One-pot synthesis of graphitic and nitrogen-doped graphitic layers on nickel nanoparticles produced by pulsed laser ablation in liquid: Solvent as the carbon and nitrogen source

Jung, Hyeon Jin; Choi, Myong Yong

doi:10.1016/j.apsusc.2018.07.036

Cited by 42 publications

(41 citation statements)

References 49 publications

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Section: Laser‐based Materials Design: Multi‐elemental Nanoparticlesmentioning

confidence: 99%

“…In order to reduce or even suppress surface oxidation and related oxide‐ or hydroxide morphologies, as well as oxidation‐induced segregation in multi‐metallic nanoparticles, LSPC in organic solvents has been further developed during the recent years. Commonly, these nanoparticles gained from LAL in organic solvents are covered with a graphitic carbon‐shell potentially originating from solvent decomposition or pyrolysis during LAL . Different applications of such nanocomposites were already discussed in literature, including size quenching, and augmented activity of Pd−C core‐shell nanoparticles for reduction of nitrobenzene, tunable luminescence properties, or supercapacitor application of transition‐metal‐core, carbon‐shell nanoparticles.…”

Section: Laser‐based Materials Design: Multi‐elemental Nanoparticlesmentioning

confidence: 99%

“…Commonly, these nanoparticles gained from LAL in organic solvents are covered with a graphitic carbon‐shell potentially originating from solvent decomposition or pyrolysis during LAL . Different applications of such nanocomposites were already discussed in literature, including size quenching, and augmented activity of Pd−C core‐shell nanoparticles for reduction of nitrobenzene, tunable luminescence properties, or supercapacitor application of transition‐metal‐core, carbon‐shell nanoparticles. But, only few studies are published to date investigating the mechanism behind the carbon‐shell or carbide formation.…”

Section: Laser‐based Materials Design: Multi‐elemental Nanoparticlesmentioning

confidence: 99%

“… a) Number of graphene layers (N GL ) around Ni NP with respect Ni NP diameter (d NP ) generated by LAL in acetonitrile (1064 nm, ns‐laser pulses) with the raw data and exponential fit as well as the comics of carbon coated Ni NP being taken from Choi et. al . Copyright 2018 Elsevier.…”

Section: Laser‐based Materials Design: Multi‐elemental Nanoparticlesmentioning

confidence: 99%

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Perspective of Surfactant‐Free Colloidal Nanoparticles in Heterogeneous Catalysis

et al. 2019

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Due to material gaps and synthesis‐related cross‐correlations in heterogeneous catalysis, chemists and physicists are constantly motivated to develop novel catalyst preparation methods for independent control of morphology, size, and composition. Within this article, advances, opportunities, and the current limits of laser‐based catalyst preparation technique, as well as synergies with conventional methods will be reviewed in terms of purity, particle size, morphology, composition, and nanoparticle‐support interaction. It will be shown, that the surfactant‐free particles represent ideal model materials to validate kinetic models and conduct parametric activity studies by independent adjustment of functional properties like nanoparticle size, composition, and load. Consequently, the importance of transient plasma dynamics tailoring nanoparticle formation will be pointed out, comparing experimental studies with own calculations and novel simulations taken from literature. Finally, perspectives of surfactant‐free colloidal nanoparticles for unrevealing active sites in heterogeneous catalysts are presented.

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Section: Laser‐based Materials Design: Multi‐elemental Nanoparticlesmentioning

confidence: 99%

Section: Laser‐based Materials Design: Multi‐elemental Nanoparticlesmentioning

confidence: 99%

Section: Laser‐based Materials Design: Multi‐elemental Nanoparticlesmentioning

confidence: 99%

Section: Laser‐based Materials Design: Multi‐elemental Nanoparticlesmentioning

confidence: 99%

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Perspective of Surfactant‐Free Colloidal Nanoparticles in Heterogeneous Catalysis

et al. 2019

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“…Then a droplet of the diluted colloidal solution is poured onto a 400-mesh copper grid covered with an holey carbon film (reference AGS147-4 from Agar Scientific Ltd). This specific measurement has been performed in order to investigate the possible presence of a carbon shell surrounding the nanoparticle when produced in organic solvents, as reported in the literature 14,[33][34][35][36][37][38][39][40] . It is confirmed in Figure 1e where a low-Z non continuous shell is observed around the nanoparticles, attributed to one or two graphite monolayers (see below).…”

Section: Transmission Electron Microscopy and Centrifugal Sedimentationmentioning

confidence: 99%

Assessing the Surface Oxidation State of Free-Standing Gold Nanoparticles Produced by Laser Ablation

et al. 2019

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Surface chemistry of gold nanoparticles produced by pulsed laser ablation in liquids method is investigated by X-ray Photoelectron Spectroscopy (XPS). The presence of surface oxide expected on these systems is investigated using synchrotron radiation in conditions close to their original state in solvent, but free from substrate or solvent effects which could affect the interpretation of spectroscopic observations. For that purpose, we performed the experiment on a controlled free-standing nanoparticle beam produced by the combination of an atomizer and an aerodynamic lens system. These results are compared with those obtained by the standard situation of deposited nanoparticles on silicon substrate. An accurate analysis based on Bayesian statistics concludes that the existence of oxide in the free-standing conditions cannot be solely confirmed by the recorded core-level 4f spectra. If present, our data indicate an upper limit of 2.15 ± 0.68 % of oxide. However, a higher credence to the hypothesis of its existence is brought by the structureless valence profile of the free-standing beam. Moreover, the cross-comparison with the deposited nanoparticles case clearly evidences an important misleading substrate effect. Experiment with free-standing nanoparticles is then demonstrated to be the right way to further investigate oxidation states on Au-NP.

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Room‐Temperature Laser Synthesis in Liquid of Oxide, Metal‐Oxide Core‐Shells, and Doped Oxide Nanoparticles

Amendola

Amans

Ishikawa

et al. 2020

Chemistry A European J

232

186

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Although oxide nanoparticles are ubiquitous in science and technology, a multitude of compositions, phases, structures, and doping levels exist, each one requiring a variety of conditions for their synthesis and modification. Besides, experimental procedures are frequently dominated by high temperatures or pressures and by chemical contaminants or waste. In recent years, laser synthesis of colloids emerged as a versatile approach to access a library of clean oxide nanoparticles relying on only four main strategies running at room temperature and ambient pressure: laser ablation in liquid, laser fragmentation in liquid, laser melting in liquid and laser defect‐engineering in liquid. Here, established laser‐based methodologies are reviewed through the presentation of a panorama of oxide nanoparticles which include pure oxidic phases, as well as unconventional structures like defective or doped oxides, non‐equilibrium compounds, metal‐oxide core–shells and other anisotropic morphologies. So far, these materials showed several useful properties that are discussed with special emphasis on catalytic, biomedical and optical application. Yet, given the endless number of mixed compounds accessible by the laser‐assisted methodologies, there is still a lot of room to expand the library of nano‐crystals and to refine the control over products as well as to improve the understanding of the whole process of nanoparticle formation. To that end, this review aims to identify the perspectives and unique opportunities of laser‐based synthesis and processing of colloids for future studies of oxide nanomaterial‐oriented sciences.

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One-pot synthesis of graphitic and nitrogen-doped graphitic layers on nickel nanoparticles produced by pulsed laser ablation in liquid: Solvent as the carbon and nitrogen source

Cited by 42 publications

References 49 publications

Perspective of Surfactant‐Free Colloidal Nanoparticles in Heterogeneous Catalysis

Perspective of Surfactant‐Free Colloidal Nanoparticles in Heterogeneous Catalysis

Assessing the Surface Oxidation State of Free-Standing Gold Nanoparticles Produced by Laser Ablation

Room‐Temperature Laser Synthesis in Liquid of Oxide, Metal‐Oxide Core‐Shells, and Doped Oxide Nanoparticles

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