Theoretical studies of displacement deposition of nickel into porous silicon with ultrahigh aspect ratio

Xu, Changhao; Li, Mingheng; Zhang, Xi; Tu, King‐Ning; Xie, Ya‐Hong

doi:10.1016/j.electacta.2006.11.007

Cited by 12 publications

(13 citation statements)

References 59 publications

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“…Therefore, the electroplating voltage decreased. This phenomenon was similar to the findings of a previous research, where nickel ions were electrodeposited into the ultra-high aspect ratio porous silicon (Xu et al 2007). The current density decreased because of the increased surface area.…”

Section: Resultssupporting

confidence: 86%

One-step electroplating 3D template with gradient height to enhance micromixing in microfluidic chips

Xiao

Zhang

et al. 2015

Microfluid Nanofluid

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Section: Resultssupporting

confidence: 86%

One-step electroplating 3D template with gradient height to enhance micromixing in microfluidic chips

Xiao

Zhang

et al. 2015

Microfluid Nanofluid

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“…Many works deal with the deposition (electrochemical or electroless) of ferromagnetic metals into non-magnetic templates, such as porous alumina [ 50 , 51 , 52 ] and porous silicon [ 53 , 54 ] to fabricate arrays of elongated nanostructures and nanowires. The formation of Ni nanotubes has been reported by Ogata et al .…”

Section: Resultsmentioning

confidence: 99%

Magnetic Nanoparticles Embedded in a Silicon Matrix

Granitzer

Rumpf

2011

Materials

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This paper represents a short overview of nanocomposites consisting of magnetic nanoparticles incorporated into the pores of a porous silicon matrix by two different methods. On the one hand, nickel is electrochemically deposited whereas the nanoparticles are precipitated on the pore walls. The size of these particles is between 2 and 6 nm. These particles cover the pore walls and form a tube-like arrangement. On the other hand, rather well monodispersed iron oxide nanoparticles, of 5 and 8 nm respectively, are infiltrated into the pores. From their size the particles would be superparamagnetic if isolated but due to magnetic interactions between them, ordering of magnetic moments occurs below a blocking temperature and thus the composite system displays a ferromagnetic behavior. This transition temperature of the nanocomposite can be varied by changing the filling factor of the particles within the pores. Thus samples with magnetic properties which are variable in a broad range can be achieved, which renders this composite system interesting not only for basic research but also for applications, especially because of the silicon base material which makes it possible for today’s process technology.

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“…In our fluoride, containing alkaline aqueous electrolyte without reducing agent, the electron exchange is basically accomplished between sidewall Si atoms and solution Ni 2+ ions although the detailed mechanism is more complicated [15,16,17]. In other words, Ni is deposited at the expense of Si through fluoridation and dissolution, also known as displacement reaction.…”

Section: Resultsmentioning

confidence: 99%

Study of Ni Metallization in Macroporous Si Using Wet Chemistry for Radio Frequency Cross-Talk Isolation in Mixed Signal Integrated Circuits

Zhang

Chong

et al. 2011

Materials

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A highly conductive moat or Faraday cage of through-the-wafer thickness in Si substrate was proposed to be effective in shielding electromagnetic interference thereby reducing radio frequency (RF) cross-talk in high performance mixed signal integrated circuits. Such a structure was realized by metallization of selected ultra-high-aspect-ratio macroporous regions that were electrochemically etched in p− Si substrates. The metallization process was conducted by means of wet chemistry in an alkaline aqueous solution containing Ni2+ without reducing agent. It is found that at elevated temperature during immersion, Ni2+ was rapidly reduced and deposited into macroporous Si and a conformal metallization of the macropore sidewalls was obtained in a way that the entire porous Si framework was converted to Ni. A conductive moat was as a result incorporated into p− Si substrate. The experimentally measured reduction of crosstalk in this structure is 5~18 dB at frequencies up to 35 GHz.

show abstract

Theoretical studies of displacement deposition of nickel into porous silicon with ultrahigh aspect ratio

Cited by 12 publications

References 59 publications

One-step electroplating 3D template with gradient height to enhance micromixing in microfluidic chips

One-step electroplating 3D template with gradient height to enhance micromixing in microfluidic chips

Magnetic Nanoparticles Embedded in a Silicon Matrix

Study of Ni Metallization in Macroporous Si Using Wet Chemistry for Radio Frequency Cross-Talk Isolation in Mixed Signal Integrated Circuits

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