Porous silicon membranes and their applications: Recent advances

Vercauteren, Roselien; Scheen, Gilles; Raskin, Jean‐Pierre; Francis, Laurent

doi:10.1016/j.sna.2020.112486

Cited by 47 publications

(20 citation statements)

References 163 publications

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“…Another approach to increase the sensitivity of PSi biosensor is the fabrication of PSi membranes (PSiMs). Instead of a close-ended PSi layer over which the analyte must flow, an open-ended PSi membrane allows the analyte to flow through the porous matrix [32]. PSi membranes have been fabricated as early as the 1990s [33], but the interest in PSiMs for sensing applications only arose recently [34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Porous Silicon Biosensor for the Detection of Bacteria through Their Lysate

Vercauteren¹,

Leprince

Mahillon

et al. 2021

Biosensors

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Porous silicon (PSi) has been widely used as a biosensor in recent years due to its large surface area and its optical properties. Most PSi biosensors consist in close-ended porous layers, and, because of the diffusion-limited infiltration of the analyte, they lack sensitivity and speed of response. In order to overcome these shortcomings, PSi membranes (PSiMs) have been fabricated using electrochemical etching and standard microfabrication techniques. In this work, PSiMs have been used for the optical detection of Bacillus cereus lysate. Before detection, the bacteria are selectively lysed by PlyB221, an endolysin encoded by the bacteriophage Deep-Blue targeting B. cereus. The detection relies on the infiltration of bacterial lysate inside the membrane, which induces a shift of the effective optical thickness. The biosensor was able to detect a B. cereus bacterial lysate, with an initial bacteria concentration of 105 colony forming units per mL (CFU/mL), in only 1 h. This proof-of-concept also illustrates the specificity of the lysis before detection. Not only does this detection platform enable the fast detection of bacteria, but the same technique can be extended to other bacteria using selective lysis, as demonstrated by the detection of Staphylococcus epidermidis, selectively lysed by lysostaphin.

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Section: Introductionmentioning

confidence: 99%

Porous Silicon Biosensor for the Detection of Bacteria through Their Lysate

Vercauteren¹,

Leprince

Mahillon

et al. 2021

Biosensors

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“…The X-ray Diffraction for same solution in figure (5), From this figure, the porous silicon signal can be observed very clearly, and that was at 15 minutes, As for the 20 minutes, the formation of a new porous layer started after removing the formed layer at 15 minutes, So this shape close to the bulk silicon because a new etching process is taking place at this moment 19 One can notice this in figure (6).…”

Section: Resultsmentioning

confidence: 75%

“…The silicon wafer was cutting into dimensions (1.5*1.4)cm. These pieces were laundering with ethanol to remove dirt by mixture ethanol and HF acid (10%) by utilizing the systematic -figure (1)makes porous silicon with electro chemical etching for p-type bulk silicon with different time (5,10,15,20,25 and 30) min, and the last solution is HNO 3 and salt. After that, The sample is quickly rinsed with ionized water and let to air-dry for a few minutes.…”

Section: Materials and Methodologymentioning

confidence: 99%

The effective of time etching and different acids on the morphological porous silicon

Al-Jubouri

Salman²,

Al-Kadumi³

2022

IOP Conf. Ser.: Earth Environ. Sci.

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This paper study the characteristics of nano crystalline silicon prepared with the use of electrochemical etching with etching time (15,20) min for salt and Nitric acid (HNO3) and etching time (15,20) min for Ethanol and Hydrofluoric acid, and study the effect of this solutions on the characteristics of porous silicon (ps) will be produced by electrochemical etching by using electrochemical etching from p-type bulk silicon with resistivity (1-10 Ω.cm) with different time. after that, make a comparison for the morphological properties for porous silicon. Research employing X-ray diffraction and scanning electron microscopy instruments were also performed on the samples that were produced as a result. Micromachining etching uses electrochemical etching of silicon in HF solution. New wafer-etched structures are reported. Wall arrays, hole arrays, meander-shaped structures, spiral-like walls, microtubes, and more are produced. The electrochemical etch process and KOH etching time of the original pattern on final geometries are modelled.

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“…An important aspect for gas microsensors is the possibility to create integrated structures based on porous silicon, which contain a gas-transport and a gas-sensitive layers separated by a dielectric layer of silicon dioxide [11,12]. This paper shows the possibility to create a test structure of a flow-type resistive gas sensor based on macroporous silicon layers, which comprises integrated gas-permeable and gassensitive layers.…”

Section: Introductionmentioning

confidence: 99%

Multilayer sensor structure based on porous silicon

et al. 2022

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The work is devoted to the creation of a sensor structure based on a porous silicon membrane. The structure under study integrates a porous layer used as a gas transport layer and a gas sensitive layer of non-stoichiometric tin oxide. The paper investigates the morphology of the structure and shows the gas permeability of the membrane on porous silicon. The gas sensitivity of the test structure obtained by passing a gas-air mixture containing NO2 has been studied. Keywords: porous silicon, membrane, non-stoichiometric tin oxide, thin films, resistive gas sensor.

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Porous silicon membranes and their applications: Recent advances

Cited by 47 publications

References 163 publications

Porous Silicon Biosensor for the Detection of Bacteria through Their Lysate

Porous Silicon Biosensor for the Detection of Bacteria through Their Lysate

The effective of time etching and different acids on the morphological porous silicon

Multilayer sensor structure based on porous silicon

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