In situ inclusion of Au nanoparticles in porous silicon structure

Severiano, F.; Gayou, V. L.; García, Gregorio Gómez-Jarabo; Delgado-Macuil, R.; Martínez‐Gutiérrez, Hugo; Nieto, G.; Díaz, T.

doi:10.1007/s00339-016-0718-z

Cited by 5 publications

(7 citation statements)

References 20 publications

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“…PS is obtained by chemical etching using chloroauric acid (HAuCl 4 ) in the electrolyte, considering a simple and alternative method to conventional methods (cathodic spraying, chemical vapor deposition, electrodeposition, electrolysis) [17]. This technique is based on localized oxidation, reduction of reactions under open circuit and dissolution of silicon (Si) in hydrofluoric acid (HF) while metal (usually a noble metal) catalytically improves the process of engraving [18].…”

Section: Introductionmentioning

confidence: 99%

Optical biosensor for biogenic amines detection used a porous silicon matrix

Rozo

Carrillo

Gayou

et al. 2020

Supl. Rev. Mex. Fis.

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The content of biogenic amines has been studied due to the toxicity of these compounds in humans when are consumed exogenously, and is used as an indicator of quality in the food industry. The manly method for its determination is high performance liquid chromatography. However, it requires a long time for analysis. An alternative method is the use of biosensors, porous silicon with gold nanoparticles were obtained by electrochemical attack assisted with metal salt. These substrates were used for the construction of a biosensor capable of detecting BA using diamine oxidase enzyme as an element of biological recognition and is binding using the self-assembled monolayers method. The correlation between scanning electron microscopy, X-ray dispersive energy spectroscopy, and Fourier Transform infrared spectroscopy analysis, demonstrated the correct construction of the biosensor and the detection of biogenic amines by interaction with the enzyme. Finally, with the built biosensor it was possible to detect three important biogenic amines found in food.

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Section: Introductionmentioning

confidence: 99%

Optical biosensor for biogenic amines detection used a porous silicon matrix

Rozo

Carrillo

Gayou

et al. 2020

Supl. Rev. Mex. Fis.

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“…In recent years, porous Si has been widely used in many applications because of its excellent photoelectric properties and chemical properties, such as biological sensors [ 17 , 25 ], solar cell [ 26 ], biomedical devices [ 27 ], and catalysis [ 28 ]. The porosity of the material is controlled by varying the anodization current density, and the pore length is controlled by varying the time of etching for a certain etchant at constant temperature [ 29 ]. The pore diameter and surface morphology can also be tuned by varying the etching parameters and the Si wafer type.…”

Section: Introductionmentioning

confidence: 99%

Porous Silicon Photonic Crystals Coated with Ag Nanoparticles as Efficient Substrates for Detecting Trace Explosives Using SERS

Zhong

Guo

et al. 2018

Nanomaterials

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Picric acid (PA) is an organic substance widely used in industry and military, which poses a great threat to the environment and security due to its unstable, toxic, and explosive properties. Trace detection of PA is also a challenging task because of its highly acidic and anionic character. In this work, silver nanoparticles (AgNPs)-decorated porous silicon photonic crystals (PS PCs) were controllably prepared as surface-enhanced Raman scattering (SERS) substrates using the immersion plating solution. PA and Rhodamine 6G dye (R6G) were used as the analyte to explore the detection performance. As compared with single layer porous silicon, the enhancement factor of PS PCs substrates is increased to 3.58 times at the concentration of 10−6 mol/L (R6G). This additional enhancement was greatly beneficial to the trace-amount-detection of target molecules. Under the optimized assay condition, the platform shows a distinguished sensitivity with the limit of detection of PA as low as 10−8 mol/L, the linear range from 10−4 to 10−7 mol/L, and a decent reproducibility with a relative standard deviation (RSD) of ca. 8%. These results show that the AgNPs-modified PS PCs substrates could also find further applications in biomedical and environmental sensing.

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“…This technique is similar to the commonly used electrochemical attack in the PS manufacturing; but, in this process, using metal salt in the electrolyte. Additionally, it allows the tuning of the properties in PS with physical parameters (thickness, pore diameter, and doping level) [14]. Thickness can be controlled through the etching time; pore diameter is controlled by the used electrolyte; and doping level is controlled by the amount of metal salt supplied [14].…”

Section: Global Journal Of Nanomedicinementioning

confidence: 99%

“…Additionally, it allows the tuning of the properties in PS with physical parameters (thickness, pore diameter, and doping level) [14]. Thickness can be controlled through the etching time; pore diameter is controlled by the used electrolyte; and doping level is controlled by the amount of metal salt supplied [14]. The size of the gold nanoparticles can be around 20 nm and the pore size around 1.5 µm.…”

Section: Global Journal Of Nanomedicinementioning

confidence: 99%

“…With help of SEM analysis can be demonstrate the incorporation of Au nanoparticles in PS structure, Figure 1, and X-ray energy dispersive spectroscopy (EDS) can confirm the introduction of gold nanoparticles. Raman spectroscopy obtained from PS and PS/Au samples, Figure 2, show an increment of the intensity which can be related to the surface enhancement originated by the Au presence in the surface [14,15]. This effect is very important in the amine detection process due to the increment of the signals related with the enzymatic reaction used to sensing the quantity of AB in food.…”

Section: Global Journal Of Nanomedicinementioning

confidence: 99%

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Potential of Porous Silicon Doped With Gold Nanoparticles in Detection of Biogenic Amine. Porous Silicon Used in the Detection of Biogenic Amines

Carrillo¹

2017

GJN

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Due to its properties porous silicon is a material with high potential to be applied in bio-delivery carriers and biosensors. To enhancement the capacity of porous silicon as biosensor, gold nanoparticles are introduced in its structure. One of the most used methods to obtain porous silicon/Au nanoparticles is metal salt-assisted chemical etching. The high surface of porous silicon matrix and the Au nanoparticles allow the increment of the sensitivity of the biosensor. This structure can be use as platform to got a biogenic amine optic biosensors. This kind of sensors (optic) are based on the changes of the signals related to the reactions between biogenic amines and the recognized element used (diamine oxidase).

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In situ inclusion of Au nanoparticles in porous silicon structure

Cited by 5 publications

References 20 publications

Optical biosensor for biogenic amines detection used a porous silicon matrix

Optical biosensor for biogenic amines detection used a porous silicon matrix

Porous Silicon Photonic Crystals Coated with Ag Nanoparticles as Efficient Substrates for Detecting Trace Explosives Using SERS

Potential of Porous Silicon Doped With Gold Nanoparticles in Detection of Biogenic Amine. Porous Silicon Used in the Detection of Biogenic Amines

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