Thermal carbonization of porous silicon surface by acetylene

Salonen, Jarno; Laine, E.; Niinistö, Lauri

doi:10.1063/1.1421221

Cited by 126 publications

(94 citation statements)

References 27 publications

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“…To improve the electrical conductivity, the as-prepared MSS material was coated with amorphous carbon using chemical vapour deposition (see Methods) 38 . The Brunauer-Emmett-Teller surface area (155.8 m 2 g À 1 ) and pore volume (0.33 cm 3 g À 1 ) of the MSS significantly decreases (Fig.…”

Section: Resultsmentioning

confidence: 99%

Mesoporous silicon sponge as an anti-pulverization structure for high-performance lithium-ion battery anodes

et al. 2014

Nat Commun

1,196

437

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Nanostructured silicon is a promising anode material for high-performance lithium-ion batteries, yet scalable synthesis of such materials, and retaining good cycling stability in high loading electrode remain significant challenges. Here we combine in-situ transmission electron microscopy and continuum media mechanical calculations to demonstrate that large (420 mm) mesoporous silicon sponge prepared by the anodization method can limit the particle volume expansion at full lithiation to B30% and prevent pulverization in bulk silicon particles. The mesoporous silicon sponge can deliver a capacity of up to B750 mAh g À 1 based on the total electrode weight with 480% capacity retention over 1,000 cycles. The first cycle irreversible capacity loss of pre-lithiated electrode is o5%. Bulk electrodes with an area-specific-capacity of B1.5 mAh cm À 2 and B92% capacity retention over 300 cycles are also demonstrated. The insight obtained from this work also provides guidance for the design of other materials that may experience large volume variation during operations.

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Section: Resultsmentioning

confidence: 99%

Mesoporous silicon sponge as an anti-pulverization structure for high-performance lithium-ion battery anodes

et al. 2014

Nat Commun

1,196

437

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“…Reaction of porous Si with gas phase acetylene generates highly carbonized porous Si that is possibly the most stable form of Si-C modified porous Si [103][104][105]. This material is referred to as thermally carbonized porous Si, or TCPSi [30].…”

Section: Chemical or Electrochemical Grafting Of Si-c Bondsmentioning

confidence: 99%

Porous silicon in drug delivery devices and materials☆

Anglin

Cheng

Freeman

et al. 2008

Advanced Drug Delivery Reviews

791

618

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Porous Si exhibits a number of properties that make it an attractive material for controlled drug delivery applications: The electrochemical synthesis allows construction of tailored pore sizes and volumes that are controllable from the scale of microns to nanometers; a number of convenient chemistries exist for the modification of porous Si surfaces that can be used to control the amount, identity, and in vivo release rate of drug payloads and the resorption rate of the porous host matrix; the material can be used as a template for organic and biopolymers, to prepare composites with a designed nanostructure; and finally, the optical properties of photonic structures prepared from this material provide a self-reporting feature that can be monitored in vivo. This paper reviews the preparation, chemistry, and properties of electrochemically prepared porous Si or SiO 2 hosts relevant to drug delivery applications.

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“…It can be performed by thermal decomposition of carboncontaining molecules such as acetylene or poly(furfuryl) alcohol on hydrogen terminated PSi surface (Salonen et al, 2002(Salonen et al, , 2004Tsang et al, 2012). At relatively low temperatures (i.e., around 500°C), acetylene gas can partially decompose and form a hydrocarbon terminated surface on PSi.…”

Section: B Porous Silicon As a Peptide Delivery Systemmentioning

confidence: 99%