Electrodeposition of Noble Metals into Ordered Macropores in p-Type Silicon

Fukami, Kazuhiro; Kobayashi, Katsutoshi; Matsumoto, Taiichi; Kawamura, Yosuke; Sakka, Tetsuo; Ogata, Yukio H.

doi:10.1149/1.2898714

Cited by 72 publications

(70 citation statements)

References 29 publications

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“…Electro-deposition of Au, Pt and Pd into macro-pores has been studied [20,21]. It has shown that macro-porous silicon filling with Pd and Pt starts growing from the pore bottom.…”

Section: Introductionmentioning

confidence: 99%

“…Even if the electro-deposition process is well described in the literature [16,17,20,21], the physical properties of the obtained compound depend on fixed parameters of the sample preparation including the chemical nature of the semiconductor, crystal orientation, doping type and density, electrolyte composition and applied current or voltage. Systematic investigations with different electro-deposition parameters are required in order to find new and better physical properties.…”

Section: Introductionmentioning

confidence: 99%

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Correlation between optical properties surface morphology of porous silicon electrodeposited by Fe 3+ ion

Mabrouk

Lorrain

Haji

et al. 2015

Superlattices and Microstructures

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In this paper, we analyze the photoluminescence spectra (PL) of porous silicon (PS) layer which is elaborated by electrochemical etching and passivated by Fe 3+ ions (PSF) via current density, electro-deposition and temperature measurements. We observe unusual surface morphology of PSF surface and anomalous emission behavior. The PSF surface shows regular distribution of cracks, leaving isolated regions or "platelets" of nearly uniform thickness. These cracks become more pronounced for high current densities. The temperature dependence of the PL peak energy (E PL ) presents anomalous behaviors ,i.e., the PL peak energy shows a successive red/blue/redshift (S-shaped behavior) with increasing temperature that we attribute to the existence of strong potential fluctuations induced by the electrochemical etching of PS layers. A competition process between localized and delocalized excitons is used to discuss these PL properties. In this case, the potential confinement plays a key role on the enhancement of PL intensity in PSF. To explain the temperature dependence of the PL intensity, we have proposed a recombination model based on the tunneling and dissociation of excitons.

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“…Electro-deposition of Au, Pt and Pd into macro-pores has been studied [20,21]. It has shown that macro-porous silicon filling with Pd and Pt starts growing from the pore bottom.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Correlation between optical properties surface morphology of porous silicon electrodeposited by Fe 3+ ion

Mabrouk

Lorrain

Haji

et al. 2015

Superlattices and Microstructures

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“…4,5,6 The filling with magnetic materials allows the tuning of the resulting magnetic properties of the composite system.…”

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confidence: 99%

Morphology Controlled Magnetic Interactions in Metal Embedded Porous Silicon Nanostructures

Rumpf

Granitzer

Koshida

et al. 2015

ECS J. Solid State Sci. Technol.

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In the frame of this work porous silicon templates with different morphologies, mainly related to the roughness of the pore-walls, have been fabricated and subsequently filled with diverse ferromagnetic metals to fabricate self-assembled three dimensional arrays of nanostructures (wires, particles) with distinct magnetic properties. The fabricated templates offer a quasi-regular self-assembled pore arrangement with oriented pores. Also the pore-filling is self-assembled by electrochemical deposition and there are multiple possibilities to tailor the magnetic behavior of these systems such as material, morphology, inter particle distance or interfaces. One critical parameter for this purpose is the roughness of the pore walls and the surface of the metal structures, respectively. Within the pores of these templates ferromagnetic metals have been deposited and the modification of the magnetic properties correlated to the morphology of the different templates has been figured out. The fabrication of low-dimensional structures is a key topic in today's research, not only because of the demand of further miniaturization and integrated devices but also due to the fact that nanostructured materials offer diverse physical properties compared to their bulk materials. Various methods are used for the production of such small structures, whereas lithography is a common method to achieve regular arranged structures with a defined geometry. However, selforganization methods of pores are also of interest due to their low-costs and time-saving. Template assisted self-assembly of nanostructures is an adequate tool in order to achieve 3-dimensional arrays of nanostructures. Common templates which are employed are e.g. anodic porous alumina 1 but also porous silicon. 2 Porous silicon, formed by anodization of a silicon wafer can be fabricated with many various morphologies ranging from pore-diameters of a few nanometers up to several micrometers. To achieve arrangements of nanostructures with specific properties within the template pore diameters in the mesoporous regime are of interest.Beside the trapping of molecules within the pores of such structures 3 their filling with various metals has been investigated intensely. 4,5,6 The filling with magnetic materials allows the tuning of the resulting magnetic properties of the composite system.In the following section the filling of the pores of porous silicon templates of different morphology will be discussed, specifically, with respect to the surface texture. The electrodeposition of magnetic materials will be elucidated and the adjustability of the resulting magnetic properties will be pointed out. ExperimentalIn general porous silicon can be fabricated by wet or dry etching, whereas the most common wet methods are anodization, stain etching and metal assisted etching. In this work two methods of porous silicon formation are used, namely a "conventional" anodization and a magnetic field assisted etching. 7 Templates with pore-diameters between 30 nm and 90 nm are prepared. In th...

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“…Recently, electrodepositions of Pt, Pd, and Au in the dark have been conducted. We have investigated many factors which influence the electrodeposition behavior, such as electrolysis conditions, compositions of electrolyte, nucleation, diffusion and reaction rates [6]. In this study, we focused on the relationship between the nucleation by immersion plating and electrodeposition behavior.…”

mentioning

confidence: 99%

“…In the case of Pt, the amount of deposition in immersion plating is very small. Short time electrodeposition of Pt showed that deposition occurred only at the pore bottoms in the initial stages, and thus deposits grew from the bottoms [6]. When we consider the reason why deposition occurs preferentially at the pore bottoms, we cannot neglect the current flow path.…”

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confidence: 99%

Electrodeposition behavior of noble metals in ordered macroporous silicon

Matsumoto

Kobayashi

Fukami

et al. 2009

Phys. Status Solidi (c)

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Electrodeposition of noble metals (Pt, Pd, and Au) in ordered macropores prepared in p‐type Si under dark condition was investigated. Pt deposition proceeded continuously from the pore bottoms, and ordered micro‐rods were obtained. Pd deposition proceeded on the whole pore walls, and discontinuous micro‐tubes were obtained. Au deposition proceeded at 10‐20 μm depth from the pore openings where a high immersion plating rate was observed without applied potential, and short micro‐rods were obtained. At the pore bottoms a small amount of deposition was observed. The different behaviors of electrodeposition depending on the metals were compared and discussed. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Electrodeposition of Noble Metals into Ordered Macropores in p-Type Silicon

Cited by 72 publications

References 29 publications

Correlation between optical properties surface morphology of porous silicon electrodeposited by Fe 3+ ion

Correlation between optical properties surface morphology of porous silicon electrodeposited by Fe 3+ ion

Morphology Controlled Magnetic Interactions in Metal Embedded Porous Silicon Nanostructures

Electrodeposition behavior of noble metals in ordered macroporous silicon

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