2010
DOI: 10.1021/jp1068208
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Nucleation and Growth of Stellated Gold Clusters: Experimental Synthesis and Theoretical Study

Abstract: An experimental and theoretical study on the structure and energetics of stellated gold clusters at several sizes is presented. Systematic molecular dynamics simulations on Kepler-Poisont classified clusters are performed based on cuboctahedral and icosahedral cores, following present and previous studies that suggest that stellated clusters grew from these seeds. For cluster sizes up to 10802 atoms, full atomistic molecular dynamics simulations at room temperature have been carried out. Results show that stel… Show more

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Cited by 15 publications
(9 citation statements)
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“…Gold nanostars (AuNSs) are branched nanostructures consisting of a spherical core with several protruding spikes with sharp tips. They have high biocompatibility and chemical stability and unique optical properties, and therefore have attracted widespread attention for potential applications in nanomedicine. Their sharp features allow strong localized surface plasmon resonances (LSPRs), which provide the foundation for plasmon-enhanced spectroscopy, and make AuNSs promising tools for biological applications.…”
Section: Introductionmentioning
confidence: 99%
“…Gold nanostars (AuNSs) are branched nanostructures consisting of a spherical core with several protruding spikes with sharp tips. They have high biocompatibility and chemical stability and unique optical properties, and therefore have attracted widespread attention for potential applications in nanomedicine. Their sharp features allow strong localized surface plasmon resonances (LSPRs), which provide the foundation for plasmon-enhanced spectroscopy, and make AuNSs promising tools for biological applications.…”
Section: Introductionmentioning
confidence: 99%
“…During growth, some structural defects like twins and stacking faults may appear playing an important role in the final shape adopted by the branched nanoparticles. Originally, the synthesis of star-shaped nanoparticles was reported first for pure gold nanocrystals 7,9 and was later extended to bimetallic nanostructures. [10][11][12] Among bimetallic alloys, the importance of the gold-copper (Au-Cu) alloy comes from its ability to form a solid solution all over the composition range at high temperatures while it forms ordered phases like AuCu 3 (L1 2 ), AuCu (L1 0 ) and Au 3 Cu (L1 2 ), at lower temperatures.…”
mentioning
confidence: 99%
“…Recently, stellated nanoparticles have been synthesized and characterized by TEM and geometrical models to study their structure and energetic stability have been proposed [2,9]. From these models, the stellated cuboctahedral (SC) clusters have a rich surface: its morphology contains terraces with (111) and (100) faces, and a variety of edges and vertices, see Figure 1.…”
Section: Introductionmentioning
confidence: 99%
“…An structure of this kind would be useful to give some insight into our understanding of the reactivity of gold nanoparticles of technological interest, using alkanethiols as a probe and new developed reactive force fields discussed below. In order to study the reactivity of gold nanoparticles, in particular those of star-like shape, and to explore the polymerization of nanoparticles linked by dithiols, we have chosen the SC cluster model [2], octanedithiols (ODTLs) in the gas phase, interatomic ReaxFF-potentials for Au-S-C-H systems reported very recently [1], and the ReaxFF molecular dynamics (RMD) simulation method of van Duin [10].…”
Section: Introductionmentioning
confidence: 99%