Morphology and chemical activity at the Au/NiO interface

Benedetti, Stefania; Torelli, Piero; Luches, Paola; Rota, Alberto; Valeri, Sergio

doi:10.1016/j.susc.2006.01.152

Cited by 11 publications

(10 citation statements)

References 15 publications

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“…On the other hand, the faint XPD pattern indicates that NiO x clusters are formed with an fcc structure characterized by some residual order. One possible explanation is that some Ni atoms are diluted in the growing Ag film similarly to what has been reported in the case of the deposition of Au on NiO [41]. However, this would lead to the formation of a metal-like component in the Ni 2p XPS spectrum, which is not in tune with our findings (see Fig.…”

Section: Xpd Resultscontrasting

confidence: 44%

Silver nanostructures on a c(4×2)-NiOx/Pd(100) monolayer

et al. 2008

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Section: Xpd Resultscontrasting

confidence: 44%

Silver nanostructures on a c(4×2)-NiOx/Pd(100) monolayer

et al. 2008

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“…This growth mode is a thermodynamically favorable consequence forming a film of a high-surface-energy noble metal on a low-surface-energy oxide substrate, which is accompanied by poor adhesion and thus a high free energy at the interface of the noble metal with the substrate. 30,31 The ability of a HMWL to suppress the 3D growth behavior of Ag on an oxide substrate can be regarded as being a direct consequence of the strong adhesion and thus good wetting of the interlayer with the oxides, probably due to either a redox reaction 32,33 or charge transfer 34,35 between the interlayer and oxides. In this respect, recently proposed techniques based on the gas-additive-mediated growth of Ag and Cu have attracted considerable attention because of their ability to suppress the 3D growth mode and thus improve the wetting ability of the target metals in the presence of trace gas additives including oxygen and nitrogen.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Silver Film Electrodes with Ultralow Optical and Electrical Losses for Flexible Organic Photovoltaics

Zhao¹,

Shen

Jeong³

et al. 2018

ACS Appl. Mater. Interfaces

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Improving the wetting ability of Ag on chemically heterogeneous oxides is technically important to fabricate ultrathin, continuous films that would facilitate the minimization of optical and electrical losses to develop qualified transparent Ag film electrodes in the state-of-the-art optoelectronic devices. This goal has yet to be attained, however, because conventional techniques to improve wetting of Ag based on heterogeneous metallic wetting layers are restricted by serious optical losses from wetting layers. Herein, we report on a simple and effective technique based on the partial oxidation of Ag nanoclusters in the early stages of Ag growth. This promotes the rapid evolution of the subsequently deposited pure Ag into a completely continuous layer on the ZnO substrate, as verified by experimental and numerical evidence. The improvement in the Ag wetting ability allows the development of a highly transparent, ultrathin (6 nm) Ag continuous film, exhibiting an average optical transmittance of 94% in the spectral range 400-800 nm and a sheet resistance of 12.5 Ω sq, which would be well-suited for application to an efficient front window electrode for flexible solar cell devices fabricated on polymer substrates.

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“…12,18 A similar structure is expected for NiO(001)/Au(001) but is not analyzed experimentally so far. Concerning Au deposition on NiO(001) substrates, it was reported that the Au grew initially in a two-dimensional (2D) mode and then took a form of 3D islands [19][20][21] and a remarkable chemical reduction of the NiO occurred at the interface. 19,21 It must be, here, noted that the growth mode a) Present address: Fuji Springs Co., Inc. 165-51, Wadayamacho, Tsutsue, Asago, 669-5265 Japan.…”

Section: Introductionmentioning

confidence: 99%

The atomic and electronic structures of NiO(001)/Au(001) interfaces

Visikovskiy

Mitsuhara

Hazama

et al. 2013

The Journal of Chemical Physics

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The atomic and electronic structures of NiO(001)∕Au(001) interfaces were analyzed by high-resolution medium energy ion scattering (MEIS) and photoelectron spectroscopy using synchrotron-radiation-light. The MEIS analysis clearly showed that O atoms were located above Au atoms at the interface and the inter-planar distance of NiO(001)∕Au(001) was derived to be 2.30 ± 0.05 Å, which was consistent with the calculations based on the density functional theory (DFT). We measured the valence band spectra and found metallic features for the NiO thickness up to 3 monolayer (ML). Relevant to the metallic features, electron energy loss analysis revealed that the bandgap for NiO(001)∕Au(001) reduced with decreasing the NiO thickness from 10 down to 5 ML. We also observed Au 4f lines consisting of surface, bulk, and interface components and found a significant electronic charge transfer from Au(001) to NiO(001). The present DFT calculations demonstrated the presence of an image charge beneath Ni atoms at the interface just like alkali-halide∕metal interface, which may be a key issue to explain the core level shift and band structure.

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Morphology and chemical activity at the Au/NiO interface

Cited by 11 publications

References 15 publications

Silver nanostructures on a c(4×2)-NiOx/Pd(100) monolayer

Silver nanostructures on a c(4×2)-NiOx/Pd(100) monolayer

Ultrathin Silver Film Electrodes with Ultralow Optical and Electrical Losses for Flexible Organic Photovoltaics

The atomic and electronic structures of NiO(001)/Au(001) interfaces

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