Pulsed laser ablation in liquid for micro-/nanostructure generation

Yan, Zijie; Chrisey, Douglas B.

doi:10.1016/j.jphotochemrev.2012.04.004

Cited by 295 publications

(140 citation statements)

References 198 publications

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“…In LASiS, a difference between the stoichiometry of alloy nanoparticles and the original alloy target is observed when the two elements in the alloy have different reactivities or different vaporization heats. 48,53,54 Here, the vaporization heats of gold and iron are similar (324 and 340 kJ mol À1 , respectively), but iron can react with oxygen that is dissolved in non-deaerated solvents, as reported for instance during LASiS of NiFe NPs. 55 Transmission electron microscopy (TEM) images of the AuFeNP solution just aer LASiS but prior to the addition of EDTA/PEG indicated the presence of iron oxide and amorphous phases ( Fig.…”

Section: Synthesis and Structural Characterizationmentioning

confidence: 64%

Coexistence of plasmonic and magnetic properties in Au89Fe11 nanoalloys

et al. 2013

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We describe an environmentally friendly, top-down approach to the synthesis of Au 89 Fe 11 nanoparticles (NPs). The plasmonic response of the gold moiety and the magnetism of the iron moiety coexist in the Au 89 Fe 11 nanoalloy with strong modification compared to single element NPs, revealing a non-linear surface plasmon resonance dependence on the iron fraction and a transition from paramagnetic to a spin-glass state at low temperature. These nanoalloys are accessible to conjugation with thiolated molecules and they are promising contrast agents for magnetic resonance imaging.

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Section: Synthesis and Structural Characterizationmentioning

confidence: 64%

Coexistence of plasmonic and magnetic properties in Au89Fe11 nanoalloys

et al. 2013

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“…The water level covering the target material has an effect not only on the laser beam power or intensity but also on the laser beam focal length [33]. For example, the amount of laser power loss for a 2 mm of water level above the target is about 4 %; this amount will be increased to 8 % when the water level is 4 mm above the bulk target, so there is a linear relationship between the water height and laser power loss.…”

Section: Generation Of Ag-tio 2 Cluster and Tio 2 Nanoparticlesmentioning

confidence: 99%

“…For example, the amount of laser power loss for a 2 mm of water level above the target is about 4 %; this amount will be increased to 8 % when the water level is 4 mm above the bulk target, so there is a linear relationship between the water height and laser power loss. As well as for a 2 mm water level, the distance between the target and the focusing lens should be increased by an extra 0.5 mm and for 4 mm of water an extra 1 mm [33,34]. In this work, the effects of both cases were considered.…”

Section: Generation Of Ag-tio 2 Cluster and Tio 2 Nanoparticlesmentioning

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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“…An alternative method for the synthesis of nanoparticles in solution involves laser ablation of a bulk target material while the material is immersed in a liquid [16][17][18]. The nanoparticles are formed by the debris which is generated as a result of the material's ablation and a nanoparticles colloidal solution is formed.…”

Section: Introductionmentioning

confidence: 99%