Ag/Pd core-shell nanoparticles by a successive method: Pulsed laser ablation of Ag in water and reduction reaction of PdCl2

Mottaghi, Navid; Ranjbar, M.; Farrokhpour, Hossein; Khoshouei, Maryam; Khoshouei, A.; Kameli, P.; Salamati, H.; Tabrizchi, Mahmoud; Jalilian-Nosrati, M.

doi:10.1016/j.apsusc.2013.12.075

Cited by 38 publications

(16 citation statements)

References 34 publications

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“…Further, Mottaghi et al. were able to produce Ag@Pd core‐shell NPs in the presence of colloidal silver NPs and palladium salt solution . Additionally, as the interest in ternary nanoalloys recently increases significantly within the field of catalysis, first studies based on laser irradiation of mixed solutions of metallic ions were conducted.…”

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

confidence: 99%

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%

Perspective of Surfactant‐Free Colloidal Nanoparticles in Heterogeneous Catalysis

et al. 2019

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“…27 In addition, the solvent was modified to tune the composition of metastable Au-Fe nanoalloys. 28 In other experiments, core@shell structures with minimal interfacial alloying were obtained by the laser ablation of Ag in a reactive environment containing Pd(II) ions, 29 or elongated alloy structures were produced using LASiS in superfluid He. 30 Therefore, the control of the LASiS chemical environment is crucial to disclose a wide library of nanoalloys and to improve control over the structure of already achievable alloy NPs.…”

Section: Introductionmentioning

confidence: 99%

Metastable alloy nanoparticles, metal-oxide nanocrescents and nanoshells generated by laser ablation in liquid solution: influence of the chemical environment on structure and composition

Scaramuzza

Agnoli

Amendola

2015

Phys. Chem. Chem. Phys.

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Alloy nanoparticles are characterized by the combination of multiple interesting properties, which are attractive for technological and scientific purposes. A frontier topic of this field is nanoalloys with compositions not thermodynamically allowed at ordinary temperature and pressure (i.e. metastable), because they require out-of-equilibrium synthetic approaches. Recently, laser ablation synthesis in solution (LASiS) was successfully applied for the realization of metastable nanoalloys because of the fast kinetics of nanoparticle formation. However, the role played by the chemical environment on the final composition and structure of laser generated nanoalloys still has to be fully elucidated. Here, we investigated the influence of different synthetic conditions on the LASiS of metastable nanoalloys composed of Au and Fe, such as the use of water instead of ethanol, the bubbling of inert gases and the addition of a few vol% of H2O2 and H2O. The two elements showed different reactivity when LASiS was performed in water instead of ethanol, while minor effects were observed from bubbling pure gases such as N2, Ar and CO2 in the liquid solution. Moreover, the plasmonic response and the structure of the nanoalloys were sensibly modified by adding H2O2 to water. We also found that nanoparticle production is dramatically influenced just by adding 0.2% of H2O in ethanol. These results suggest that the formation of a cavitation bubble with long lifetime and large size during LASiS is useful for the preservation of the metastable alloy composition, whereas an oxidative environment hampers the formation of metastable alloy nanoparticles. Overall, by acting on the type of solvent and solutes, we were able to switch from a traditional synthetic approach for the composition of Au-Fe nanoalloys to one using a reactive environment, which gives unconventional structures such as metal@iron-oxide nanoshells and nanocrescents of oxide supported on metal nanospheres. These results expand the knowledge about the mechanism of the formation of nanoalloys using LASiS and show how to obtain multielement nanoparticles of enormous interest for nanomedicine, plasmonics, magneto-plasmonics and catalysis.

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“…Non-equilibrium transformation of cube@cube nanocrystals. We first focus on Ag@Pd and Cu@Pd nanocrystals [49][50][51] with a simple cube@cube geometry and thin surface shell. Both compositions are such that bonds for the shell atoms (Pd, bond energy 0.326 eV) are stronger than bonds for the core atoms (Ag or Cu, bond energies 0.238 eV and 0.295 eV, respectively).…”

Section: Resultsmentioning

confidence: 99%

Particle Shape Control via Etching of Core@Shell Nanocrystals

Leonardi

Engel

2018

ACS Nano

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The application of nanocrystals as heterogeneous catalysts and plasmonic nanoparticles requires fine control of their shape and chemical composition. A promising idea to achieve synergistic effects is to combine two distinct chemical and/or physical functionalities in bimetallic core@shell nanocrystals. Although techniques for the synthesis of single-component nanocrystals with spherical or anisotropic shape are well-established, new methods are sought to tailor multicomponent nanocrystals. Here, we probe etching in a controlled redox environment as a synthesis technique for multicomponent nanocrystals. Our Monte Carlo computer simulations demonstrate the appearance of characteristic non-equilibrium intermediate microstructures that are further thermodynamically tested and analyzed with molecular dynamics. Convex platelet, concave polyhedron, pod, cage, and strutted-cage shapes are obtained at room temperature with fully coherent structure exposing crystallographic facets and chemical elements along distinct particle crystallographic directions. We observe that structural and dynamic properties are markedly modified compared to the untreated compact nanocrystal.

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Ag/Pd core-shell nanoparticles by a successive method: Pulsed laser ablation of Ag in water and reduction reaction of PdCl2

Cited by 38 publications

References 34 publications

Perspective of Surfactant‐Free Colloidal Nanoparticles in Heterogeneous Catalysis

Perspective of Surfactant‐Free Colloidal Nanoparticles in Heterogeneous Catalysis

Metastable alloy nanoparticles, metal-oxide nanocrescents and nanoshells generated by laser ablation in liquid solution: influence of the chemical environment on structure and composition

Particle Shape Control via Etching of Core@Shell Nanocrystals

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