Fabrication of platinum particles by intense, femtosecond laser pulse irradiation of aqueous solution

Nakamura, Takahiro; Takasaki, Kouichi; Ito, Akihiko; Sato, Shunichi

doi:10.1016/j.apsusc.2009.04.092

Cited by 25 publications

(8 citation statements)

References 19 publications

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“…A current limitation to the wide use of LRL is that the vast majority of studies reported to date focus on the easily reduced noble metals Au [ 34 , 35 , 36 , 37 , 38 ], Ag [ 39 , 40 , 41 ], Pt [ 42 ], and their alloys [ 43 , 44 , 45 ] because these metals are resistant to oxidation. Unlike in PLAL where the zero-valent metal is present in the initial target, metal NP formation in LRL requires chemical reactions between the molecular precursor(s) and the reactive species in LRL plasma.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Air-Stable Cu Nanoparticles Using Laser Reduction in Liquid

2021

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We report the synthesis of air-stable Cu nanoparticles (NPs) using the bottom-up laser reduction in liquid method. Precursor solutions of copper acetlyacetonate in a mixture of methanol and isopropyl alcohol were irradiated with femtosecond laser pulses to produce Cu NPs. The Cu NPs were left at ambient conditions and analyzed at different ages up to seven days. TEM analysis indicates a broad size distribution of spherical NPs surrounded by a carbon matrix, with the majority of the NPs less than 10 nm and small numbers of large particles up to ∼100 nm in diameter. XRD collected over seven days confirmed the presence of fcc-Cu NPs, with some amorphous Cu2O, indicating the stability of the zero-valent Cu phase. Raman, FTIR, and XPS data for oxygen and carbon regions put together indicated the presence of a graphite oxide-like carbon matrix with oxygen functional groups that developed within the first 24 h after synthesis. The Cu NPs were highly active towards the model catalytic reaction of para-nitrophenol reduction in the presence of NaBH4.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Air-Stable Cu Nanoparticles Using Laser Reduction in Liquid

2021

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“…It is emphasized that metal NPs are formed by the reduction of metal ions by solvated electrons when femtosecond laser pulses are utilized for LRL, because the density of electron generated by the ionization of solvent reaches up to 10 18 cm −3 . A variety of precious metal NPs as well as multimetallic alloy NPs have been prepared from aqueous metal salts . Nakashima et al.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Bare Iron Nanoparticles from Ferrocene Hexane Solution by Femtosecond Laser Pulses

et al. 2018

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Iron-based nanoparticles (FeNPs) have unique and attractive properties such as superparamagnetism, biocompatibility, and catalytic activity. Although the synthesis of precious metal NPs from a metal in liquid and/or metal salt solution by a pulsed laser has been investigated, comparably little effort has been devoted to examine the production of FeNPs. Here we report the synthesis of carbon-shell free spherical NPs of iron oxide (magnetite) from ferrocene hexane solution by femtosecond near infrared laser pulses. Nanosecond UV laser pulses are used to compare the evolution of the particle size distribution as a function of laser irradiation time. The size of NPs remains constant even for extended exposure to femtosecond laser pulses, whereas it grows with exposure to nanosecond laser pulses. The primary particles are generated by photochemical reactions regardless of pulse duration; however, the fragmentation of NPs by successive femtosecond laser pulses regulates the particle size.

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“…Another approach for forming NPs by pulsed laser irradiation is the photochemical reduction of metal ions in solution. The syntheses of not only single-element noble-metal NPs (Au, − Ag, and Pt) but also solid-solution alloy NPs in water have been reported by using femtosecond (fs) laser pulses. In particular, the synthesis of AuNPs in water by fs laser irradiation has been well studied in terms of the photochemical reduction mechanisms of aqueous [AuCl 4 ] − − and also with respect to the productivity, morphology, and size distribution of AuNPs. − In the above-mentioned studies, reactive species such as e aq – and H • , which are generated in microplasma by multiphoton ionization and/or excitation of water, react with dissolved metal ions.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Single-Nanometer-Sized Gold Nanoparticles in Liquid–Liquid Dispersion System by Femtosecond Laser Irradiation

et al. 2019

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Gold nanoparticles (AuNPs) show unique optical properties and catalytic activities, and their synthesis from gold ions has been widely studied. One of the additive-reagent-free and noncontact production procedures is the reduction of gold ions in solution by femtosecond laser pulses; however, the aggregation of AuNPs is unavoidable in homogeneous solution. Here, we report the synthesis of single-nanometer-sized AuNPs in a mixture of aqueous HAuCl 4 solution and n-hexane (the mixture) and in aqueous HAuCl 4 solution (the aqueous solution) by femtosecond laser irradiation in the absence of any additive reagents. Transmission electron microscopy revealed that circlelike colonies consisting of well-separated AuNPs were obtained from the mixture, while highly stacked and agglomerated AuNPs were obtained from the aqueous solution. The mean size of AuNPs in the mixture was nearly independent of the laser irradiation time, whereas that obtained in aqueous solution was gradually shifted to smaller size by laser irradiation period. We propose that the adsorption of primary AuNPs on the surface of hexane microdroplets and the fragmentation of large AuNPs in water by successive laser pulses retain single-nanometer-sized AuNPs in the mixture. The use of liquid−liquid interface on hexane microdroplets in aqueous solution provides a simple and useful environment to synthesize small AuNPs without the aid of surfactants or capping agents.

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Fabrication of platinum particles by intense, femtosecond laser pulse irradiation of aqueous solution

Cited by 25 publications

References 19 publications

Synthesis of Air-Stable Cu Nanoparticles Using Laser Reduction in Liquid

Synthesis of Air-Stable Cu Nanoparticles Using Laser Reduction in Liquid

Synthesis of Bare Iron Nanoparticles from Ferrocene Hexane Solution by Femtosecond Laser Pulses

Synthesis of Single-Nanometer-Sized Gold Nanoparticles in Liquid–Liquid Dispersion System by Femtosecond Laser Irradiation

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