Influence of Surfactant Concentration on Laser-Based Gold Nanoparticle Formation and Stability

Fong, Yuen-Yan; Gascooke, Jason R.; Metha, Gregory F.; Buntine, Mark A.

doi:10.1071/ch11366

Cited by 3 publications

(34 citation statements)

References 45 publications

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“…In a manner consistent with previous reports from our laboratory on the formation and stability of AuNPs, [19][20][21] CuNPs are directly prepared in aqueous solution by laser ablation. [35,36] Although the SPR peak position of all metal nanoparticles (MNPs) is affected by particle size and shape, the SPR peak position and intensity in CuNPs are reported to be particularly susceptible to oxidation at the NP surface, with the formation of Cu 2 O and CuO.…”

Section: Resultssupporting

confidence: 53%

“…We have previously reported the development of a kinetic model for the laser-based formation of AuNPs under our experimental conditions, [19,21] and we seek to explore the CuNP formation kinetics using this same approach.…”

Section: Resultsmentioning

confidence: 99%

“…[32] Copper Nanoparticle Formation The LASiS experimental method employed in our laboratory has been previously reported. [19][20][21] Only salient details are reported here. CuNPs were prepared in a manner similar to that reported by Haram and Ahmad, [33] either in ultrapure water (purified with a Merck Millipore Synergy UV water purification system; Millipore S.A.S, Molsheim, France) or in the presence of either 4,49Bipy or T-4Py at a concentration of 1 Â 10 À4 M. Laser ablation was performed for 60 min at 1064 nm using a Continuum Surelite II Nd:YAG laser operating at 10 Hz and 7.5 mJ pulse À1 .…”

Section: N-donor Ligandsmentioning

confidence: 99%

“…Previous studies from our laboratory have involved the production of gold nanoparticles (AuNPs) encapsulated by anionic [19,21] and cationic [20] surfactants in aqueous solution. A motivation for the study is to explore the fundamental chemistry involved in CuNP production in the presence of N-donor ligands via the LASiS approach.…”

Section: Introductionmentioning

confidence: 99%

“…[16][17][18] In recent years, the use of laser-based methods to produce a variety of metal nanoparticles has become increasingly common. [19][20][21][22][23][24] The laser-based preparation of copper nanoparticles (CuNPs) has received attention, [25][26][27] in part owing to the history of copper as a coinage metal. However, unlike, for example, the laser-based formation of gold [23] and platinum [24] nanoparticles, the susceptibility of CuNPs to surface oxidation both during and following their formation has made studies of CuNP chemistry more challenging.…”

Section: Introductionmentioning

confidence: 99%

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Laser-Based Formation of Copper Nanoparticles in Aqueous Solution: Optical Properties, Particle Size Distributions, and Formation Kinetics

et al. 2017

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We explore the formation kinetics, optical absorption spectra, and particle size distributions of copper nanoparticles (CuNPs) formed by direct laser ablation from the bulk metal via a process we refer to as Laser Ablation Synthesis in Solution (LASiS). Comparisons are made between CuNPs formed in pure water versus those formed in the presence of 1 Â 10 À4 M solutions of the N-donor ligands 4,4 0 -bipyridine (4,49Bipy) and 1H-5-(4-pyridyl)tetrazole (T-4Py). CuNPs formed in pure water and in the presence of 4,49Bipy display similar UV-visible absorption spectra and very similar particle size distributions. In comparison, CuNPs formed in the presence of T-4Py display significantly different absorption properties, with the surface plasmon resonance transition blue-shifted by ,55 nm, and a much smaller and narrower particle size distribution compared with the former samples. Based on previous literature reports, it is possible to ascribe these differences to differences in the CuNP surface oxidation states for samples prepared in the presence of T-4Py. However, an analysis of the formation kinetics of all three samples indicates near-identical behaviour.

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Section: Resultssupporting

confidence: 53%

Section: Resultsmentioning

confidence: 99%

Section: N-donor Ligandsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Laser-Based Formation of Copper Nanoparticles in Aqueous Solution: Optical Properties, Particle Size Distributions, and Formation Kinetics

et al. 2017

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Ligand-Mediated Control of the Surface Oxidation States of Copper Nanoparticles Produced by Laser Ablation

et al. 2023

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We report on studies that demonstrate how the chemical composition of the surface of copper nanoparticles (CuNPs) – in terms of percentage copper(I/II) oxides – can be varied by the presence of N-donor ligands during their formation via laser ablation. Changing the chemical composition thus allows systematic tuning of the surface plasmon resonance (SPR) transition. The trialed ligands include pyridines, tetrazoles, and alkylated tetrazoles. CuNPs formed in the presence of pyridines, and alkylated tetrazoles exhibit a SPR transition only slightly blue shifted with respect to CuNPs formed in the absence of any ligand. On the other hand, the presence of tetrazoles results in CuNPs characterized by a significant blue shift of the order of 50–70 nm. By comparing these data also with the SPR of CuNPs formed in the presence of carboxylic acids and hydrazine, this work demonstrates that the blue shift in the SPR is due to tetrazolate anions providing a reducing environment to the nascent CuNPs, thus preventing the formation of copper(II) oxides. This conclusion is further supported by the fact that both AFM and TEM data indicate only small variations in the size of the nanoparticles, which is not enough to justify a 50–70 nm blue-shift of the SPR transition. High-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) studies further confirm the absence of Cu(II)-containing CuNPs when prepared in the presence of tetrazolate anions.

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Influence of Cationic Surfactants on the Formation and Surface Oxidation States of Gold Nanoparticles Produced via Laser Ablation

et al. 2013

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We report on the time evolution of gold nanoparticles produced by laser ablation in the presence of the cationic surfactants cetyltrimethylammonium bromide (CTAB) and cetyltrimethylammonium chloride (CTAC) in aqueous solution. The broader applicability of a laser-induced nanoparticle formation kinetic model previously developed by us for the case of anionic surfactants in aqueous solution [ J. Phys. Chem. C 2010 , 114 , 15931 - 15940 ] is shown to also apply in the presence of cationic surfactants. We explore the surface properties of the nanoparticles produced in the presence of the cationic surfactants via synchrotron X-ray photoelectron spectroscopy (XPS). The XPS data indicate that at CTA(+) concentrations approximating the aqueous critical micelle concentration Au(III) is present on the nanoparticle surface. Such oxidation is not observed at (i) lower CTA(+) concentrations, (ii) in the presence of an anionic surfactant, or (iii) in the case of pure water as a solvent.

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Influence of Surfactant Concentration on Laser-Based Gold Nanoparticle Formation and Stability

Cited by 3 publications

References 45 publications

Laser-Based Formation of Copper Nanoparticles in Aqueous Solution: Optical Properties, Particle Size Distributions, and Formation Kinetics

Laser-Based Formation of Copper Nanoparticles in Aqueous Solution: Optical Properties, Particle Size Distributions, and Formation Kinetics

Ligand-Mediated Control of the Surface Oxidation States of Copper Nanoparticles Produced by Laser Ablation

Influence of Cationic Surfactants on the Formation and Surface Oxidation States of Gold Nanoparticles Produced via Laser Ablation

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