Relating the rate of growth of metal nanoparticles to cluster size distribution in electroless deposition

Iatalese, M.; Coluccio, Maria Laura; Onesto, Valentina; Amato, Francesco; Fabrizio, E. Di; Gentile, Francesco

doi:10.1039/c8na00040a

Cited by 15 publications

(10 citation statements)

References 43 publications

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“…Differently, without the energy minimization condition the numerical aggregates exhibit a branched and multiscale structure typical of fractals ( Figure 9 c). We used a density–density correlation function [ 64 ] to analyze and compare the internal structure of the aggregates resulting from different algorithms ( Figure 9 d). The density–density correlation function

describes the information content of an aggregate as a function of the spatial coordinate

.…”

Section: Resultsmentioning

confidence: 99%

Experimental and Theoretical Studies on Sustainable Synthesis of Gold Sol Displaying Dichroic Effect

et al. 2021

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Gold nanoparticles depending on their shape and mixtures of multiple shapes can exhibit peculiar optical properties, including the dichroic effect typical of the Lycurgus cup, which has puzzled scientists for a long time. Such optical properties have been recently exploited in several fields such as paint technology, sensors, dichroic polarizers, display (LCD) devices, laser applications, solar cells and photothermal therapy among others. In this article, we have demonstrated a simple room temperature one-pot synthesis of gold sol displaying a dichroic effect using a slow reduction protocol involving only trisodium citrate as a reducing agent. We found that the dichroic gold sol can be easily formed at room temperature by reducing gold salt by trisodium citrate below a certain critical concentration. The sol displayed an orangish-brown color in scattered/reflected light and violet/blue/indigo/purple/red/pink in transmitted light, depending on the experimental conditions. With minor changes such as the introduction of a third molecule or replacing a small amount of water in the reaction mixture with ethanol, the color of the gold sol under transmitted light changed and a variety of shades of red, pink, cobalt blue, violet, magenta and purple were obtained. The main advantage of the proposed method lies in its simplicity, which involves the identification of the right ratio of the reactants, and simple mixing of reactants at room temperature with no other requirements. TEM micrographs displayed the formation of two main types of particles viz. single crystal gold nanoplates and polycrystalline faceted polyhedron nanoparticles. The mechanism of growth of the nanoplates and faceted polyhedron particles have been described by an enhanced diffusion limited aggregation numerical scheme, where it was assumed that both trisodium citrate and the gold ions in solution undergo a stochastic Brownian motion, and that the evolution of the entire system is regulated by a principle of energy minimization. The predictions of the model matched with the experiments with a good accuracy, indicating that the initial hypothesis is correct.

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describes the information content of an aggregate as a function of the spatial coordinate

.…”

Section: Resultsmentioning

confidence: 99%

Experimental and Theoretical Studies on Sustainable Synthesis of Gold Sol Displaying Dichroic Effect

et al. 2021

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“…S2 †). [42][43][44][45][46][47] These phenomena have been explained by the formation of small gaps between adjacent particles to induce interparticle plasmonic coupling whose spacing governs the degree of the wavelength shi. Specically, the silver plasmonic paper displayed one intense peak at 400 nm and a small band at 700 nm where the latter peak might arise from the strongly induced NP interactions in the large areas of randomly aggregated AgNPs.…”

Section: Resultsmentioning

confidence: 99%

Sandwiching analytes with structurally diverse plasmonic nanoparticles on paper substrates for surface enhanced Raman spectroscopy

et al. 2019

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“…Improving the catalytic activity entails not only decreasing the particle size of nanomaterials but also achieving homogeneous dispersal of the active sites, as relatively few are available for the substrate . It has been proven theoretically and experimentally that a metal cluster of very small nanoparticles (<1 nm) has significantly higher catalytic activity compared to larger nanoparticles of the respective metal . This could occur because as the size decreases more and more unsaturated coordination sites on the surface of the nanoparticles are available, thus increasing the surface free energy. , In the case of extremely small nanoparticles at the atomic level, because of highly active valence electrons, quantum confinement of electrons in a d orbital, and quantization of the energy level causes the surface free energy of the metal species to attain a maximum, − which helps them to interact strongly with the support and provides them with unique stability and interesting chemical properties. , …”

Section: Synthesis Of Fe-sacsmentioning

confidence: 99%

Single-Atom (Iron-Based) Catalysts: Synthesis and Applications

et al. 2021

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Supported single-metal atom catalysts (SACs) are constituted of isolated active metal centers, which are heterogenized on inert supports such as graphene, porous carbon, and metal oxides. Their thermal stability, electronic properties, and catalytic activities can be controlled via interactions between the single-metal atom center and neighboring heteroatoms such as nitrogen, oxygen, and sulfur. Due to the atomic dispersion of the active catalytic centers, the amount of metal required for catalysis can be decreased, thus offering new possibilities to control the selectivity of a given transformation as well as to improve catalyst turnover frequencies and turnover numbers. This review aims to comprehensively summarize the synthesis of Fe-SACs with a focus on anchoring single atoms (SA) on carbon/graphene supports. The characterization of these advanced materials using various spectroscopic techniques and their applications in diverse research areas are described. When applicable, mechanistic investigations conducted to understand the specific behavior of Fe-SACs-based catalysts are highlighted, including the use of theoretical models. CONTENTS 1. Introduction 13620 2. Scope of This Review 13623 3. Synthesis of Fe-SACs 13623 3.1. N-Doped Graphene-Based Fe-SACs 13623 3.2. Nitrogen-Doped Porous Carbon-Based Fe-SACs 13626 3.3. C 3 N 4 -Based Fe-SACs 13634 4.

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Relating the rate of growth of metal nanoparticles to cluster size distribution in electroless deposition

Cited by 15 publications

References 43 publications

Experimental and Theoretical Studies on Sustainable Synthesis of Gold Sol Displaying Dichroic Effect

Experimental and Theoretical Studies on Sustainable Synthesis of Gold Sol Displaying Dichroic Effect

Sandwiching analytes with structurally diverse plasmonic nanoparticles on paper substrates for surface enhanced Raman spectroscopy

Single-Atom (Iron-Based) Catalysts: Synthesis and Applications

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