SEARCH · Search NASA
Results for “Layer by layer deposition”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Atomic Layer Deposition Brings Applications of Two-Dimensional Silica to the Fore
Not provided.
Optimization of substrate-selective atomic layer deposition of zirconia on electroplated copper usin
Explore the source record for details and available documents.
Atomic layer deposited boron nitride nanoscale films act as high temperature hydrogen barriers
Not Available
Is atomic layer deposition of silver possible on N95 masks?
Explore the source record for details and available documents.
Surface modification of organic powders for enhanced rheology via atomic layer deposition
Not Available
Direct modification of pelletized 13X zeolite by atomic layer deposition toward effective CO2 capture from flue gas
Not Available
An enhanced activity of Pt/CeO2/CNT triple junction interface catalyst prepared by atomic layer deposition for oxygen reduction reaction
Not Available
Carbon nanotubes decorated with Pt as a viable electrocatalyst system using electrochemical atomic layer deposition
Surface limited redox replacement (SLRR) is an electrochemical deposition method designed to deposit metal thin films, typically onto other metals, that are mere monolayers in thickness, where such low dimensions allows catalyst-support interactions to affect catalyst efficiency. Here we explore the growth of Pt, using iterative Cu-mediated SLRR cycles, directly onto carbon nanotubes (CNTs) which are potentially good candidates as electrocatalyst supports due to their electrical conductivity and chemical resistance. Here scanning electron microscope images showed that Pt grew as nanoparticles, and hydrogen underpotential deposition from cyclic voltammetry showed that the active surface area approached an asymptotic value around eight iterations. Catalytic activity, measured using the oxygen reduction reaction, reached a maximum at ten iterations. Both are shown to be influenced by the growth mode, but electrochemical modeling indicates that the trend in activity is also due to a change in activation energy, possibly due to changes in Pt electronic structure due to interactions with the CNTs. Durability cycling showed a greater than 85% retention of surface area for the first 10,000 cycles of accelerated stress testing but decayed steadily to about 50% after 30,000 cycles. This performance may be related to the phenomenon that limits surface area growth.
Crystalline NiO films by hollow-cathode plasma-enhanced atomic layer deposition: Material properties and heterojunction device performance
Not Available
Atomic layer deposition and other thin film deposition techniques: from principles to film properties
Not Available