Opportunities and Challenges for Laser Synthesis of Colloids

Gökce, Bilal; Amendola, Vincenzo; Barcikowski, Stephan

doi:10.1002/cphc.201700310

Cited by 33 publications

(15 citation statements)

References 40 publications

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“…[14][15][16] Additional appealing features of LASiS are the easy procedure, the low cost, the potentially "green" synthetic approach, and the access to nanoparticles with superior purity. 8,10,[17][18][19] A remarkable key point is the limited manual operation since LASiS is a selfstanding synthesis where the operator is required only at the beginning and at the end of the process, except for routine control of its status.…”

Section: Articlementioning

confidence: 99%

A system for the synthesis of nanoparticles by laser ablation in liquid that is remotely controlled with PC or smartphone

Crivellaro

Guadagnini

Arboleda

et al. 2019

Review of Scientific Instruments

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Nanoparticles find applications in multiple technological and scientific fields, and laser ablation in liquid (LAL) emerged as a versatile method for providing colloidal solutions of nanomaterials with various composition, by a low cost, simple, self-standing, and "green" procedure. However, the use of high energy and high power laser beams is harmful, especially when coupled with flammable or toxic liquids, and in situ operation is required for starting, monitoring the LAL synthesis, and stopping it at the desired point. Here we describe the hardware and software design and the test results of a system for the production of nanoparticles by laser ablation synthesis in liquid solution (LASiS), which is remotely controllable with a personal computer or a smartphone. In this system, laser energy and solution flux are selectable, and the synthesis status can be monitored and managed at any time off site. Only commercially available components and software are employed, making the whole apparatus easily reproducible in any LAL laboratory. The system has proven its reliability in various conditions, including intercontinental remote control experiments. Overall, this apparatus represents a step forward to improve the safety and to more efficiently exploit the time of people working with LASiS, thus contributing to the increasing demand for off-site real time monitoring of experimental equipment in many scientific and industrial laboratories, due to safety and efficiency requirements.

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Section: Articlementioning

confidence: 99%

A system for the synthesis of nanoparticles by laser ablation in liquid that is remotely controlled with PC or smartphone

Crivellaro

Guadagnini

Arboleda

et al. 2019

Review of Scientific Instruments

Self Cite

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“…To provide a solution to most of the above problems, the laser ablation synthesis in solution (LASiS) has been intensely applied and optimized in the last years, resulting in a large library of nanomaterials, [23–28] that includes various equilibrium and nonequilibrium nanoalloys like Fe−Mn, [29] Ag−Cu, [30] Pt−Cu, [31] Co−Al, [32] Au−Fe, [18,33] Ag−Fe, [34] Ag−Co, [35] as well as ternary, quaternary and quinary systems [36] or high‐entropy alloys [37] . The LASiS is scalable up to g/h of NPs, [38] is amenable of automatization and can be controlled also remotely with a PC or a smartphone, [39] thus reducing all risks connected to the laser sources, harmful or explosive compounds. The use of pure materials in the elemental form (e.g pure bulk metals) and pure liquids such as water, alcohols or acetone are key for the cost‐affordability of the process [40] .…”

Section: Introductionmentioning

confidence: 99%

Kinetically Stable Nonequilibrium Gold‐Cobalt Alloy Nanoparticles with Magnetic and Plasmonic Properties Obtained by Laser Ablation in Liquid

et al. 2021

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Nonequilibrium nanoalloys are metastable solids obtained at the nanoscale under nonequilibrium conditions that allow the study of kinetically frozen atoms and the discovery of new physical and chemical properties. However, the stabilization of metastable phases in the nanometric size regime is challenging and the synthetic route should be easy and sustainable, for the nonequilibrium nanoalloys to be practically available. Here we report on the one‐step laser ablation synthesis in solution (LASiS) of nonequilibrium Au−Co alloy nanoparticles (NPs) and their characterization on ensembles and at the single nanoparticle level. The NPs are obtained as a polycrystalline solid solution stable in air and water, although surface cobalt atoms undergo oxidation to Co(II). Since gold is a renowned plasmonic material and metallic cobalt is ferromagnetic at room temperature, these properties are both found in the NPs. Besides, surface conjugation with thiolated molecules is possible and it was exploited to obtain colloidally stable solutions in water. Taking advantage of these features, an array of magnetic‐plasmonic dots was obtained and used for surface‐enhanced Raman scattering experiments. Overall, this study confirms that LASiS is an effective method for the formation of kinetically stable nonequilibrium nanoalloys and shows that Au−Co alloy NPs are appealing magnetically responsive plasmonic building blocks for several nanotechnological applications.

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“…Because LAL generates nanomaterials under ambient conditions in water, it is considered a 'green' and sustainable synthesis method [16,22]. LAL of a Cu target in various solvents have been widely used to synthesize Cu NPs with solvent-and laser-dependent oxidation states and morphologies [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Controlling the morphology of copper-silica nanocomposites from laser ablation in liquid

John

Tibbetts

2020

Applied Surface Science

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Synthesis of copper-silica nanocomposites with controllable morphology and composition were produced with a one-step femtosecond reactive laser ablation in liquid (fs-RLAL) technique. The composite nanomaterials were generated by focusing femtosecond near-IR laser pulses onto a silicon wafer immersed in an aqueous copper(II) nitrate solution, with the solution pH adjusted using nitric acid or potassium hydroxide. Under acidic conditions (pH 3.0 and 5.4), little copper was incorporated in the predominantly silica product (1.4 and 1.5 wt.%). These acidic conditions yielded large ~30-80 nm silica particles, with some particles consisting of copper core/silica shell. In contrast, increasing the solution pH to 10.4 resulted in extremely high Cu loading of 31.5 wt.% and a composite product consisting of 1.5 nm copper clusters distributed throughout a matrix of amorphous silica and copper phyllosilicate. The relationship between the precursor solution pH and the product morphology and copper loading is attributed to the point of zero charge (PZC) of silica, in which the high solution pH allows for electrostatic adsorption to occur between the deprotonated silica clusters from the ablated silicon wafer and the copper hydroxide dimer formed in solution. File list (2) download file view on ChemRxiv CuSiO2_v7.pdf (4.09 MiB) download file view on ChemRxiv sicu_SI.pdf (1.16 MiB)

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Opportunities and Challenges for Laser Synthesis of Colloids

Cited by 33 publications

References 40 publications

A system for the synthesis of nanoparticles by laser ablation in liquid that is remotely controlled with PC or smartphone

A system for the synthesis of nanoparticles by laser ablation in liquid that is remotely controlled with PC or smartphone

Kinetically Stable Nonequilibrium Gold‐Cobalt Alloy Nanoparticles with Magnetic and Plasmonic Properties Obtained by Laser Ablation in Liquid

Controlling the morphology of copper-silica nanocomposites from laser ablation in liquid

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