Abstract
This experimental study’s main goal is to investigate the impact of various silver concentrations on the optical characteristics of Agshell/Aucore bimetallic nanoparticles. By using the pulsed laser ablation in liquid (PLAL) technique on the gold target at the bottom of the container full of silver colloids, the silver/gold nanoparticles are ablated. Colloidal silver nanoparticles, created through a chemical reduction process, are inside the container. The second harmonic of the pulsed Nd:YAG laser is used to irradiate the colloidal mixture of mixed nanoparticles at a wavelength of 532 nm. The Agshell/Aucore bimetallic nanoparticles are created by transferring laser energy to gold nanoparticles, which have a peak absorption of around 530 nm. The experimental variables are the volumetric ratio of nanoparticle solutions. X-ray diffraction pattern (XRD), spectroscopy in the UV–Vis-NIR and IR ranges, dynamic light scattering (DLS), energy-dispersive spectroscopy (EDS), photoluminescence spectrum (PL), and Fourier transform infrared spectroscopy (FT-IR) are used to identify bimetallic nanoparticles. Additionally, FE-SEM and TEM pictures are used to look at the size and morphology of nanoparticles. In order to test the reactivity of silver nanoparticles in the bimetallic system, one goal of this research is the production of stable bimetallic systems and the examination of optical properties. Additionally, a bimetallic structure with a variable silver concentration’s shell thickness and catalytic qualities is examined. All samples in the visible range have dipole absorption observable. On the other hand, the first sample with a lower silver concentration exhibits quadrupole absorption.
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Availability of Data and Materials
The data that support the findings of this study are included in the articles.
Change history
23 September 2023
A Correction to this paper has been published: https://doi.org/10.1007/s11468-023-02052-z
Abbreviations
- NPs:
-
Nanoparticles
- MNPs:
-
Monometallic nanoparticles
- AuNPs:
-
Gold nanoparticles
- AgNPs:
-
Silver nanoparticles
- Ag/Au BNPs:
-
Silver/gold bimetallic nanoparticles
- PVP:
-
Polyvinyl pyrrolidine
- PLAL:
-
Pulsed laser ablation in liquid
- CRM:
-
Chemical reduction method
- LSPR:
-
Localized surface plasmon resonance
- DIW:
-
Distilled water
- FWHM:
-
Full width at half maximum
- UV:
-
Ultraviolet region
- VIS:
-
Visible region
- XRD:
-
X-ray diffraction pattern
- UV-Vis:
-
Ultraviolet-visible spectroscopy
- FE-SEM:
-
Field-emission scanning electron microscopy
- TEM :
-
Tunneling electron microscopy
- EDX:
-
Energy-dispersive spectroscopy
- FT-IR:
-
Fourier transform infrared spectroscopy
- PL:
-
Photoluminescence spectroscopy
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Acknowledgements
The authors would like to thank the Science and Research Branch of Islamic Azad University (SRBIAU) and above all the laser laboratory at the Plasma Physics Research Center (PPRC) for providing all the necessary facilities. We also recognize the TEM operator Mr. Hosseinpour from Khajeh Nasir University (KNU) for his meaningful guidance.
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The authors confirm their contribution to this document as follows: A. H. Sari devised the project, A. H. Sari presented the main conceptual ideas, A. H. Sari encouraged E. Mohebi to investigate a specific aspect of individual AgNP and Ag/Au BNP and supervised the findings of this work, D. Dorranian designed the experimental framework, D. Dorranian contributed to laser preparation, A. H. Sari and D. Dorranian verified the analytical methods, E. Mohebi worked out all of the experiment, S. AdibAmini wrote the manuscript with support from A. H. Sari and D. Dorranian, all authors contributed to the final version of the manuscript.
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Highlights
• Using two synthesis methods leads to the formation of a stable structure with a variety of sizes
• All samples show a core–shell structure with different thicknesses and catalytic properties
• Every sample has a dipole mode in the VIS area, and a quadrupole mode is only found in samples with low silver concentrations
The original online version of this article was revised: The order of the authors in the author group should be corrected.
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Mohebi, E., AdibAmini, S., Sari, A.H. et al. Formation of Agshell/Aucore Bimetallic Nanoparticles by Pulsed Laser Ablation Method: Effect of Colloidal/Solution Concentration. Plasmonics 19, 75–95 (2024). https://doi.org/10.1007/s11468-023-01976-w
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DOI: https://doi.org/10.1007/s11468-023-01976-w