Initial stages of nickel oxide growth on Ag(001) by pulsed laser deposition

Phark, S. H.; Chang, Young Jun; Noh, Tae Won; Kim, J.-S.

doi:10.1103/physrevb.80.035426

Cited by 12 publications

(7 citation statements)

References 56 publications

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“…A widely investigated system in which such a process has been observed is the NiO/Ag(001) interface, where the deposition of NiO induces the displacement of Ag atoms from the terraces. The resulting complex interface is characterized by the presence of vacancy islands on the substrate and NiO islands embedded in the topmost layers of the Ag(001) surface [59][60][61][62][63][64][65]. Oxide islands embedded in metallic substrates have been observed also for MgO [66,67] and FeO [68] nanolayers grown on Ag(001), as well as for FeO [69] and CoO [70] films deposited on Au (111).…”

Section: Mesoscopic Morphologymentioning

confidence: 95%

Reactive metal–oxide interfaces: A microscopic view

Picone

Riva

Brambilla

et al. 2016

Surface Science Reports

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Metal-oxide interfaces play a fundamental role in determining the functional properties of artificial layered heterostructures, which are at the root of present and future technological applications. Magnetic exchange and magnetoelectric coupling, spin filtering, metal passivation, catalytic activity of oxide-supported nano-particles are just few examples of physical and chemical processes arising at metal-oxide hybrid systems, readily exploited in working devices. These phenomena are strictly correlated with the chemical and structural characteristics of the metal-oxide interfacial region, making a thorough understanding of the atomistic mechanisms responsible of its formation a prerequisite in order to tailor the device properties. The steep compositional gradient established upon formation of metal-oxide heterostructures drives strong chemical interactions at the interface, making the metal-oxide boundary region a complex system to treat, both from an experimental and a theoretical point of view. However, once properly mastered, interfacial chemical interactions offer a further degree of freedom for tuning the material properties. The goal of the present review is to provide a summary of the latest achievements in the understanding of metal/oxide and oxide/metal layered systems characterized by reactive interfaces. The influence of the interface composition on the structural, electronic and magnetic properties will be highlighted. Particular emphasis will be devoted to the discussion of ultra-thin epitaxial oxides stabilized on highly oxidizable metals, which have been rarely exploited as oxide supports as compared to the much more widespread noble and quasi noble metallic substrates. In this frame, an extensive discussion is devoted to the microscopic characterization of interfaces between epitaxial metal oxides and the Fe(001) substrate, regarded from the one hand as a prototypical ferromagnetic material and from the other hand as a highly oxidizable metal.

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Section: Mesoscopic Morphologymentioning

confidence: 95%

Reactive metal–oxide interfaces: A microscopic view

Picone

Riva

Brambilla

et al. 2016

Surface Science Reports

View full text Add to dashboard Cite

show abstract

“…7 inset). The deposited volume per pulse and per unit surface is V = 7.8 × 10 10 nm 3 /cm 2 and by using V C = 0.033 nm 3 as the mean cluster volume (estimated from STM image analysis), R is obtained: 12 cluster pulse cm 2 .…”

Section: Cluster Deposition and Growth Modelmentioning

confidence: 99%

“…It has been shown that PLD under vacuum conditions, even at room temperature, results in a higher island nucleation density with respect to molecular beam epitaxy (MBE), thus allowing atom-by-atom deposition of films with a controlled layer-by-layer morphology. [9][10][11][12] Moreover, it is known that laser ablation in the presence of an inert background gas results in a spatial confinement of the expanding plasma favoring cluster formation due to increased collision rate with the surrounding gas molecules [13][14][15] and thus allowing deposition of preformed clusters and growth of cluster-assembled materials. 16 In this framework, the comprehension of the parameters affecting plasma expansion dynamics and their role in regulating the deposition process is fundamental for the synthesis and deposition of clusters and for the growth of cluster-assembled films with tailored properties.…”

Section: Introductionmentioning

confidence: 99%

Energetic regimes and growth mechanisms of pulsed laser deposited Pd clusters on Au(111) investigated byin situscanning tunneling microscopy

et al. 2011

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Pulsed laser deposition (PLD) and in situ scanning tunneling microscopy (STM) have been employed here to investigate different deposition regimes for the synthesis of Pd nanoislands on Au(111). Atom-by-atom deposition at high kinetic energy or cluster deposition at different kinetic energies are allowed by PLD depending on experimental conditions. At variance with evaporation, which results in Pd island nucleation at the elbows of the 22 × √ 3 herringbone reconstruction of Au (111), PLD in vacuum leads to random island nucleation with a profound modification of surface reconstruction. In addition, deposition of preformed Pd clusters can be obtained by ablating in the presence of a background gas, and the deposits turn out to be strongly affected by both the energetic regime and by the complex anisotropic structure of the substrate surface. Low energy deposition allowed us to deposit ultrafine clusters (<2 nm), which aggregate in islands at preferential sites of the Au(111) reconstructed surface. Comparison with atom-by-atom deposition (i.e. evaporation), in which island size is strongly related with coverage and leads to lifting of the reconstruction at a coverage well below 40%, shows that low energy deposition by PLD results in a cluster arrangement nicely following the underlying surface reconstruction, in parallel rows at 40% coverage and in a zig-zag fashion for coverages up to 70%. Analysis of this deposition regime reveals that it follows a deposition diffusion aggregation (DDA) model of growth with some peculiar characteristics related to the supporting Au(111) surface reconstruction.

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“…Pulse laser deposition (PLD) is a one method used to fabricate high-quality thin films that is advantageous in tuning the film characteristics [10]. However, there are a few reports on the fabrication of NiO thin film arrays using PLD [11][12][13]. In contrast, there is a wide range of investigations on high/low temperature oxidization of pure nickel.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Porous‐Structured Nickel Oxide Thin Film by Pulsed Laser Deposition

Jahromi

Huang

Kamalianfar

et al. 2012

Journal of Nanomaterials

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Porous-structured nickel oxide (PsNiO) was obtained through the oxidization of a nickel thin film. The nickel thin film was deposited using the pulsed laser deposition (PLD) method on a nickel foil as a substrate. The results show uniform PsNiO after the oxidization of the nickel thin film at 750∘C for 1 h. X-ray diffraction (XRD) indicates formation of the NiO crystalline structure. Field emission scanning electron microscopy (FESEM) reveals different morphology on the surface of the nickel foil (sample A) and on the nickel thin film (sample B). Comparison of the FESEM results after oxidization shows that the PsNiO on the nickel thin film was more regular and controllable than the NiO layer on the nickel foil. The FESEM images also show that the thickness of the nickel thin film affected the PsNiO size obtained after oxidization. This resulted from the growth of the porous structure at grain boundaries and from the grain sizes. The electrochemical properties of the PsNiO as an electrode are investigated by cyclic voltammetry (CV). These results show the effect of PsNiO size on the current of anodic peak.

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Initial stages of nickel oxide growth on Ag(001) by pulsed laser deposition

Cited by 12 publications

References 56 publications

Reactive metal–oxide interfaces: A microscopic view

Reactive metal–oxide interfaces: A microscopic view

Energetic regimes and growth mechanisms of pulsed laser deposited Pd clusters on Au(111) investigated byin situscanning tunneling microscopy

Facile Synthesis of Porous‐Structured Nickel Oxide Thin Film by Pulsed Laser Deposition

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