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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
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Electroluminescent porous silicon
Advanced Materials, 1995Porous silicon layers with controlled structure and well‐defined surface chemical compositio and the deposition of solid contacts to form electroluminescent devices have recently been reported. The growth and characterization of the layers, several models of the morphology, and the formation processes are discussed, and the use of electrically ...
José M. Martínez‐Duart +3 more
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Il Nuovo Cimento D, 1996
The properties and preliminar applications of porous-silicon (p-Si) microcavities are here reported. These structures are based on a planar resonator formed by two narrow-band high-reflectance distributed Bragg reflectors separated by a thin active optical layer, all of which are made of p-Si layers.
Pavesi, Lorenzo +5 more
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The properties and preliminar applications of porous-silicon (p-Si) microcavities are here reported. These structures are based on a planar resonator formed by two narrow-band high-reflectance distributed Bragg reflectors separated by a thin active optical layer, all of which are made of p-Si layers.
Pavesi, Lorenzo +5 more
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AIP Conference Proceedings, 1996
A review is made in this paper on the recent advances of the photo‐ and electro‐luminescence properties of porous silicon (PS). We start by describing the electrochemical formation mechanisms of PS, followed by the most significant results obtained by different structural and chemical characterization techniques.
José M. Martínez-Duart +2 more
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A review is made in this paper on the recent advances of the photo‐ and electro‐luminescence properties of porous silicon (PS). We start by describing the electrochemical formation mechanisms of PS, followed by the most significant results obtained by different structural and chemical characterization techniques.
José M. Martínez-Duart +2 more
openaire +1 more source