Stabilization of porous silicon surface by thermal decomposition of acetylene

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

doi:10.1016/j.apsusc.2003.10.028

Cited by 143 publications

(111 citation statements)

References 22 publications

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“…The preparation and physicochemical characterization of the PSi microparticles have been described in detail in the literature. 3,12,14,15,19,22 In this study, two microsized THCPSi fractions were prepared: 1Ϫ10 and 10Ϫ25 m. The average pore diameter of these particles was 9.8 nm. The specific surface area was 322 m 2 /g, and the pore volume was 0.81 cm 3 /g.…”

Section: Resultsmentioning

confidence: 99%

Biocompatibility of Thermally Hydrocarbonized Porous Silicon Nanoparticles and their Biodistribution in Rats

et al. 2010

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Porous silicon (PSi) particles have been studied for the effects they elicit in Caco-2 and RAW 264.7 macrophage cells in terms of toxicity, oxidative stress, and inflammatory response. The most suitable particles were then functionalized with a novel 18 F label to assess their biodistribution after enteral and parenteral administration in a rat model. The results show that thermally hydrocarbonized porous silicon (THCPSi) nanoparticles did not induce any significant toxicity, oxidative stress, or inflammatory response in Caco-2 and RAW 264.7 macrophage cells. Fluorescently labeled nanoparticles were associated with the cells surface but were not extensively internalized. Biodistribution studies in rats using novel 18 F-labeled THCPSi nanoparticles demonstrated that the particles passed intact through the gastrointestinal tract after oral administration and were also not absorbed from a subcutaneous deposit. After intravenous administration, the particles were found mainly in the liver and spleen, indicating rapid removal from the circulation. Overall, these silicon-based nanosystems exhibit excellent in vivo stability, low cytotoxicity, and nonimmunogenic profiles, ideal for oral drug delivery purposes.

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Section: Resultsmentioning

confidence: 99%

Biocompatibility of Thermally Hydrocarbonized Porous Silicon Nanoparticles and their Biodistribution in Rats

et al. 2010

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“…Standard PSi passivation strategies are mostly based on thermal oxidation or wet chemistry: the best results, in terms of chemical stability, have been obtained by silanization and hydrothermal carbonization [18,19]. In the past, dry technologies have been scarcely used: few attempts have been made in PSi surface modification using evaporation or plasma deposition [20], as it is not straightforward obtaining uniform coverage of a complex surface such as disordered microporous silicon.…”

Section: Resultsmentioning

confidence: 99%

Hybrid organic–inorganic porous semiconductor transducer for multi-parameters sensing

Caliò

Cassinese

Casalino³

et al. 2015

J. R. Soc. Interface.

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Porous silicon (PSi) non-symmetric multi-layers are modified by organic molecular beam deposition of an organic semiconductor, namely the N,N 0 -1H,1H-perfluorobutyldicyanoperylene-carboxydi-imide (PDIF-CN 2 ). Joule evaporation of PDIF-CN 2 into the PSi sponge-like matrix not only improves but also adds transducing skills, making this solid-state device a dual signal sensor for chemical monitoring. PDIF-CN 2 modified PSi optical microcavities show an increase of about five orders of magnitude in electric current with respect to the same bare device. This feature can be used to sense volatile substances. PDIF-CN 2 also improves chemical resistance of PSi against alkaline and acid corrosion.

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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%