Plasma parameters of Au nano-particles ablated on porous silicon produced via Nd-YAG laser at 355 nm for sensing NH3 gas

Ahmed, Ala F.; Abdulameer, Mohammed R.; Kadhim, Mustafa M.; Mutlak, Falah A.-H.

doi:10.1016/j.ijleo.2021.168260

Cited by 36 publications

(9 citation statements)

References 22 publications

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“…Gas‐sensing materials doped by gold have been documented in various systems, as exemplified in Table 1 . [ 10–31 ] The effect of gold nanoparticles (NPs) and coatings for enhancing gas sensor performance has been especially explored in combination with metals oxide (MO) and other semiconductors (Table 1, entries 6–23), notably in term of response time (t res ), recovery time (t rec ), relative response (RR) and limit of detection (LOD); this most often at high temperatures. However, hybrid organic‐inorganic nanocomposites have also been investigated based on polymers (polypyrroles, PPy, polyanilines, PANI, etc.)…”

Section: Resultsmentioning

confidence: 99%

Advanced Composite for sp³‐Carbon‐Based Gas Sensing Application from Gold Organometallic Single Nanolayering on Diamondoids

Bouzid,

Poinsot,

Mboyi

et al. 2023

Adv Materials Technologies

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The assembly of hybrid materials combining a pure sp3‐C platform from nano‐and microcrystals of molecularly‐defined nanometer‐sized functionalized diamondoids (nanodiamonds) coated with a gold transition metal nanolayer is conducted from the gas phase, following a two‐steps vapor phase dry construction process. By using first the controlled vapor phase self‐assembly of primary phosphine diamantane derivatives, followed by a chemical vapor decomposition of a suited gold organometallic complex the synthesis of the nanocomposite Au@H2P–DiamOH 2 is achieved. The gold deposit surface analysis reveals the formation of a Au–P covalent bonding, which excludes the formation of phosphine oxide, as confirmed at higher depth into the nanocomposite by Hard X‐ray Photoelectron Spectroscopy analysis (HaXPES). The thickness d of the gold layers deposited onto the surface of diamondoids is estimated to be around d = 0.8 ± 10% nm from XPS data, which allows combining the composite Au@H2P–DiamOH 2 with ITO interdigitated electrodes, to produce a long‐life, highly stable and reproducible, n‐type behavior sensor for ammonia detection. A relative response (RR) of 150% at 30 ppm and a limit of detection of 6 ppm are measured at room temperature (20 to 25 °C) and at 45% of relative humidity.

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Section: Resultsmentioning

confidence: 99%

Advanced Composite for sp³‐Carbon‐Based Gas Sensing Application from Gold Organometallic Single Nanolayering on Diamondoids

Bouzid,

Poinsot,

Mboyi

et al. 2023

Adv Materials Technologies

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“…The change in total collision frequency as (E/N) changes is displayed in Figure (2). The values of the total collision frequency gradually increase as (E/N) increases due to electrons gaining energy as a result of elastic collisions.…”

Section: Influence Of Reduced Electric Field On Total Collision Frequ...mentioning

confidence: 98%

“…Plasma is a neutral gas composed of neutral and charged particles, such as the upper atmosphere, interstellar matter, and the Earth's ionosphere [1,2]. There are many applications of plasma like solar cells, photodetectors, optoelectronic devices and biomedical device [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Determination of the Mathematical Model for Plasma Electronic Coefficients of the Earth's Ionosphere

Temur

Ahmed

Ali

2023

Iraqi Journal of Science

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In this research, electron coefficients such as total collision frequency (colt/N), total ionization frequency (viz/N), and Power (P/N) for different gases such as (Ar, He, N2 and O2 (in Earth’s ionosphere have been calculated by applying the Boltzmann equation utilizing BOLSIG +, and it has been discovered that there is a significant impact of reducing the electric field (E/N) on electronic coefficients under which (E/N) increases. In addition, influence of (E/N) on electronic coefficients was studied. Reducing the electric field was chosen in the restricted range (1-100) Td, and the electronic coefficients for gases in the limited range (50-2000) km of the Earth's ionosphere. A positive correlation has been explained between all the plasma electronic coefficients and (E/N) for the four gases. It was found that He gas has higher electronic coefficients than other gases in the Earth's ionosphere because they have lower electron binding energy.

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“…Gases are insulating and transparent to the laser beam at normal intensities, which quickly turns to high-conductive, self-lighting and hot plasma when exposed to radiation from a strong-intensity laser [2][3][4]. In plasma production by laser, highintensity laser pulses interact with the target, leading to plasma formation within nanoseconds due to high plasma propagation [5][6][7][8]. The nature and dynamics of laser plasma generated depend on several variables, including the laser wavelength, the laser spot size, the laser pulse width, and the pressure of the surrounding gas [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Computation of Electron Density in Laser-Induced Carbon Plasma using Anisimov Model

Abdulameer

2023

IJP

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In this work, electron number density calculated using Matlab program code with the writing algorithm of the program. Electron density was calculated using Anisimov model in a vacuum environment. The effect of spatial coordinates on the electron density was investigated in this study. It was found that the Z axis distance direction affects the electron number density (ne). There are many processes such as excitation; ionization and recombination within the plasma that possible affect the density of electrons. The results show that as Z axis distance increases electron number density decreases because of the recombination of electrons and ions at large distances from the target and the loss of thermal energy of the electrons in high distance with the progress of time and at a certain coordinate. The target is carbon (Graphite). The results were selected in four dimensions where three of them belong to spatial coordinates x, y, z and the fourth dimension is the electron density (ne).

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Plasma parameters of Au nano-particles ablated on porous silicon produced via Nd-YAG laser at 355 nm for sensing NH3 gas

Cited by 36 publications

References 22 publications

Advanced Composite for sp³‐Carbon‐Based Gas Sensing Application from Gold Organometallic Single Nanolayering on Diamondoids

Advanced Composite for sp³‐Carbon‐Based Gas Sensing Application from Gold Organometallic Single Nanolayering on Diamondoids

Determination of the Mathematical Model for Plasma Electronic Coefficients of the Earth's Ionosphere

Theoretical Computation of Electron Density in Laser-Induced Carbon Plasma using Anisimov Model

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Plasma parameters of Au nano-particles ablated on porous silicon produced via Nd-YAG laser at 355 nm for sensing NH3 gas

Cited by 36 publications

References 22 publications

Advanced Composite for sp3‐Carbon‐Based Gas Sensing Application from Gold Organometallic Single Nanolayering on Diamondoids

Advanced Composite for sp3‐Carbon‐Based Gas Sensing Application from Gold Organometallic Single Nanolayering on Diamondoids

Determination of the Mathematical Model for Plasma Electronic Coefficients of the Earth's Ionosphere

Theoretical Computation of Electron Density in Laser-Induced Carbon Plasma using Anisimov Model

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Product

Resources

About

Advanced Composite for sp³‐Carbon‐Based Gas Sensing Application from Gold Organometallic Single Nanolayering on Diamondoids

Advanced Composite for sp³‐Carbon‐Based Gas Sensing Application from Gold Organometallic Single Nanolayering on Diamondoids