Preparation and Characteristics Study of Porous Silicon for Vacuum Sensor Application

Dawood, Noor S.; Zayer, Mehdi Q.; Jawad, Muslim F.

doi:10.33640/2405-609x.3209

Cited by 3 publications

(2 citation statements)

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“…The electrical and optical characteristics of silicon are thought to be effectively controlled by porosity. Etching settings can be utilized to adjust these characteristics [12][13][14][15]. The CNTs display high surface areas as fundamental qualities.They are highly desirable as substrates for heterogeneous catalysis due to their high elec trical conductivities, intrinsic size, and hollow architecture [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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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Section: Introductionmentioning

confidence: 99%

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

Ali,

Alwan,

Jabbar

2023

Preprint

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Section: Introductionmentioning

confidence: 99%

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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Technological challenges in manufacturing of vacuum gauge thermionic cathode using thick-film technology

Jasińska,

Dzbik,

Nowak

et al. 2024

Materials Science-Poland

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This paper focuses on the development of a technological challenges of manufacturing the planar ceramic vacuum sensor based on the principles of hot-cathode ionization in the Bayard-Alpert configuration. The goal is to simplify the technological process by utilizing planar platinum structures with gold electrical paths instead of 3-dimensional structures. Various methods were tested, including the use of carbon-based SVM (Sacrifice Volume Materials) materials, but without success. Wet-etching using potassium hydroxide on Al2O3 substrates showed promise results. The findings highlight the challenges and progress made in developing the thermo-emittercomponent of the vacuum sensor.

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Preparation and Characteristics Study of Porous Silicon for Vacuum Sensor Application

Cited by 3 publications

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

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

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

Technological challenges in manufacturing of vacuum gauge thermionic cathode using thick-film technology

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