Laser induced synthesis of nanoparticles in liquids

Kazakevich, P. V.; Simakin, A.V.; Voronov, V. V.; Shafeev, G. A.

doi:10.1016/j.apsusc.2005.06.059

Cited by 185 publications

(98 citation statements)

References 33 publications

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“…The optical spectrum shows a relative maximum at about 582 nm, which is the plasmon absorption of the Cu NPs [24]. The intensity of the plasmon band increases in concurrence with increase of the laser voltage directly.…”

Section: Resultsmentioning

confidence: 90%

“…Even in the absence of a surfactant, the Au NP colloid prepared in acetone is stable for 18 months. Meanwhile, it has been reported that Cu NPs are chemically active and can easily react with vapors of surrounding liquid and any oxygen dissolved in the colloidal solution [24]. However, the 10 ns pulse of the laser beam is considered to be insufficient time for copper NPs to combine with any dissociated/dissolved oxygen.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis of Au-Cu Nano-Alloy from Monometallic Colloids by Simultaneous Pulsed Laser Targeting and Stirring

2011

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Abstract:Experimental work has been focused on the formation of alloyed Au-Cu nanoparticles under simultaneous laser exposure and mechanical stirring of mixed monometallic colloids, here referred to as dual procedure. As a feed for the dual procedure, Au and Cu monometallic nanoparticle colloids have been using a laser ablation technique. To accomplish this, bulk targets were ablated with 1064 nm wavelength Nd: YAG laser in a pure acetone (99.99%) environment. Ultraviolet-visible optical absorption spectrometry, transmission electron microscopy, X-ray diffraction and X-ray fluorescence technique have been used to characterize the nanoparticles. It has been found that experimental conditions such as stirring and laser parameters strongly affect the synthesized particle properties, including the size, shape, composition and stability of the nanoparticles. Alloy nanoparticles containing 39% Au -61% Cu have also been prepared in the same process, but in two forms of a homogeneous alloy and a core-shell structure.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Synthesis of Au-Cu Nano-Alloy from Monometallic Colloids by Simultaneous Pulsed Laser Targeting and Stirring

2011

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“…The occurrence of fragmentation mechanism on nanoparticles in higher ablation times and its effect on size reduction was also reported by other researchers 18 . Moreover, fragmentation is sometimes executed under the name of laser irradiation in order to decrease the size of the nanoparticles in colloidal solutions, while usually non-focused beam is radiated and no target is placed in front of it 8,17,21,[25][26][27][28] .…”

Section: Effect Of Ablation Timementioning

confidence: 99%

EFFECT OF LASER WAVELENGTH AND ABLATION TIME ON PULSED LASER ABLATION SYNTHESIS OF AL NANOPARTICLES IN ETHANOL

Baladi

Sarraf-Mamoory

2012

Int. J. Mod. Phys. Conf. Ser.

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Aluminum nanoparticles were synthesized by pulsed laser ablation of Al targets in ethanol for 5-15 minutes using the 1064 and 533 nm wavelengths of a Nd:YAG laser with energies of 280-320 mJ per pulse. It has been found that higher wavelength leads to significantly higher ablation efficiency, and finer spherical nanoparticles are also synthesized. Besides, it was obvious that higher ablation time resulted in higher ablated mass, while lower ablation rate was observed. Finer nanoparticles, moreover, are synthesized in higher ablation times.

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“…In comparison with chemical methods, colloidal nanoparticles prepared by laser ablation in a liquid environment are free from contamination [23], surfactants, counter-ions [11,24,25], and chemical reagents [1]. Furthermore, this method is a relatively simple way to prepare nanoparticles [26,27] without the need for the removal of unwanted chemicals.…”

Section: Introductionmentioning

confidence: 99%

The characteristics of novel bimodal Ag–TiO2 nanoparticles generated by hybrid laser-ultrasonic technique

Hamad

Liu

et al. 2016

Appl. Phys. A

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Silver-titania (Ag-TiO 2 ) nanoparticles with smaller Ag nanoparticles attached to larger TiO 2 nanoparticles were generated by hybrid ultrasonic vibration and picosecond laser ablation of Ag and Ti bulk targets in deionised water, for the first time. The laser has a wavelength of 1064 nm and a pulse duration of 10 ps. It was observed that without the ultrasonic vibration, Ag and TiO 2 nanoparticles did not combine, thus the role of ultrasonic vibration is essential. In addition, colloidal TiO 2 and Ag nanoparticles were generated separately for comparison under the same laser beam characteristics and process conditions. The absorption spectra of colloidal Ag-TiO 2 cluster nanoparticles were examined by UV-Vis spectroscopy, and size distribution was characterised using transmission electron microscopy. The morphology and composition of Ag-TiO 2 nanoparticles were examined using scanning transmission electron microscopy in highangle annular dark field, and energy-dispersive X-ray spectroscopy. The crystalline structures were investigated by X-ray diffraction. The size of larger TiO 2 particles was in the range 30-150 nm, and the smaller-sized Ag nanoparticles attached to the TiO 2 was mainly in the range of 10-15 nm. The yield is more than 50 % with the remaining nanoparticles in the form of uncombined Ag and TiO 2 . The nanoparticles generated had strong antibacterial effects as tested against E. coli. A discussion is given on the role of ultrasonic vibration in the formation of Ag-TiO 2 hybrid nanoparticles by picosecond laser ablation.

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Laser induced synthesis of nanoparticles in liquids

Cited by 185 publications

References 33 publications

Synthesis of Au-Cu Nano-Alloy from Monometallic Colloids by Simultaneous Pulsed Laser Targeting and Stirring

Synthesis of Au-Cu Nano-Alloy from Monometallic Colloids by Simultaneous Pulsed Laser Targeting and Stirring

EFFECT OF LASER WAVELENGTH AND ABLATION TIME ON PULSED LASER ABLATION SYNTHESIS OF AL NANOPARTICLES IN ETHANOL

The characteristics of novel bimodal Ag–TiO2 nanoparticles generated by hybrid laser-ultrasonic technique

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