Tensor low-energy electron diffraction analysis of the surface structure of NaCl(100) thin films grown on Pd(100) and Pt(111)

Roberts, Joel G.; Hoffer, Saskia; Hove, M.A. Van; Somorjai, Gábor A.

doi:10.1016/s0039-6028(99)00686-x

Cited by 27 publications

(23 citation statements)

References 16 publications

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“…The fully optimized LiF(100) structure has the same general features as that found for NaCl(100), see Table 2, [7]. Specifically, the surface corrugation results from the movement of the alkali metal ions towards the bulk.…”

Section: Discussionmentioning

confidence: 73%

“…The film thickness was estimated to be >15 Å, as indicated by the absence of the substrate spots from the LEED pattern in the electron energy range used for data collection, 72-370 eV. LEED intensity data collection from a series of these patterns followed a standard procedure used previously with insulating thin films [7,11]. LEED data were collected at normal incidence with a crystal temperature of ≈115 K in 2 eV increments.…”

Section: Leed Observationsmentioning

confidence: 99%

“…This method has been applied successfully in the surface structural investigations of other large band gap materials [5][6][7][8]. More specifically, it was used in the surface structure determination of NaCl(100), whose LEED determined structure is analogous to the LiF(100) surface structure [7], see Table 2.…”

Section: Introductionmentioning

confidence: 99%

“…More specifically, it was used in the surface structure determination of NaCl(100), whose LEED determined structure is analogous to the LiF(100) surface structure [7], see Table 2. A key similarity is the corrugation of the NaCl(100) surface due to the cation being 0.12 Å below the surface anions.…”

Section: Introductionmentioning

confidence: 99%

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Surface structural analysis of LiF() thin films grown on Pt()

Roberts¹,

Hove²,

Somorjai³

2002

Surface Science

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The surface structure of a multilayer LiF(100) thin film grown on Pt(111) from the vapor has been determined by the automated tensor low energy electron diffraction (LEED) method. The final structure, which refined to a Pendry Rfactor (R P ) of 0.24, had a surface corrugation (∆ 1 ) of 0.24±0.04 Å due to the Li + being displaced towards the bulk, leaving the initially coplanar F -unshifted. A similar intralayer corrugation due to the movement of the Li + was also observed in the layer immediately under the surface layer, although to a lesser degree:

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Section: Discussionmentioning

confidence: 73%

Section: Leed Observationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Surface structural analysis of LiF() thin films grown on Pt()

Roberts¹,

Hove²,

Somorjai³

2002

Surface Science

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“…8b). The creative applications of tensor LEED to the covalent-bonded and ionicbonded materials such as NaCl [47] and ice [48,49] further proved the generality of the concept of 'flexible surface' (Fig. 9a, b).…”

Section: The Development Of Low Energy Electron Diffraction (Leed) Sumentioning

confidence: 88%

Major Successes of Theory-and-Experiment-Combined Studies in Surface Chemistry and Heterogeneous Catalysis

Somorjai

2010

Top Catal

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Experimental discoveries followed by theoretical interpretations that pave the way of further advances by experimentalists is a developing pattern in modern surface chemistry and catalysis. The revolution of modern surface science started with the development of surfacesensitive techniques such as LEED, XPS, AES, ISS and SIMS, in which the close collaboration between experimentalists and theorists led to the quantitative determination of surface structure and composition. The experimental discovery of the chemical activity of surface defects and the trends in the reactivity of transitional metals followed by the explanations from the theoretical studies led to the molecular level understanding of active sites in catalysis. The molecular level knowledge, in turn, provided a guide for experiments to search for new generation of catalysts. These and many other examples of successes in experiment-and-theory-combined studies demonstrate the importance of the collaboration between experimentalists and theorists in the development of modern surface science.

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