Chemisorption and Reactivity on Supported Clusters and Thin Films 1997
DOI: 10.1007/978-94-015-8911-6_4
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The Growth and Stability of Ultrathin Films on Metal and Oxide Surfaces

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Cited by 3 publications
(2 citation statements)
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“…A fresh alumina film was grown on the clean Ta(110) single crystal before each experiment, by evaporating Al in 5 × 10 –6 Torr of O 2 at sample temperature of 970 K. These growth conditions produce alumina with a distorted hexagonal lattice that resembles both γ-alumina (111) or α-alumina (0001). , Film thickness was monitored by XPS and was in the 4–6 nm range, which we previously found to give chemistry independent of film thickness …”
Section: Methodsmentioning
confidence: 99%
“…A fresh alumina film was grown on the clean Ta(110) single crystal before each experiment, by evaporating Al in 5 × 10 –6 Torr of O 2 at sample temperature of 970 K. These growth conditions produce alumina with a distorted hexagonal lattice that resembles both γ-alumina (111) or α-alumina (0001). , Film thickness was monitored by XPS and was in the 4–6 nm range, which we previously found to give chemistry independent of film thickness …”
Section: Methodsmentioning
confidence: 99%
“…Pt n + were created by laster vaporization, guided through 5 stages of differential pumping, then mass-selected to produce beams of atomically size-selected clusters (Pt n , n = 1–7), which were guided into an ultrahigh vacuum system, where they were deposited on alumina support. The alumina supports were ∼5 nm thick films grown on Ta(110), using growth conditions previously shown to give films with hexagonal symmetry. , We previously studied the effects of the alumina film thickness for Pt n /alumina/Ta­(110), finding that for films thicker than ∼3 nm, the Pt and alumina core valence electronic structures, ISS intensities, and activity for a probe reaction (CO oxidation) were thickness-independent . The total amount of Pt deposited on each sample was constant at 1.5 × 10 14 Pt atoms/cm 2 , corresponding to 0.1 of a close-packed Pt monolayer.…”
Section: Experimental Methodsmentioning
confidence: 99%