Smoothing of ultrathin silver films by transition metal seeding

Anders, André; Byon, Eungsun; Kim, Dongho; Fukuda, Kentaro; Lim, Sunnie H.N.

doi:10.1016/j.ssc.2006.08.027

Cited by 69 publications

(47 citation statements)

References 9 publications

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“…9 Therefore, various methods for the 2-D growth and the inhibition of agglomeration in Ag thin films have been suggested. [10][11][12][13] One of the solutions is to deposit an interlayer (Al, Ni-Cr, Ti, Nb, etc.) in order to reduce the interfacial energy, which is effective to some extent, but the interlayer degrades the transparency in the visible spectral range.…”

Section: Introductionmentioning

confidence: 99%

Low emissivity Ag/Ta/glass multilayer thin films deposited by sputtering

Park

Lee

Reddy

2011

Journal of Applied Physics

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Ta is deposited on a glass substrate as an interlayer for the two-dimensional growth of Ag thin films because Ta has good thermal stability and can induce a negative surface-energy change in Ag/glass. From the transmission electron microscopy results, we concluded that the Ag crystals in the bottom layer (seemingly on Ag/Ta) were flattened; this was rarely observed in the three-dimensional growth mode. Comparing Ag/Ta/glass with Ag/glass, we found that the Ta interlayer was effective in reducing both the resistance and the emissivity, accompanied by the relatively high transmittance in the visible region. In particular, Ag(9 nm)/Ta(1 nm)/glass film showed 0.08 of the emissivity, including $61% of the transmittance in the visible region (wavelength: 550 nm).

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Section: Introductionmentioning

confidence: 99%

Low emissivity Ag/Ta/glass multilayer thin films deposited by sputtering

Park

Lee

Reddy

2011

Journal of Applied Physics

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“…At thickness above 12 nm the particles begin to form an extended network of conducting particles or a continuous film. [47] The SERS EF versus AgIF thickness plot (Figure 6 b) obtained on 514.5 nm excitation with glass as the substrate has a plateau value of~1. 1 10 6 at AgIF thickness region 6-9 nm and drastically decreases to 9.4 10 4 at 18 nm.…”

Section: Resultsmentioning

confidence: 97%

Multilayer Substrate‐Mediated Tuning Resonance of Plasmon and SERS EF of Nanostructured Silver

Shoute¹

2010

ChemPhysChem

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A thin-film of dielectric on a reflecting surface constituting a multilayer substrate modulates light intensity due to the interference effect. A nanostructure consisting of randomly oriented silver particles of different shapes, sizes, and interparticle spacings supports multiple plasmon resonances and is observed to have a broad extinction spectrum that spans the entire visible region. Combining the two systems by fabricating the nanostructure on the thin-dielectric film of the multilayer substrate yields a new composite structure which is observed to modulate both the extinction spectrum and the SERS EF (surface enhanced Raman scattering enhancement factor) of the nanostructure as the thickness of the thin-film dielectric is varied. The frequency and intensity of the visible extinction spectrum vary dramatically with the dielectric thickness and in the intermediate thickness range the spectrum has no visible band. The SERS EF determined for the composite structure as a function of the thin-film dielectric thickness varies by several orders of magnitude. Strong correlation between the magnitude of the SERS EF and the extinction intensity is observed over the entire dielectric thickness range indicating that the extinction spectrum corresponds to the excitation of the plasmon resonances of the nanostructure. A significant finding which has potential applications is that the composite structure has synergic effect to boost SERS EF of the nanostructure by an order of magnitude or more compared to the same nanostructure on an unlayered substrate.

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“…For a-C, the energetic carbon ions from cathodic arc discharging smoothed the surface by re-sputtering and diffusion effects. The 3D-growth of silver content also has the smoothing effect [11]; therefore a-C/Ag had the lowest roughness because of the combined smoothing mechanisms. The RMS roughness values of all samples are summarized in Fig.…”

Section: Resultsmentioning

confidence: 99%

Modification of Surface and Tribological Properties of DLC Films by Adding Silver Content

Zhang

Endrino

Anders

2008

STLE/ASME 2008 International Joint Tribology Conference

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The incorporation of silver into the diamond-like carbon (DLC) coatings has shown excellent potential in various applications; therefore the surface and tribological properties of silver-containing DLC thin films deserve to be investigated. In this study we have deposited silver-containing hydrogenated and hydrogen-free DLC coatings by plasma immersion ion implantation and deposition (PIII-D) methods. Atomic force microscopy (AFM) and nano-scratch tests were used to study the surface and tribological properties. The silver incorporation had only slight effects on hydrogenated DLC coatings. However, the incorporation of silver has significant effect on hydrogen-free DLC of smoothing the surface and increasing the surface energy. Those effects have been illustrated and explained in the context of experimental results. INTRODUCTIONWhile the effect of adding silver to DLC coatings has been tested to be beneficial in a variety of applications [1][2][3][4][5][6][7][8], the tribological properties of these films are not yet completely understood. In order to justify the application of silvercontaining DLC coatings in various applications, surface analysis and tribological property characterization were carried out for silver-containing DLC coatings deposited by PIII-D methods. In the previous work the composition, microstructure, mechanical and biological properties of DLC-Ag samples have been characterized in details [1]; this manuscript focuses on the surface characteristics of DLC-Ag coatings. The notation of a-C:H and a-C are referred to hydrogenated and hydrogen-free DLC; the corresponding silver-containing samples are referred to a-C:H/Ag and a-C/Ag. AFM was used to image the coatings' surface topography. Mechanical tests of nano-scratch were carried out to characterize the coatings' tribological properties.

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Smoothing of ultrathin silver films by transition metal seeding

Cited by 69 publications

References 9 publications

Low emissivity Ag/Ta/glass multilayer thin films deposited by sputtering

Low emissivity Ag/Ta/glass multilayer thin films deposited by sputtering

Multilayer Substrate‐Mediated Tuning Resonance of Plasmon and SERS EF of Nanostructured Silver

Modification of Surface and Tribological Properties of DLC Films by Adding Silver Content

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