نتایج جستجو برای: pseudomorphic
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1. Introduction In developing materials and processes for VLSI, the demands of high manufacturing yield make it necessary to consider approaches which are inherently capable of creating structures without defects. For example, the success of the well-known Si/SiGe/Si HBT relies on pseudomorphic strained layers below critical thickness to avoid misfit dislocations. Similarly, since the role of s...
The bipolar effect of GaAs substrate and nearby layers on photovoltage of vertical metamorphic InAs/InGaAs in comparison with pseudomorphic (conventional) InAs/GaAs quantum dot (QD) structures were studied. Both metamorphic and pseudomorphic structures were grown by molecular beam epitaxy, using bottom contacts at either the grown n +-buffers or the GaAs substrate. The features related to QDs, ...
Adsorption of sulfate assists Cu monolayer underpotential deposition (upd) on Au(111) in a unique way, rendering two distinct structural stages: (i) formation of a low-density Cu phase at coverage of 2/3 ML known as the ffiffiffi 3 p ffiffiffi 3 p R30 or honeycomb phase; (ii) formation of a complete monolayer, i.e., Cu-(1 · 1) phase pseudomorphic with respect to underlying Au(111) substrate. In...
Introduction One of the great challenges of our time is the efficient and equitable consumption of fossil fuels. One of the consequences of our need to conserve our finite petroleum resources is a transition to more efficient diesel engines and lean burning gasoline engines. Associated with the switch to these lean burning engines is an increase in NOx production which results in a need to impr...
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