Heterogeneous to homogeneous Cu–Ag nanoparticles by laser reduction in liquid

Nag, Ashish; Nguyen, Christopher; Tibbetts, Katharine Moore

doi:10.1016/j.apsusc.2022.155384

Cited by 15 publications

(8 citation statements)

References 60 publications

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“…The intensity and the FWHM of these peaks for the Ag-Cu-3 sample are high and low, respectively which is consistent with the partial separation of the Cu layer in figure 2(a) and the formation of partly pure spherical Ag NPs. Different LSPR peaks that appeared around 400 nm are related to the formation of spherical Ag NPs with different diameters [13] and the blue shifts in the LSPR wavelength in the range of 580-700 nm can be due to increasing the number of silver atoms in the formed NPs [34].…”

Section: Resultsmentioning

confidence: 99%

“…Also, the superior catalytic activity of Ag-Pt NPs for the oxygen reduction reaction compared to monometallic Pt nanoparticles has been reported [33]. Also, recently, Cu-Ag NPs with tunable compositions and structures have been synthesized using femtosecond laser reduction in solutions of copper and silver precursor [34]. Magnetic properties of copper oxide NPs have been also reported which can be used in Ag-Cu NPs to provide the magnetic properties in the NPs [35].…”

Section: Introductionmentioning

confidence: 99%

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Surface structured silver-copper bimetallic nanoparticles by irradiation of excimer laser pulses to bilayer thin films

Naranji,

Aliannezhadi,

Panahibakhsh

2023

Phys. Scr.

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Optical chips based on plasmonic bimetal nanoparticles are of particular interest for various applications, including optical sensors, as well as plasmon-enhanced fluorescence and plasmon-enhanced Raman scattering due to their extraordinary optical properties. In the paper, the formation of the bimetallic nanoparticles on the BK7 substrate and tuning of the LSPR wavelengths by irradiation of excimer laser pulses (193 nm output wavelength and 15 ns temporal pulse linewidth) to silver-copper thin films deposited by the physical vapor deposition (PVD) method is studied. Applying four and five ArF laser pulses with the fluence of 140 mJ/cm2 leads to the formation of spherical Ag-Cu nanoparticles and clusters, respectively, with several LSPR peaks in the UV and visible ranges. Also, sharp and intense LSPR peaks in the 560 to 700 nm spectral range are observed in the absorption spectra of the produced samples with four laser pulses which indicates the ability of the method for tuning the LSPR wavelength. Furthermore, the highest enhancement in the Raman scattering of R6G solution is provided using this sample as a substrate for Raman spectroscopy. Therefore, the laser-produced spherical Ag-Cu NPs by these parameters of laser irradiation can be a good candidate for applications based on LSPR, and Raman or fluorescence enhancement.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surface structured silver-copper bimetallic nanoparticles by irradiation of excimer laser pulses to bilayer thin films

Naranji,

Aliannezhadi,

Panahibakhsh

2023

Phys. Scr.

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“…No organic ligands were observed on the Au NPs synthesized in water/IPA, 18 but LRL of copper and silver acetylacetonate in IPA produced NPs with a carbon shell. 59,60…”

Section: Resultsmentioning

confidence: 99%

Understanding photochemical pathways of laser-induced metal ion reduction through byproduct analysis

Frias Batista,

Moody,

Weththasingha

et al. 2023

Phys. Chem. Chem. Phys.

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“…4 Our group has shown that the comparatively less-investigated method of LRL can offer the advantages of substantially enhanced yields of sub-5 nm NPs [5][6][7][8][9][10] and the ability to tailor the elemental composition and distribution in bimetallic alloy NPs. 11,12 The scope of accessible nanomaterial compositions and structures can be further enhanced by combining LAL with LRL, in what is known as reactive laser ablation in liquid (RLAL). RLAL involves ablation of a solid or powdered metal target in a solution containing one or more metal salts that react with the ablated material to form myriad nanomaterials including metal oxide-supported metal NPs; [13][14][15] multimetallic NPs with core-shell, [16][17][18] alloy, [19][20][21] and mineral [22][23][24][25] compositions; and metallic nanostructures deposited on to silicon laser-induced periodic surface structures (LIPSS).…”

Section: Introductionmentioning

confidence: 99%

Chemical strategies for tailoring properties of nanomaterials produced by pulsed laser interaction in liquid environments

Tibbetts

2024

High-Power Laser Ablation VIII

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Interactions of intense ultrashort laser pulses with liquid media and at solid-liquid interfaces produce plasmas with high densities of reactive chemical species that promote the formation of nanomaterials. This work discusses the current understanding of laser-induced chemical reactions in aqueous medium involving hydrated electrons and hydroxyl radicals, and the effects of chemical additives on these reactions. Two chemical strategies are presented for controlling the composition of the laser-induced plasma and nanomaterial properties. First, adding chemical scavengers of hydroxyl radicals will be shown to inhibit metal oxidation, enabling the synthesis of ligand-free Ag and Au-Ag alloy nanoparticles by reduction of Au and Ag salts. Second, ablating a silicon wafer in a solution containing two metal salts with different reduction potentials will be shown to enhance the deposition of the high-reduction potential metal onto the ablated silicon surface, producing high densities of metal nanostructures on silicon laser-induced periodic surface structures (LIPSS).

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Heterogeneous to homogeneous Cu–Ag nanoparticles by laser reduction in liquid

Cited by 15 publications

References 60 publications

Surface structured silver-copper bimetallic nanoparticles by irradiation of excimer laser pulses to bilayer thin films

Surface structured silver-copper bimetallic nanoparticles by irradiation of excimer laser pulses to bilayer thin films

Understanding photochemical pathways of laser-induced metal ion reduction through byproduct analysis

Chemical strategies for tailoring properties of nanomaterials produced by pulsed laser interaction in liquid environments

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