Optimizing of Gold Nanoparticles on Porous Silicon Morphologies for a Sensitive Carbon Monoxide Gas Sensor Device

Dheyab, Amer B.; Alwan, Alwan M.; Zayer, Mehdi Q.

doi:10.1007/s11468-018-0828-x

Cited by 35 publications

(3 citation statements)

References 6 publications

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“…Au and Ag ions were reduced by the Si-Hx (x= 1, 2, 3) groups of the columns stratum. The reaction pathway is illustrated hereunder [19,20]:…”

Section: Formation Of Nano Photonics' Sers Sensormentioning

confidence: 99%

Sensing Performance of Mono and Bimetallic Nano Photonics Surface Enhanced Raman Scattering (SERS) Devices

Jubair¹,

Alwan²,

Hamoudi³

2021

ETJ

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In this research, sensing performance of mono and bimetallic nanophotonics SERS sensors of gold-silver nano-columns for the detection of chlorpyrifos was investigated. For optimum substrates for Gold-silver/nano-column surface-enhanced, Raman scattering (SERS) was achieved with the silicon substrate. By combining the Ag SERS activity with the Au chemical stability and nano-columns Si large field enhancement, the Au-Ag/nano-columns Si substrate revealed perfect reproducibility, homogeneity, sensitivity in addition to chemical stability. The sensors were tested by Atomic force microscope (AFM), field emission scanning electron microscope (FESEM), energy-dispersive X-ray analysis (EDS), and X-ray diffraction (XRD). Findings presented in this research indicated modified distributions and sizes of formed alloy nanoparticles, and the hot spots junctions within the nanophotonics layer after changing the nanoparticles types. The SERS sensors performance displayed an excellent recognition of ultra-low concentrations of chlorpyrifos solutions with an exponential relationship with the Raman signal. The highest enhancement factor (Ef=1.56×106) and minimum limit of detection 0.069 mg/Kg were obtained with Au-Ag sensors.

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“…Au and Ag ions were reduced by the Si-Hx (x= 1, 2, 3) groups of the columns stratum. The reaction pathway is illustrated hereunder [19,20]:…”

Section: Formation Of Nano Photonics' Sers Sensormentioning

confidence: 99%

Sensing Performance of Mono and Bimetallic Nano Photonics Surface Enhanced Raman Scattering (SERS) Devices

Jubair¹,

Alwan²,

Hamoudi³

2021

ETJ

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“…Thereafter, it is found that SnO 2 /p-type metal oxides hybrid sensing materials can effectively overcome some shortcomings. [14][15][16][17] Traditional MOs sensors are composed of the sensitive layer depositing on substrate Al 2 O 3 or Si, [18,19] and a miniature heater is usually installed on the back of substrate. Compared with Al 2 O 3 just only as support substrate, Si has been confirmed to be responsive to several gases.…”

Section: Introductionmentioning

confidence: 99%

Achieving highly-efficient H₂S gas sensor by flower-like SnO₂–SnO/porous GaN heterojunction

Liu

Zhang

et al. 2023

Chinese Phys. B

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A flower-like SnO2-SnO/porous GaN (FSS/PGaN) heterojunction was fabricated for the first time via a facile spraying process, the whole process also involved hydrothermal preparation of FSS and electrochemical wet etching of GaN, and SnO2-SnO composites with p-n junctions were loaded onto PGaN surface directly applied to H2S sensor. Meanwhile, the excellent transport capability of heterojunction between FSS and PGaN facilitates electron transfer, that is, a response time as short as 65 s and a release time up to 27 s can be achieved merely at 150 ℃ nder 50 ppm H2S concentration, which has laid a reasonable theoretical and experimental foundation for the subsequent PGaN-based heterojunction gas sensor. The lowering working temperature and high sensitivity (23.5 at 200 ppm H2S) are attributed to the structure of PGaN itself and the heterojunction between SnO2-SnO and PGaN. In addition, the as-obtained sensor showed ultra-high test stability. The simple design strategy of FSS/PGaN-based H2S sensor highlights its potential in various applications.

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“…It combines the advantages of porous silicon, such as a large surface area and high sensitivity, with the unique properties of metallocosides. The deposition of metals on the porous silicon layer can significantly improve the performance of sensors [23][24]. A metallocoside film can be deposited on the porous silicon surface using various methods such as sputtering, vapor deposition, or chemical methods.…”

Section: Introductionmentioning

confidence: 99%

Formation of Nanostructured Tin Oxide Film on Porous Silicon

Kim,

Lenshin,

Chyragov

et al. 2023

AChJ

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Porous silicon is actively used in the fabrication of sensors and detectors because of its large specific surface area, which is an important characteristic for gas adsorption. To improve the operating parameters of the sensors and increase the stability of operation, a film of tin oxide was deposited on the substrate of porous silicon by vacuum-thermal evaporation. The choice of tin is due to its wide forbidden zone, low cost, and high sensitivity. Porous silicon was obtained by the electrochemical anodization of single-crystalline silicon KEF (100). The data on morphology, composition and optical properties of the initial sample of porous silicon and the sample with deposited tin have been obtained by scanning electron microscopy, infrared and photoluminescence spectroscopy. It was found that the chemical tin deposition on porous silicon leads to the formation of composite structure, which significantly prevents further oxidation of the porous layer during storage, and to the shift of the luminescence band maximum

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Optimizing of Gold Nanoparticles on Porous Silicon Morphologies for a Sensitive Carbon Monoxide Gas Sensor Device

Cited by 35 publications

References 6 publications

Sensing Performance of Mono and Bimetallic Nano Photonics Surface Enhanced Raman Scattering (SERS) Devices

Sensing Performance of Mono and Bimetallic Nano Photonics Surface Enhanced Raman Scattering (SERS) Devices

Achieving highly-efficient H₂S gas sensor by flower-like SnO₂–SnO/porous GaN heterojunction

Formation of Nanostructured Tin Oxide Film on Porous Silicon

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Optimizing of Gold Nanoparticles on Porous Silicon Morphologies for a Sensitive Carbon Monoxide Gas Sensor Device

Cited by 35 publications

References 6 publications

Sensing Performance of Mono and Bimetallic Nano Photonics Surface Enhanced Raman Scattering (SERS) Devices

Sensing Performance of Mono and Bimetallic Nano Photonics Surface Enhanced Raman Scattering (SERS) Devices

Achieving highly-efficient H2S gas sensor by flower-like SnO2–SnO/porous GaN heterojunction

Formation of Nanostructured Tin Oxide Film on Porous Silicon

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Product

Resources

About

Achieving highly-efficient H₂S gas sensor by flower-like SnO₂–SnO/porous GaN heterojunction