Surface energy calculation of the fcc metals by using the MAEAM

Wen, Yanwei; Zhang, Jianmin

doi:10.1016/j.ssc.2007.07.012

Cited by 239 publications

(142 citation statements)

References 32 publications

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“…These features indicate crystalline texture in the biosynthesized nanoparticles where the (111) crystal faces are predominantly exposed, probably promoted by the reduction in the surface energy of the particles since the close-packed (111) surface exhibits the lowest surface energy for the fcc metals. 22,23 Additional small and very broad peaks at around 27.8°, 32.2°, and 46.2° were found. The appearance of similar peaks has been observed in other "biogenic-synthesized" Ag nanoparticles, and they have been ascribed to the crystallization of crystalline organometallic phase.…”

Section: Resultsmentioning

confidence: 94%

Microstructural, spectroscopic, and antibacterial properties of silver-based hybrid nanostructures biosynthesized using extracts of coriander leaves and seeds

Luna¹,

Barriga-Castro²,

Gómez-Treviño³

et al. 2016

IJN

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Coriander leaves and seeds have been highly appreciated since ancient times, not only due to their pleasant flavors but also due to their inhibitory activity on food degradation and their beneficial properties for health, both ascribed to their strong antioxidant activity. Recently, it has been shown that coriander leaf extracts can mediate the synthesis of metallic nanoparticles through oxidation/reduction reactions. In the present study, extracts of coriander leaves and seeds have been used as reaction media for the wet chemical synthesis of ultrafine silver nanoparticles and nanoparticle clusters, with urchin- and tree-like shapes, coated by biomolecules (mainly, proteins and polyphenols). In this greener route of nanostructure preparation, the active biocompounds of coriander simultaneously play the roles of reducing and stabilizing agents. The morphological and microstructural studies of the resulting biosynthesized silver nanostructures revealed that the nanostructures prepared with a small concentration of the precursor Ag salt (AgNO 3 =5 mM) exhibit an ultrafine size and a narrow size distribution, whereas particles synthesized with high concentrations of the precursor Ag salt (AgNO 3 =0.5 M) are polydisperse and formation of supramolecular structures occurs. Fourier transform infrared and Raman spectroscopy studies indicated that the bioreduction of the Ag − ions takes place through their interactions with free amines, carboxylate ions, and hydroxyl groups. As a consequence of such interactions, residues of proteins and polyphenols cap the biosynthesized Ag nanoparticles providing them a hybrid core/shell structure. In addition, these biosynthesized Ag nanomaterials exhibited size-dependent plasmon extinction bands and enhanced bactericidal activities against both Gram-positive and Gram-negative bacteria, displaying minimal inhibitory Ag concentrations lower than typical values reported in the literature for Ag nanoparticles, probably due to the synergy of the bactericidal activities of the Ag nanoparticle cores and their capping ligands.

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Section: Resultsmentioning

confidence: 94%

Microstructural, spectroscopic, and antibacterial properties of silver-based hybrid nanostructures biosynthesized using extracts of coriander leaves and seeds

Luna¹,

Barriga-Castro²,

Gómez-Treviño³

et al. 2016

IJN

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“…The thermodynamic magnitudes thus-obtained [viz, γ s surface energy and γ gb (θ )] by EAM are in good agreement with those reported by Wen and Zhang. 24 …”

Section: Resultsmentioning

confidence: 99%

Morphology evolution of thermally annealed polycrystalline thin films

et al. 2011

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Investigation of the morphology evolution of annealed polycrystalline Au(111) films by atomic force microscopy and x-ray diffraction leads to a continuous model that correlates such an evolution to local interactions between grains triggering different mechanisms of stress accommodation (grain zipping and shear strain) and relaxation (gap filling and grain rotation). The model takes into consideration findings concerning the in-plane reorientation of the grains during the coalescence to provide a comprehensive picture of the grain-size dependence of the interactions (underlying the origin of the growth stress in polycrystalline systems); and in particular it sheds light on the postcoalescence compressive stress as a consequence of the kinetic limitations for the reorientation of larger surface structures.

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“…So far, bimetallic Au@Rh core-shell nanostructures are rarely synthesized, 19,33,34 which may be ascribed to the unfavorable thermodynamic equilibrium due to the large lattice mismatch (7%, Au 0.408 nm versus Rh 0.380 nm) 34,35 and large surface energy variance (43%, Au 1.6 J m − 2 versus Rh 2.8 J m − 2 ). 28,35,36 In this work, we demonstrated that bimetallic Au@Rh core-shell nanodendrites with a well-defined octahedral Au core and a dendritic Rh shell could be easily achieved by a facile one-pot hydrothermal method, using polyallylamine hydrochloride (Supplementary Scheme S1A) as a surfactant and diethylene glycol (Supplementary Scheme S1B) as a reductant. The physical characterization indicated that the dendritic Rh shells were composed of the atomically thick two-dimensional (2D) ultrathin Rh nanoplates.…”

Section: Introductionmentioning

confidence: 93%

Bimetallic AuRh nanodendrites consisting of Au icosahedron cores and atomically ultrathin Rh nanoplate shells: synthesis and light-enhanced catalytic activity

et al. 2017

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Precise control of the morphology, composition and structure of metal nanostructures not only effectively improves their catalytic activity and durability but also enhances their range of applications. In this work, bimetallic Au@Rh core-shell nanodendrites are synthesized by a facile one-pot hydrothermal method. Physical characterizations show that the dendritic Rh consists of two-dimensional (2D) ultrathin Rh nanoplates with a thickness of approximately 1.2 nm. For the first time, Au@Rh core-shell nanostructures are used as a catalyst for the hydrogen generation reaction from aqueous hydrazine solution (N 2 H 4 = N 2 +2H 2 , HGR-N 2 H 4 ). Bimetallic Au@Rh core-shell nanodendrites exhibit improved catalytic activity and durability for the HGR-N 2 H 4 compared with commercial Rh nanocrystals, which can be attributed to the atomically ultrathin structure of 2D Rh nanoplates and the interconnected structure of nanodendrites, respectively. Under light irradiation, bimetallic Au@Rh core-shell nanodendrites show light-enhanced catalytic activity for the HGR-N 2 H 4 , originating from the distinctive localized surface plasmon resonance of Au icosahedron cores.

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Surface energy calculation of the fcc metals by using the MAEAM

Cited by 239 publications

References 32 publications

Microstructural, spectroscopic, and antibacterial properties of silver-based hybrid nanostructures biosynthesized using extracts of coriander leaves and seeds

Microstructural, spectroscopic, and antibacterial properties of silver-based hybrid nanostructures biosynthesized using extracts of coriander leaves and seeds

Morphology evolution of thermally annealed polycrystalline thin films

Bimetallic AuRh nanodendrites consisting of Au icosahedron cores and atomically ultrathin Rh nanoplate shells: synthesis and light-enhanced catalytic activity

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