Coexistence of plasmonic and magnetic properties in Au89Fe11 nanoalloys

Amendola, Vincenzo; Meneghetti, Moreno; Bakr, Osman M.; Riello, Pietro; Polizzi, Stefano; Anjum, Dalaver H.; Fiameni, S.; Arosio, Paolo; Orlando, Tomas; Fernández, César de Julián; Pineider, Francesco; Sangregorio, Claudio; Lascialfari, A.

doi:10.1039/c3nr01119d

Cited by 100 publications

(166 citation statements)

References 85 publications

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“…[97] In the same catalysis, Yang et al compared as eries of Ni and Pt based alloy NPs and showed that most of the alloys demonstrated higher catalytic performance than either pure Pt or Ni metals. [99,100] An additional advantage in the alloy NP system is that alloying using cheaper transition metals largelyr educes the use of expensive noble ones, such as Pt,l eadingt oamoree conomicm aterial. For instance, AuFe alloys with appropriate elemental ratio combine the unique features of both the SPR of Au NPs and magnetic property of Fe, which have demonstrateds ignificant application potential in both catalysis and magneto-opticalr esponses.…”

Section: Alloy Npsmentioning

confidence: 99%

“…[78,93,94,[100][101][102][103][104][105][106] Because Ag and Au possess very similarl attice constants, these two elements are highly miscible over the entire composition range. [78,93,94,[100][101][102][103][104][105][106] Because Ag and Au possess very similarl attice constants, these two elements are highly miscible over the entire composition range.…”

Section: Reviewsmentioning

confidence: 99%

“…ChemPhysChem 2017ChemPhysChem , 18,986 -1006 www.chemphyschem.org spite of the use of aA uFe alloy target. [100] Copyright 2013,R oyal Society of Chemistry. [113] It is proposed that although at the initial stage of the NP formation (kinetically controlled) during PLAL, the alloy structurew as generally preserved,t he internal phase of the NPs was transformed due to metal-solvent interactions.…”

Section: Reviewsmentioning

confidence: 99%

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Colloidal Metal Nanoparticles Prepared by Laser Ablation and their Applications

et al. 2017

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This review article highlights the recent advances of the synthesis and application of metal nanoparticles (NPs) fabricated via pulsed laser ablation in liquid (PLAL) phase and also introduces relevant NP formation mechanisms. Although wet-chemical approaches have been well established to synthesize colloidal metal NPs with various components and structures, some inherent drawbacks, such as reaction residuals and/or contaminations, largely limit some of their applications. The PLAL method has recently been developed as an alternative approach and received increasing attention for colloidal NP preparation, without involving complicated chemical reactions. In certain cases, by using PLAL, ligand-free and surface-clean NPs can be obtained and well dispersed in liquid, leading to the formation of a "surface-clean" NP dispersion. This unique feature renders PLAL-synthesised metal NPs attractive candidates for many interesting applications in catalysis, biology, sensing, and clean energy generation and storage. We conclude this review by proposing several interesting research directions and future challenges, from PLAL fabrication to applications. We hope this review can serve as a good reference and help with the further development of PLAL-NPs and their diverse applications.

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Section: Alloy Npsmentioning

confidence: 99%

Section: Reviewsmentioning

confidence: 99%

Section: Reviewsmentioning

confidence: 99%

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Colloidal Metal Nanoparticles Prepared by Laser Ablation and their Applications

et al. 2017

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“…Following the first ''cocktail recipe'', dual functions can easily be obtained by either synthesis of alloy nanoparticles or by doping oxide nanoparticles. When alloy nanoparticles are used as the target material, it is possible to combine the plasmonic properties of Ag or Au with the magnetic properties of Fe [58,62,78]. This coexistence of properties can be used for imaging techniques such as multimodal SERS-MRI-CT [62].…”

Section: Dual Functionsmentioning

confidence: 99%

Process Chain for the Fabrication of Nanoparticle Polymer Composites by Laser Ablation Synthesis

2017

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Nanoparticle polymer composites are of growing interest due to their unique properties. However, conventional composite synthesis methods usually require several process steps including steps for cleaning and improving the particlematrix dispersion. As an alternative, laser ablation synthesis can be used to prepare tunable composite materials. This method enables an easy process chain, without the need of additional steps. In this status report, the process chain of laser-based pre-series fabrication of nanocomposites is visualized, and the increase of the method's technology readiness level is demonstrated. The process steps are demonstrated from the synthesis of the colloid to applicable functional products. The advantages of using laser ablation for nanocomposite synthesis are highlighted.

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“…To this aim, the exploitation of iron-doped silver nanoparticles (NPs) synthesized by laser ablation of abulk bimetallic iron-silver target immersedi ne thanol is described. [52] Nanostructures with magnetic andp lasmonic responses obtained so far by this method include gold-iron [14,18,53,54] and silver-iron nanoalloys, [25] nanocrescents, [54] andc ore-shell structures with either ap lasmonic core and magnetic oxide shell [54] or am agnetic iron core and plasmonic shell. These iron-silver NPs show SERS performances, ar eady responset oe xternalm agnetic fields and complete flexibility in surface coating.…”

Section: Introductionmentioning

confidence: 99%

Magnetically Assembled SERS Substrates Composed of Iron–Silver Nanoparticles Obtained by Laser Ablation in Liquid

et al. 2016

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The widespread application of surface-enhanced Raman scattering (SERS) would benefit from simple and scalable self-assembly procedures for the realization of plasmonic arrays with a high density of electromagnetic hot-spots. To this aim, the exploitation of iron-doped silver nanoparticles (NPs) synthesized by laser ablation of a bulk bimetallic iron-silver target immersed in ethanol is described. The use of laser ablation in liquid is key to achieving bimetallic NPs in one step with a clean surface available for functionalization with the desired thiolated molecules. These iron-silver NPs show SERS performances, a ready response to external magnetic fields and complete flexibility in surface coating. All these characteristics were used for the magnetic assembly of plasmonic arrays which served as SERS substrates for the identification of molecules of analytical interest. The magnetic assembly of NPs allowed a 28-fold increase in the SERS signal of analytes compared to not-assembled NPs. The versatility of substrate preparation and the SERS performances were investigated as a function of NPs surface coating among different thiolated ligands. These results show a simple procedure to obtain magnetically assembled regenerable plasmonic arrays for repeated SERS investigation of different samples, and it can be of inspiration for the realization of other self-assembled and reconfigurable magnetic-plasmonic devices.

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Coexistence of plasmonic and magnetic properties in Au89Fe11 nanoalloys

Cited by 100 publications

References 85 publications

Colloidal Metal Nanoparticles Prepared by Laser Ablation and their Applications

Colloidal Metal Nanoparticles Prepared by Laser Ablation and their Applications

Process Chain for the Fabrication of Nanoparticle Polymer Composites by Laser Ablation Synthesis

Magnetically Assembled SERS Substrates Composed of Iron–Silver Nanoparticles Obtained by Laser Ablation in Liquid

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