Effect of external electric field on the formation of colloidal Ag–Au alloy nanoparticles through laser post-irradiation

Ahmadinejad, Ehsan; Mahdieh, Mohammad Hossein

doi:10.1117/1.jnp.15.026009

Cited by 3 publications

(2 citation statements)

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“…The size of NPs decreases significantly in the presence of electric field. This decrease in presence of 100 V cm −1 is in agreement with other reports applying 100 V cm −1 electric field [38,39]. These articles also report significant reduction in size of NPs.…”

Section: Size and Shape Of Ag Npssupporting

confidence: 92%

Synergistic influence of external electric field on laser ablation in liquid: correlating nanoparticle synthesis and cavitation bubble dynamics

Mehta,

Ahuja,

Kumar

et al. 2024

Phys. Scr.

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The present study aims to investigate the changes in the properties of nanoparticles (NPs) and cavitation bubble dynamics on applying an external electric field during laser ablation in liquid (LAL). Investigating electric field assisted laser ablation in liquid (EFLAL) is crucial since phenomena such as plasma charging effect and electrostatic pressure have important role in determining the size, shape, and crystallinity. of the NPs. With this motivation, the present study has been conducted with different electric fields of 0, 100, 500 and 1000 V/cm to probe the effect of an external electric field on the dynamics of EFLAL. The charging effect observed on NPs during cavitation bubble dynamics was also investigated at these field intensities. The size of NPs witnesses a reduction from ~30 nm without electric field to ~19 nm in presence of electric field. Also, a significant narrowing of the size distribution by over 4 times was observed in the presence of electric field. This clearly demonstrates that EFLAL can be used to obtain NPs with uniform size distribution. Moreover, NPs of different shapes have also been observed by varying the electric field intensities (100 and 1000 V/cm). The effect of the external electric field on the dynamics of the cavitation bubble produced during EFLAL has been probed using shadowgraphy technique. It has been observed that the bubble size increases with the presence of an electric field. The estimation of the bubble pressure in the presence of an electric field has revealed that the implosion bubble pressure is significantly lower than pressure in the absence of the field. The results obtained for NPs have been correlated to the changes in bubble parameters in this work.

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Section: Size and Shape Of Ag Npssupporting

confidence: 92%

Synergistic influence of external electric field on laser ablation in liquid: correlating nanoparticle synthesis and cavitation bubble dynamics

Mehta,

Ahuja,

Kumar

et al. 2024

Phys. Scr.

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“…Chemical and physical processes can both be used to generate NPs. Chemical methods were utilized to produce diverse NPs; but, chemical approaches have significant drawbacks (which include toxicity, incompatibility with the environment, and unwanted compounds) that make them inappropriate when compared to physical processes [5][6]. As a physical approach, pulsed laser ablation in liquids (PLAL) is used.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Au:TiO2 Nanoparticles via Laser Ablation in Liquid Deposited on Porous-Si for Improved Spectral Responsivity

Suliman¹,

Nayef²,

Mutlak³

2022

JASN

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In this study, Au:TiO2 nanoparticles (NPs) are prepared by using the laser ablation method in liquid at different laser energies (600, 800, and1000 mJ). After that, Au: TiO2 NPs were deposited on porous-Si(PS). Porous silicon (PS) is synthesized by using the photoelectrochemical etching (PECE) of n-type crystalline Si (c-Si) wafers of (100) orientation. The intensity of the etching current density was (4, 12, and 20 mA/cm 2 ), with 16% (HF), and the etching time was 15 minutes. The X-ray diffraction (XRD) techniques, scanning electron microscopy (SEM), UV-visible spectrophotometry, and electrical properties are used to characterize the obtained particles. From the photo-detector measurements, the spectral responsivity curves three inclusive regions; the first peak was due to the absorption of UV light by Au: TiO2 NPs. The second peak was corresponding to the visible light absorption with the PS layer and the third peak was due to the absorption edge of the Si substrate. The higher responsivity of Au: TiO2 NPs/PS photo-detector was found to be 2.56A/W for specimens prepared at laser energy 800mJ.

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Laser-assisted synthesis of Ag–Cu alloy nanoparticles with tunable surface plasmon resonance frequency in presence of external electric field

Ahmadinejad

Mahdieh

2021

Journal of Laser Applications

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The present study aimed to synthesize the colloidal Ag–Cu alloy nanoparticles (NPs) in the presence of an external electric field. Synthesis of Ag–Cu alloy NPs is important because of their unique properties for antibacterial and antimicrobial activities. Colloidal Ag and Cu NPs were produced individually with nanosecond pulsed laser ablation in distilled water and were mixed in equal volume. The mixed colloid was postirradiated in the presence of an external DC electric field. The obtained colloidal NPs were characterized using various diagnostic methods. The results of this study demonstrated the long-term stability and oxidation resistance of colloidal Ag–Cu alloy NPs compared to the Ag and Cu NPs. Also, the results of this study showed that the external electric field reduces the average size of alloy NPs, and tune the surface plasmon resonance frequency.

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Effect of external electric field on the formation of colloidal Ag–Au alloy nanoparticles through laser post-irradiation

Cited by 3 publications

References 0 publications

Synergistic influence of external electric field on laser ablation in liquid: correlating nanoparticle synthesis and cavitation bubble dynamics

Synergistic influence of external electric field on laser ablation in liquid: correlating nanoparticle synthesis and cavitation bubble dynamics

Synthesis of Au:TiO2 Nanoparticles via Laser Ablation in Liquid Deposited on Porous-Si for Improved Spectral Responsivity

Laser-assisted synthesis of Ag–Cu alloy nanoparticles with tunable surface plasmon resonance frequency in presence of external electric field

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