Results 251 to 260 of about 172,894 (301)
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Passivated Luminescent Porous Silicon
Journal of The Electrochemical Society, 2001Freshly prepared porous silicon (PSi) surfaces have been modified with different organic molecules such as alkenes (1-decene, ethyl undecylenate) and nonconjugated dienes (1,7-octadiene) in a thermal process to yield organic monolayers covalently attached to the surface through Si-C bonds.
Boukherroub, R. +3 more
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Photoactive Porous Silicon Nanopowder
ACS Applied Materials & Interfaces, 2013Bulk processing of porous silicon nanoparticles (nSi) of 50-300 nm size and surface area of 25-230 m(2)/g has been developed using a combustion synthesis method. nSi exhibits consistent photoresponse to AM 1.5 simulated solar excitation. In confirmation of photoactivity, the films of nSi exhibit prompt bleaching following femtosecond laser pulse ...
Benjamin H, Meekins +6 more
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Comparison of experimental porous silicone implants and porous silicone implants
Graefe's Archive for Clinical and Experimental Ophthalmology, 2011To investigate the extent and pattern of fibrovascular ingrowth of porous silicone sphere implants compared to porous polyethylene implants.Experimental porous silicone sphere implants and porous polyethylene implants were implanted in the left socket of 20 New Zealand white rabbits after enucleation. Fibrovascular ingrowth and maturation was evaluated
JunHyuk, Son +2 more
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Porous Silicon from Hydrogenated Amorphous Silicon: Comparison with Crystalline Porous Silicon
MRS Proceedings, 1996AbstractDevice-grade, boron-doped amorphous hydrogenated silicon can be made microporous by anodization in ethanoic HF. The thickness of the porous layer is limited by an instability due to the high resistivity of the material. Amorphous porous silicon exhibits strong room-temperature photoluminescence around 1.5 eV even in samples containing a high ...
J.-N. Chazalviel +3 more
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Protein‐Modified Porous Silicon Nanostructures
Advanced Materials, 2008Biological passivation of porous silicon (PSi)-based optical devices is demonstrated. Infiltration by small amphiphilic fungal proteins called HFBs changes the wettability of the PSi surface (see figure) and protects the sponge-like structure against dissolution by basic solutions.
De Stefano L +4 more
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Biocompatibility of Porous Silicon
2014The biocompatibility of porous silicon is critical to its potential biomedical uses, both in vivo within the human body for therapy and diagnostics, and in vitro for biosensing and biofiltration. Published data from cell culture and in vivo studies are reviewed, and a number of emerging applications for bioactive or biodegradable silicon are discussed.
Suet P. Low, Nicolas H. Voelcker
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Silicon needles in porous silicon
Thin Solid Films, 1996Abstract A model is presented which explains the high degree of linear polarization of luminescence which was observed in porous silicon under non-resonant excitation. Porous silicon is supposed to be composed of elongated nanocrystals. We show that because of the anisotropy of the depolarizing field in silicon needles polarized light excites ...
P Lavallard, R.A Suris
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Luminescent Colloidal Silicon Suspensions from Porous Silicon
Science, 1992A procedure for generating colloidal suspensions of Si that exhibit luminescence, attributed to quantum confinement effects, is described. Samples of n - or p -type Si that have been electrochemically etched to form porous Si can be ultrasonically dispersed into methylene chloride ...
J L, Heinrich +4 more
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Materials Science and Engineering: B, 2000
We report on the collapse of porous silicon on the nanometer scale observed during a study of freeze dried low doped p-type samples. During the drying process highly porous layers, about 4 μm in depth, changed their colour from an initial bright brown to a well defined green at the end of the procedure. However, the mirror aspect of the sample was kept.
Lerondel G +3 more
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We report on the collapse of porous silicon on the nanometer scale observed during a study of freeze dried low doped p-type samples. During the drying process highly porous layers, about 4 μm in depth, changed their colour from an initial bright brown to a well defined green at the end of the procedure. However, the mirror aspect of the sample was kept.
Lerondel G +3 more
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SPIE Proceedings, 1993
The porous silicon photodetector shows high band and high sensitivity properties. The porous silicon layer being the top layer of porous silicon photodetector, and the pore size distribution of porous silicon result in high band detectivity. Various porosities corresponding to various silicon wires would respond to various wavelengths of incident ...
Ming K. Lee, K. R. Peng, C. H. Chu
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The porous silicon photodetector shows high band and high sensitivity properties. The porous silicon layer being the top layer of porous silicon photodetector, and the pore size distribution of porous silicon result in high band detectivity. Various porosities corresponding to various silicon wires would respond to various wavelengths of incident ...
Ming K. Lee, K. R. Peng, C. H. Chu
openaire +1 more source