A new approach of pH-IEGFET sensor based on the surface modification of macro porous silicon with palladium nanoparticles

Alwan, Alwan M.; Wali, Layla A.; Zayer, Mehdi Q.

doi:10.1007/s11082-020-02346-0

Cited by 12 publications

(4 citation statements)

References 24 publications

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“…All XRD patterns displayed diffraction peaks at 32.8°, 38.5°, 44.7°, 65.1°, 69.2°, 72.6°, 78.3° and 88.4°. These diffraction peaks are ascribed to the Si crystalline structure 32,33 , except for two low-intensity peaks at 65.1°and 72.6° that may be related to SiO 2 [PDF#00-001-0438] due to the possible oxidation during samples transfer. The highest peak shown at 2θ = 69.2° in each substrates is attributed to Si structure and the presence of this peak in all substrates suggests that the cubic structure of the crystallized Si is preserved even after the pore creation into the Si wafer 34 .…”

Section: Resultsmentioning

confidence: 99%

Immersion-plated palladium nanoparticles onto meso-porous silicon layer as novel SERS substrate for sensitive detection of imidacloprid pesticide

Al-Syadi

Faisal

Harraz

et al. 2021

Sci Rep

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Herein, we demonstrate the effectiveness of surface-enhanced Raman scattering (SERS) to detect trace concentration of potentially harmful imidacloprid pesticide. To achieve this ultimate objective, a rapid and highly effective methodology for the fabrication of active and stable porous silicon (PSi) plated palladium nanoparticles (PdNPs) SERS substrates by an electrochemical anodization and immersion plating routes was applied. The PSi layers were fabricated by the electrochemical anodization of a silicon wafer in ethanoic fluoride solution, followed by uniformly deposition of PdNPs via a simple immersion plating technique. The structural features and morphology of fabricated frameworks of PSi-Pd NPs have been investigated by field emission scanning electron microscopy (FE-SEM) with energy dispersive X-ray (EDX), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FT-IR) spectra. The PSi substrate demonstrates a meso-porous morphology with good distribution, good pore density and average pore sizes around 20 nm. The SERS performance of Si–Pd NPs and PSi–Pd NPs substrates has been examined taking imidacloprid (an insecticide) as a target analyte. The SERS signal of imidacloprid using PSi–Pd NPs substrate exhibited immense enhancement compared to the Si-Pd NPs substrate. The active substrate revealed excellent detectable performance with a concentration as low as 10–9 M imidacloprid and an enhancement factor (EF) of 1.2 × 105. This large EF is fundamentally ascribed to the combined effect of the electromagnetic improvement and charge transfer mechanisms. Additionally, no aging effect was observed for the present substrates kept in air for two weeks. Striking enhancement in Raman spectral signals obtained with the current PSi–Pd NPs substrates can provide a simple and smooth platform towards the sensitive detection of various target analytes.

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Section: Resultsmentioning

confidence: 99%

Immersion-plated palladium nanoparticles onto meso-porous silicon layer as novel SERS substrate for sensitive detection of imidacloprid pesticide

Al-Syadi

Faisal

Harraz

et al. 2021

Sci Rep

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“…Several approaches have been considered by researchers to reduce this blistering effect by utilizing Pd nanostructures [42]. It has been reported by several researchers that the Pd nanostructure provides an improved sensing response compared to the Pd film, due to its high surface-to-volume ratio, which induces a large surface available for the interaction of Pd with surrounding hydrogen molecules [43][44][45][46][47].…”

Section: Measurement Methodsmentioning

confidence: 99%

Recent Advances in Optical Hydrogen Sensor including Use of Metal and Metal Alloys: A Review

et al. 2023

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Optical sensing technologies for hydrogen monitoring are of increasing importance in connection with the development and expanded use of hydrogen and for transition to the hydrogen economy. The past decades have witnessed a rapid development of optical sensors for hydrogen monitoring due to their excellent features of being immune to electromagnetic interference, highly sensitive, and widely applicable to a broad range of applications including gas sensing at the sub-ppm range. However, the selection of hydrogen selective metal and metal alloy plays an important role. Considering the major advancements in the field of optical sensing technologies, this review aims to provide an overview of the recent progress in hydrogen monitoring. Additionally, this review highlights the sensing principles, advantages, limitations, and future development.

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“…Thus far, several techniques have been employed to enhance the conductivity of sensing membrane, which include doping with a variety of elements or surface decoration of nanostructures with noble metal particles [23,24]. In recent times, the sensitivity of the pH-EGFET sensor has been significantly enhanced by surface decoration of N-MacroPSi with palladium nanoparticles (Pd-NPs) [25]. A colloidal solution of metallic nanoparticles can be made by means of pulsed laser ablation in liquid (PLAL) technique.…”

Section: Introductionmentioning

confidence: 99%

pH‑EGFET Sensor Based on the Surface Modification of MacroPSi with Au-NPs

Slewa

Sabah²,

Gozeh

et al. 2022

Silicon

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A heterostructure of (Au-NPs/MacroPSi) was synthesized by filtering a colloidal of gold nanoparticles (Au-NPs) into MacroPSi layer using high voltage electrophoretic deposition (HVEPD). The aim of that is to enhance the performance of MacroPSi used as a pH-EGFET sensor. For this purpose, the MacroPSi with an average pore size of 1.388 μm was synthesized by anodic etching of Si wafer, and a spherical shape of Au-NPs with size varied in the range of 5 to 25 nm were synthesized in ethanol by pulsed laser ablation in liquid (PLAL) technique. The density of (Au-NPs) on the surface and inside the pores of MacroPSi was determined utilizing FESEM. The pH sensitivity, linearity, and hysteresis of the heterostructure Au-NPs/MacroPSi pH-EGFET sensor were measured in the pH range from 2 to 12. The outcomes indicated that the membrane exhibited a significantly enhanced pH sensitivity value of 83.57 mV/pH with linear regression of 99.37%, and hysteresis of 3 mV and 5 mV in the acid and base pH cycles, respectively. The presence of Au-NPs improve the sensitivity and stability of the sensor due to deactivate of the Si-h surface bond and enhancement the conducting on the surface of MacroPSi, and also provide better Ohmic contact to the PSi. The research work confirms the feasibility of using the hetero structures (Au-NPs/MacroPSi) as extended get for acidity and basicity detection.

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A new approach of pH-IEGFET sensor based on the surface modification of macro porous silicon with palladium nanoparticles

Cited by 12 publications

References 24 publications

Immersion-plated palladium nanoparticles onto meso-porous silicon layer as novel SERS substrate for sensitive detection of imidacloprid pesticide

Immersion-plated palladium nanoparticles onto meso-porous silicon layer as novel SERS substrate for sensitive detection of imidacloprid pesticide

Recent Advances in Optical Hydrogen Sensor including Use of Metal and Metal Alloys: A Review

pH‑EGFET Sensor Based on the Surface Modification of MacroPSi with Au-NPs

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