Study of the Influence of Incorporation of Gold Nanoparticles on the Modified Porous Silicon Sensor for Petroleum Gas Detection

Alwan, A. M.; Dheyab, Amer B.; Allaa, A.J.

doi:10.30684/etj.35.8a.4

Cited by 30 publications

(4 citation statements)

References 8 publications

(12 reference statements)

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“…Also, the XRD pattern of the hybrid structure shows the diffraction peaks at 26.2, 44.4, and 64.44, which can be related to (002). ( 111), ( 200) and (220) plane [49]. This outcome is reasonably consistent with the results presented in the data JCPDS card 96-101-1061 (PSi) JCPDS-ICDD card no.04-802 (MWCNT) JCPDS card 27-1402 (AgNPs) .…”

Section: Resultssupporting

confidence: 91%

New approach of creation and modifying the characteristics of AgNPs/MWCNT/PSi hybrid structures

Ali,

Alwan,

Jabbar

2023

Preprint

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In this paper presents a new approach in modifying the properties of hybrid structures of silver nanoparticles (AgNPs) and multi wall carbon nanotubes (MWCNT); deposited on morphologically controlled porous silicon (PSi) surface. The PSi layer was prepared by Photo-electrochemical etching technique using a current density between 15 to 30mA/cm2. The AgNPs/ MWCNT was decorated on a PSi surface by a simple ion reduction from aqueous solutions of silver salt (AgNO3) at 5X10−2 M, 10− 2 M, 10− 3 M, and 10− 4 M concentrations. Structural, morphological and optical characterizations of (AgNPs/MWCNT/PSi) hybrid structure were analyzed with respect of the PSi layer morphology. The obtained results showed that a possibility of effectively controlling the hybrid structures morphology, the AgNPs size and the surface area by controlling the pores’ diameters. The deposition of the MWCNT and AgNPs on the wall and pore may enhance the specific surface area of the hybrid structure. Moreover, the decrease in the concentration of the silver salt aqueous solution can led to a significant decrease in the AgNPs sizes, and this can added another means in modifying the hybrid structures.

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Section: Resultssupporting

confidence: 91%

New approach of creation and modifying the characteristics of AgNPs/MWCNT/PSi hybrid structures

Ali,

Alwan,

Jabbar

2023

Preprint

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“…The XRD diffraction of bare PSi layer which prepared at current density 30mA/cm 2 and its related hybrid structure at different concentration of AuNPs are shown in fig (9). 111), ( 200) and (220) plane [49]. This outcome is reasonably consistent with the results presented in the data JCPDS card 96-101-1061 (PSi) JCPDS-ICDD card no.04-802 (MWCNT) JCPDS card 27-1402 (AuNPs) .…”

Section: ) X-ray Diffraction Analysis Of Hybrid Structuressupporting

confidence: 91%

New approach of creation and modifying the characteristics of AuNPs/MWCNT/PSi hybrid structures

Ali,

Alwan,

Jabbar

2023

Preprint

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In this paper, a new approach is presented on modifying the properties of hybrid structures of gold nanoparticles (AuNPs) and multi wall carbon nanotubes (MWCNT); deposited on morphologically controlled porous silicon (PSi) surface. The PSi layer was prepared by Photo-electrochemical etching using a current density between 15 to 30mA/cm2. The AuNPs/ MWCNT was decorated on a PSi surface by simple ion reduction from aqueous solutions of gold salt (HAuCl4) at 5\(\times\)10−2 M, 10− 2 M, 10− 3 M, and 10− 4 M concentrations. Structural, morphological and optical characterizations of (AuNPs/MWCNT/PSi) hybrid structure were analyzed with respect of the PSi layer morphology. The obtained results showed a possibility of effectively controlling the hybrid structures morphology, the AuNPs size and the surface area by controlling the pores’ diameters. The deposition of the MWCNT and AuNPs on the wall and pore may enhance the specific surface area of the hybrid structure. Moreover, the decrease of the concentration of the gold salt aqueous solution led a significant decrease of the AuNPs sizes, and this added another means to modify the hybrid structures.

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“…22 The I-V characteristics of hybrid structure become Schottky structure and the reducing resistivity of the Si nanocolumns. 23 When Si nanocolumns modified with Ag nanoparticle, improved the integrated specific surface area (S.S.A) and hence increased the gas adsorption rate, a high sensitivity, similar response, time and recovery time were obtained. 24 The NH 3 desorption will change the relative permittivity of the Si nanocolumns layer.…”

Section: Electrical Characteristics Of Bare Si Nanocolumns and Hybrid...mentioning

confidence: 95%

Influence of Ag NPs on Silicon Nanocolumns NH₃Gas Sensors

Hashim

Alwan

Jawad

2018

J. Electrochem. Soc.

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Al hybrid structures, have been fabricated and tested. A bare silicon nanocolumns layer was synthesized by a laser-assisted electrochemical etching process in HF solutions. The surface morphology of bare Si nanocolumns was modified by incorporating Ag NPs into Si nanocolumns by simple and fast immersions methods in an aqueous solution of AgNO 3 to synthesize a hybrid structure. Characteristic features of bare Si nanocolumns and hybrid structure were investigated using scanning electron microscopy, EDS analysis, FTIR spectra, X-ray diffraction, and photoluminescence spectra (PL). The electrical characteristics of sensors with and without NH 3 gas were measured at room temperature. The results showed that the nanoparticles grain size, nature, specific surface area (S.S.A) of Ag NPs, and morphological structure of the Si nanocolumns strongly affected the property characteristics. A significant enhancement in sensitivity, response, and recovery times of gas sensor for a hybrid structure was realized after compared with Al/Si nanocolumns/n-Si/Al gas sensor due to the high specific surface area.

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Study of the Influence of Incorporation of Gold Nanoparticles on the Modified Porous Silicon Sensor for Petroleum Gas Detection

Cited by 30 publications

References 8 publications

New approach of creation and modifying the characteristics of AgNPs/MWCNT/PSi hybrid structures

New approach of creation and modifying the characteristics of AgNPs/MWCNT/PSi hybrid structures

New approach of creation and modifying the characteristics of AuNPs/MWCNT/PSi hybrid structures

Influence of Ag NPs on Silicon Nanocolumns NH₃Gas Sensors

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Study of the Influence of Incorporation of Gold Nanoparticles on the Modified Porous Silicon Sensor for Petroleum Gas Detection

Cited by 30 publications

References 8 publications

New approach of creation and modifying the characteristics of AgNPs/MWCNT/PSi hybrid structures

New approach of creation and modifying the characteristics of AgNPs/MWCNT/PSi hybrid structures

New approach of creation and modifying the characteristics of AuNPs/MWCNT/PSi hybrid structures

Influence of Ag NPs on Silicon Nanocolumns NH3Gas Sensors

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Influence of Ag NPs on Silicon Nanocolumns NH₃Gas Sensors