Preparation of silver nanoparticles in virgin coconut oil using laser ablation

Zamiri, Reza; Azmi, B. Z.; Sadrolhosseini, Amir Reza; Ahangar, Hossein Abbastabar; Zaidan, A. W.; Mahdi, Mohd Adzir

doi:10.2147/ijn.s14005

Cited by 63 publications

(28 citation statements)

References 25 publications

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“…Indeed, the mean particle size for LASiS in water was significantly larger than for starch LASiS and the increase in mean particle size scaled at least seven times faster with the repetition rate, as deduced from the slopes in Figure 4. These results are generally in good agreement with our previous observations 18, 30 and the results reported by others. 26,31 Ag-NPs are generally formed through phase transition, followed by nucleation during plasma plume cooling for which the driving force is supersaturation, and further crystal growth.…”

Section: Resultssupporting

confidence: 94%

The effect of laser repetition rate on the LASiS synthesis of biocompatible silver nanoparticles in aqueous starch solution

Zamiri¹,

Zakaria²,

Ahangar³

et al. 2013

IJN

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Laser ablation-based nanoparticle synthesis in solution is rapidly becoming popular, particularly for potential biomedical and life science applications. This method promises one pot synthesis and concomitant bio-functionalization, is devoid of toxic chemicals, does not require complicated apparatus, can be combined with natural stabilizers, is directly biocompatible, and has high particle size uniformity. Size control and reduction is generally determined by the laser settings; that the size and size distribution scales with laser fluence is well described. Conversely, the effect of the laser repetition rate on the final nanoparticle product in laser ablation is less well-documented, especially in the presence of stabilizers. Here, the influence of the laser repetition rate during laser ablation synthesis of silver nanoparticles in the presence of starch as a stabilizer was investigated. The increment of the repetition rate does not negatively influence the ablation efficiency, but rather shows increased productivity, causes a red-shift in the plasmon resonance peak of the silver-starch nanoparticles, an increase in mean particle size and size distribution, and a distinct lack of agglomerate formation. Optimal results were achieved at 10 Hz repetition rate, with a mean particle size of ∼10 nm and a bandwidth of ∼6 nm 'full width at half maximum' (FWHM). Stability measurements showed no significant changes in mean particle size or agglomeration or even flocculation. However, zeta potential measurements showed that optimal double layer charge is achieved at 30 Hz. Consequently, Ag-NP synthesis via the laser ablation synthesis in solution (LASiS) method in starch solution seems to be a trade-off between small size and narrow size distributions and inherent and long-term stability.

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Section: Resultssupporting

confidence: 94%

The effect of laser repetition rate on the LASiS synthesis of biocompatible silver nanoparticles in aqueous starch solution

Zamiri¹,

Zakaria²,

Ahangar³

et al. 2013

IJN

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“…The experimental apparatus used for laser ablation of metal plate has been described elsewhere. [1][2][3][4] The beam was focused onto the target using a 25 cm focal length lens. The plate was then removed from the glass cell, and the silver nanoparticles were irradiated by another Q-switched Nd:YAG pulsed laser (SL400/SL800 system) of wavelength 532 nm, duration 10 nsec, and pulse energy 60 mJ for 15 minutes.…”

Section: Methodsmentioning

confidence: 99%

“…Fabrication of metal nanoparticles by laser ablation of bulk plate in liquid media has been investigated intensively in recent research. [1][2][3][4] The results of these studies have shown that laser beam irradiation onto metal nanoparticles causes fragmentation or fusion of the particles due to photothermal melting. [5][6][7][8][9] Therefore, laser irradiation can be used to control the shape and size of particles.…”

Section: Introductionmentioning

confidence: 99%

Formation of silver microbelt structures by laser irradiation of silver nanoparticles in ethanol

Zamiri¹,

Zakaria²,

Husin³

et al. 2011

IJN

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In the present work, we prepared silver nanoparticles by laser ablation of pure silver plate in ethanol and then irradiated the silver nanoparticles using a 532 nm Q-switched Nd:YAG pulsed laser. Transmission electron microscopic images of the sample after irradiation clearly showed formation of big structures, such as microrods and microbelts in ethanol. The obtained microbelts had a width of about 0.166 μm and a length of 1.472 μm. The reason for the formation of such a big structure is the tendency of the nanoparticles to aggregate in ethanol before irradiation, which causes fusion of the nanoparticles.

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“…It was shown that the increase of nanoparticle concentration led to reduced friction coefficient and wear rate. Further studies have demonstrated that lasersynthesized Cu and Ag nanoparticles in vegetable oils possess excellent stability due to high viscosity and surface-adsorbed long-chain hydrocarbons [30][31][32]. This laser ablation technique is of particular benefit for lubricants due to the absence of precursors and ligands, which can have an impact on the tribological properties.…”

Section: Introductionmentioning

confidence: 99%

Colloidal Stability of Metal Nanoparticles in Engine Oil under Thermal and Mechanical Load

2017

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Extended colloidal stability and high dispersion degree of nanolubricants are required to avoid nanoparticle deposition in combustion engines and to reduce friction and wear. The simple and rapid one-step technique of pulsed laser ablation in liquids is employed to synthesize precursor-free and highly dispersed gold nanoparticles in lubricants while the colloidal stability is measured by optical spectroscopy and transmission electron microscopy. A remarkable colloidal stability is determined under engine-like and ambient conditions for nine months in terms of constant primary particle size. In contrast to additive-free oils, almost no agglomeration is observed, which might be attributed to the attachment of engine oil additives or pyrolyzed/oxidized molecules to the nanoparticles preventing attractive nanoparticle interactions.

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Preparation of silver nanoparticles in virgin coconut oil using laser ablation

Cited by 63 publications

References 25 publications

The effect of laser repetition rate on the LASiS synthesis of biocompatible silver nanoparticles in aqueous starch solution

The effect of laser repetition rate on the LASiS synthesis of biocompatible silver nanoparticles in aqueous starch solution

Formation of silver microbelt structures by laser irradiation of silver nanoparticles in ethanol

Colloidal Stability of Metal Nanoparticles in Engine Oil under Thermal and Mechanical Load

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