JA Switzer | PubMed Health

PubMed1999

Epitaxial Electrodeposition of Lead Sulfide on (100)-Oriented Single-Crystal Gold.

Small lattice mismatches and gas-phase deposition are typically used for growing epitaxial films on single-crystal substrates. A 1-µm thick film of PbS can be epitaxially electrodeposited onto a Au (100) single crystal. The large lattice mismatch (45.5 %) between Au and PbS is accommodated by the formation of a coincidence lattice, in which the epitaxial film is rotated by 45 degrees relative to the substrate. The coincidence lattice reduces the mismatch to +2.9 %.

Journal Article↗

PubMed1999

Electrodeposited ceramic single crystals

Single-crystal films are essential for devices because the intrinsic properties of the material, rather than its grain boundaries, can be exploited. Cubic bismuth oxide has the highest known oxide ion mobility, which makes it useful for fuel cells and sensors, but it is normally only stable from 729 degrees to 825 degrees C. The material has not been previously observed at room temperature. Single-crystal films of the high-temperature cubic polymorph of bismuth oxide were epitaxially electrodeposited from an aqueous solution onto single-crystal gold substrates. The 35.4 percent lattice mismatch was accommodated by forming coincidence lattices in which the bismuth oxide film was rotated in relation to the gold substrate. These results provide a method for producing other nonequilibrium phases that cannot be accessed by traditional thermal processing.

Journal Article↗