Single Step Laser-Induced Deposition of Plasmonic Au, Ag, Pt Mono-, Bi- and Tri-Metallic Nanoparticles.

Daria V. Mamonova,Anna A. Vasileva,Julien Bachmann,Yuri V. Petrov,Gulia I. Bikbaeva,Alina A. Manshina,Ilya E. Kolesnikov,Alexandra V. Koroleva,Denis V. Danilov

doi:10.3390/nano12010146

Daria V. Mamonova, Anna A. Vasileva + Show 7 more

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https://doi.org/10.3390/nano12010146

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Abstract

Multimetallic plasmonic systems usually have distinct advantages over monometallic nanoparticles due to the peculiarity of the electronic structure appearing in advanced functionality systems, which is of great importance in a variety of applications including catalysis and sensing. Despite several reported techniques, the controllable synthesis of multimetallic plasmonic nanoparticles in soft conditions is still a challenge. Here, mono-, bi- and tri-metallic nanoparticles were successfully obtained as a result of a single step laser-induced deposition approach from monometallic commercially available precursors. The process of nanoparticles formation is starting with photodecomposition of the metal precursor resulting in nucleation and the following growth of the metal phase. The deposited nanoparticles were studied comprehensively with various experimental techniques such as SEM, TEM, EDX, XPS, and UV-VIS absorption spectroscopy. The size of monometallic nanoparticles is strongly dependent on the type of metal: 140–200 nm for Au, 40–60 nm for Ag, 2–3 nm for Pt. Bi- and trimetallic nanoparticles were core-shell structures representing monometallic crystallites surrounded by an alloy of respective metals. The formation of an alloy phase took place between monometallic nanocrystallites of different metals in course of their growth and agglomeration stage.

Highlights

Plasmonic nanoparticles are a matter of intense current research in many scientific directions connected with the development of synthetic procedures [1,2], various applications in electrochemistry and catalysis [3,4,5], phase contrast in bioimaging [6], and metal-enhanced fluorescence (MEF) [7]
It is interesting to note that monometallic systems are characterized by higher particle agglomeration than bimetallic structures, bimetallic systems result in the formation of denser films as compared with monometallic structures
Similar experimental parameters of the laser-induced deposition (LID) process, one can observe different surface morphology for monometallic nanoparticles—gold particles form the densest coating in comparison with platinum and silver nanoparticles

Summary

Introduction

Plasmonic nanoparticles are a matter of intense current research in many scientific directions connected with the development of synthetic procedures [1,2], various applications in electrochemistry and catalysis [3,4,5], phase contrast in bioimaging [6], and metal-enhanced fluorescence (MEF) [7]. Nanomaterials 2022, 12, 146 material of NPs, its size, shape, morphology, and surrounding medium [12]. By variation of these parameters, the LSPR can be tuned in a wide spectral range and optimized for exact sensing and spectroscopy application [13,14]. Functional features of multimetallic nanosystems depend strongly on their morphology and nature of the multimetallic phase—a mixture of pure metals, or alloy, or core/shell structures. The main factors determining the kind of multimetallic phase are connected with the chemical nature of metals and their phase diagrams Another very important factor is the synthetic process that can favor the formation of one or the other phase kind dependent on synthesis conditions. I.e Tang et al [20]

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