this application. In the long term, HFCs and carbon dioxide/water will be the replacement technologies. 

The ED process is a reliable, membrane-based, electrically driven demineralization technology that is more than 50 years old. It is suitable for the production of basic pure water from lower TDS supply sources. Commercial ED units consist of hundreds of individual cells in a modular membrane sandwich arrangement, bounded by electrodes and linked to a direct current (DC) rectifier-controller. The total treated water flow is a function of the number of cells in the ED unit. 

The creation of nanoscale sandwiches of compound semiconductor heterostructures, with gradients of chemical composition that are precisely sculpted, could produce quantum wells with appropriate properties. One can eventually think of a combined device that incorporates logic, storage, and communication for computing—based on a combination of electronic, spintronic, photonic, and optical technologies. Precise production and integrated use of many different materials will be a hallmark of future advanced device technology. 

The individuals listed below in chronological order (1972-2006) worked in my laboratory as postgraduate students, senior scientists, research assistants, post-doctoral fellows, technicians, visiting scholars, and Erasmus or Sandwich students. I take this opportunity to express my gratitude for their contributions to the science and technology of liposomes and other delivery systems, as well as their support and friendship. I am most grateful to my secretary of 14 years, Concha Perring, for her hard work, perseverance, and loyalty. 

The formation of sandwich-type POMs from solutions of metal cations and triva-cant heteropolytungstate species may alternatively be viewed as means to sequester cations from solution [116]. The question then arises if reversible dissociation of the metal cations from the multidentate ligands is possible as well. The sequestration and subsequent release of metal cations under appropriate conditions is of considerable interest in waste decontamination technology as well as in medicine [124]. Following these ideas, the demetallation process of ten multi-iron Wells-Dawson polyoxometalates is studied by cyclic... 

The applications of aluminum are growing larger and more varied with tile introduction of advanced materials engineering techniques, including sandwich-type construction, laminates, aluminum powder metallurgy, and composite technology,... 

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