منابع مشابه
Two-Stage Melting of Paramagnetic Colloidal Crystals in Two Dimensions
A novel two-dimensional system of colloidal particles with absolutely calibrated magnetic interaction is used to investigate static and dynamic properties at the 2D crystal to liquid phase transition. We observe two successive transitions from the solid to the liquid phase with an intermediate hexatic phase, in perfect agreement with the theory of Kosterlitz and Thouless. The absolute values of...
متن کاملMelting of Nanoparticles
The melting temperature of nanoparticles can be 10K-100K lower than the bulk materials due to higher value of surface by volume ratio. According to Gibb's-Thomson relation:- 4 1 sl m m b f s d d T T H But there has also supper heating phenomenon in case of embedded nanoparticle. Now we are going to discus melting of Zn-nanoparticles. Zinc is widely used in galvanizing...
متن کاملSelective Oxidation of Raw Glycerol Using Supported AuPd Nanoparticles
Bimetallic AuPd supported on different carbonaceous materials and TiO2 was tested in the liquid phase oxidation of commercial grade and raw glycerol. The latter was directly obtained from the base-catalyzed transesterification of edible rapeseed oil using KOH. The best catalytic results were obtained using activated carbon and nitrogen-functionalized carbon nanofibers as supports. In fact, the ...
متن کاملSize-dependent melting of Bi nanoparticles
Nanocalorimetry was used to investigate the melting of Bi nanoparticles. The particles were formed by evaporating Bi onto a silicon nitride substrate, which was then heated. The particles self-assemble into truncated spherical particles. Below 5-nm average film thickness, mean particle sizes increased linearly with deposition thickness but increased rapidly for 10-nm-thick films. As expected, s...
متن کاملUnderstanding the effect of ultrathin AuPd alloy shells of irregularly shaped Au@AuPd nanoparticles with high-index facets on enhanced performance of ethanol oxidation.
In this study, irregularly shaped, concave cuboidal Au@AuPd nanoparticles (ISCC-Au@AuPd NPs) with high-index facets were synthesized via Pd overgrowth on pre-formed ISCC-Au NPs with a concentration of Pd precursors as low as 2%. The AuPd alloy nature of the resulting shells was confirmed by X-ray photoelectron spectroscopy, cyclic voltammogram analysis, and energy dispersive X-ray spectroscopy....
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ژورنال
عنوان ژورنال: The Journal of Physical Chemistry B
سال: 2006
ISSN: 1520-6106,1520-5207
DOI: 10.1021/jp0614704